Old 06-22-2009, 06:29 PM #17
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Talking Re: White Lasers??

Take a guess!


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Old 06-22-2009, 06:30 PM #18
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Default Re: White Lasers??

Filament?

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Old 06-22-2009, 06:34 PM #19
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Default Re: White Lasers??

Deuterium-Tritium Pellet?
Pubic Hair?
Rare piece of fossilized dinosaur dung?
Microscopic piece of the sun?

I don't know.. those are just the only scientific-type things I could think of..
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Old 06-22-2009, 07:25 PM #20
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Default Re: White Lasers??

Quote:
Originally Posted by ElektroFreak View Post
Deuterium-Tritium Pellet?
Pubic Hair?
Rare piece of fossilized dinosaur dung?
Microscopic piece of the sun?

I don't know.. those are just the only scientific-type things I could think of..
Lol, pubic hair :P
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Old 06-22-2009, 08:01 PM #21
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Default Re: White Lasers??

Phosphor?
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Old 06-22-2009, 08:06 PM #22
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Default Re: White Lasers??

If you ask my camera, my 808nm IR laser is white(ish)..
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Old 06-22-2009, 09:20 PM #23
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Default Re: White Lasers??

Quote:
Originally Posted by ElektroFreak View Post
If you ask my camera, my 808nm IR laser is white(ish)..
EF I'm curious about this, is that a video camera or still camera? I know many have said they can see the beam on the camera's display but after they take the picture they don't see the beam. I also remember a video where you could clearly see the IR as a big spotlight when he pointed it a target, never saw a beam shot. Just curious about what camera you are using.

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Old 06-22-2009, 10:03 PM #24
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Default Re: White Lasers??

Just my old (now dead) camera. It was a Casio EX-Z1000..

Lots of digital cameras can "see" IR. Most likely if you use your camera phone or digital camera it will see IR no problem. Typically it appears white/purplish.

There are some cameras that have good IR filtering built in. Those can't see IR, but they are somewhat less common than the non-IR filtered variety.
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Old 06-22-2009, 10:29 PM #25
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Default Re: White Lasers??

I believe CNI now sells an RGB/white handheld. With true 473nm blue
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Old 06-23-2009, 02:35 PM #26
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Talking Re: White Lasers??

Uhm, about the pic posted from Laser-Ben, let me do the devil's advocate, just for the fun.

..... in the tweezers, there's photoshop ? .....

j/k
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Old 06-23-2009, 05:23 PM #27
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Default Re: White Lasers??

Nah I checked, it's not photoshop - so it must be something along the lines of something that gives off white light or the camera is being fooled by IR
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Old 06-23-2009, 05:28 PM #28
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Default Re: White Lasers??

The laser is a 473 CNI unit, so it must be something (like a phosphor of some sort) that reacts to the blue light..
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Old 06-23-2009, 06:41 PM #29
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Lightbulb Re: White Lasers??

^ Like those high-intensity white leds ?

After all, they're white just cause the uv chip excite the little dome of high efficency phosphor deposed over the chip, so .....
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Old 06-23-2009, 09:03 PM #30
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Default Re: White Lasers??

Quote:
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^ Like those high-intensity white leds ?

After all, they're white just cause the uv chip excite the little dome of high efficency phosphor deposed over the chip, so .....
Bing Bing Bing! YOU WIN!!!'

It's a tiny Ge:YAG phosphor plate. They come from lumileds. This was just never installed on a LED.

You are pretty close about how the LED work, a couple things to note though. The LED die is emtting around 430-440nm peak in a white LED, this is where the blue part of the white comes from, a controlled amount of blue leaks through. The phosphor is actually a flat plate that is bonded to the top of the LED die, its flat and a couple hundred microns thick.
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Old 06-23-2009, 09:11 PM #31
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Default Re: White Lasers??

Where did you get that phospher pate LB? That is a pretty sweet picture.

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Old 06-23-2009, 09:20 PM #32
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Default Re: White Lasers??

Let me put it this way, a very close family member is Vice President of Research and Development at Lumileds.
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