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White Lasers??






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ElektroFreak

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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..
 
k1kb0t

k1kb0t

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ElektroFreak said:
If you ask my camera, my 808nm IR laser is white(ish)..
Click to expand...

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.

Jon
 
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ElektroFreak

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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.
 
GooeyGus

GooeyGus

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I believe CNI now sells an RGB/white handheld. With true 473nm blue :beer:
 
HIMNL9

HIMNL9

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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 :p :D
 
MarioMaster

MarioMaster

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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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ElektroFreak

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The laser is a 473 CNI unit, so it must be something (like a phosphor of some sort) that reacts to the blue light..
 
HIMNL9

HIMNL9

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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 ..... :)
 
Laser_Ben

Laser_Ben

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HIMNL9 said:
^ 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 ..... :)
Click to expand...

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.
 
k1kb0t

k1kb0t

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

Jon
 
Laser_Ben

Laser_Ben

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