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Old 10-27-2008, 04:26 AM #1
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Default White Laser Pointer - Need Info/Help

Hi,
I know this question was discussed at least once on these forums, but I wasn't able to find it.
I'm debating on creating a white laser pointer depending on the degree of difficulty and overall cost.
I have heard of ppl speaking of it using an RGB setup or Yellow-Violet setup, but dont know the exact nm that needs to be present to create a perfect white light.
I have heard of rules that apply such as the 2-4-6 rule, but it was too brief of a statement to understand the full rule.

I was wondering what would it take to make one.
If there are more than one option, what option would that be? (RGB, yellow/violet, etc.)

Aoi


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Old 10-27-2008, 05:07 AM #2
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Default Re: White Laser Pointer - Need Info/Help

i think there was someone on photon-lexicon a while back who made a "white" pointer with a red diode, a green module, and a violet diode, but cramming the optics in a portable made the quality fairly poor and the colors seperated after only a few feet - but it was a good bit of "proof of concept"

for lasershow scanners if you have 650nm red and 473nm for blue, the ratio is 1:2:4 for green blue and red, you'll probably need more violet than 473nm since 405nm is pretty close to the edge of the visible spectrum

for parts you're gonna be needing of course the 3 colors of lasers, as well as either dichros or some kind of glass components to combine the beams
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Old 10-27-2008, 06:37 AM #3
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Default Re: White Laser Pointer - Need Info/Help

Quote:
Originally Posted by MarioMaster
i think there was someone on photon-lexicon a while back who made a "white" pointer with a red diode, a green module, and a violet diode, but cramming the optics in a portable made the quality fairly poor and the colors seperated after only a few feet - but it was a good bit of "proof of concept"

for lasershow scanners if you have 650nm red and 473nm for blue, the ratio is 1:2:4 for green blue and red, you'll probably need more violet than 473nm since 405nm is pretty close to the edge of the visible spectrum

for parts you're gonna be needing of course the 3 colors of lasers, as well as either dichros or some kind of glass components to combine the beams

Awesome... helps me go through some of the pre-troubleshooting that will occur.
I have a friend who works in the optical industry and is willing to help me out with some glass cutting so there is no worry on that, but after your post I think I would use multiple adjustable mirrors/glasses to get the beams to be perfect from as far of a distance I can go.

So for the ratio of 1:2:4 for G-B-R, would that be changed if I were to use a 405nm instead of the 473nm?


well now I know what will be the hardest thing will be... alignment.

Aoi
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Old 10-27-2008, 10:22 AM #4
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Default Re: White Laser Pointer - Need Info/Help

Quote:
Originally Posted by MarioMaster
i think there was someone on photon-lexicon a while back who made a "white" pointer with a red diode, a green module, and a violet diode, but cramming the optics in a portable made the quality fairly poor and the colors seperated after only a few feet - but it was a good bit of "proof of concept"

for lasershow scanners if you have 650nm red and 473nm for blue, the ratio is 1:2:4 for green blue and red, you'll probably need more violet than 473nm since 405nm is pretty close to the edge of the visible spectrum

for parts you're gonna be needing of course the 3 colors of lasers, as well as either dichros or some kind of glass components to combine the beams
You mean this guy --> http://www.youtube.com/watch?v=IBRNPQWJk5I

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Old 10-27-2008, 01:26 PM #5
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Default Re: White Laser Pointer - Need Info/Help

If I would have the time and money I know how I'd go about doing it:
1) Get the modules + adjustable drivers
2) Get the optics (dichros, pbs cubes , whatever)
3) allign them perfectly on the breadboard
4) find ideal ratio using the adjustable drivers
5) allign them perfectly on a slim custom made chassis with drivers, switches and everything
6) stick in into a tube housing and cover it with an aperture cap with a little glass lens so you don't ever never have to clean up the ton of optics inside. :P

That seems like a plan. Might also want to fool around with divergence and beam diameter. :P
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Old 10-27-2008, 01:47 PM #6
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Default Re: White Laser Pointer - Need Info/Help



that was done by mecheng3 from pl

and sold to allthatwhichis
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Old 10-27-2008, 02:08 PM #7
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Default Re: White Laser Pointer - Need Info/Help

wow.. this is going to be one huge and awesome build.
I'm already trying to draw out a perfect host for this build.
Still in concept stage as I have to determine the full details concerning custom lenses, custom drivers, and what kind of batteries to use that will power this fun project of mine.
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Old 10-27-2008, 02:18 PM #8
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Default Re: White Laser Pointer - Need Info/Help

Here's mine with the turning mirrors from a DVD and ps3 sled. Kinda hard to fit in a pointer. :-/
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Old 10-27-2008, 04:29 PM #9
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Default Re: White Laser Pointer - Need Info/Help

yes but with this layout you could do the same as the above and use 2 front surface mirrors and get the lasers all in a line


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Old 10-27-2008, 08:58 PM #10
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Default Re: White Laser Pointer - Need Info/Help

What exactly is a front surface mirror?
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Old 10-27-2008, 09:07 PM #11
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Default Re: White Laser Pointer - Need Info/Help

Quote:
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What exactly is a front surface mirror?
The shiny part is on the first surface (front) instead of on the back surface like normal mirrors. This eliminates secondary reflections from the front surface of the glass competing with the reflected light off of the shiny surface.

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Old 10-27-2008, 09:37 PM #12
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Default Re: White Laser Pointer - Need Info/Help

So all i need is a blu-ray a green module and a dvd red laser and i can create a white laser? How much would 2 front surface mirrors cost for the combining of the three colors?
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Old 10-27-2008, 10:18 PM #13
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Default Re: White Laser Pointer - Need Info/Help

It wouldn't be "true" white, but what defines true white? Quite an abitious project, have you concidered trying an RGY pointer first?
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Old 10-27-2008, 10:29 PM #14
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Default Re: White Laser Pointer - Need Info/Help

I did consider one of rog's mods for a yellow pointer, but im buying a blue ray soon and a red laser is about 30 for a 20X and im not sure what a decent green mod is. I think Dx or aixis sells green labby's. I know its not true whit but it would be a fun project. It would be red/green/blu-ray/pink/yellow/white laser
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Old 10-28-2008, 12:40 AM #15
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Default Re: White Laser Pointer - Need Info/Help

Good luck getting it in a portable! Sounds awesome.
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Old 10-28-2008, 01:41 AM #16
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Default Re: White Laser Pointer - Need Info/Help

Not really interested in portability actually.
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