Anyone made a white laser?

I was looking at some websites and it seems we have red, green and blue lasers. It occured to me, we have the makings of producing white light.

Just wondering.

Most RGB laser projectors have the capability to do white light. They have a 3 lasers in them, R, G, and B and when combined they make white. I hear the best ratio of color is 4 parts red at 671nm, 1 part green, 532, and 1 part blue, 488 or 473, there was a small discussion about which is the best blue. Some have said 514 is a better green also, but... :shrug: I also read that ratios are BS, you use what ever "looks" like good white.

Lasers used in projectors are oneof two types, or can be modulated in two ways, ttl (no idea what it stands for) and analogue. TTL uses a +/-5volt signal to turn the laser on or off. Analogue... I think used +/-5 volts to turn the laser's power up and down gradually. A 100mW laser could go from 10mW, 15, 20, 30, 50, 75, 100... A ttl projector can do "7" laser colors, R, G, B, additive colrs, and Yellow, Cyan, Magenta, subtractive colors, and White, all colors. An analoge projector can use varying degrees of all 6 additive and subtractive colors to sumulate any color, up to 16 or so million. :candle: And white...

allthatwhichis said:

Lasers used in projectors are oneof two types, or can be modulated in two ways, ttl (no idea what it stands for) and analogue. TTL uses a +/-5volt signal to turn the laser on or off.

Click to expand...

"TTL" = Transistor-Transistor Logic. This means it's a binary input, on or off (0 or 1). +5V is its characteristic Vcc. Most digital hardware uses TTL voltage. CPU's since the Pentium 90 or so have been using lower voltages. A Core 2 Duo running TTL voltage would go nova...

You can have one single laser emit white light. Krypton lasers do just that.

Also, combining different color lasers to produce white is not that difficult. You just need some dichroic mirrors, and their alignment is not that hard if you have the appropriate equipment . It's a fun project too :naughty:

My white light laser has an output of 5 watts it is a mixture of Krypton and Argon gas

The helium-cadmium vapor system can also produce RGB white light from one laser, and the wavelengths are well placed for color work, but they are rare and finicky critters and I have not seen any recent information on who might be currently making them (and if they are being made at all, the green/blue DPSS /red diode laser combos pretty much guarantee their extinction).

Ragnarok

I made a lil white light day before yesterday...



Poor color balance and alignment...



I need to get a LOT more red... I could get some more if some of ya'll would buy something from my FS thread... :lolsign:

I have found it's eaiser to mix colors when scanning. I also split the green... and pointed em all towards the motorized mirror and got a nice white in the cornor of my ceilling.






It's probably a 40mW R, 20mW G, 50mW B mix...

I got a friend who let me borrow his cheap wal mart fog machine, but he forgot the juice... Called him a minute ago and told him to carry his ***... Maybe I need the fog ready before the DAC will carry it's ***... :candle: Until then this is the only scanning I can do... And I need the fogger to enjoy it better.

Actually there is a type of laser white a highly coliminated beam and a wide spectrum with the utterly cool name called a 'Super Continuum Laser'.
Quickly googling came up with:
http://www.lg-lasertechnologies.com/Menu/Products/Super-Continuum+laser+source
and
http://www.rp-photonics.com/supercontinuum_generation.html

Phil