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Old 02-28-2008, 04:47 PM #1
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Default yellow

hi there i have conflicting information on the ratio to make yellow, would 20mw green and 200mw red make a nice vibrant yellow?


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Old 02-28-2008, 05:03 PM #2
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Default Re: yellow

From ebay listings I have found the following mixes....
Laser: Red 200mW & Green 60mW
CONSISTS OF 100MW RED 40MW GREEN AND BLENDED 140-150MW OF YELLOW
Output power: Red 80mW 650nm, Green 40mW 532nm
Output power: 40mW@532nm, 80mW@650nm, Green and Red DPSS laser.
Three-Color Laser: R:200mW@650nm G:80mW@532nm Y:280mW Mixed Yellow
..........so who knows :-/

so that is
3.5 to 1, 2.5 to 1, 2 to 1, 2 to 1 and 1.5 to 1 (all red then green)

Someone may yet come up with a difinitive answer....

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Old 02-28-2008, 05:33 PM #3
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Default Re: yellow

red to green is 3:1

but i find it more like 4:1
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Old 02-28-2008, 06:44 PM #4
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Default Re: yellow

Quote:
but i find it more like 4:1
I bow to Andy's greater experience, that appears to make 200 red to 50 green about right... I can only say that I have found much lower power green works well....

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Old 02-28-2008, 07:58 PM #5
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Default Re: yellow

sadly not everything i say is correct.

get analogue then you wont have any problems
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Old 02-28-2008, 08:15 PM #6
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Default Re: yellow

The ratio is also different with shorter wavelength reds (635nm) which appear much brighter than 660nm. You might be able to get away with a 2:1 ratio. The beam diameter is much larger however making it more difficult to blend colors. Go with analog like Andy said.
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Old 02-28-2008, 08:22 PM #7
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Default Re: yellow

I am planning on making a cheap yellow so the green is deal exteame but i will remove the module and make my own driver so it will be analogue and my red phazor will be variable aswell - as i think it is pertaining to laser shows i will link you to my project, the getto spirograph http://www.laserpointerforums.com/fo...num=1203878858 (oh yer it feels good to be able to post links)
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Old 02-28-2008, 09:20 PM #8
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Default Re: yellow

guys this is the best driver out there and cheap at only 20

http://www.laser-man.co.uk/2006/inde...&Itemid=31
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