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-   -   beam shine back into laser system... (http://laserpointerforums.com/f49/beam-shine-back-into-laser-system-33983.html)

WonHungLow 02-18-2009 10:33 PM

beam shine back into laser system...
 
has anyone ever heard of using like a mirror or a dichroic filter as in this post...




http://img407.imageshack.us/img407/5374/dsc01185hn5.jpg





shine back into the laser and cause problems????

Switch 02-19-2009 05:51 PM

Re: beam shine back into laser system...
 
That's completely imposible if the optic is placed at an angle.Maybe one laser shining into the other if you set it up wrong.

ben74 02-20-2009 12:04 PM

Re: beam shine back into laser system...
 
What Switch said. The dichro passes green so the rest of the green would be reflected to the left side of the pic and the same for red but around the other way.

Benm 02-20-2009 11:51 PM

Re: beam shine back into laser system...
 
Quote:

Originally Posted by ben74
What Switch said. The dichro passes green so the rest of the green would be reflected to the left side of the pic and the same for red but around the other way. *

If you set it up properly, the unwanted transmission and reflection will also combine into a (much much weaker) yellow beam 90 degrees of the main beam. No laser should illuminate itself, or the other laser.

andy_con 02-21-2009 09:00 AM

Re: beam shine back into laser system...
 
yes back reflection diectly back into the apeture of a laser can cause damage

Cyparagon 02-21-2009 02:59 PM

Re: beam shine back into laser system...
 
IF it's a direct injection laser and IF it's already being driven high.

tony70516 02-27-2009 03:08 AM

Re: beam shine back into laser system...
 
How'd you make that beam yellow? Really nice (yea sorry a noon question but seriously wanna know!) haha

daguin 02-27-2009 03:44 AM

Re: beam shine back into laser system...
 
Quote:

Originally Posted by tony70516
How'd you make that beam yellow? Really nice (yea sorry a noon question but seriously wanna know!) haha


The little glass cube combines the green light and the red light (red=green=yellow)

Peace,
dave

WonHungLow 03-11-2009 07:37 PM

Re: beam shine back into laser system...
 
yeah i got the color combinations. my RPL style green laser died when doing this, so i wondered if there was any connection. as always thanks dave and everyone else who helped shed some light on the matter. [smiley=beer.gif]

P.S. that's why im looking for a replacement IR diode for it (on another thread).



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