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Old 09-30-2008, 09:49 AM #1
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Default IR Collimator

Hi I have built a 600mW 808nm IR laser, the diode itself is a TO-3 open can type, but a simple laser pointer type lens just collimates the beam to a diverging line, what other optics do i require to correct this?


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Old 09-30-2008, 07:14 PM #2
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Default Re: IR Collimator

Its always going to diverge some, but if you let the beam expand a little before you collimate it, it will be less diverging. In my 2w laser, I used an old telescope eyepiece to collimate it, the focal length is about 1.25 inches. try using a lens that allows it to expand a bit before collimation. the more it expands, the more collimated the beam will be, but the bigger around it will be, my beam is about a half inch in dia. but it looks awesome at 2.2 watts! 8-)

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Old 09-30-2008, 08:44 PM #3
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Default Re: IR Collimator

here http://www.edmundoptics.com/onlineca...productID=2052
I'd give them a*toll free call to talk with a technician. BTW NIR stands for Near Infrared.
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Old 10-01-2008, 01:43 PM #4
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Default Re: IR Collimator

thanks peeps, i know what NIR stands for lol, & i have discovered i need a fast axis collimator to correct this, i will give the old telescope optics trick a try however, as i cannot afford such a complex bit of optics at the moment
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