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Old 07-28-2009, 09:33 AM #1
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Default 635nm Vs 640nm in RGB projector

Hi Guys:

Here is a demo of 635nm red versus 640nm red in a RGB projector.

I had a Laserwave 400mw 635nm laser in my RGB. Notice the fatness of the red beam, and the red splash projecting up from the top mirror because the red beam was larger than the scanner mirrors.

YouTube - My RGB 700mw projector part 2


Now look at this video with no red splash coming off the Y mirror and a more narrow red beam using a Laserwave 400mw 640nm labby.


Imageshack - l1090705mov - Uploaded by docjohn

Nothing else was changed in the RGB other than the red laser. To me 635 red is BB (bright and beautiful) for beams but NSG (not so great) for graphics I got red spill in graphics on either side of any line calling for red.

Yes, I am too anal.

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Old 07-28-2009, 12:15 PM #2
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Default Re: 635nm Vs 640nm in RGB projector

That's stunning John! I think Marc (GottaLuvLasers) posted some demo pics of the new 640 series from Laser-wave over on PL. I was amazed with the beam specs, simply amazing. I know what I'll be putting in my projector!
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Old 07-28-2009, 01:57 PM #3
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Default Re: 635nm Vs 640nm in RGB projector

I feel your pain.. I have a 300mW 650nm CNI in my RGB, and I love the deep red color, but the beam is so big that I lose about 1/3 of its power from the spill since the beam is larger than the mirrors. I'm surprised that two multimode diode based lasers from the same company would have such different beam specs. I wouldn't think there would be much (if any) noticeable difference in hues over a 5nm difference in wavelength.. Which was the costlier unit?
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Old 07-28-2009, 02:37 PM #4
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Default Re: 635nm Vs 640nm in RGB projector

Quote:
Originally Posted by diachi View Post
That's stunning John! I think Marc (GottaLuvLasers) posted some demo pics of the new 640 series from Laser-wave over on PL. I was amazed with the beam specs, simply amazing. I know what I'll be putting in my projector!

Roger that. I got the 640 from Marc
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Old 07-28-2009, 02:42 PM #5
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Default Re: 635nm Vs 640nm in RGB projector

Quote:
Originally Posted by ElektroFreak View Post
I feel your pain.. I have a 300mW 650nm CNI in my RGB, and I love the deep red color, but the beam is so big that I lose about 1/3 of its power from the spill since the beam is larger than the mirrors. I'm surprised that two multimode diode based lasers from the same company would have such different beam specs. I wouldn't think there would be much (if any) noticeable difference in hues over a 5nm difference in wavelength.. Which was the costlier unit?
Hi EF:


They use very different diodes. The new 640nm one is more expensive.

Marc sells them here.

COMPONENTS
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Old 07-28-2009, 02:59 PM #6
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Default Re: 635nm Vs 640nm in RGB projector

^very nice.. I'll have to check one of those out one day. They look awesome, but they're a tad costly for a red unit. I'm sure it's worth it for the beam quality.
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