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Review of the Directly-Injected 488nm Greenish-Blue Laser Pen

The_LED_Museum

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I went to add this photograph to my OP, but the new BBS software here doesn't allow posts to contain more than 20 images.
So it will go into this post instead:


Photograph of the laser's beam in the water of a toliet that's been pissed into; this shows fluorescence from urochrome -- the substance that gives urine its yellow color.
 



cistercian

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I went to add this photograph to my OP, but the new BBS software here doesn't allow posts to contain more than 20 images.
So it will go into this post instead:


Photograph of the laser's beam in the water of a toliet that's been pissed into; this shows fluorescence from urochrome -- the substance that gives urine its yellow color.
I have done this with my 50mw 405nm lasers. Yes, you can tell I am a geek. UV leds are fun too!
The 505nm and 488nm lasers are excellent for exciting some materials!!!
Some b complex vitamins have yellow coloring added which is absolutely epic under UV. Hee hee!
 

The_LED_Museum

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I have done this with my 50mw 405nm lasers. Yes, you can tell I am a geek. UV leds are fun too!
The 505nm and 488nm lasers are excellent for exciting some materials!!!
Some b complex vitamins have yellow coloring added which is absolutely epic under UV. Hee hee!
I believe that the B vitamin most responsible for fluorescence (and turning your piddle a super bright yellow) is riboflavin -- aka. vitamin B2.
I'm going to try this with a 405nm laser in the morning -- I've done it in the past but I've never thought to photograph it. :eek:
 

cistercian

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I believe that the B vitamin most responsible for fluorescence (and turning your piddle a super bright yellow) is riboflavin -- aka. vitamin B2.
I'm going to try this with a 405nm laser in the morning -- I've done it in the past but I've never thought to photograph it. :eek:
The florescence will be epic! Enjoy!
 

The_LED_Museum

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Piss in the toliet when irradiated with a ~100mW ~405nm laser.
(Top): No photoflash.
(Bottom): With photoflash.

Enjoy mon capitan! :D
 

Pelagius

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Pee Whiz! Now that is funny! Try it with a vial of Whiz-mind the reflections. :)
 

paul1598419

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With all the fluorescent molecules out there, it seems strange to me that so many wish to see if their bodily fluids fluoresce. There are some that are claimed, mostly in TV shows, to fluoresce that don't. I really hope not see see examples of these.
 

Pelagius

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So I'm guessing you'd not be interested in the effects of asparagus on Wee Glow? Just kidding-I'll stick to fungi and arachnids-perhaps some minerals. I'm wondering if a 365 nm might be a better choice than the 395 nm I use.
was used to suppress the background with the Scorpion pics.


With all the fluorescent molecules out there, it seems strange to me that so many wish to see if their bodily fluids fluoresce. There are some that are claimed, mostly in TV shows, to fluoresce that don't. I really hope not see see examples of these.
 

The_LED_Museum

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BTTT: Added another photograph showing that this laser causes piss to fluoresce.


Photograph of the laser's beam shining through a glass jar of piss; the yellowish tinge (and markedly green color the actual beam has) that you see is the urine fluorescing in this laser's radiation.

Before anybody asks, ***NO*** I'm not going to attempt this with sperm, feces, or any other bodily material. Just piss! :-o
 

paul1598419

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Ditto on that! Besides, neither of those two fluoresce anyway. But, who wants to look at someone's personal samples?
 

The_LED_Museum

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Just a minor update here.
My last 488nm diode laser (the one that is the subject of this thread) was lost or stolen while I was still in Shelton WA., but I purchased a replacement in early-February, and it arrived here in Fresno CA. several days ago.

One thing that I did note is that the die image is on one end of the long axis instead of on one of the short axes.
 

Beamer123

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Just a minor update here.
My last 488nm diode laser (the one that is the subject of this thread) was lost or stolen while I was still in Shelton WA., but I purchased a replacement in early-February, and it arrived here in Fresno CA. several days ago.

One thing that I did note is that the die image is on one end of the long axis instead of on one of the short axes.
Hello Sir,
I just bought this very laser from the same ebay vendor and accidentally found your thread on here. And speaking of "axis", have you measured the beam divergence of this laser and the 505nm one?
PS: I am hoping to receive a laser that emits nm, and I will try to measure it using the diffraction grating plus ruler method, since spectronometers are a tiny bit too expensive for a student like myself. :geek:
 

Beamer123

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I meant, that I hope the laser to emit < 489nm of light, since I am more fan of blue lasers.
 

The_LED_Museum

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Spectrographic analysis of the replacement laser.



Spectrographic analysis of the replacement laser; spectrometer's response narrowed to a band between 485nm and 495nm to pinpoint wavelength, which is 489.4nm

The raw spectrometer data (tab-delimited that can be loaded into Excel) is at 488poi2.txt
 

The_LED_Museum

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Hello Sir,
I just bought this very laser from the same ebay vendor and accidentally found your thread on here. And speaking of "axis", have you measured the beam divergence of this laser and the 505nm one?
PS: I am hoping to receive a laser that emits nm, and I will try to measure it using the diffraction grating plus ruler method, since spectronometers are a tiny bit too expensive for a student like myself. :geek:
I haven't yet measured the beam divergence; I'll have to find a test location devoid of humans so I can set the equipment up (the "equipment" I'm referring to here simply being the laser itself and a paper target/beam dump set up a known distance away) and perform those measurements.
 




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