405nm laser and uranium glass marbles
radhoo, Tue Dec 14 2010, 11:27PMSince 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:
The "normal" glass color:
Re: 405nm laser and uranium glass marbles
dmg, Fri Dec 17 2010, 08:20PM
Thats pretty cool, where did you get the 402nM laser from? all pens I see are 405
dmg, Fri Dec 17 2010, 08:20PM
Thats pretty cool, where did you get the 402nM laser from? all pens I see are 405
Re: 405nm laser and uranium glass marbles
radhoo, Tue Dec 21 2010, 08:10AM
You are right, I've corrected the typo.
radhoo, Tue Dec 21 2010, 08:10AM
You are right, I've corrected the typo.
Re: 405nm laser and uranium glass marbles
dmg, Tue Dec 21 2010, 03:11PM
aww...
I started to get my hopes up...
dmg, Tue Dec 21 2010, 03:11PM
aww...
I started to get my hopes up...
Re: 405nm laser and uranium glass marbles
Conundrum, Wed Dec 22 2010, 07:37AM
hmm, don't 405nm lasers change wavelength when cooled down?
402nm might be possible at like -30 Celsius.
(cough peltier cascade /cough)
-A
Conundrum, Wed Dec 22 2010, 07:37AM
hmm, don't 405nm lasers change wavelength when cooled down?
402nm might be possible at like -30 Celsius.
(cough peltier cascade /cough)
-A
Re: 405nm laser and uranium glass marbles
dmg, Wed Dec 22 2010, 01:54PM
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..
dmg, Wed Dec 22 2010, 01:54PM
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..
Re: 405nm laser and uranium glass marbles
Meatball, Wed Dec 22 2010, 06:11PM
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.
Meatball, Wed Dec 22 2010, 06:11PM
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.
Re: 405nm laser and uranium glass marbles
dmg, Wed Dec 22 2010, 08:05PM
Ive got a few PHRs around, I suppose I can try that too later.
are you on LPF Meatball?
dmg, Wed Dec 22 2010, 08:05PM
Ive got a few PHRs around, I suppose I can try that too later.
are you on LPF Meatball?
Re: 405nm laser and uranium glass marbles
Meatball, Wed Dec 22 2010, 10:04PM
Yep. You?
Here's one thread I found, but I can't seem to find the thread where a LOC was dunked.
Meatball, Wed Dec 22 2010, 10:04PM
Yep. You?
Here's one thread I found, but I can't seem to find the thread where a LOC was dunked.
Re: 405nm laser and uranium glass marbles
dmg, Wed Dec 22 2010, 10:05PM
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.
dmg, Wed Dec 22 2010, 10:05PM
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.
Re: 405nm laser and uranium glass marbles
Conundrum, Thu Dec 23 2010, 07:59AM
hmm.
On a side note, does anyone happen to have any "small" i.e. 5cm*5cm Peltiers?
i am trying to make a cascade but i only have two sizes, 12cm and 8cm from defunct camping fridges.
thanks, -A
Conundrum, Thu Dec 23 2010, 07:59AM
hmm.
On a side note, does anyone happen to have any "small" i.e. 5cm*5cm Peltiers?
i am trying to make a cascade but i only have two sizes, 12cm and 8cm from defunct camping fridges.
thanks, -A
Re: 405nm laser and uranium glass marbles
Proud Mary, Mon Dec 27 2010, 02:08PM
The Austrian firm Roithner Laser Technik sell 395nm 50mW laser diodes, and single and multi-chip power UV LEDs down to 350nm.
Just remember that a cup of mocha with a slice of fresh cream cake costs good money in Vienna!
Proud Mary, Mon Dec 27 2010, 02:08PM
The Austrian firm Roithner Laser Technik sell 395nm 50mW laser diodes, and single and multi-chip power UV LEDs down to 350nm.
Just remember that a cup of mocha with a slice of fresh cream cake costs good money in Vienna!
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