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Old 09-18-2016, 12:37 AM #17
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Default Re: Poor boy Diode/Driver Testing Lab

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Originally Posted by Benm View Post
Post back if you find any.

I remember we had quite a bunch of optical components in diafilm slide sized holders, including gratings, polarizers and monochromatic filters. Sadly i have no idea where those came from, but i think they were pretty old even back then. Perhaps produced in the 70s or 80s - not totally sure.
https://www.amazon.com/20pcs-Diffrac...rating+4+angle


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Old 09-19-2016, 12:27 AM #18
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Default Re: Poor boy Diode/Driver Testing Lab

I'm not really sure what those actually are.. '4 angle' seems a bit odd, and there is no mention of the line density or anything like that.

They also look pretty clear to me, while typical gratings are about 50% grey.
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Old 09-19-2016, 12:33 AM #19
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Default Re: Poor boy Diode/Driver Testing Lab

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Originally Posted by Benm View Post
I'm not really sure what those actually are.. '4 angle' seems a bit odd, and there is no mention of the line density or anything like that.

They also look pretty clear to me, while typical gratings are about 50% grey.
Do I want more or less line density?
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Old 09-19-2016, 12:46 AM #20
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Default Re: Poor boy Diode/Driver Testing Lab

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Originally Posted by AaronT View Post
Hobby laser power and spectra testing for less than $150.

Is this what I'm looking for?

https://www.amazon.com/Angle-Diffrac...action+Grating
Not even close. You want a grating that is going to give you a spread from the 0th order maxima to the 1st, 2nd, etc. This will be a grating like the one Benm gave you a link to. The glass ones are the ones that seem gray, while these are clear. Since they are clear, one can use fairly high powers without causing damage to the grating. "High power" is a relative term.

Edit: the cheap glass ones are not etched into the glass, but are overlaid with plastic grating onto the glass.
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Last edited by paul1598419; 09-19-2016 at 01:05 AM.
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