Old 03-11-2017, 03:20 AM #1
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Default Hey check this out

I pointed my 405 nm laser beam in the top in to of a glass bottle Bud light lol but it kinda turn a lil yellowish I haven't seen it be4 thought I post a pic . the laser not sure what the exact power output is I don't have a lpm but it can light white printer paper on fire no problem and cut white 1/8 rope so iam not sure the out put of the laser is . its not on the sticker on the laser .but I only have it running on 2 3v123a . It's supose to run on 2 3.7v 16340 so I still have not got the maximum of what it can do .
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Old 03-11-2017, 03:40 AM #2
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Default Re: Hey check this out

I think I've seen this done with different whiskies and such. I can't remember where I saw it though. Interesting.
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Old 03-11-2017, 06:53 AM #3
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Default Re: Hey check this out

Yeah, 405nm will fluoresce just about everything it touches, always interesting to play around with. Green will visibly fluoresce many things too. Pink highlighter pens are a good example with those, but they'll do it a little with things like whisky too.

My 325nm Helium-Cadmium lasers were cool from that point of view, invisible beam but they'd fluoresce everything. 30mW of 325nm on a sheet of A4 paper looked like ~50mW of ~450nm.



Above, ~30mW of 325nm on a sheet of regular printer paper. 325nm is actually invisible, all of that blue is just fluorescence.

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Old 03-11-2017, 08:00 AM #4
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Default Re: Hey check this out

Diachi, I'm super curious to actually see what that looks like, but it doesn't look like there are any pictures in your post.
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Old 03-11-2017, 08:08 AM #5
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Default Re: Hey check this out

If you have any vitamin B2 pills (or possibly vitamin B complex pills), try dissolving one of them in a large glass of water and hitting it with your laser.
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Old 03-11-2017, 08:45 AM #6
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Default Re: Hey check this out

Even 445nm will cause noticeable fluorescence. You can also use <445 to charge phosphorescent objects. Shining 532nm onto red objects often gives a yellow/orange dot. If you have high enough power at 532nm you can even pump a CW dye laser and get around 582nm with Rhodamine 6G. Hap?
Cool HeCd laser Diachi. You're lucky to own a UV laser.
I haven't tried that one H2Oxide. Do you have any pics.
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Old 03-11-2017, 09:33 AM #7
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Default Re: Hey check this out

Quote:
Originally Posted by alphabirth View Post
Diachi, I'm super curious to actually see what that looks like, but it doesn't look like there are any pictures in your post.
You can't see the pictures? Weird, they are stored here on LPF. Maybe I'll check my settings or try uploading them elsewhere.

Quote:
Originally Posted by CurtisOliver View Post
Even 445nm will cause noticeable fluorescence. You can also use <445 to charge phosphorescent objects. Shining 532nm onto red objects often gives a yellow/orange dot. If you have high enough power at 532nm you can even pump a CW dye laser and get around 582nm with Rhodamine 6G. Hap?
Cool HeCd laser Diachi. You're lucky to own a UV laser.
I haven't tried that one H2Oxide. Do you have any pics.

To have owned*

I sold the Omnichrome 74 series HeCd to Edinburgh Napier University and left the Kimmon behind with a friend (lasermad on PL) when I moved to Canada.

Really cool lasers, would definitely pick up another if the opportunity arises. Maybe a 442nm one this time.
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Old 03-11-2017, 10:01 AM #8
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Default Re: Hey check this out

Quote:
Originally Posted by CurtisOliver View Post
I haven't tried that one H2Oxide. Do you have any pics.
Unfortunately no. My 405nm is undergoing repairs.

My fluorescence experiments are usually restricted to actual laser dyes like rhodamines or coumarins for my dye laser though. I just suggested B2 because riboflavin is one of the few strong fluorophores that is rather common and that the OP was likely to have lying around. Another one is quinine, which can be found in tonic water and fluoresces a nice bright blue color when excited (though you probably already knew that).

If you're interested in this kind of stuff, I plan on doing some experiments to determine how different halogens alter the emission and absorption spectrum of 9,10-Diphenylanthracene when substituting different hydrogen atoms on the anthracene core sometime in the future.

EDIT: Yeah, I can't see your pics either diachi.
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Old 03-11-2017, 10:11 AM #9
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Default Re: Hey check this out

Yes, 405 nm is cool. Also try something washed in detergent. Just difused light makes it glow. BTW my avatar is 405 nm fluorescence in glass of beer.
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Old 03-11-2017, 12:00 PM #10
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Default Re: Hey check this out

Shame Diachi. I would go for another uv one. So impressive. At least your laser went to a uni. I'm sure Edinburgh university does laser physics degrees.

I hope you get your 405 fixed H2Oxide. I'm interested in cw dye lasers. Please post some images when you can.
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Old 04-02-2017, 10:38 PM #11
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Default Re: Hey check this out

wow thats funny I noticed the same thing in coke a while back and went on a quest asking professors of different departments what they thought. I found after a bunch of experiments with different drinks that the sugars were pretty much the only commonality. General consensus as I understood it (O. Chem a little rusty) as discussed above was that conjugated rings can fluoresce hence, sugars causing the common yellow glow. Pretty incredible right?
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Old 04-02-2017, 11:25 PM #12
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Default Re: Hey check this out

Quote:
Originally Posted by CurtisOliver View Post
Even 445nm will cause noticeable fluorescence. You can also use <445 to charge phosphorescent objects. Shining 532nm onto red objects often gives a yellow/orange dot. If you have high enough power at 532nm you can even pump a CW dye laser and get around 582nm with Rhodamine 6G. Hap?
Cool HeCd laser Diachi. You're lucky to own a UV laser.
I haven't tried that one H2Oxide. Do you have any pics.
Haha, maybe 2.6W's of 532 is indeed enough

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Old 04-03-2017, 01:50 AM #13
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Default Re: Hey check this out

When I was a kid and a rock hound i used a black light to identify fluorescent minerals. Back in the 1960s it was common to have posters that would fluoresce brightly when exposed to black light. I would have loved to have diachi's HeCd, but you don't see them around much any longer.
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Old 04-03-2017, 08:29 AM #14
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Default Re: Hey check this out

Here you are Hap. I reckon you could see around 150-200mW of 582nm with 2.6W of 532, all depending on your efficiency of course. 2.6W may seem a lot to us, but for dye lasers it really is just hitting the threshold.



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Last edited by CurtisOliver; 04-03-2017 at 08:29 AM.
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Old 04-03-2017, 08:46 AM #15
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Default Re: Hey check this out

Another fluorescence effects from experiments I've done:



Fluorescence caused by 532 nm laser in uranium (?) glass. (Sorry for quality - mobile camera from close distance - therefore a lot of interference makes it blurry.)

Quote:
Originally Posted by Radim View Post
...


It is a deep zoom in one of my test shots (so sorry for a poor quality). Look at the 405 nm laser paths. On the left you can notice a little rainbow! My 405 nm dildo is a true rainbow laser! Oh, not really - it is as monochromatic as lasers are. It's just a huge fluorescence of high energy 405 nm photons on wood. The sphere separated it from much brighter 405 nm laser light due to different refraction indices of glass for different wavelengths and brought it into rainbow. Note that energy of fluorescent light (which is not coherent laser light) is much lower and lays deeper bellow 405 nm and also there is a slight gap in the spectre missing part of blue - energy issue. I really love this effect. If I'm mistaken in some part of my explanation, let me know - I'm here on LPF to learn more as well.
Link to original post.

And I really love when my clothes are shining under glow of 405 nm.

It is such a fun to do these experiments.

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