YELLOW LASERS?!? Finally - after 25+ years of collecting!
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- Опубликовано: 29 сен 2023
- Welcome to what may very well be the most informative video on yellow lasers online. Simply because there aren't many yellow lasers around - making videos about them even rarer...
After 25+ years of collecting lasers, I finally should have some too. Two new colors, supposed to be 561 nm and 591 nm, in the yellow gap between red and green.
I will test their color (wavelength in nm) and power output. Are they as specified?
Are they even yellow? This may depend on the eyes of the beholder. What do you think?
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I felt color 14 had the first sign of a yellow tinge, while 19 veers over the yellow green line and into yellow. Loving the video so far!
Saw the first yellows at 37, with yellow achieved at 44!
I had 14 as well.
This actually. Exactly the same here
Same
Same here
When it was transitioning, 15 seemed like the point where it turned yellow, but when you showed the grid, it felt more like I wouldn't call it yellow until 21 or 22. The number I call yellow would probably change depending on what other colors are around it too.
Same here
That is true of everybody. Colour science has two versions, one for physicists and another for psychologists and biologists, because as soon as the brain is involved the whole perception game comes into it, and that is very important to remember when working with colour. Designers are often well aware of the psychologists'/biologists' version of colour science as they need to be. If they also work with screen and print - of course most do nowadays - they also need to be aware of the physicists' version of colour science as well.
Same here.
I got the same impression. 22 was my pick on my 1st monitor and 18 was my pick on the 2nd. My first monitor is colour corrected to close as I can get for image editing. For the second laser my pick was 50 on the 1st monitor.
Similar: 18 standalone, 21 grid
Edit:
42, 44 on the red side.
never in my life i'd think i'd see someone so enthusiastic about lights.. as this man is
How bout @styropyro ?
I just bought a couple of these myself. That "561" yellow is about right between a pure yellow and green (532 is much closer to a pure green). But yes, when you compare the two it's a night and day difference. The "591" units I have (3) are most definitely a strong amber color. It feels more orange to my eye than amber. It's my favorite wavelength thus far. The one thing I've noticed is that those amber lasers are REALLY temperature sensitive. They have to be fairly warm before they will lase. My first one lases at 532 very weakly until it warms up, yet the other two I have do nothing until they lase at the yellow line. Perhaps a filter on those? But what a gorgeous color! And I love that yellower green also!
For me, the color test was harder than I expected.
When they're displayed as a grid, I'd say that 22 is where I'd consider it a yellow.
For the 2nd test, 44
This
Exactly the same in my mind as well. Anything less was more green or red than yellow. I called them out when the color count was happening to boot.
14 was when I first saw yellow, 19 was when I really saw yellow. I started to see yellow coming in at 40, but like stated in the video it’s like an amber yellow-orange, definitely saw it at 44 as yellow though
that possibly, the reason why, high end professional video kit, cost big bucks and you phone or computer monitor did not? 🙂
Same here
This might now be my go-to video for describing how color blindness works because numbers one through 25 look exactly the same to me. There is no difference to my eyes and I haven't found a good way to explain that to people until now
intriguing.......and what about coming from the red direction?
Thank you for explaining!
Same here, do you have daltonism? When he showed the graph I see yellow much more to the orange side.
@@ryuguy032197 I could actually distinguish between red and yellow, but I think that's because he took larger steps between the pictures
@@forton615 I have both the major color blindness types at the same time which is not really fun.
Red-green and blue-yellow at the same time
That chart colour test is cool. Like everyone else once they're all on screen you would jump a few numbers up from the results when alone. I said 17 for yellow from green and 21 when together. Then 40 for yellow from red and 43 when together.
Pretty amazing.
I think you should do the color matching both ways, because for me it always turns "yellow" earlier when you go from green to yellow than it turns "green" when going from yellow to green or when comparing them on a grid.
Thanks for testing these. I saw them on ebay a few months ago. I'm disappointed neither one tested as 589 as I was hoping they might be suitable for experiments with sodium absorption. No such luck being this far off I think.
To do sodium you need an EXTREMELY narrow and stable wavelength, you won't get very good results with uncooled pen lasers with a wide spectrum like this. High power fibre lasers for GSL need ~10-20W or better, extremely high beam quality, from memory around ghz linewidth, extreme stability for the wavelength required. basically 6-7 figure lasers.
Atomic physicist here - I shine lasers at atoms all day. @N4CR5 is right, it will be an extreme uphill battle with a laser pointer. I don't think it's strictly impossible.
You will at minimum need to have extremely fine temperature and current control. On the cheap (and with ~weeks of effort), you can do this with Peltiers, a lot of insulation, and a homebuilt current driver (not trivial). You will definitely need to do surgery on the laser. Once this is set up, first find the absorption line with an extremely high OD vapor cell (maximum path length for high absorbance, as hot as possible to increase the Doppler linewidth). You will need fairly stable powers to get enough SNR for absorption spectroscopy. Without a wavemeter this will require a lot of trial and error to find the resonance (spectrometer is not precise enough - monochromator might be ok). Once you find the line, you can do a side-of-fringe lock to the vapor cell. If everything goes perfectly, this can probably get you down to the ~100s of MHz, which is good enough for room temperature experiments.
Best of luck - it won't be easy.
P.S. 591 nm might be tunable down to 589 nm via temperature. You'll need to tune the SFG crystal temperature and orientation to get good phase-matching as you do this.
Love your uploads
@SamuelLiJ do you think a dye laser could work for this application, it's the only not incredibly costly option i could think of
@@creativity1403 Yes, if you're fine with pulsed operation. A CW dye laser is trickier for a home build (but within the realm of possibility these days). A diffraction grating as the dispersive element should get you ~GHz linewidths if done well. Even with poor spectral quality, you can probably do some interesting stuff with optical pumping and RF (1.77 GHz is reasonably accessible).
15 or 16 is where I felt it pivoted to green-yellow, but 22 is probably the first color in that group as yellow itself. For the Amber question, it definitely looks like yellow starting 43
same exact answer tbh
Same here, I originally thought 19 because of the color changing, but when I saw the chart and went back to it, paused, and let my eyes adjust, the color changed. When the colors were constantly changing though it almost tricked my eyes into thinking the yellows were orange.
i agree
Fascinating! Never looked at this subject or many so closely in such a short concise span.. my love for what i describe as a bright sulphur green might be explained here too..
have absolutely no clue about lasers, but found your enthusiasm made me wanna check it out. really dug your method of explaining how different the colours were in your eyes. i thought 20 and 44 were yellow btw
I felt a difference at 17 but it took me for 18 to show up to consider it as turning towards yellow. Still, maybe due to the animation, I was thinking 16 would have been the more accurate answer. Either way, this is my phone's screen and screen calibration standards are all over the place AFAIK.
same! felt like a sudden switch at 17 for me, while it was kind of the same before. really interesting!
Those were the same numbers for me and I’m using an iPad Pro with the mini LED screen which, being Apple and being one of the pro devices, the color calibration is known to be very good right from the factory, so either my eyes have a similar deficiency to what you have or your screens are pretty accurate at least in that region of yellows.
On an s23 ultra with the vibrant screen mode, I'd have to say 22 is what I'd consider the start of yellow. I can see the green begin to change noticeably from 12 upwards from my peripheral vision and 15 looking directly at the screen.
My phones oled screen isn't in a calibrated mode and I'm a guy, so I could perhaps have color blindness.
Edit: this is for the first chart
what about the most advanced xoami phone
I think the bigger limiting factor than the phone screen is the compressed colorspace you have on RUclips.
I also have an s23 ultra so nice failure to flex. I have colorblindness
@@Tristand09dude, we don't care.
@@ireallyreallyreallylikethisimg ikr? Neither do i! Thanks for pointing out the obvious
I tested both my "561" and "591" units for wavelength using a 1000 line/mm diffraction grating at 150mm distance and came up with exactly the same wavelengths you did. My green came out at a hair under 558nm and my amber produced an exact 593.5nm (just as I suspected it would)! 😂
Thank you for the work put into these. My comparison for Orange is 589nm from Sodium.
So while these are still exciting for laser pointers with Orange and Lime colours. Getting nice Yellow laser pointer is still an interesting goal.
18, and 43 are where I started viewing the color as a shade of yellow, rather than a yellow-tinged other color. To my eyes, through my screen, the first laser is definitively green, and I would definitely call the 2nd laser yellow, despite it being redder than where I drew the line in my screen test.
This video highlights an often overlooked issue that of matching the safety glasses wth the laser under test. I have never seen this issue addressed before--and a subject worthy of a video. Thanks.
16 &42 for me !
I'm in my last years before my bachelor's degree and I never understood why there was no yellow lasers, thanks for sharing this...
Cool video, thanks! And nice choice of music.
11 was where I felt it was turning yellow, 19 seemed like a lime green to me and 22 is what I’d consider yellow.
As for the orange-yellow one, I knew it was turning yellow around 39, and 44 is what I’d consider yellow.
I’m close to you. 12 for me. But when I saw all the colors lined up it was 16.
That 593 pointer is gorgeous!
I used peripheral vision to determine your color chart... for some reason it worked much better than when viewing directly.
I'm partially colorblind, and frequently use my peripheral vision to identify colors.
Great video, thanks!
20 mW looks definitely like too much power at this wavelength. A typical problem, especially of cheaper semiconductor lasers is the inadequate NIR filter after the doubling crystal (or SFG). Meaning you get your visible light out (i.e 593 nm) but the fundamental NIR beam goes out too (1342 nm). Keep in mind that the efficiency of SFG or SHG is likely below 30% (maybe 10?). However, you can't see that while using Si spectrometer, that goes max to 1200 nm, due to Si sensitivity.
To get accurate reading, you can either use a good low-pass filter, that transmits only visible and blocks all IR (1300+ nm) or use a prism to disperse the output and try to measure power on the red side, where you can't see anything (IR). I would guess, you'll measure about 15 mW of NIR photos that leaked out.
And again, amazing video. I'm subscribing right now!
17 and 42. 17 reminded me of what the wild grass in the high desert starts to look in the summer. And 42 is when I'd start to say it's more like a lemon than an orange.
As a color-blind person, I was shocked to see that even number 1 looked yellow to me, apparently the brighter the green the more yellow it looks for me even though 1 should be a perfect green
I dont like this game. >:( All squares are thze same colour.
Me too. They're all yellow but with varying lightness and intensities
congratulations! i used to have a 593.5nm laser from CNI a long time ago, and i still regret selling it to this day :( i saw sanwu lasers are offering pocket series lasers in that wavelength now too!! i think i might get one :) and to answer the question at 5:00, i think 20 is when it definitely becomes yellow in my eyes, and for the second test 42
Thanks! I am certainly not selling mine :) But yes, there seems to be more choices now in the yellow range. And thanks for the early watch and comment.
Never been more interested in colors before great
When they were going across the screen for me it was 18, but when all were shown I was surprised to see 18 still looked really green finding 22 to be the start of the yellow. Light spectrum is wild.
Personally I didn't feel like it turned yellow until 20, looking at the full grid I would call everything up to 23 "green" still. Very cool!! I'd love to see you build a simple Ulbricht sphere if it's something you're interested in making. Fantastic videos as always
Same for me
same here, 20 is ok, 21 is yellow
@@Galf506 I get a different sense of color differentiation when looking at the grid showing all shades and the slideshow with one at a time. I feel like I can assign the new color earlier when I don't see all the others right next to it.
I think it's just brilliant that people go out of their way to make such a in-depth video. 👏👏
i have a huge collection of lasers, Ive been buying several from a eBay seller, he sells lots of different wavelengths, even 574nm and 395nm pointers, its really nice seeing how inexpensive they are compared to anywhere else (i think his most expensive is 300$, but i mean for the rarer wavelengths its worth it)
I had no idea lasers had this much of a market for slightly different wavelengths. Pretty cool to think about people collecting light
Those poor colorblind people
It do be sucky
First test: Around number 14 it gets first yellow vibes, 18 is like half-green half-yellow, and then 22 and above are clearly yellow
UPD: This was at 7300K color temperature settings (a little colder than default 6500K). At 6500K all said numbers will be by ~1 less, so 13-17-21
Second test: number 43 is still quite orange, and then 44 is already yellow enough to be called yellow.
During the Division Bell tour in the 1990’s, Pink Floyd has a gold laser in their display effects. It was really very golden.
My man. The narrative voice... Good lord.
It would be interesting to see the color test in both directions. My gut feeling tells me that the results will be different.
Thank you for posting the science and keeping it up for those who wanted to look, but kept it about lasers, colors and the visuals.
Your eye sees the color in contrast with what surrounds it so the number of changes when you go from looking at it full screen for one color to the frame that has everything laid out in the grid
Number 20 was "yellow" to me, and number 40 was also "yellow." Pretty strange how I think the "amber" laser is right on the boundary. I am still quite impressed with that amber laser, and now I want one for myself (of course, I would keep it in the original packaging until I got proper laser safety glasses.)
How, I wouldn't be able to resist opening it up, seeing what's possible to crank the power up and burning things with it. To hell with eyesight.
Fellow collector here - it's awesome having all of these unique colors available to us now, congrats on your first yellows. Any plans to get your hands on the also new-ish 425nm and 380nm diodes?
Ive had a yellow DPSS laser for years. Guess they got hard to find for a while
They have been available for years but been too expensive for me. Making other, much more powerful laser colors more interesting to me ;) Thanks for the early watch!
For the red to yellow one, I felt like it started really shifting towards like 40-42, and by 45-47 it was entirely yellow already.
Yeah it ranking 40 doesn't seem too bad. It does look super yellow or even gold in some parts of the video.
17 is the first one that turned noticeably yellow-tinted to me, but the first one that I'd call actually yellow is at 22.
42 is the first that I'd call yellow-orange, and 45 is the first that looks predominantly yellow.
Fascinating!
For me, colors from 1 - 10 are definitely green, and colors from 21-25 are yellow. However, I really struggle in between, as they seems more greenish than yellowish to me.
Same here, there is yellow but green is too strong to call it yellow. From the 13th to 18th I see more of the yellow but it is still green to me.
Trully yellow in my opinion would be 21st to 25th
I think the ones between look just lime green. Which is technically green, not yellow
I'm looking forward to seeing the final laser again once you've got a 3 amp adapter. Maybe 12v2a is too low for the maximum output?
As far as power... I have the exact non-wavelength specific meter you have. My first 594, same style as yours, rates at around 29mW with a 3.7v 10440 and a dummy cell behind it. My "561" rates at 28mW with the same arrangement . It's quite spectacular! My other two 594nm units both rate around 32mW on the same meter, but are visually a bit dimmer than the first, so I know there must be an appreciably higher IR leakage from those.
WHOA.. That INFINITER pen was my first laser pointer too!! I'm so proud owning that in 1996 (Primary school!).. brings back a lot of memories :')... Too bad I finally scratched the lens when I tried to clean it with a cotton ball and paperclip (one of the most devastating moment of my life back then). The laser dot was round, I haven't yet found another red laser diode with such perfect shape (all of them was square-ish).
In terms of being yellow and losing the green tint, I would say 21 crosses that boundary, but I would still choose 22 as my normal yellow. Coming out of orange, I'd call 46 or 47 a good yellow. On the screen, the second handheld laser looked a bit more orange, which looks really nice to me.
I got a dual pump amber laser a while ago and I could tell right away this thing is brighter than they are saying. The integrity of the beam over distance is also better than I have seen, as far as the shape of the dot. I think the amber is the most pretty color, and it is not too under or overpowered.
20 and 42 were where the screen started looking yellow to me. when side-by-side with the other colours, though, they look a lot less yellow than they do on their own. it's interesting how colours can affect how we perceive the other colours around them like that.
16 is great. Not when you showed the whole pallet, but in the succession clip, i was on 16🤗
I love your danish accent, it's so cozy, and not as annoying as most other destinct danish accents
22 for the first test, 40 for the second. I am slightly colorblind though, I can still see colors just fine, but telling two similar colors apart can be difficult for me, or sometimes I confuse one color for another that is similar, even though with regular color vision you can clearly tell they are different.
So you're a physical scientist with a laser collection hobby? Sick!
I just bought a 573nm dpss laser and, wow, what a difference! I thought it still looked green, but when I pulled out my "561" next to it.... holy business, it looked really yellow!!
8 was where I started to see it, and I’d say 22 is pretty firmly yellow, albeit very green yellow. Exact usage depends on context though, because colors used within an image are somewhat relative to each other. 44-46 is what I would say can claimed as yellow, at least in isolation.
i first noticed yellow at around 12 or 13. by 18 it was definitely more yellow than green. at 19 or so, i would say it gets fully yellow. for me and my monitor!
then I actually said "40" out loud on the second test. 40 or 41. Same as you! what a cool video!
You do great videos. Can you explain the math used in sum frequency generation? That would be a very cool video.
Cool video - laser output is always such a gamble.
I'd be very interested in seeing you test some of those cheap 'party' / 'star projector' type laser units - they're available for $20 and project patterns using diffraction gratings.
I'd be interested to see how much IR they leak, and how strong the central beam (which doesn't get fully diffracted) is - given they're often set up as decorations in places where the public is directly exposed.
To me it doesn't look like it is truly getting yellow until at least #25 on your scale. I have a lot of training in colour as an artist so I tend to be more strict or precise in differentiating between shades and hues. For example, I have often gotten into disagreements with family about a red not being a true red because it had too much yellow in it. (None of us are colourblind or tetrachromats, if you were wondering. "Standard" nearsighted eyes.)
Also, I highly recommend the game "I love hue." It is a nice relaxing puzzle/sorting game that challenges your ability to differentiate between hues of colours. The levels are smartly designed to give you challenges and then some easier levels to give you a break before challenging you again. I have always appreciated their subtle philosophy of not frustrating their players away.
Agree. I'd say it starts resembling yellow at 22/23, but there's clearly still too much green in it at that point. This test is somewhat pointless unless you have a decent monitor though. On my laptop's (awful) screen it turned completely yellow at 22 vs 25 on my calibrated IPS monitor. Laptop did even worse on the red to yellow test; it went from salmon to bright yellow, even though there should be a bit of green in it near the end.
Wanted to be a tattoo artist. Hasnt panned out yet but I agree with your statement. I've been caught by both others and myself having Hue arguments. It's admittedly such a weird thing to correct someone on or notice, but it's just that, something hard to not notice when you're tryna look through a colour wheel essentially. A small hint of something else can detract so much from the primary colour that it might as well fully be that secondary colour, "so it ain't red, it's somewhere between rouge and wine and I guess I'll just be that dick for life" 🤣🤣
@@TNSign IPS monitors have beautiful colors ... I miss my 42" LG IPS panel TV from 2009, no other TV I have tested no matter price have been able to match that old TV. Also that old TV had incredibly many advanced adjustments for professional use that you do not even find on most studio monitors today, a very strange TV. Now I have a Samsung 55" curved TV I use as computer monitor but it has VA panel and colors suck compared to my old TV.
To me these tests seemed like "what is your definition of yellow" . And talking about true colours, each person have different definition for them, just like how your family has on true red.
Fun Facts: Color perception is heavily influenced by language! Yes the language you grew up speaking actually effects the way you perceive the world. There's a famous test for this. There are languages that do not have unique words for the colors green and blue (they instead have a single word meaning bluish-green that expands the entire blue and green spectrum). If you show them 10 bluish-green circle with one being ever so slightly different, they have a hard time finding the different one. But for English speakers its like near instant. However there's an inverse test. I don't know if its the same language but there's a language that has several different unique names for green (there is no just "green" color). You do the same test with 10 green circles with one being slightly different color and they see it instantly. However, because we English don't often use unique names for the various greens, we have an extremely hard time spotting the circle that's ever so slightly different.
Here are a few more examples: If you take the color blue and lighten it, you'll see the new color as light blue (duh right! though you might give it the name sky blue or something like that you wouldn't argue its still light blue). We don't really have a strong name for light blue. Colors like sky blue aren't well defined in our English language. However if you lighten the color red, you don't get light red (I mean there are some hues of red and depending on how much you lighten it you might find a color you'd call light red). But seriously pink is just a light red. However we often call pink as being a separate color, distinct from red. It's not though! Its literally what happens to red paint when you mix in a lot of white paint. (Just like light blue is). Alright what about the inverse of darkening blue? We get dark blue. No real unique name for it. But what do you get when you darken orange? You get brown. Yes! In the exact same way that blue becomes dark blue, orange becomes brown. Even if its not that dark. If you see someone with dark blue jeans, you still say they are a blue color. However if you see someone with brown paints, have you ever saw them as orange?
Interesting. On that test in sequence; I felt like around 15 was where I’d say it was turning yellow, but when all of the colour cards were shown together, that looked very green still so just goes to show.
Same with the other, where 40 was my tipping point but clearly not when compared to all of the cards.
Great Video as always!
I personally reeeeeaaaly liked the 593nm laser. Such a beautiful color 😍
(Still too expensive for me though hahaha)
A yellow laser (or at least one that looks like it) has been used at the observatory in Hawaii. The reason for it is what's known as a "guide star", to minimize or maybe even eliminate atmospheric distortion that can cause distant objects to look fuzzy and blurry. The laser is literally able to zap a thin slice of atmosphere, and the mirror of the telescope is able to distort in a way as to be able to counteract effects of the atmospheric distortion. Pretty interesting stuff.
Active Optics. Gotta love that stuff!
At max brightness on an iPhone 10, with True Tone and Night Light turned off, when viewing them in sequence I got 11 as the first one being noticeably yellow.
I really don’t get much time to sit down and watch these videos as they come out anymore, so nowadays I end up watching four or five in a row to catch up. Your videos are still an intellectual delight to watch, and I’m happy to see that your patronage has only grown! Well deserved, in my opinion. Thanks Brian!
EDIT: Oops, didn’t realize there was a second part to this exercise! For the second one, 38 was the first time I’d say it was sufficiently yellow
IIRC CS:GO used to have this approach for spiral stairs on Dust2, but it resulted in a jerky camera motion so in the end map was updated to have a rather complex mesh that was used to approximate smooth spiral. 3kliksphilip did a video on that
Number 5 for me had the first signs of yellow to me, I know I have very sensitive eyes but I didn't realize that my eyes were that sensitive and going from red to yellow I started seeing a difference towards yellow on the fourth color. I have Hyper photo sensitivity which has both benefits and problems, like the ability to see IR/UV but I also have trouble with bright lights and my skin is affected too. This tells me quite a bit about what I'm seeing and just how good my eyes are.
u see IR and UV??
I saw it change around 8
I could definitely see a difference in color around the number 4 and I would say what I would call yellow starts at 13 or 14.
I love all the videos you make. They’re all so well made and always hold my attention from start to finish ❤
You have a fan in me all the way from St. Louis, Missouri 🤩😁. Have a wonderful day!!! ❤
Same but I can understand why it seems green. Our atmosphere has a good amount of oxygen which shifts all visible light towards blue (which is why the sky and water is blue)
Where do you get the info about the routes used to output different laser wavelenghts? I cant find on the internet for the more exotic ones. Or can you make a video detailing how each visible laser wavelength is generated?
I work as the lead as an optical engineer for a company where we make 589 solid state Lasers. up to 5 w of power. the company is called Advalight, but the machine is quite a lot bigger.
16 and 40 for my eyes. But I’ve been a VFX artist for 13 years. Where pixel peeping and colour matching different assets did teach me to see colours differently. I do love that second yellow laser, yes you would say it looks more amber because it’s definitely warmer but it’s a very pleasant colour to me. It’s reminiscent of the yellow LEDs.
i paint models and i seen transition between 10 -11 also i do blender but not vfx
@@vasili1207 yeah then too you see very nuanced colour differences. To me it was a weird awareness, when I started SFX (I transitioned into VFX through that) I noticed how much olive green and yellow there’s in skin tones. You think it’s a lot of pinks and reds but it’s a lot less. I also do SFX makeup so making silicone prosthetics and blending it with the skin. It’s fascinating when you feather colors the untrained eyes get deceived but we definitely see the feathering and the gradient transitions.
But I find it a lot harder in real life to match colors than doing it in VFX. Where measuring an area gives you the nice RGB averages and you can just easily push the sliders to match those values 🤣
As you know with model painting it’s a hell of a lot harder. And paints on a surface look different than in the mixing container when they are still wet.
I have a video where I make bullet wounds on the cheap for a short film sequence in a documentary. The cheap gelatin prosthetics are a pain to paint.
@@CallousCoder same here lol over a decade in the laser biz ;) colour perception for people like us is ridiculously honed compared to normal people. I can look at a colour and tell what frequency it is typically.
@@N4CR5 you do laser projection shows? Must be so cool playing with lasers and getting paid for that.
An interesting video overall! I do want to see you building an Ulbricht sphere, mainly due to my curiosity.
22, on the first test, was when the screen became yellow. I was debating 18, but it looks more like a light green there.
For the second test, 44 or 45 is where I see it turning completely yellow.
Perhaps one day, we will see the legendary true yellow 580(?)nm laser.
16 was the shade I initially saw as yellow, but perhaps that was due to seeing the evolution from 532 green. When you showed the chart, 20 was more like where a true yellow appears.
$115 sees like a lot for a laser pointer of rather generic build. I can remember these costing just a few dollars in late 90s Hong Kong, albeit of the 532 green variety.
Used to call these troubles mode hopping. I remember back a while, someone chilling the diode (532nm) to get an orange color
Man, when I was a kid I used to stare right into the beam of the red laser pointers you could buy at the store. Never put into consideration just how dangerous that actually was
i accidently stared into a 5mW green laser that i cranked up the potentiometer on as a kid, i still have a small burn spot on my retina in my left eye too this day.... unless i close my right and look for it i dont notice it, only time i notice it is when i go to the optometerist and i have to test each eye individually, the spot is close to center of my vision so it can cover the letter im looking at
it's totally understandable that as a kid you would do this but what I don't understand is why no adults stopped you 😂😂
@@moosehead4497 same thing happen to me
@@TchSktch properly because most adults think something like a "flashlight in color" bought at the store can't be dangerous
I also remember back then i didn't know the dangers of lasers.. Now today i have multiple keychain lasers and all of them are 5mW.
Nifty ! I wonder if they will take as long to come down in price as they did to develop in the 1st place . I'll be waiting for < $100
something interesting with that amber one - i was messing around with some LEDs once and put a green one directly over a 9V battery and observed a similar effect, it was very briefly green and then turned orange. I'm not sure what relevance this has to that laser as i imagine overdriving its light source for extended periods of time would kill it very quickly, but i figured it was something to note
I got yellow on card numbers 16 and 40. It's an interesting little test to try.
for me it took me a long time to figure it out.
first chart: in 15~16 i started seeing a bit of yellow, then in 20 most was yellow and a bit of green, and in 22 it was fully yellow.
second chart: in 37 it changed to orange and in 41~42 it was fully yellow
Honestly, 14 is where it seemed good enough to qualify as 'yellow', though looking at it in the spread with the rest shook my confidence. It definitely is greenish, but i'd put it in that pretty green 'highlighter yellow' area.
I wouldn't say anything earlier is primarily yellow.
Edit: For the second test, i'd say about 38 or 39 could be yellow. Shocked me again when it was in the full spread. But comparing to the traffic light situation, i'd definitely call that 'amber' a shade of yellow, so I suppose my first intuition was correct.
14 isn't even remotely yellow
@@4rumani Maybe you should make your own comment with your own opinion then. He asked for people to reply honestly based on their eyes, and their opinions, and their computer screens.
Whining about others who're different on that front when they're responding to an experiment of said kind is not only annoying, it's counterproductive. Have a nice day.
It's Chartreuse.
Funny thing is I searched for yellow laser pointers on ebay less than a month ago as purchased my first decent quality pointer this year, a 405nm as violet is my fav colour for a light source. I absolutely love it! I don't care for any other colours as I feel I have lost interest since RGB has been a thing.
Anyway, no yellow lasers came up in my search so I assumed they didn't exist in pointer form factor. Then this video came up and I was like hell yeah! Now they come up on ebay. Talk about timing!
I really like the amber colour as it feels like it's not played out like the common R, G, B colours.
I ended up buying a bunch of random odd colour LEDs when I was in need of a self flashing amber LED for my car dash warning light recently, and the min order was 10 bucks. I got some really weird colours to fill the order, lime green which looks teal to me and my fav is a hot pink LED. Both of those would be awesome as a laser pointer colour.
i know it's not a competition but i also guessed both 16 and 40 and that made me very happy
I liked your colored cards trick! Great video! I started seeing the yellowish tint at 22, but grass green is still green. Same for 24, but 25 was decidedly yellow. It is quite possible that results would vary going the other way.
As for the second orange-to-yellow series: I paused at 37 thinking: "Yes, this is yellow enough to be considered". Then I looked away for 15 seconds, and when I resumed watching (still paused at card 37) it was clearly orange, not yellow. Now it took me to 40 to consider it yellow rather than orange.
And we also call amber lights yellow here in Ukraine, but it's from the era of incandescent lights, now they're mostly LED.
The color perceptions on what is "yellow" was a very fun process to go through, and a very quick way to test one's color perception.
I personally wouldn't call either of the laser pointers "yellow", though the second laser pointer comes pretty close (21 on the green-yellow and 41 on the amber-yellow; in fact, 42 is extremely close to my favorite shade of yellow).
Maybe if I wanted a laser pointer that's close to my favorite color, I'll look at getting the second one, haha
Great video as always!
this channel would be perfect for hdr video, an oled screen would really make the brightness of lasers pop.
For me it was like 12-13 where I started to actually notice yellow within the green... but it wasn't what I'd call actual yellow until like 18-19.
Friendly reminder that your monitor is most likely RGB (unless you have one of those fancy ones with yellow pixels too), thus colors will look different (on my tv, yellow from the first looks Chartreuse, and from the second looks amber).
Different from what?
Looking to a white background between each from 18 on, 22 is the first "yellow". Running through at speed it starts to get "yellow-green" at around 18, but 21 is still noticeably tinged green. Really - looking at it after a minute away - 22 is as well. So 23 is the first color I'd call "yellow" without reservation
Edit: Second test, 46 is "yellow"
I noticed the same effect, during the actual test I stopped at 18/42, but in the screen afterward I think yellow would be a bit later, like 22/45
5:10 very much appreciated.
The perception of color is not only influenced by brightness or color settings of the display. It highly depends on the surroundings, your "training" in colors, and even the context you see it in. Brown and orange can be the same color, it only depends where we see it if we call it brown or orange (ofc not in the extremes). A slightly lime colored lemon can be called green because it deviates so much more into the green spectrum than a ripe, yellow lemon.
I got the transition from lime to yellow at about 20. transition from orange to ocher at 45, if you count ocher as yellow, but real yellow I would only call at 48.
Spoiler alert: It’s Green
For me 18 was where I started thinking of it as yellow. And 44 for the other transitions.
The really interesting challenge for me would be when I'd start making the same colors as green or red when starting at yellow.
for me, i would say 18 is where it changed from green/yellow that is mostly green to a yellow/green that is mostly yellow and i would classify it as a yellow if i had to define it based on the colors of the rainbow.
on the 2nd test, 42 is where it flipped from orange/yellow to a yellow/orange.
I have an old OCLI variable (dichroic) filter (400 to 700 nm), and I've considered the yellowest spectral color to be somewhere between 575 and 585 nm. This is right between those laser wavelengths, so I'm not surprised that the 561 nm one looks quite greenish (I'd call it a "lime" color), while 591 nm is a tad on the warm side of yellow. In practice of course, what we normally consider "yellow" is very broadband, including red through green light, as in the additive red-green-blue color sources, such as with computer and TV screens.
For green to yellow: One at a time, 14 was the 1st to look yellow to me. All compared to each other at the same time 20 and up was the only ones that look fully yellow to me.
For red to yellow: One at a time, 41 was the 1st to look yellow to me. All compared at the same time, only 46 and up are fully yellow to me.
I started to notice yellow at around 12-14. But upon seeing the whole chart 12-14 looked green! Our eyes are funny cool!
When you changed the colours one and one, I was like "yeah, 16 looks yellow-ish", then I saw it tiled, and was like "Uhm... maybe not?"
when looking at all the colours side by side, 20 is the first colour that looks properly yellow but when watching them change in sequence 13 is the first one to show become yellowish and 18 to become yellow
Using a recent MacBook screen with TrueTone disabled, 16 is the first where my brain went "yellow!", but like others have said, true yellow comes much later past 20 (maybe at 22). And for the Amber test, I'd say 42 and 46.