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- เผยแพร่เมื่อ 4 มิ.ย. 2024
- We Makers often use infrared light for their projects. Its main advantage also makes it sometimes hard to work with: It is not visible. This is what we will change today. We will measure its spectrum with a do-it-yourself spectrometer and build a wireless IR camera using a Raspberry Pi.
Links:
i-Phos Spectrometer: chriswesley.org/spectrometer.htm
IR-Camera: s.click.aliexpress.com/e/_9QzO8l
Diffraction Grating Slide: ebay.to/2DLhGdg
Raspberry Pi: amzn.to/2Y971Bf
3W IR diodes: s.click.aliexpress.com/e/bpcSC3J2
IR Lenses: s.click.aliexpress.com/e/b2ROVjtO
Power Bank: bit.ly/2JbQojT
Chris Wesley: / @chriswesley594
Supporting Material and Blog Page: www.sensorsiot.org
Github: www.github.com/sensorsiot
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Your lecture is a treasure with a tons of info , thank you so much for sharing
You are welcome!
Again with the great content! I'm sorting out how to set up multiple IR cameras for wildlife identification on a ranch. This was helpful. Thanks again Andreas
Glad it was helpful!
Great video Andreas, this is something ive been meaning to investigate myself so il most likely watch again and take notes.
Thank you!
Your videos are getting better and better! Keep it up, really cool and inspiring. Totally worth to be patreon :)
Thank you for your feedback and your support!
this IR camera for RPi is really cool. I am also impressed what sort of gadgets you can find at these Chinese webshops. Thanks for the video and especially for the trick with the camera!
You are welcome!
Bravo! What a fabulously interesting and useful video. The spectrometer using the fluorescent bulb as a source of known wave lengths to calibrate was so elegant and the results from that fascinating. I am a great fan of motioneye for wildlife studies using a raspberry pi Noir camera which gives great images in the infra red while remaining in total blackness in the visible. I had not realised that pla was transparent to infra red, suggesting some interesting projects. `Thanks for sharing!
You are welcome!
I had not heard of the i-Phos, it is a great idea,
I have messed around with I. R. and cameras in the past and still have one set up to look into black plastic cases for fault finding (it's nice when you can see what is wrong/identify parts in a device without even opening it)
I have a diffraction grating and a couple of spare hours today... Let's play!
Yea!
This episode serves several theoretical and scientific purposes.
1) It proves several physical laws that can be tested and applied by anyone (without a post secondary degree) and verified.
2) Illustrates how invisible light can be effectively *seen* .
3) Assist anyone interested in infrared technology how to analyze the quality of components necessary to develop security devices that must serve useful purposes. In fact, this is just the beginning of the exercise. In the laboratory, basic tests are not a replacement for the next step, the field. Field testing is where the real excitement begins. Spectrum noise comes into focus - literally.
As usual, another great episode by the guy with the Swiss accent.
This is why I liked this cheap camera. It can be made by nearly everybody
@@AndreasSpiess As you know, IR quality varies based on design, not just price.
I really love that hand that's used to point out things. Please tell me how you made it!!
i-Phos Spectrometer: Add to cart
Thanks for the tip!
You are welcome!
Very interesting. Many chemistry lab equipment uses spectrum finger prints based on known light sources to identify substances based on absorption and reflection.
I knew that. But doing it the other way round was new for me.
Cool. Nice ideas for Makers. There is a whole group of uv and ir photography. I wanted to mod my dslr once..
Thank you!
new graphical suite in this video, Great!
Speaking of the small portion of code at time 08:30: thanks to my partial color blindness (some shades of red and green are attenuated in my visual spectrum, this is why for me a red signal is NOT a danger signal :-)) The code line written in red is illegible for my eyes, I think however that it is the same replicated in the screenshot published in the same image at the bottom right.
Thank you for sharing your experiences!
I try to use visible markers for the color blind, if possible. But sometimes I forget it :-(
I totally agree, IR cameras are fun to play with. :)
My smartphone has a auxiliary IR camera and a IR flash at the front, it's not a high resolution but it gets the job done.
It has a germanium lens too, to block visible light and only allow IR.
I can take pictures and record videos with little bit of tinkering.
Wich Smartphone Model do you have? What have you tinkered?
Thank you for the information!
Fantastic project/investigation
Thanks for sharing .-)
You are welcome!
Another awesome video. Thanks
You are welcome!
If I sit in the front row do I avoid being asked questions?
Glad the lens worked out - handy having both day and night modes in one unit.
:-)
I love this channel and your projects!!
You can see the UV overlapping in your spectrometer into the IR band. Its very faint, but if you wanted to measure IR accurately you might consider adding a UV stop filter.
Thanks for the tip!
@@AndreasSpiess you’re welcome! The different orders of refraction overlap in that region, it just comes along with using diffraction elements. I am currently making a spectrometer like yours, encountered the same issue
Ich hör dir so zu und denk nur - du bist klasse! Wollte das mal los werden , byyye :)
Danke! Sehr nett.
Very informative, thanks
You are welcome!
Nice video as usual...
I have rpi IR camera...it had no two modes,worked right out of the box.
Does yours have a filter - shutter?
IR is great fun... many interesting small projects could be done..making invisible visible :).
I assume it has a shutter (because of this click). But I do not know.
You could got a 1080nm (laser) diode.... lasers for better calibration!
Also the "NOIR" in the "Raspberry Camera Noir", means it is IR capable, for the people who are too fearful to remove the IR filter...
I was going to say the same thing. IMHO its name is a little confusing, but means "No IR Filter". Somehow dropping the word "filter" from the name inverts the apparent meaning... It's official product page (not a sales page, see the linked vendors for sales) is here: www.raspberrypi.org/products/pi-noir-camera-v2/ It should be available for around $30 USD.
Thank you for your information!
Useful video 👍
Thank you!
Excellent video, thank you. What was that small power supply you used?
Could be dp20v2a or similar variant with custom case and a transformer inside if that case
Later he uses a generic power bank
Yes, it was a dp20v2a with a case. The DC power comes from an old laptop power supply.
Nice demonstration !! I like how you explained the physical part
Can i use this IR camera to inspect hot surfaces ?
No. Heat is in a different wavelength
This type of (near) Infrared acts like normal light generally, whereas far infrared can be seen as heat which is closer to the frequencies of microwaves and radios and requires slightly different sensors
I don't remember which non profit organisation it was, but it sells a foldable, cardboard version of the same... To be clipped to your phone. It was available on Amazon and I almost bought it.
I think you mean PublicLab: store.publiclab.org/products/papercraft-spectrometer-intro-kit
Thank you for the link!
Actually You can download for free and build it right now for less then 30 minutes ! github.com/publiclab/papercraft-spectrometer
Great video!
Thank you!
IR Fernbedienungen lassen sich meist gut mit der Handykamera prüfen.
Danke für das Video.
Richtig. Die haben keine guten IR filter. Allderdings weiss man dann immer noch nicht wo sie senden (wenn einem das interessiert)
I like the new PowerPoint design Andreas. 😁
Thank you for your feedback!
I don't know if you are doing -black'n'white- analog photography or know someone who does, but if you want a daylight block filter get a piece of fully exposed and developed -BW- color film. You can easily cut a piece to fit into the camera and replace the original IR block filter for example. It's really weird when you look at the roll of that film with a camera modified like that, because you hold something black in your hand but the camera sees right through it.
Oh, and also take a look at paper money with an IR cam. Don't know if it works with swiss francs (I'm pretty sure it will), but it does with Euros, Yen and pounds. You will be surprised!
I think you mean a fully exposed and developed of color film as a visible light blocking filter. A piece of B&W film like that will be an all light blocking filter--which is much less useful.
@@davidwillmore
I'm pretty sure the piece I have is B&W film that I got from a friend, who was doing B&W fotography at the time. But I can't guarantee it. Are you sure B&W film is also blocking IR? If so, I will retract my statement and claim the opposite ;)
@@superdau yes, I am entirely sure. Film scanners that do scratch detection is IR to detect the scratches as they will block light of all wavelengths while normal "black" negative will only block visible light. If you scan B&W negatives with this on, you get a nightmare image from the very confused scratch removal code.
Your friend might have had some of the c-41 processed "chromogenic" B&W film which was similar to color negative film but was sensitive to all colors.
@@davidwillmore
An hour of wikipedia and photography forums later... Ok, I learned something. Didn't know that was possible (not the learning, but the dust/scratch detection with IR ;) ) . I revoke my previous claims and changed the original comment. As for the other times I made people search for exposed B&W film only to be disappointed... let's just hope they never tried it anyway ;)
I like the new colorscheme :)
Thank you for your feedback!
If you need a quick and dirty IR checker, for like seeing if your TV remote is transmitting, the cell phone camera will typically show a lit up LED transmitter on a working remote.
You are right
Great video Andreas Spiess!
Do you know more specifications or the reference of the IR LEDs?
I would consult its datasheet
@@AndreasSpiess Thank you! Of course...but AliExpress doesn't provide the datasheet :( and I don't know the number reference... could you help me, please?
MotionEye is really cool especially with odroid and Pine. Thanks for the tip !
You are welcome!
Like the new background
Thank you for your feedback
Can you explain what to use to make a UV scanner like www.sunscreenr.com? For checking sunblock coverage?
You find UV sensors on Aliexpress
I used LEDs with "blue touch" for IR gates at the racing events. 4 LEDs provides enough IR light for up to 50 meters gates at a very sunny day, which is more than enough.
Wow, that is a big distance. Did you document your setup?
@@AndreasSpiess Nope. Just passed whole telemetry system to the buyer and that's all. Can it be documented at all? I mean, 4 LEDs driver by a P-Channel mosfet, 2 ATtiny13a, one to generate pulses on one end, another one to receive pulses from TSSOP on another end, and 2 L7805 to power everything up. Seems too simple to document.
Nice info, thanks :)
Glad it was helpful!
Awesome video, thank you for the job! I have a question, how could we make UV-light visible with some tinkering? It would be really cool and interesting to see.
I never tried.
There are UV Test Cards that will glow when exposed to UV light.
Camera is based on OV5647. I have similar one. Try using raspistill with exposure mode option set to night. I guess it switches camera to IR mode. Didn't try it with raspivid yet, but option should be available, too. Using that option produces much more usable "IR like night vision" pictures. I'll try to test it, if it is really IR.
It is a webcam where he removed the IR filter
Tack
??
@@AndreasSpiess gracias en sueco 😀
Hello Andreas! May I ask you for a little test? Can you shine thrue your hand or finger, and see your veins in that camera ? I wonder if its possible and how effective is that. I'm thinking about making veins scanner (like fingerprint recognition), and I'm not sure if such price level is enough :)
You need Röntgen rays to shine through flesh.
@@AndreasSpiess well you can also use strong flashlight next to hand in the darkness and you will see at least few veins :) I was hoping this effect could be even better using infra red light and camera without ir filter. I guess vein scanners might use same technic.
Excellent video ! I would like to make an IR camera to photograph artists' oil paintings in the near infrared (800 to 1500/2500 nm). This allows you to see under the first pictorial layer. So I need an HD camera but which does not have an IR filter in front of the sensor. I saw that the new Raspberry Pi HQ camera could be suitable, but unfortunately it has an IR factory filter. Do you know a camera that could do the trick ? For my part I do not want to "de-filter" my Canon EOS camera. Thanks.
I do not know a lot about cameras :-(
Old reply but most commodity cameras drop off dramatically at 1000 nm and don’t pick up anything above that. Getting a camera sensitive to IR > 1000 nm is going to be much more expensive than a pi cam
Thanks for the video, I am quite interested in infra red cameras at the moment!
Why did you stop using a #number in your video title? I find that very handy when you refer to a previous video.
I did not stop it. I just do not do it for the newest
@@AndreasSpiess I checked that and noticed you had not done it for the last four videos, so I asked. Good to know that you are continuing this practice!
I am usually about 10 behind
Good choice of beers! 😊
:-)
Does CD or DVD work? Maybe higher density materials such as sapphire is better as they have higher refractive index?
I never tried
@@AndreasSpiess But is it worth in theory?
Wonderful and insightful video, thanks !!
And I swear it is not a ‘comment about your beverages habits’ as I thought about it before seeing the second part, but the way you pronounced ‘Shit’, was a great moment of joy (thanks for the smile) :-)
You are welcome!
I do not want any additional comments on drinking and filming.. lol that was epic!!!
:-))
Hi, sorry i'm "off" topic. struggling with an esp-wroom32 nodemcu v1.1 how i can flash some recent espeasy (with webgui) on this board? i only succeded with r20100 which is rather old but at least it works to some extent. all the newer firmwares boot up with endless cycle of some c file error.
Maybe you place an issue on GitHub? This would be the right place to get help.
@@AndreasSpiess Thanx, i found some solution, succeeded to flash recent espeasy mega FW. seems the FW they offers does not work unless i burn addditional bootloader, partitioning data and another small bin in advance. as i flashed from cmdline all the bin files i have a decent running espeasy mega FW. now i'm suffering from some hardware bug about external power supply.
Any modern cell phone camera can "see" infrared light! I use it regularly to check if my TV's remote controls work or if the batteries are exhausted
You are right. Usually they have bad IR filters
Can you find the best components to combine with Raspberry Pi 3B+ to make an IR Range / Distance finder? Make the strongest and best one you can. That would be most interesting!! That would be most useful tool to many people around the world! Humble Appreciation! Alton
As you saw here for an amateur it is much easier to buy one than to make it yourself. So I will not try it :-(
Any chance to show what parts to exchange for a UV sensitive camera? As if checking for sun blocking protection? SPF coverage on kids?
I did not look inside that topic. But I never heard of a UV filter needed to protect the camera chip.
@@AndreasSpiess i.e. sunscreener.com
I'd like to make one for a summer camp/residence
Thanks
yay im in the first row! :P
interesting cheap Spectrometer project..thanks Andreas! yet another great vid!
Thank you! I also liked the device.
Great Andreas. like German accent!
is it possible to set wavelength start from 200nm?
No. the webcams do not detect such wavelengths
@@AndreasSpiess thanks for your kind reply. isnt it because webcam have fish eye FOV?
With the spectrometer could I use it to test soil and water samples?
This one has no active light source.
Andreas Spiess do you know how to make one that could test water and soil quality and safety?
Sony camcorders with the nite shot feature can see IR without doing anything to the camera.
You are right. I had one of those long time ago.
Hi Andreas! Usually normal cameras do pick up some IR. Definitely not as good a dedicated IR camera, but at least my phones can detect IR light. Used it to check the battery in remote controls when I didn't have a multimeter at hand :) Just out of curiosity, how does the big IR blink from the remote repeater looks on a phone or regular camera?
Oh, and the DPS power supply: I didn't like the idea of banana plugs dangling from the back. If it falls off, it might cause a short or kill lower voltage parts. Also old laptop PSUs dont't have banana plugs. So drilled a hole, and added a socket for a barrel plug. Feels safer. And conveniently has the same diameter as the old laptop PSUs from my drawer.
I checked with my Sony RX10. It did not see any IR. Concerning the DPS: A good idea if you always use the Laptop PS.
@@AndreasSpiess Thanks for checking, looks like they skipped the IR filter in the phone...
Yes, I do that with my phone as well. Quite helpful when you have someone coming to you (I repair things for others) saying the remote doesn't work and "the batteries are new, I swear". Half the time it's still the batteries, but in many cases a few of the most used buttons stop working. And that's really easy to check with the phone.
Nice! :)
:-)
Hey can you start doing projects with orange pi or banana pi or something we are able to purchase
I will stick to Raspbian OS, but decided stop producing Pi videos till it is available again.
What power supply is that?
it is a DPS5005 with a case.
Is it possible to get this to work into the 7- 14 micrometer range?
I do not think so.
@@AndreasSpiess ok thank you, I'll have to figure out a differnt solution
@AndreasSpiess >>> Great video...👍
Thanks 👍
can we try this on fruits to check the quality
I do not know.
Sadly the link to the camera is not working - do you have the description to replicate your results?
You find many other such cameras on Aliexpress. They are mostly the same. And no, I have no writeup.
@@AndreasSpiess Many thanks for the reply. Your content is excellent - I was just overwhelmed at the variety of different sensors available - IMx219/290/291/433
Can't you control the sensitivity/exposure of the camera?
You can control the sensitivity (and you have to)
@@AndreasSpiess I mean for the part where you said "what we can't see here is, the smaller the beam the more light is concentrated"; if you fixed the exposure it might be easier to see when the light is stronger.
can you do a demonstration how to measure SO2 using that device? TY
I am no chemist and I fear experimenting with chemicals :-(
@@AndreasSpiess No need to take chemical Sir, just take using spectrometer to measure the emission, you are mentioning chemical spectophotometry, its not that I mean, taking only EMISSION rate doesnt need to take it chemically Sir in which I only want to know how to measure it using spectroscope
The substances which can measured with spectrometry have to have a distinct and stable spectrum. I o not know if SO2 has such a spectrum.
@@AndreasSpiess search FLYSPEC its an example of using a specctrometer to measure and Identify the volume of VOG released by a volcano which is an SO2, which is why I ask u if you can modify the program which there is a graph output to measure the SO2 content of a degassing of any volcano using this spectrometer, but since you have no Idea yet well. . . . .. . .
I Just smiled as i thought of the only dark room in your House. Your Hidden "dark room"...
Secrets are not for TH-cam ;-)
Diesmal auf Deutsch: Sehr geniales Video. Makers don't give up. Ok, doch nicht alles Deutsch. Grüße ausm Nachbarländle
Vielen Dank. Nun bin ich wieder zurück!
Would you happen to know if you can see carona on power lines?
This is so epic....you have outdone yourself with this video
I do not think so.
@@AndreasSpiess the cost of one that can is around 50k USD. It's on my list of things to try.
If I don't test an item when it arrives, it sometimes doesn't work later. Damn Murphy!
Happened to all of use, I assume :-(
I thought cameras based on CMOS sensors were already IR sensitive - they actually add an extra piece of plastic in front of the sensor to act as an IR-opaque filter - you can turn (almost) any digital into an IR digital camera by removing this piece of plastic.
That being said - different sensors have different specs and of course they try to engineer things to maximize visual spectrum - so the trick works better on some stuff than on other stuff.
I think I mentioned that Chris has to remove that filter.
@@AndreasSpiess Ah, yes you did at 6:45 ... sorry, I wasn't paying enough attention the first time, lol.
Hi Andreas, hou should get some Perspex black 962 (look on eBay for example). This type of acrylic blocks visible light but passes IR light. May be helpfull for investigating IRnlight during daylight.
Good idea. Thanks!
I don't know if you are doing -black'n'white- analog photography or know someone who does, but if you want a daylight block filter get a piece of fully exposed and developed -BW- color film. You can easily cut a piece to fit into the camera and replace the original IR block filter for example. It's really weird when you look at the roll of that film with a camera modified like that, because you hold something black in your hand but the camera sees right through it.
@@superdau the scary thing about this perspex is that you can easily build something inconspicuous like a flower pot and hide a camera in it without visible hole etc.
@@m00st why hide camera's? Only perverts hide camera's.
Falls mal e kamera bruchsch wo de IR filter fählt ich ha no e Nikon D300 woni de filter use gna ha.. eifach melde lit e nur ume..
Danke!
Do the IR leds emit visible light at all? From your graph @6:06, I would suspect not. Some IR-leds do: th-cam.com/video/D_q1XS3yo8Y/w-d-xo.html
They do very little. You see them glowing red. Very weak
The idea of using a webcam and diffraction grating for a DIY spectrometer was something that PublicLab came up with years ago. They even have a website you can upload a spectrogram to, to identify pollutants. publiclab.org/wiki/spectrometer
Thank you for the link. Interesting project!
Andreas on another note (and now another comment) I did some experimentation and a project for a local innovation competition that involved some redistribution of the LED light pattern. I did not try to patent at the time though I was considering it. That turned out to be a good decision since I checked two years later and someone had patented the idea two months before I came up with it. Patents are weird. It takes 18 months for them to be published so it was not possible to know about that patent at the time of my idea.
Its a short video with the LED stuff closer to the end.
th-cam.com/video/rxbDLPN9lZ4/w-d-xo.html
patents are published as soon as you give it to your office but only your state can see it to choose if your patent try fall into secret; if not then it is published for member country for the same purpose; after this it is published for peoples that pay to see everything before it go to public publication then if no one in this elite people want it you may have the patent you paid if no one patented it before .....
@@christophemalvasio5569the process I know does not work that way. A patent application is not published or publicly available upon submission. It has to go through the inspection process first and be granted. Upon grant its published (after a fee of course). Between submission and granting it takes about 18 months as far as I recall. During that time no one in the public knows about the patent application.
What country are you in? I can send you some links on US applications. The EU application is a even more complicated. WIPO is a different thing. That is not a patent but more of a reservation system.
@@manickn6819 i'm in france
@@christophemalvasio5569if someone is coming from outside they would have to go through the EU level first then designate in France. Some years ago I went through the process of getting a WIPO opinion and filing in the EU. The process is so long its just draws down funds. I stopped before designating further to membership countries.
Instead of using motion eye you could have used a VNC server
Thanks!
@@AndreasSpiess youre welcome
could do even better if you get a camera/detector without the color filters
May be of Interest, note the prices though :-
Infrared Camera Comparison- 6 IR Cameras Reviewed from $250 to $25K
th-cam.com/video/58Lpccc-wGM/w-d-xo.html
This is a different topic, I think. More related to my IR camera video. Here we look at the spectrum.
@@AndreasSpiess Spectrometer; use for checking Chemtrails, see which chemicals are in the clouds etc.. ~ e.g. checking for mercury 3: 35 needs a bit of focus :)
Older cameras had worse IR filters
if (useful || interesting) Support();
speaking of radio waves, dont you find it a bit odd that they couldn't detect the CMB at Professor Houruni antenna in the mountains of Armenia far away from the oceans, they also could never detect the monopole spectrum at L2, water is a good absorber of microwaves which also means its a good emitter of microwaves, me thinks we are all living in a lie.
I do not understand :-(
Infact, the inventor of uv curable resin for makers, discovered the compound in dentist's office and asked the doctor for it's source. He brought several pounds of it. Bring too brittle, he hired a team to modify it for maker's needs
Interesting!
Please go back to your "old" colorscheme ..... Anyway - good video, as expected!
For the moment there are far more comments which vote for the new one :-(
@@AndreasSpiess This is irritating, because good presentations are always simple. The dotted background is really overdozed.
That i-phos spectrometer looks like a cool project, but it's not, it's a very low quality commercial product. The website doesn't even explain how it works, the hardware is closed, the software is closed, you can't even get the software without buying the device, it's not maker compatible at all.
I am not sure about your comment. The software is free afaik. And you can build your own camera using my link. Of course you have do do your own tests to find the right angle.
@@AndreasSpiess The software is provided via emailed link after purchase, I suppose it's a philosophical question whether that counts as free or not but it's certainly not open source and I won't be able to get my hands on it without purchase. I can certainly build my own if I'm up to the task but I will find very little in the way of resources at the i-phos webpage, the Wikipedia article on spectroscopy will be much more useful.
I don't want to imply that I believe there's anything wrong about this device or the manner in which the creators has chosen to bring it to the world but as I said it's not particularly compatible with the maker philosophy.
Maybe you go to this page where you find the download link: www.theremino.com/de/downloads/automation
I'm interested in mounting my spectrometer to use it with Theremino (free). Unfortunately, as a graduate student, I can not afford the i-Phos Spectrometer from Chris W the moment. Which camera would you recommend for this purpose? It seems ideal that the camera does not have an IR filter. I plan to use it to obtain the emission spectra of blue, green and UV LEDs, and CFL bulbs for my photochemistry studies. Thank you in advance for your time.