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Question about diffraction gratings

sopark4000

sopark4000

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I've been looking around some of the popular optics and laser sites and I have had a hard time finding diffraction gratings that would be suitable for 1W+ lasers. My friend dans cheap green broke recently and he gave me the screw on diffraction gratings that you can spin and I tried passing my LG 532nm labby through it and it melted after about 3 seconds. So does anyone know where to get diffraction gratings that can handle higher powers.

Also if you know any places that sell the plastic ones tell me too because I could use a few of those for my lower power hand held lasers. I appreciate any tips and directions
 





Sigurthr

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Aye, finding quality diffraction gratings is looking to be a pain. I ordered a cheap one off of eBay from Israel a few days ago, no idea if it will withstand the power though. When it arrives, if it does, I will report so. :)
 
sopark4000

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Sounds good
If I find any good ones I'll tell you as well
 
Last edited:
jcranmer

jcranmer

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sopark4000 said:
I've been looking around some of the popular optics and laser sites and I have had a hard time finding diffraction gratings that would be suitable for 1W+ lasers. My friend dans cheap green broke recently and he gave me the screw on diffraction gratings that you can spin and I tried passing my LG 532nm labby through it and it melted after about 3 seconds. So does anyone know where to get diffraction gratings that can handle higher powers.

Also if you know any places that sell the plastic ones tell me too because I could use a few of those for my lower power hand held lasers. I appreciate any tips and directions
Click to expand...

For the cheap plastic ones you can get them over at Cajunlasers or try eBay. Make sure you grab the 13500 lines/mm ones if you want the "starfield" look. The other ones just create a single row of dots.

I have no idea on the high power ones though.
 
Last edited:
Cyparagon

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jcranmer said:
Make sure you grab the 1000 lines/mm ones if you want the "starfield" look. The other ones just create a single row of dots.
Click to expand...

1000lines/mm could be either burst or linear depending on their orientation. If you're talking about the typical rainbow cardboard-slide types, you mean 13500 lines/mm.
 
jcranmer

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Cyparagon said:
1000lines/mm could be either burst or linear depending on their orientation. If you're talking about the typical rainbow cardboard-slide types, you mean 13500 lines/mm.
Click to expand...

Thanks for the catch! You are correct. I was referring to the 13500 lines/mm ones that Clif sales. His 500 and 1000 are the linear ones.
 
sopark4000

sopark4000

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So far the only place that sells gratings capable of withstanding high powers is dragon lasers. Im about to go out but tomorrow I'll probably order them. I was very surprised at how difficult it was to find glass gratings.
 
Bluefan

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jcranmer said:
Thanks for the catch! You are correct. I was referring to the 13500 lines/mm ones that Clif sales. His 500 and 1000 are the linear ones.
Click to expand...

13500 lines/mm can't be right, that would be a 74nm periodocity. The periodicity must be larger than the wavelength or nothing will happen.
 
sopark4000

sopark4000

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Bluefan said:
13500 lines/mm can't be right, that would be a 74nm periodocity. The periodicity must be larger than the wavelength or nothing will happen.
Click to expand...

I think he means line per inch. Some gratings are measured per inch and some per mm which gets annoying as hell when your looking for them.
 
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