Can't believe I haven't watched this earlier. Thank you , it was absolutely fascinating. I *still* can't understand how the hologram can reproduce the interference pattern depending on the *angle* from which it's viewed. This is the first time I've ever seen someone demonstrate that every point on the hologram contains the entire interference pattern for a particular angle. Amazing.
Jeri, you sound like a science teacher every time you do these. But it's still awesome. I always though you belong somewhere teaching science and creating new metal working magicians of the future.
We had a whole store of hologram photos at the local mall (woodfield), would sell for anywhere from $20 up to thousands. I remember all the walls being black, and they had really bright halogens pointing at the walls giving them the best refraction possible. They even had a few that would animate as you scrolled by. I too am fascinated by holograms.
Something you might not know. If two or more object are recorded in the hologram viewing angles where the reference beam can't reconstruct both object causing one object in the shadow of the other object to disappear from sight.
@kirvesvarsi The optics probably vary from this. It wasn't my intent to draw the exact details of the hologram setup. There are other components to adjust the beam intensity too not shown.
i've been watching videos about holograms all day, and this is the oldest one I've seen so far. it is also the most informative, which shows the decline of humanity's standards.
@diginess78 There has been research into realtime hologram displays, but everything I've seen is either physically large or only writes on image at a time on a plate.
@wel97459 It wasn't too hard to make one that worked a little, but I never got one to work this well. I think we were moving around in the room too much as it exposed.
Even more fun thing about holograms (especially the reflection ones) is that once you turn them backside, the volumetric image will be wrapped inside out. And if you will make a hologram of this inverted hologram, and turn it backside as well, you can shift the distance plane to the image (an object which appeared to be behind glass, will now pop outside the glass)
it's absolutely incredible how every piece of the emulsion on the glass contains an entire 2D view of the entire scene. It goes to show that with diffractive patterns like this one could optically store far more information than has been done with traditional film etc. I wonder how the possible information density compares to that of a hard disk or magnetic tape?
so, i'm guessing that the 'fringe patterns' are kind of like the comb filtering you get if you mix two identical/nearly identical audio signals together and bring one slightly out of phase? and that they are caused for the same reasons and in the same way?
The interesting thing about holograms is that you are recording the interference pattern between the two waves. Another property of recording an interference pattern and not an image is that the pattern is spread over a larger area. If you happen to have an exposed broken plate, you will not end up with a fractured hologram but one that you can still see the entire image in, only smaller and maybe with a lower resolution. Could you make stereo 3D with two plate sections and a beam splitter?
is the effect that cause the image to be of difference size when illuminated by different wavelength the same as the effect that cause chromatic aberrations in photography ?
@TheSolarmike look up peppers ghost effect. Basically you have you tv horizontal to the viewers, then you have a piece of glass at a 45 degree angle from the screen, then when a picture or video is displayed on the screen at the top it appears to be floating behind the glass.
I love the idea of polarisers - in fact isn't the laser pointer light polarised already? So it might work by shining two laser pointers at the same point on the laser, one rotated 90 degrees to the other?
nice, what about holographic stickers, is it just a hologram with reflective background? I tried shining a laser on it but i'm not sure if I can get a projected image
Neat! I made a couple of holograms at a summer school program when I was in high school in the mid-nineties. We used HeNe lasers at the University of Joensuu (nowadays University of Eastern Finland). This video brings back memories.
That was awesome. But I'm still excited about the EDM drill. If one could make one of those to drill, say, 1/4 of an inch, and make it magnet mountable, he or she could sell one to every automotive machine shop in the country. Because they break off bolts from time to time, and they occasionally send them to a shop with an EDM Sinker to erode out the broken bolt. Sha chow!
I'm being a bit pedantic here, but you might want to check if the optical details of the beam spreader/expander are correct in the sketch of Kevin's setup. Otherwise very nice video ;)
would be interesting to use 3 lasers (red blue and green), and be able to create a color-accurate hologram (though i guess it'll require 3 hologram plates too for the different colors...)
I still don't understand how complete 3D image information being recorded in every tiny spot of the film, that mean if you cut the film to 1000 pieces, you will have 1000 complete 3D images?
Not necessarily complete, but each will show the object from its own original perspective, like 1,000 pieces of a window whose gaze onto the outside world is frozen
And I never knew about the 2 colors and glasses makes a 3d image :D now I want 2 color lasers, some holograms and maybe eye protection because Lazor show inbound :P
I know this video is 10 years old, I hope you're still checking these posts, I see that you're shining 2 different lasers (red and green) at the hologram, Since there is a difference in scaling, you said a solution would be to use the same wave of light, and polarizers on the way out, could you possibly dumb that down for me? I'd really like to understand this, I would really appreciate it.
Hahaha! Same here! I was recently intrigued by holograms, and I only found 2 other useful videos. Was happily surprised to stumble upon a Jeri's video!
The problem is, that the term Hologram got extended in the years. There are people who might even call a simple reflection (Pepper's ghost) a hologram.
Can't believe I haven't watched this earlier. Thank you , it was absolutely fascinating. I *still* can't understand how the hologram can reproduce the interference pattern depending on the *angle* from which it's viewed. This is the first time I've ever seen someone demonstrate that every point on the hologram contains the entire interference pattern for a particular angle. Amazing.
holograms are like the most oldschool futuristic thing ever, im amazed more people aren't fascinated with them
Best video on holograms I've ever seen. Probably because you didn't dumb it down.
Putting 3D onto a 2D medium and still being able to see the 3D scene as if we could navigate in-front of it is pretty amazing.
@sonicase They apply a foil to the back, so the light bounces back.
@fronkenpoop I've seen similar processes for pressing CD's and the old RCA capacitive move disks. I think the RCA process used a nickle master.
Jeri, you sound like a science teacher every time you do these. But it's still awesome. I always though you belong somewhere teaching science and creating new metal working magicians of the future.
Sooo awesome. it is incredible how much information is stored at each point of the film.
We had a whole store of hologram photos at the local mall (woodfield), would sell for anywhere from $20 up to thousands. I remember all the walls being black, and they had really bright halogens pointing at the walls giving them the best refraction possible. They even had a few that would animate as you scrolled by. I too am fascinated by holograms.
@craigfromnewcastle This type of hologram exposes the plate all at once. More advanced holograms will move the subject and expose the plate in steps.
@fronkenpoop Did they strike it from the aluminum side?
@morto360 It's a hobby. It feels like play to me. I also stumbled onto the 3d projection part too(not that someone hasn't already done this)
Something you might not know. If two or more object are recorded in the hologram viewing angles where the reference beam can't reconstruct both object causing one object in the shadow of the other object to disappear from sight.
@kirvesvarsi The optics probably vary from this. It wasn't my intent to draw the exact details of the hologram setup. There are other components to adjust the beam intensity too not shown.
@InspiredChaos I wonder at what point the image disappears if you keep dividing the beam size of the laser.
@SuperFinGuy I've never done a circular hologram. The ones I did with Kevin used a wide beam that illuminated the subject entirely.
Hologram goodnes, explained in 5 minutes. Thanks so much, Jeri!
i've been watching videos about holograms all day, and this is the oldest one I've seen so far. it is also the most informative, which shows the decline of humanity's standards.
@diginess78 There has been research into realtime hologram displays, but everything I've seen is either physically large or only writes on image at a time on a plate.
Great video! I've always been fascinated with holograms too, and now have a deeper understanding of the idea behind them. Thanks!
Sweet demo and instruction!!! Just what I needed to see to illustrate the ideas I was reading about earlier tonight. Thank you for sharing!!
@wel97459 It wasn't too hard to make one that worked a little, but I never got one to work this well. I think we were moving around in the room too much as it exposed.
Thanks for making me finally understand how holograms work!
@SuperFinGuy I think that is how they make the circular holograms.
thats amazing! I never knew that a whole image was stored at each point! WHOOAAAA
Even more fun thing about holograms (especially the reflection ones) is that once you turn them backside, the volumetric image will be wrapped inside out. And if you will make a hologram of this inverted hologram, and turn it backside as well, you can shift the distance plane to the image (an object which appeared to be behind glass, will now pop outside the glass)
it's absolutely incredible how every piece of the emulsion on the glass contains an entire 2D view of the entire scene. It goes to show that with diffractive patterns like this one could optically store far more information than has been done with traditional film etc. I wonder how the possible information density compares to that of a hard disk or magnetic tape?
so, i'm guessing that the 'fringe patterns' are kind of like the comb filtering you get if you mix two identical/nearly identical audio signals together and bring one slightly out of phase?
and that they are caused for the same reasons and in the same way?
The interesting thing about holograms is that you are recording the interference pattern between the two waves. Another property of recording an interference pattern and not an image is that the pattern is spread over a larger area. If you happen to have an exposed broken plate, you will not end up with a fractured hologram but one that you can still see the entire image in, only smaller and maybe with a lower resolution. Could you make stereo 3D with two plate sections and a beam splitter?
Wow, this brings back memories!!! I've always wanted to set-up a holography set-up when I was a teenager. Where do you fellas get the film from?
is the effect that cause the image to be of difference size when illuminated by different wavelength
the same as the effect that cause chromatic aberrations in photography ?
Thank you for taking time to teach😁
@TheSolarmike look up peppers ghost effect. Basically you have you tv horizontal to the viewers, then you have a piece of glass at a 45 degree angle from the screen, then when a picture or video is displayed on the screen at the top it appears to be floating behind the glass.
Woah! The laser pointer demonstration did it for me! Thanks!
I love the idea of polarisers - in fact isn't the laser pointer light polarised already? So it might work by shining two laser pointers at the same point on the laser, one rotated 90 degrees to the other?
nice, what about holographic stickers, is it just a hologram with reflective background? I tried shining a laser on it but i'm not sure if I can get a projected image
Thanks for explaining all of this! I've always wondered how holograms are made.
WoW great vídeo! Thanks Jeri!
@AmazGraz I bet it can be done!
I though hologram do not need laser to view like the one on your credit card. Btw, this is the best explanation video I've seen.
Ultra cool. Thanks, Jeri.
Neat! I made a couple of holograms at a summer school program when I was in high school in the mid-nineties. We used HeNe lasers at the University of Joensuu (nowadays University of Eastern Finland). This video brings back memories.
Absolutely fantastic well done
Hi Jerri,
Is it possible to have more info about razor blade setup?
That was awesome. But I'm still excited about the EDM drill. If one could make one of those to drill, say, 1/4 of an inch, and make it magnet mountable, he or she could sell one to every automotive machine shop in the country. Because they break off bolts from time to time, and they occasionally send them to a shop with an EDM Sinker to erode out the broken bolt. Sha chow!
this is absolutely remarkable
Thanks for the video. I had read Joseph Chilton Pearce as he described this but until now was not sure as to how it all worked.
Very nicely done! Thanks for sharing this. :)
Say do you teach? Excellent professional explanation! Thanks!
@AmazGraz A Mad scientist!
I'm being a bit pedantic here, but you might want to check if the optical details of the beam spreader/expander are correct in the sketch of Kevin's setup. Otherwise very nice video ;)
very nice demo i enjoy that, i want to try to make a hologram at some point
Hi. I believe that a transparency laser printer film would work, is that correct? Thank´s or What films do you use and where can I buy it.
Recording an image on the film only works for 3D objects? or I can "scan" a 2D drawing and record it on a film as a 3D image?
You can do multiple exposures of 2d objects. Many computer generated holograms are made of slices of 2d images exposed on the plates.
This is so awesome thank you for the awesome upload!
Holograms are awesome. I still have a few about, somewhere...
Though some UK credit / debit cards have little holograms on them.
.
&eB
Is it possible to buy these plates with pre-made images?
Hi Jeri,
Greate video. I have a question.
What happens if you break a glass with hologram ??
will we see all or only part of the picture?
Thx
you would be able to see the whole thing, if you can find the right angle
each break is a smaller copy of the whole thing!...
@markvergeer Nope. I'm just a nerd.
awesome.
If we ever take advantage of light computing, this would seem useful for symmetrical cryptography
This stuff is so ridiculous. Your fascination is with the neatest things.
would be interesting to use 3 lasers (red blue and green), and be able to create a color-accurate hologram (though i guess it'll require 3 hologram plates too for the different colors...)
@morto360 If I were a superior alien I would have given up on the human kind after seeing the jocks at my high school.
Great video.
That is SOo Interesting.!
Thank you! Thank you! Thank you!
Thank you :-)
I still don't understand how complete 3D image information being recorded in every tiny spot of the film, that mean if you cut the film to 1000 pieces, you will have 1000 complete 3D images?
Not necessarily complete, but each will show the object from its own original perspective, like 1,000 pieces of a window whose gaze onto the outside world is frozen
And I never knew about the 2 colors and glasses makes a 3d image :D now I want 2 color lasers, some holograms and maybe eye protection because Lazor show inbound :P
I know this video is 10 years old, I hope you're still checking these posts, I see that you're shining 2 different lasers (red and green) at the hologram, Since there is a difference in scaling, you said a solution would be to use the same wave of light, and polarizers on the way out, could you possibly dumb that down for me? I'd really like to understand this, I would really appreciate it.
cool
@jeriellsworth You *should* teach!
What do you want to be IF you grow up?
Science will never truly understand how holograms work.
lovely hands
@spektrum1983
Holy fucking shit!!!!! I just watched that!!!! Wicked crazy awesome!
I see your simi circular and raise you an iso diametric.
I watching this thinking.. "This person is really smart!" Then I read the name.. Oh, it's Jeri Ellsworth!! Umm.. YEAH! She's VERY smart.. lol
Hahaha! Same here! I was recently intrigued by holograms, and I only found 2 other useful videos. Was happily surprised to stumble upon a Jeri's video!
holograsm
this is old technology, that can probably be discarded. True volumetric 3d hologram technology:
1.Burton inc aerial 3d
2.helio display
The problem is, that the term Hologram got extended in the years. There are people who might even call a simple reflection (Pepper's ghost) a hologram.
Kids today have no clue what hologram is!
This is so awesome thank you for the awesome upload!