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Home made diffraction grating.

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lapompo

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Ok!

I made a diffraction grating and well figured it fits most here since its Home Made :p

heres a video of how it looks in use
http://www.youtube.com/watch?v=LY73d68J_Ps

and if it arises ill make a better "DIY" video than the one I got of it currently :p Don't know if its been made (probably has) but here is mine atleast figured it out all on my own hehe.

enjoy!
 





Hemlock_Mike

Hemlock_Mike

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How did you cut the grating ?? Glass or plastic? I didn't watch the whole video. That's quite a trick to make a grating.

Mike
 
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lapompo

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Hemlock Mike said:
How did you cut the grating ??  Glass or plastic?  I didn't watch the whole video.  That's quite a trick to make a grating.

Mike
Click to expand...

It's plastic used from the clear plastic thingy from DRiver-CD envelope thingys :p I recon it can easily be done with glass aswell =)
 
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691175002

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For those that don't want to watch the entire video, he has placed bits of clear plastic between two sheets so that you can shine a laser through them and produce some random patterns.

I don't know if this is classified as a diffraction grating. A grating takes advantage of interference to create a regular pattern and is generally thousands of very precise lines or dots per inch scribed into a glass or plastic filter.

You can use a diffraction grating to separate light like a prism, measure lights wavelength etc.

This is more of just a textured filter, the assorted bits of plastic between the two sheets bend the light a bit.
 
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lapompo

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691175002 said:
For those that don't want to watch the entire video, he has placed bits of clear plastic between two sheets so that you can shine a laser through them and produce some random patterns.

I don't know if this is classified as a diffraction grating.  A grating takes advantage of interference to create a regular pattern and is generally thousands of very precise lines or dots per inch scribed into a glass or plastic filter.

You can use a diffraction grating to separate light like a prism, measure lights wavelength etc.

This is more of just a textured filter, the assorted bits of plastic between the two sheets bend the light a bit.
Click to expand...

hmmm ye your right :p read up on Diffraction gratings and it doesen't qualify for that :p

but you gave me an idea on how i can make a similar thing only without the randomness :)
 
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hawthori

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lapompo said:
hmmm ye your right :p read up on Diffraction gratings and it doesen't qualify for that :p

but you gave me an idea on how i can make a similar thing only without the randomness :)
Click to expand...
Go on craigslist and find old rear projection tvs people are trying to get rid of. They have large fresnel lenses in them(diffraction grating)
 
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