yellow

[polop]

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

 

[rog8811]

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....

Regards rog8811

 

[andy_con]

red to green is 3:1

but i find it more like 4:1

 

[rog8811]

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....

regards rog8811

 

[andy_con]

sadly not everything i say is correct.

get analogue then you wont have any problems

 

[yobresal]

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.

 

[polop]

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/forums/YaBB.pl?num=1203878858 (oh yer it feels good to be able to post links)

 

[andy_con]

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

http://www.laser-man.co.uk/2006/index.php?option=com_content&task=view&id=20&Itemid=31