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4hv.org :: Forums :: Electromagnetic Radiation
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405nm laser and uranium glass marbles

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radhoo
Tue Dec 14 2010, 11:27PM Print
radhoo Registered Member #1938 Joined: Sun Jan 25 2009, 12:44PM
Location: Romania
Posts: 699
Since we're getting closer to the winter holidays, and we're used to see little lights all around, here's another picture with uranium glass green fluorescence, when illuminated by UV:

1292369261 1938 FT0 Dsc 30832


The "normal" glass color: Link2
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dmg
Fri Dec 17 2010, 08:20PM
dmg Registered Member #2628 Joined: Fri Jan 15 2010, 12:23AM
Location:
Posts: 627
Thats pretty cool, where did you get the 402nM laser from? all pens I see are 405
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radhoo
Tue Dec 21 2010, 08:10AM
radhoo Registered Member #1938 Joined: Sun Jan 25 2009, 12:44PM
Location: Romania
Posts: 699
You are right, I've corrected the typo.
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dmg
Tue Dec 21 2010, 03:11PM
dmg Registered Member #2628 Joined: Fri Jan 15 2010, 12:23AM
Location:
Posts: 627
aww... sad

I started to get my hopes up...
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Conundrum
Wed Dec 22 2010, 07:37AM
Conundrum Registered Member #96 Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4059
hmm, don't 405nm lasers change wavelength when cooled down?
402nm might be possible at like -30 Celsius.
(cough peltier cascade /cough)

-A
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dmg
Wed Dec 22 2010, 01:54PM
dmg Registered Member #2628 Joined: Fri Jan 15 2010, 12:23AM
Location:
Posts: 627
Eh, Ill try that out for fun, see if there is any noticable differance.
peltier shmeltier, Ill just put it outside for an hour... its already -35C anyway..
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Meatball
Wed Dec 22 2010, 06:11PM
Meatball Registered Member #2401 Joined: Mon Sept 28 2009, 04:25PM
Location:
Posts: 74
405nm diodes actually vary quite a bit. I had a 12X that lased at 408nm, and a PHR that lased at 401nm. The 12X was noticeably brighter, even at lower powers. You could drop that diode in a glass of distilled water, that's a nice way to heatsink it. Just make sure you clean the diode window afterwards.
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dmg
Wed Dec 22 2010, 08:05PM
dmg Registered Member #2628 Joined: Fri Jan 15 2010, 12:23AM
Location:
Posts: 627
Ive got a few PHRs around, I suppose I can try that too later.
are you on LPF Meatball?
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Meatball
Wed Dec 22 2010, 10:04PM
Meatball Registered Member #2401 Joined: Mon Sept 28 2009, 04:25PM
Location:
Posts: 74
Yep. You?

Here's one thread I found, but I can't seem to find the thread where a LOC was dunked.

Link2
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dmg
Wed Dec 22 2010, 10:05PM
dmg Registered Member #2628 Joined: Fri Jan 15 2010, 12:23AM
Location:
Posts: 627
yep, im GBD there..

wouldn't doing this with a C-mount as shown wreck the die if water got on it?
(water will cause COD?)
well, I dont have any C-mounts anyway, but was just wondering.
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