white lasers

[LSRFAQ]

having built a white system with 13 lines, using a modulator that can modulate any 8 of them, I can tell you for sure that brown, metallic gold, metallic silver, orange, and TWO LINE white are very possible with 2, 3, and 4 lines.

Older laser show systems used to be 4 scan heads with 488, 514, 568 or 575, and 647, and as each scan head was modulated with a sine, triangle, or squae wave, you could see some really fantastic colors that otherwise did not exist as the images overlapped. Some of these colors were due to pulse response times in the eye as well.

Superbright LED signs are getting to the point that you can see some of the wierd stuff with them, but they really would need a 4th led color to do the full spectrum a laser source can..

I've seen white with just 568 or 575 yellow and 488 blue, deep blue from green and violet and , and a two line white with 476 and 647, a host of other colors that the eyes uneven response curves create, many that you do not see in nature and will never see on a TV or film..

BTW, 488 blue, 568 yellow, and 530 green make a color that shifts from blue to bright white to orange as you change the proportions, even with no red, you can slide the effective color temperature from red orange to white to a hotter then 6200 K white..

Tocket's Chroma Program covers a lot of this and lets you test various combinations..

Steve

 

[Cyparagon]

absolute minimal if any UV or anything for that matter below 480nm as I said previously.

So wikipedia is lying

it is possible to get a sunburn from excess exposure to the UV emitted by an undoped quartz halogen lamp. To reduce unintentional UV exposure, and to contain hot bulb fragments in the event of explosive bulb failure, general-purpose lamps usually have a UV-absorbing glass filter over or around the bulb.

a halogen lamp produces a continuous spectrum of light, from near ultraviolet to deep into the infrared. Since the lamp filament can operate at a higher temperature than a non-halogen lamp, the spectrum is shifted toward blue, producing light with a higher effective color temperature.

My eyes are evidently deficient in some way (as well as my camera) because I see plenty of blue and violet when looking through a diffraction grating at a halogen lamp.

And I suppose these can't even exist because they don't emit blue or violet light:

 

[Burtle]

Buy a top end OSA I'd recommend either an OL770 or Ocean Optics QE65000, test that halogen with or without the so called UV filter then come back to me with what you find.

Your eye is not an optical power meter or spectrum analyser.

Standard household halogen lamps produce very very little UV, if you want UV get a deuterium lamp.

Read what you like on the net, then get a true spectrum of one of these lamps and you will see any light at that end of the spectrum is an order of magnitude or more down.

My information is based on what I have physically done and NOT on "here say" or what I've read on the net. I work for a company who produce optical filters, diffraction gratings and any number of other optical components. When it comes to light sources it's very hard to find one that has continuum light down to 400nm or less. Halogen is definitely inefficient and lacking at the UV end of the spectrum.

 

[LSRFAQ]

21 cfr `1040 , the non ionizing radiation rules, spec that commercial lamps that are UV sources shall be filtered... so if you buy a generic bulb, The filter is in the glass material.. If your lucky, its a upconverter like cerium.. If your not so luckly, it turns it into heat...

Steve

 

[Trevor]

Lasers
633nm Coherent Cube
532nm Coherent Cube
488nm Coherant Cube
405nm Coherant Cube

Coherent Inc. : CUBE

Coherent Inc. : CUBE Fiber Pigtailed

How exactly did you come to possess a 532nm Coherent CUBE? I thought all Coherent CUBE's were diode lasers... :thinking:

Coherent Inc. : Lasers and Laser Systems

-Trevor

 

[andy_con]

not sure of the actual anwser but in general white is no brighter than green

 

[Burtle]

How exactly did you come to possess a 532nm Coherent CUBE? I thought all Coherent CUBE's were diode lasers... :thinking:
-Trevor

I inherited them from my predecessor, and yes your right, the Cube lasers are all diode lasers. I hadn't even thought about it. :thinking:

I'll go and check it out again, I know they will build to order if requested.

 

[Cyparagon]

any light at that end of the spectrum is an order of magnitude or more down.

Oh, there's a LOT more red than blue, I'm not saying there isn't. But there IS blue there. If there wasn't, incandescent black lights could not exist.

Your eye is not an optical power meter or spectrum analyser.

Of course not, but anybody here will tell you that 480nm and higher doesn't look like violet.

 

[Neyluzz]

Brown laser? Wow, that would be cool. Although it isn't the nicest color I've seen.

 

[TheTeslaWarrior]

you need all of them to get true white but you can mimic white with just three

 

[Trevor]

He never said anything more about that 532nm cube... :thinking:

Pics or it didn't happen.

-Trevor

 

[laserboystuart]

Pics or it didn't happen.

i can't say how many times i've heard them words. it makes me laugh everytime someone writes it!

stuart

 

[Tech_Junkie]

i can't say how many times i've heard them words. it makes me laugh everytime someone writes it!

stuart

Its a good tool to find out if its BS or fact.

 

[laserboystuart]

Its a good tool to find out if its BS or fact.

yes i suppose it is!

stuart