Yeah because its not at all cutting edge and its not a secret that yellow is between 560 and 590nm. There is no need of "searching for 25 years for the right wavelength". Science behind light is already fully cracked and one second of googlesearch away :D
@@nicoschroeder5379hey, you understand that you can't just turn a knob and get a laser at any wavelength, right? How could you have watched this video and formed this opinion?
@@nicoschroeder5379 Tell me you haven’t watched the video without telling me you haven’t watched the video. He said it was cutting edge technology after he tested the infrared values considering that none of his other lasers did that
You ever stumble across a video where you pretty much know nothing about what they’re talking about, but you have enough generalist knowledge to completely appreciate every single second of it? This is both humbling and very enjoyable. Thank you for sharing your excessively nerdy passion with this exceptionally passionate nerd ❤
This really made me a bit emotional. The color correction felt like seeing something that shouldn't exist. Something about the awesome golden light just moved me. Thank you for sharing this.
10 through 15 looked yellow to me, with 12 or 13 being the "most yellow". Before those, I'd call the colour "green", and afterwards I'd call it "orange".
same, I could agree to 9 being a slightly green yellow but anything below that is neon/lime green. Similarly I could call 16 a dark yellow but anything above that is just orange
With a true color screen. 12 has hints of green. 13 and 14 were more true yellow color. 14 has hints of orange though is a typical car paint shade of color.
Hey, fellow hobbyist here. I'd recommend punching out one of the diffraction grating caps, or going a step beyond that to add a glass diode window. The collimation lenses on these newer yellow-gap lasers have a thin coating on them that is very easy to ruin by trying to clean them or even just by dust. Nice review!
i heard about some students at a university in Australia making a true yellow LASER many years ago... cool to actually see one. thanks for the colour correction😍👍
So happy I found this. I have two high power 589nm Dragon Spartan lasers that are absolutely gorgeous but Ive been patiently waiting for something like this!
@@mikayla_collie If you have a laser with 20,000 pulses per second, slo mo guys have cameras which can easily go past that framerate and track the pulsing.
Whoa, we still have a ways to go with perfecting screen and camera technology. I've never been so intrigued by the color yellow, as a fan of green myself.
@@jamiealeksic8428 Then they should find out how to adjust *and calibrate their colors, at least roughly. Both my monitors 13 is a perfect yellow. an HP whatever and a LG IPS display.
@@jamiealeksic8428exactly this. I have two cheap monitors at work, the main one is less red than the secondary one, so 13 looks greenish on it, and 13 looks pure yellow on the other one.
Congratulations. This is truly a phenomenal achievement. Related: used to set up video walls back when they were CRT and then dlp. No matter the customer there was at least a man day worth of time teaching color science and theory. The questions were always why doesn't this look as good as they do on TV/ magazine. And it looks good here now but when I walk over here the colors are all wrong again.
Cool part of DLP was they always added more support colors to the color wheel, cyan, yellow, magenta, etc... Cool stuff outside of the ghosting effect when you moved your eyes :D
9:10 no you don't, you just need a rotating mirror and a photographic camera. Make the beam move fast enough and with a long exposure shot you'll photograph a dotted/dashed line. Also, the bit about the "which color looks more yellow" just confirmed to me that my main monitor is completely out of calibration, and my secondary Dell monitor is much more accurate.
That works, good idea. I wouldn't suggest a long exposure - the shorter the exposure the higher the frequency you can capture whereas the longer the exposure the more accurately you can measure leading to a trade off. But absolutely moving the laser at a consistent (preferably high) speed would allow a high frequency pulse to be detected and all relevant details measured with reasonable accuracy by a lower frequency camera. A spinning mirror would offer that (with some line length trig needed). Again, great idea. - From a random postgraduate physicist.
I don't have a good mirror handy. I do have a fidget spinner. I would just spin the whole laser. My front surface mirrors have issues that would distort the beam. (In other words, I didn't store them right.) Other mirrors will have an annoying second image.
What an event to celebrate! There's little pure yellow in Nature though, although that's no reason for us not to view it, as some other species may do. And so, I fancy about the time, at which, by gene-manipulation or device-implantation, we'll come to see all of the primary colours - and in great detail, so that, in sixty-or-so years, we shall be able to detect violet, pure blue, green, yellow, scarlet and maroon - or more. But, in any event, it would sure be worth waiting for
This was an incredibly interesting what of conveying this thing which CANNOT be conveyed with your cameras, our screens, and the fact that all of our perceptions - and INTERPRETATIONS - of color are different! You managed to solve all of these, by telling us that, to your eyes, the laser most closely matched the 12 sample. And while we have no real confirmation for ourselves, you've basically narrowed the gap down to... "your credibility and our willingness to trust in you," which is quite a bit easier than... just assuming all of those other variables are somehow magically correct for each and every viewer. Furthermore, the spectrometer helped! And the additional complication at 5:00 was fascinating!! I love when videos are this thorough
I never thought about yellow lasers, but your quest for one got me excited. My dream is a true blue, so now I am excited again! Best of luck with that. Also, 12 was the yellowest yellow to my eyes.
Biomedical applications: Flow cytometry: 573nm lasers are used to excite fluorescent dyes in cells, allowing researchers to analyze and sort different cell populations based on their characteristics. Confocal microscopy: This technique uses lasers to create high-resolution images of biological samples. 573nm lasers can be used to excite specific fluorophores in the sample, providing detailed information about its structure and function. Ophthalmology: Yellow-green lasers are used in some retinal imaging and treatment procedures. Other applications: Holography: 573nm lasers can be used to create holograms, which are three-dimensional images created with light. Laser light shows: The yellow-green color of 573nm lasers makes them suitable for creating visually appealing laser displays. Material processing: These lasers can be used for micromachining and marking certain materials. Metrology: 573nm lasers can be used for precise distance measurements and other metrology applications.
@@Cyberguy42LEDs also function as very inefficient photodiodes, so if you pulse light into them and hook it up to an oscilloscope you’ll be able to see the pulses. Not sure if they’re selective for colour though, but if they are this’d work very effectively.
i was between 13 and 14 but that may be the color on my monitor. this is seriously impressive and had never thought about there being a yellow gap before.
for me 12-16 is the yellow region, with 10-11 and 17 being the transition regions it's hard to say which one is theb"most yellow" because 12-13 is lemon yellow and 15-16 is the sand yellow I can totally understand people thinking lemon is the true yellow, but I was taught that sand color in kindergarden
From what I remember from my practical physics lasers courses, you can get yellow by using non optimal angle on the OPO (optical parametric generation) crystal . I don’t know the efficiency but it should be pretty low compared to green if you use a 1064 nm laser, but with the crazy power/price we can get nowadays maybe it would be enough to get 20mw of yellow output at a reasonable price. Maybe the large metal casing is to dissipate more efficiently the waste heat.
There's no "yellow gap" in camera. The only reason colour reproduction failed is that no tristimulus camera implements human metamerism. Every camera uses colour profile to produce realistic output but it can only do that for some subset of spectral distributions and it so happens that your camera's profile kills pure yellow. In principle there is nothing preventing same issue with red, green and blue since all of them are recorded as a mix.
Aren't CMOS sensors with RGB filters, ergo non of them are passing monochromatic yellow? Most of the time yellow is non monochromatic, it is a spectrum from white light deflection, therefore red and green are "flying in" at the same time.
It's not really a camera issue entirely, with the proper sensor it can capture any visible light color (just as their spectrometer can, just depends on the sensor though). The bigger issue is with the screen itself. Most monitors use the sRGB color space and things with nearly singular wavelength spectral distributions like lasers will resolve to colors outside this gamut. As such these colors will end up as imaginary colors in sRGB and will clamp into the gamut which will distort their hue. With a proper theoretical monitor that had perfect coverage of the entire gamut this color could be displayed properly, and in time monitors with say Rec 2020 coverage will cover most the perceptible human visual gamut anyways and won't distort colors quite so much, so this is mostly just an issue with current 90s-era non-WCG monitor color standards beyond just the sensor's ability to capture it.
"Aren't CMOS sensors with RGB filters, ergo non of them are passing monochromatic yellow?" That's false. Every non-specialized image sensor has sensitivity to all wavelengths between 400 and 700 nm. "It's not really a camera issue entirely, with the proper sensor" You did not read my comment. You do not understand what I say but you also do not ask questions. "The bigger issue is with the screen itself." There is no issue with screens. Any sRGB-calibrated screen is capable of accurate colour reproduction of any correctly recorded colour within it's gamut. Cameras on the other hand cannot ever be calibrated except for a subset of spectral distributions. A set of spectral distributions might produce same colour for a human but it will get mapped to different colours in the camera. The characteristic which defines whether it happens or not is "metamerism".
@@ПётрБ-с2ц You didn't read what I said. This yellow laser color is fundamentally outside the sRGB gamut, and therefore is impossible to display on any consumer monitor which is likely part of why it shifts to green like this. You probably do not fully understand how color works in computers if you do not think the monitor is an issue in this case. This has nothing to do with "metamerisms", I do not think you again understand how color works in computers. Spectral data once measured can be converted to human-recognizable colors via color-matching functions that have been measured based on human perception. All computer color is already based around these "metamerisms" and other perceptual illusions with saturation, contrast and etc (with varying degrees of accuracy depending on the model use). Of course, the camera is not a spectrometer so the problem may also be that indeed something with how it measures the color, but it does not really need to know what the exact spectral distribution is to know what color it is if it has a conversion to these other established color spaces. It's not going to be perfect but yeah it clearly works well enough when designed properly as cameras look quite accurate to what we see otherwise.
The first one I thought of as "that's yellow" was 12, but then 13 popped up and I instantly changed my answer. I should note that I've got a calibrated, Pantone certified OLED display. Other displays, tend to be red-shifted from factory to (over) compensate for the blue phosphor in the backlight because people generally prefer warmer light sources. In full saturation with no context, it would make sense that "yellow" would be perceived a frame or two sooner than on a display intended for real-world color accuracy.
That's not necessarily impossible you just need a near infrared red wavelength that you can see that interferes with a wavelength of a yellow. Both of which you have to be able to see. Its like using noise canceling.
@@crusher9z9 jaredf6205 was pointing out that it doesn't really make sense to compare a yellow laser to a brown light emitting bulb since 'brown light' does not exist (the color brown is merely how our brains interpret a combination of lights with certain wavelengths). In contrast, yellow light does exist, so while a yellow laser may have been quite difficult to develop (as was the case with the blue led), there was at least reason to believe that it was possible.
@Cyberguy42 brown is one wavelength. Orange. In order to make brown light though you need to do some shenanigans with destructive interference, like about half of the frequency as the orange light used. Probably.
Glad you like them! I would say I quite often release a video about lasers - one of the main topics of my channel and always visually spectacular compared to magnets ;) More laser videos to come in the future!
It's like there's some buggery going on here! First that laser definitely appeared green to me but then after going through the numbered gradient exercise and seeing its beam together with the real green one, it correctly appears yellow throughout the rest of the video 🤔 edit: The buggery is software colour correction apparently :D
@@delphicdescant Your eyes can also adjust white balance so this effect can happen IRL. This is visible when aligning large arrays of multi-wavelength red diodes. 637 and 655 look basically identical at first. 30 minutes later after aligning 15-20 diodes or so (not even half way.. :() the light red looks pink and the dark red looks red... Also had weird stuff happen with green or red outputs then going into a white light situation, it shifts dramatically.
As someone who is colorblind. 1 through 13 looked pretty much the same. I could see all of them being called yellow.(though seeing the comparison later on side by side, 4 compared to 12 looked very different) But 14 had a very obvious shift to not being yellow and every color after that.
Your brain tries to compensate, so your perception is based on the previously viewed colors. Maybe my choice would be different if you went from red to green?
I think they are achieving the frequency by employing Doppler shift. I also believe they are accomplishing this in one of two ways: #1: get as close as possible with traditional, off the shelf technology and then direct the beam into a rotating mirror at a specific angle of incidence. The resultant "reflected light" would have it's wavelength lowered by a predictable (but more importantly) TUNEABLE amount 2: To obtain the needed Doppler shift without the need for bulky spinning mirrors, you could use a mirror mounted onto a piezoelectric material like quartz, and then all you would have to do is tune the frequency until you get about double the yellow frequency. Once you are at double the desired frequency, you simply intermittently interrupt the beam so that it appears to be half of what it actually is. I'm probably not describing it in a way that makes sense but i can visualize it in my head.
10-13 is what I'd call yellow, with 12 being a very strong yellow. For me it felt like quite a noticeable transition from 9-10 (green to yellow), and 13-14 (yellow to orange).
Laser pumping is such a strange and cool phenomenon. Reminds me of how they have to double-pump the diodes at the National Ignition Facility. So I love the investigation part of this video.
I mean for a very long time blue LEDs were thought to be impossible. Everyone tried and failed. It was once believed LEDs would never light kitchens, bedrooms, or especially not television screens, etc. Then a researcher named Shuji Nakamura, working for a small chemical company called Nichia, came up with a plan to save the company he was working for. It was struggling to compete in the market for manufacture of red and green LEDs. He modified and made his own equipment and eventually found the path and created the worlds first blue LED. Ushering in the world we know today of LEDs lighting most things, brighter and using less energy than ever before. While I do not know the story or process for how the yellow laser came about. I'm positive the story is very similar. Lots of time, research, development and motivation surely brought about the new 573nm laser. Necessity is the mother of invention and physics are awesome. For me, actually 10 or 11 was the most yellow. But early on I almost wanted to say 9 or 10. Though looking at them all on the screen at the same time, 9 is still pretty green to me.
A couple more interesting phenomena that can be observed with 573nm is red shifting during scotopic conditions. The 573nm will look purer yellow in darker conditions than in lighter. And vast colour perception changes depending on what reference source is used. For example use that 558nm next to it and the 573nm will look like 583nm. You don't have too have the reference source on when observing the 573nm either. Your eyes need to readjust so you can turn off the reference source and use the 573nm straightaway afterwards and observe a change. This also works in the other direction when using a longer wavelength as a reference.
Don't forget that the eye constantly makes white balance adjustments and depending on your environmental lighting the laser could look more green (warm ambient light) or yellow (cold ambient light). Same goes for the white balance of the camera. Try setting the White balance of the camera to 3600K, 5000K and 6400K and film the laser light.
A lot of people are saying 13, which I can sorta understand, but I personally feel like 15 is the most yellow, while 12-14 feel a tiny bit greenish to me and 16+ seem too orange.
for the yellow test, I was using an old TV for a monitor and 15 looked the most yellow (though it got hard to differentiate between 12-14) then I switched to another monitor and there's clear separation between all of the, with 13 definitely being the most yellow
In my high school physics class my professor brought out tubes of florecing gasses and we analyzed them with spectrometers to determine what elements were in them. My professor also brought out a tube that floreced tried yellow and told us about how if you get 2 mutated x chromosomes there is a chance you can see true yellow as an entirely unique color, having genes that encode for cones in your eyes that can see yellow! It's just as different to these women as green and red are to you and me and they see true yellow as different than our yellow!
Ooh nice cars too! I see a Ferarri F40, a Dodge Viper, a Porsche 911, a Porsche Boxster, a Lamborghini Murcielago, a TVR (I think), a Nissan 350Z, some more Ferarris that I can't quite ID.
I never hated colour blindness more than i do now. That said i've always heard the fabled yellow lazer is nearly impossible... truly legendary stuff. I love you. Well, I love this video at least!
The reason is that our eyes combine red and green to produce yellow, whereas 585 nanometer light is not very stimulating to either the red or green sensors in our eyes, or some byproduct of our color vision processing pipeline.
To me 13 looked the most yellow, but 12 was close enough if i've seen it just alone to call it yellow. Nice job color correcting, i imagine it wasn't very easy
Really interesting. How they did it…If they are using a higher infrared diode, maybe they have a down step transformer of some kind, with a harmonic amplifier to create a lower peak frequency, kind of like pulling out a real bass note with a high string harmonic on instruments. That would be my guess.
12 is the purest yellow, with 11 being the next contender. When all shown in the screen 1-10 form a greenish group, 11 and 12 are independent, 13+ form a reddish group.
I remember (I think) Sony was experimenting with putting a yellow LED in their TV's to make up for the loss of the color when viewing movies. Nothing ever came from it and they still only put RGB in the screens.
12 looked the most yellow to me when they were going by one at a time, but then you displayed them all on screen at once and it looked like 13 was the most yellow.
15 is the purest yellow for me. Or 14. 12 is "yellow" but clearly has the sensation of green light in there as well. 16 is where it's less pure yellow and more orange to me.
It looked the most yellow between cards 11 and 14, with card 12 being slightly too green and card 13 being nearly spot-on with maybe a touch much in the red direction. 13 definitely is the closest to "True Yellow", though.
i remember watching one of these kinds of videos when i was a kid on my ipod, video after video i came to find out that it wasn't yet possible. this is a dream come true. now i just got to find 300$ somewhere
I have a theory lately, about display technology: I have a feeling we're going to break out with some new form of light emission that can isolate different wavelengths independently, instead of us relying upon the typical (W)RGB-LEDs. My other theory is about some infinitely scalable displays. Think about something that is no longer a "screen" with discrete pixels, but rather everything is in proportion, and that you could have infinite (within the optical camera zoom capability) resolution for given images. No more "defined" resolutions, just something fluid to fit the screen size.
The black book makes it green because most blacks are really just dark blue. Yellow and blue make green.... Cool video, I learned a lot. Thank you for your time and effort.
17-19 look the most yellow, with my eyes on my screen. It down the hallway definitely looks very yellow (though you color corrected that) 12-14 still look kinda green to me. 1-3 look the most green. 23 is the most orange, starts getting red-orange after that
I once touched a plasma ball with a razorblade held between my thumb and index finger. Never again. The blade charred holes 1mm deep where the blade was touching my skin. Actual ash came out of the holes. It healed up in a few weeks because the holes were small, but be careful with plasma balls!
I would say that 12-16 are the only true yellows, with 15 being the best but my screen's color balance may be off. When shown next to 4 and 23, 12 looks perfectly yellow to me.
On my Samsung OLED phone on vibrant settings, I would say 15 or 16 would be "pure" 'emoji face' yellow, but around 13 I would still call yellow... More like highlighter yellow or slightly under ripe lemon yellow.
13 is a very pure yellow by my eyes on my screen
yup me too
Same, 13 on my QD-OLED monitor.
11
Same, I am in my mid 20s though
I concur, pretty much bang on
"Hey, let's send our cutting-edge secret laser to this youtube guy, without an NDA or anything."
That's the real miracle.
Yeah because its not at all cutting edge and its not a secret that yellow is between 560 and 590nm. There is no need of "searching for 25 years for the right wavelength". Science behind light is already fully cracked and one second of googlesearch away :D
@@nicoschroeder5379hey, you understand that you can't just turn a knob and get a laser at any wavelength, right?
How could you have watched this video and formed this opinion?
@@nicoschroeder5379 Tell me you haven’t watched the video without telling me you haven’t watched the video. He said it was cutting edge technology after he tested the infrared values considering that none of his other lasers did that
Since when NDA stopped anyone?
Oh, no, it isn't secret. If you search, you wil find you can buy one now for a few hundred dollars.
You ever stumble across a video where you pretty much know nothing about what they’re talking about,
but you have enough generalist knowledge to completely appreciate every single second of it?
This is both humbling and very enjoyable. Thank you for sharing your excessively nerdy passion with this exceptionally passionate nerd ❤
This really made me a bit emotional. The color correction felt like seeing something that shouldn't exist. Something about the awesome golden light just moved me. Thank you for sharing this.
Wtf?.....
10 through 15 looked yellow to me, with 12 or 13 being the "most yellow". Before those, I'd call the colour "green", and afterwards I'd call it "orange".
I feel the same
100% agree
12 and 13
Same here
maybe i’m weird but i would have said 8 or 9 is yellow
same, I could agree to 9 being a slightly green yellow but anything below that is neon/lime green. Similarly I could call 16 a dark yellow but anything above that is just orange
13 is the purest yellow
-Yeah that's when green hits 255 and red is 245 so its not pure its slightly green.- comment is deranged and not true.
@@crusher9z9so which one is? 14?
@@athmaid no 13 is still purest its just NOT PURE.
13 was 255r and 255g 12 was 245r and 255g
With a true color screen. 12 has hints of green. 13 and 14 were more true yellow color. 14 has hints of orange though is a typical car paint shade of color.
Hey, fellow hobbyist here. I'd recommend punching out one of the diffraction grating caps, or going a step beyond that to add a glass diode window. The collimation lenses on these newer yellow-gap lasers have a thin coating on them that is very easy to ruin by trying to clean them or even just by dust. Nice review!
rarity define value, no one cares about the red lasers that are most available but yellow is the rare one
@@Science-Vlog What? What did that have to do with OP's comment?
@@ghoulishtheories7979 nothing really
i heard about some students at a university in Australia making a true yellow LASER many years ago... cool to actually see one. thanks for the colour correction😍👍
So happy I found this. I have two high power 589nm Dragon Spartan lasers that are absolutely gorgeous but Ive been patiently waiting for something like this!
Whats the Watts on it?
Spartans in that wavelength typically reached about 50mW@@the_luminary
We need to collaboration with the slow mo guys
Was thinking that as well!!
what would they do with it? :O
When i hear "high speed camera" my brain hears "slo mo guys" 😂 lol
@@mikayla_collie they have high speed cameras capable of capturing any potential pulsing of the laser
@@mikayla_collie If you have a laser with 20,000 pulses per second, slo mo guys have cameras which can easily go past that framerate and track the pulsing.
It's nice how you put the safety warnings right in the start of the video.
Whoa, we still have a ways to go with perfecting screen and camera technology. I've never been so intrigued by the color yellow, as a fan of green myself.
Team 13 is superior to 12.
13 looked the most yellow to me. Even more so when seeing the grid with all the colours together.
14 got flashbanged by my white keyboard writing this lol
If 14 looks right to you you might need to drink more water. 😉
@@Chicky_Lumps You do realize that different displays have different color accuracy right
@@jamiealeksic8428 That is true actually
@@jamiealeksic8428 Then they should find out how to adjust *and calibrate their colors, at least roughly. Both my monitors 13 is a perfect yellow. an HP whatever and a LG IPS display.
@@jamiealeksic8428exactly this. I have two cheap monitors at work, the main one is less red than the secondary one, so 13 looks greenish on it, and 13 looks pure yellow on the other one.
this is incredible. i have been wanting to see a yellow laser light for such a long time. amazing work my friend
Thanks for the color correction. That seemed so green. Congrats on the find and excited for the next one! ❤
Congratulations. This is truly a phenomenal achievement.
Related: used to set up video walls back when they were CRT and then dlp. No matter the customer there was at least a man day worth of time teaching color science and theory. The questions were always why doesn't this look as good as they do on TV/ magazine. And it looks good here now but when I walk over here the colors are all wrong again.
Cool part of DLP was they always added more support colors to the color wheel, cyan, yellow, magenta, etc... Cool stuff outside of the ghosting effect when you moved your eyes :D
9:10 no you don't, you just need a rotating mirror and a photographic camera.
Make the beam move fast enough and with a long exposure shot you'll photograph a dotted/dashed line.
Also, the bit about the "which color looks more yellow" just confirmed to me that my main monitor is completely out of calibration, and my secondary Dell monitor is much more accurate.
Was about to comment about the "long" exposure.
Or get some photodiodes and a (nowadays very affordable) oscilloscope.
That works, good idea. I wouldn't suggest a long exposure - the shorter the exposure the higher the frequency you can capture whereas the longer the exposure the more accurately you can measure leading to a trade off. But absolutely moving the laser at a consistent (preferably high) speed would allow a high frequency pulse to be detected and all relevant details measured with reasonable accuracy by a lower frequency camera. A spinning mirror would offer that (with some line length trig needed). Again, great idea. - From a random postgraduate physicist.
I don't have a good mirror handy. I do have a fidget spinner. I would just spin the whole laser.
My front surface mirrors have issues that would distort the beam. (In other words, I didn't store them right.) Other mirrors will have an annoying second image.
@@splitprissm9339 Yeah, at 20 kHz, pretty much any modern photodiode/oscilloscope combination would work, even the $20 scope.
What an event to celebrate! There's little pure yellow in Nature though, although that's no reason for us not to view it, as some other species may do. And so, I fancy about the time, at which, by gene-manipulation or device-implantation, we'll come to see all of the primary colours - and in great detail, so that, in sixty-or-so years, we shall be able to detect violet, pure blue, green, yellow, scarlet and maroon - or more. But, in any event, it would sure be worth waiting for
One of the most fascinating videos I've seen on TH-cam. Subscribed! I love shit like this. Also 12, 13, and 14 but 13 being the most yellow to me.
This was an incredibly interesting what of conveying this thing which CANNOT be conveyed with your cameras, our screens, and the fact that all of our perceptions - and INTERPRETATIONS - of color are different!
You managed to solve all of these, by telling us that, to your eyes, the laser most closely matched the 12 sample. And while we have no real confirmation for ourselves, you've basically narrowed the gap down to... "your credibility and our willingness to trust in you," which is quite a bit easier than... just assuming all of those other variables are somehow magically correct for each and every viewer.
Furthermore, the spectrometer helped! And the additional complication at 5:00 was fascinating!! I love when videos are this thorough
I never thought about yellow lasers, but your quest for one got me excited.
My dream is a true blue, so now I am excited again! Best of luck with that.
Also, 12 was the yellowest yellow to my eyes.
I would love to see these new colors added in show lasers. The richness of color is unmatched compared with RGB
Biomedical applications:
Flow cytometry: 573nm lasers are used to excite fluorescent dyes in cells, allowing researchers to analyze and sort different cell populations based on their characteristics.
Confocal microscopy: This technique uses lasers to create high-resolution images of biological samples. 573nm lasers can be used to excite specific fluorophores in the sample, providing detailed information about its structure and function.
Ophthalmology: Yellow-green lasers are used in some retinal imaging and treatment procedures.
Other applications:
Holography: 573nm lasers can be used to create holograms, which are three-dimensional images created with light.
Laser light shows: The yellow-green color of 573nm lasers makes them suitable for creating visually appealing laser displays.
Material processing: These lasers can be used for micromachining and marking certain materials.
Metrology: 573nm lasers can be used for precise distance measurements and other metrology applications.
Yellow LED with resistor in parallel should clarify the pulsing question, if connected to oscilloscope.
Works fine. On old crt scopes you can make the dot “jump” over the
LED when putting it in front of its track.
Clever. Agreed.
Can you elaborate a little? I'm familiar with circuits and oscilloscopes, but I don't quite follow how this experiment with clarify the question.
@@Cyberguy42LEDs also function as very inefficient photodiodes, so if you pulse light into them and hook it up to an oscilloscope you’ll be able to see the pulses. Not sure if they’re selective for colour though, but if they are this’d work very effectively.
13 was the square that seemed to me to be the shade closest to yellow to my eyes. 😊
I would say 14, 13 is still slightly green for me.
EDIT: looking at all of the colours it is 13 that is the most yellow
Tally Hall reference?
for me 13 is too
@@Gregory_12 no, I will look that up now
Man, that tv company that had a YELLOW diode set with red, green, and blue diodes too was crazy and now I wish they had caught on.
i was between 13 and 14 but that may be the color on my monitor. this is seriously impressive and had never thought about there being a yellow gap before.
for me 12-16 is the yellow region, with 10-11 and 17 being the transition regions
it's hard to say which one is theb"most yellow" because 12-13 is lemon yellow and 15-16 is the sand yellow
I can totally understand people thinking lemon is the true yellow, but I was taught that sand color in kindergarden
New Brainiac75 video lets GOOOOOO
Like your enthusiasm - I always feel great when releasing a video. Perhaps because weeks of work and focusing on one subject is finally concluded ;)
@@brainiac75 lasers make me feel good as well
number 15 was the yellowest to me
4:47 holy crap that's awesome!!
From what I remember from my practical physics lasers courses, you can get yellow by using non optimal angle on the OPO (optical parametric generation) crystal . I don’t know the efficiency but it should be pretty low compared to green if you use a 1064 nm laser, but with the crazy power/price we can get nowadays maybe it would be enough to get 20mw of yellow output at a reasonable price.
Maybe the large metal casing is to dissipate more efficiently the waste heat.
There's no "yellow gap" in camera. The only reason colour reproduction failed is that no tristimulus camera implements human metamerism. Every camera uses colour profile to produce realistic output but it can only do that for some subset of spectral distributions and it so happens that your camera's profile kills pure yellow.
In principle there is nothing preventing same issue with red, green and blue since all of them are recorded as a mix.
Aren't CMOS sensors with RGB filters, ergo non of them are passing monochromatic yellow? Most of the time yellow is non monochromatic, it is a spectrum from white light deflection, therefore red and green are "flying in" at the same time.
@@MariuszChr I think you are correct. May be biased towards because 571nm is closer to the center wavelength of the g filter.
It's not really a camera issue entirely, with the proper sensor it can capture any visible light color (just as their spectrometer can, just depends on the sensor though). The bigger issue is with the screen itself. Most monitors use the sRGB color space and things with nearly singular wavelength spectral distributions like lasers will resolve to colors outside this gamut. As such these colors will end up as imaginary colors in sRGB and will clamp into the gamut which will distort their hue. With a proper theoretical monitor that had perfect coverage of the entire gamut this color could be displayed properly, and in time monitors with say Rec 2020 coverage will cover most the perceptible human visual gamut anyways and won't distort colors quite so much, so this is mostly just an issue with current 90s-era non-WCG monitor color standards beyond just the sensor's ability to capture it.
"Aren't CMOS sensors with RGB filters, ergo non of them are passing monochromatic yellow?"
That's false. Every non-specialized image sensor has sensitivity to all wavelengths between 400 and 700 nm.
"It's not really a camera issue entirely, with the proper sensor"
You did not read my comment. You do not understand what I say but you also do not ask questions.
"The bigger issue is with the screen itself."
There is no issue with screens. Any sRGB-calibrated screen is capable of accurate colour reproduction of any correctly recorded colour within it's gamut.
Cameras on the other hand cannot ever be calibrated except for a subset of spectral distributions. A set of spectral distributions might produce same colour for a human but it will get mapped to different colours in the camera. The characteristic which defines whether it happens or not is "metamerism".
@@ПётрБ-с2ц You didn't read what I said. This yellow laser color is fundamentally outside the sRGB gamut, and therefore is impossible to display on any consumer monitor which is likely part of why it shifts to green like this. You probably do not fully understand how color works in computers if you do not think the monitor is an issue in this case.
This has nothing to do with "metamerisms", I do not think you again understand how color works in computers. Spectral data once measured can be converted to human-recognizable colors via color-matching functions that have been measured based on human perception. All computer color is already based around these "metamerisms" and other perceptual illusions with saturation, contrast and etc (with varying degrees of accuracy depending on the model use).
Of course, the camera is not a spectrometer so the problem may also be that indeed something with how it measures the color, but it does not really need to know what the exact spectral distribution is to know what color it is if it has a conversion to these other established color spaces. It's not going to be perfect but yeah it clearly works well enough when designed properly as cameras look quite accurate to what we see otherwise.
The first one I thought of as "that's yellow" was 12, but then 13 popped up and I instantly changed my answer.
I should note that I've got a calibrated, Pantone certified OLED display. Other displays, tend to be red-shifted from factory to (over) compensate for the blue phosphor in the backlight because people generally prefer warmer light sources. In full saturation with no context, it would make sense that "yellow" would be perceived a frame or two sooner than on a display intended for real-world color accuracy.
i don't even know why i clicked on this as i am colorblind, but i still enjoyed it
Had no idea a Yellow lazer was so rare. Very kewl 👍
It makes me think of a light bulb that emits brown light.
That's not necessarily impossible you just need a near infrared red wavelength that you can see that interferes with a wavelength of a yellow. Both of which you have to be able to see. Its like using noise canceling.
Well there is no brown light, there is yellow light. It’s more like a blue led, it took way longer to invent than red and green.
@@jaredf6205 yellow is not brown. Brown is dark orange.
@@crusher9z9 jaredf6205 was pointing out that it doesn't really make sense to compare a yellow laser to a brown light emitting bulb since 'brown light' does not exist (the color brown is merely how our brains interpret a combination of lights with certain wavelengths). In contrast, yellow light does exist, so while a yellow laser may have been quite difficult to develop (as was the case with the blue led), there was at least reason to believe that it was possible.
@Cyberguy42 brown is one wavelength. Orange. In order to make brown light though you need to do some shenanigans with destructive interference, like about half of the frequency as the orange light used. Probably.
Great work👍
Thank you very much - more to come!
I miss your videos about laser
Glad you like them! I would say I quite often release a video about lasers - one of the main topics of my channel and always visually spectacular compared to magnets ;) More laser videos to come in the future!
@@brainiac75yeah the laser vids are also my favorite. We need more laser content in TH-cam!
Hurray for Yellow!
15 looked to be the most yellow looking banana like
It's like there's some buggery going on here! First that laser definitely appeared green to me but then after going through the numbered gradient exercise and seeing its beam together with the real green one, it correctly appears yellow throughout the rest of the video 🤔
edit: The buggery is software colour correction apparently :D
I think he mentioned color-correcting the video so that it appears like it looks IRL.
@@delphicdescant Your eyes can also adjust white balance so this effect can happen IRL. This is visible when aligning large arrays of multi-wavelength red diodes. 637 and 655 look basically identical at first. 30 minutes later after aligning 15-20 diodes or so (not even half way.. :() the light red looks pink and the dark red looks red...
Also had weird stuff happen with green or red outputs then going into a white light situation, it shifts dramatically.
As someone who is colorblind. 1 through 13 looked pretty much the same. I could see all of them being called yellow.(though seeing the comparison later on side by side, 4 compared to 12 looked very different)
But 14 had a very obvious shift to not being yellow and every color after that.
13 is pure yellow to my eyes on an iPad Pro. 12 is almost the same, looks like you have a really yellow beauty here :)
13
Your brain tries to compensate, so your perception is based on the previously viewed colors. Maybe my choice would be different if you went from red to green?
Good work sir, currently doing a project myself, if it works it works, if not we can always scrap and try again.
I think they are achieving the frequency by employing Doppler shift. I also believe they are accomplishing this in one of two ways:
#1: get as close as possible with traditional, off the shelf technology and then direct the beam into a rotating mirror at a specific angle of incidence. The resultant "reflected light" would have it's wavelength lowered by a predictable (but more importantly) TUNEABLE amount
2: To obtain the needed Doppler shift without the need for bulky spinning mirrors, you could use a mirror mounted onto a piezoelectric material like quartz, and then all you would have to do is tune the frequency until you get about double the yellow frequency. Once you are at double the desired frequency, you simply intermittently interrupt the beam so that it appears to be half of what it actually is.
I'm probably not describing it in a way that makes sense but i can visualize it in my head.
10-13 is what I'd call yellow, with 12 being a very strong yellow. For me it felt like quite a noticeable transition from 9-10 (green to yellow), and 13-14 (yellow to orange).
Laser pumping is such a strange and cool phenomenon. Reminds me of how they have to double-pump the diodes at the National Ignition Facility. So I love the investigation part of this video.
I mean for a very long time blue LEDs were thought to be impossible. Everyone tried and failed. It was once believed LEDs would never light kitchens, bedrooms, or especially not television screens, etc. Then a researcher named Shuji Nakamura, working for a small chemical company called Nichia, came up with a plan to save the company he was working for. It was struggling to compete in the market for manufacture of red and green LEDs. He modified and made his own equipment and eventually found the path and created the worlds first blue LED. Ushering in the world we know today of LEDs lighting most things, brighter and using less energy than ever before. While I do not know the story or process for how the yellow laser came about. I'm positive the story is very similar. Lots of time, research, development and motivation surely brought about the new 573nm laser. Necessity is the mother of invention and physics are awesome. For me, actually 10 or 11 was the most yellow. But early on I almost wanted to say 9 or 10. Though looking at them all on the screen at the same time, 9 is still pretty green to me.
Can only imagine what could've been accomplished if the time spent on this was put toward something genuinely beneficial
Yellow lasers have existed for some time. I've had several yellow laser eye procedures done.
A couple more interesting phenomena that can be observed with 573nm is red shifting during scotopic conditions. The 573nm will look purer yellow in darker conditions than in lighter. And vast colour perception changes depending on what reference source is used. For example use that 558nm next to it and the 573nm will look like 583nm. You don't have too have the reference source on when observing the 573nm either. Your eyes need to readjust so you can turn off the reference source and use the 573nm straightaway afterwards and observe a change. This also works in the other direction when using a longer wavelength as a reference.
Cool laser. They also say in the description that right at turn on green may be seen before it goes into yellow. Definitely a cool laser though
I suspect the reason it appears green is that sensors with a Bayer arrangement (which sony use) have two green pixels for every red or blue.
Don't forget that the eye constantly makes white balance adjustments and depending on your environmental lighting the laser could look more green (warm ambient light) or yellow (cold ambient light). Same goes for the white balance of the camera. Try setting the White balance of the camera to 3600K, 5000K and 6400K and film the laser light.
A lot of people are saying 13, which I can sorta understand, but I personally feel like 15 is the most yellow, while 12-14 feel a tiny bit greenish to me and 16+ seem too orange.
If you have orange, try reducing the temperature of the semiconductor to a range where it outputs yellow.
for the yellow test, I was using an old TV for a monitor and 15 looked the most yellow (though it got hard to differentiate between 12-14) then I switched to another monitor and there's clear separation between all of the, with 13 definitely being the most yellow
12 was what popped out to me first *without* rewinding, but 13 is the pure yellow according to RGB
5:34 your car collection made my 11 year old's jaw dropped!!
11-17
12 is yellow, but on the green side of yellow. But definitely yellow. I would call that 'neon yellow' because of how bright it is.
There are twice as many green pixels as red or blue in cameras! The pattern is called a Bayer filter. That's probably why it skews green in video
In my high school physics class my professor brought out tubes of florecing gasses and we analyzed them with spectrometers to determine what elements were in them. My professor also brought out a tube that floreced tried yellow and told us about how if you get 2 mutated x chromosomes there is a chance you can see true yellow as an entirely unique color, having genes that encode for cones in your eyes that can see yellow! It's just as different to these women as green and red are to you and me and they see true yellow as different than our yellow!
Ooh nice cars too! I see a Ferarri F40, a Dodge Viper, a Porsche 911, a Porsche Boxster, a Lamborghini Murcielago, a TVR (I think), a Nissan 350Z, some more Ferarris that I can't quite ID.
I never hated colour blindness more than i do now. That said i've always heard the fabled yellow lazer is nearly impossible... truly legendary stuff. I love you.
Well, I love this video at least!
The reason is that our eyes combine red and green to produce yellow, whereas 585 nanometer light is not very stimulating to either the red or green sensors in our eyes, or some byproduct of our color vision processing pipeline.
Definitely 13. Every one before that seemed a bit green but 13 was immediately recognizable as pure yellow.
14 for me but it's down to my perception. My screen is insanely accurate.
To me 13 looked the most yellow, but 12 was close enough if i've seen it just alone to call it yellow. Nice job color correcting, i imagine it wasn't very easy
And suddenly I can hear MC Frontalot’s ‘Yellow Laser Beam’ song in my twisted mind.
Really interesting. How they did it…If they are using a higher infrared diode, maybe they have a down step transformer of some kind, with a harmonic amplifier to create a lower peak frequency, kind of like pulling out a real bass note with a high string harmonic on instruments. That would be my guess.
Finally, a perfectly hydrated laser.
It must be glorious to be able to perceive the difference. Some things I will never see.
12 is the purest yellow, with 11 being the next contender. When all shown in the screen 1-10 form a greenish group, 11 and 12 are independent, 13+ form a reddish group.
I remember (I think) Sony was experimenting with putting a yellow LED in their TV's to make up for the loss of the color when viewing movies. Nothing ever came from it and they still only put RGB in the screens.
The power of mustard in the palm of your hands
12 looked the most yellow to me when they were going by one at a time, but then you displayed them all on screen at once and it looked like 13 was the most yellow.
12 is with a green hue but 13 is what pure yellow would mean to me in this context
15 is the purest yellow for me. Or 14. 12 is "yellow" but clearly has the sensation of green light in there as well. 16 is where it's less pure yellow and more orange to me.
It looked the most yellow between cards 11 and 14, with card 12 being slightly too green and card 13 being nearly spot-on with maybe a touch much in the red direction. 13 definitely is the closest to "True Yellow", though.
ive always wanted a true yellow laser too!!
i remember watching one of these kinds of videos when i was a kid on my ipod, video after video i came to find out that it wasn't yet possible. this is a dream come true. now i just got to find 300$ somewhere
12-13 is my yellow! Nice to know you got that pesky gap filled!
I have a theory lately, about display technology: I have a feeling we're going to break out with some new form of light emission that can isolate different wavelengths independently, instead of us relying upon the typical (W)RGB-LEDs. My other theory is about some infinitely scalable displays. Think about something that is no longer a "screen" with discrete pixels, but rather everything is in proportion, and that you could have infinite (within the optical camera zoom capability) resolution for given images. No more "defined" resolutions, just something fluid to fit the screen size.
That LASER beam reminds me of what my pee looks like after drinking too much Mountian Dew or Red Bull
Immensely satisfying, though I have to say that amber laser is absolutely gorgeous.
10-12 are proper yellow with 12 being the most intense yellow problably, from 13 it gets a shade darker and so on.
The black book makes it green because most blacks are really just dark blue. Yellow and blue make green.... Cool video, I learned a lot. Thank you for your time and effort.
One time I was scribbling with a black Crayola marker, and the black looked like a very dark green color.
17-19 look the most yellow, with my eyes on my screen.
It down the hallway definitely looks very yellow (though you color corrected that)
12-14 still look kinda green to me.
1-3 look the most green.
23 is the most orange, starts getting red-orange after that
I once touched a plasma ball with a razorblade held between my thumb and index finger. Never again. The blade charred holes 1mm deep where the blade was touching my skin. Actual ash came out of the holes. It healed up in a few weeks because the holes were small, but be careful with plasma balls!
9-17 i would consider yellow. 13 seems the most yellow to me
I have no idea who you are or what this is for but I'm all with it
Congratulations. I thought you were going to say it wasn't correct. Nice to know there is a yellow laser out there.
nice! and power output is perfect too
I would say that 12-16 are the only true yellows, with 15 being the best but my screen's color balance may be off. When shown next to 4 and 23, 12 looks perfectly yellow to me.
On my Samsung OLED phone on vibrant settings, I would say 15 or 16 would be "pure" 'emoji face' yellow, but around 13 I would still call yellow... More like highlighter yellow or slightly under ripe lemon yellow.
12 to 15 is what I would consider yellow under normal conditions, but this would be influenced by environmental factors.