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Thread: Can a sand coloured lense letting IR and UV light?

  1. #1 Can a sand coloured lense letting IR and UV light? 
    Forum Cosmic Wizard icewendigo's Avatar
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    Can a sand coloured lens let IR and UV light through?

    We usually see transparent camera lenses, if you had a IR and UV camera, could you have a lense that was sand colored, thus appear to not be transparent like a polished clay disk,
    while letting all IR and UV light through?


    Last edited by icewendigo; August 20th, 2013 at 02:23 PM. Reason: cant edit the title :/
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  3. #2  
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    Quote Originally Posted by icewendigo View Post
    We usually see transparent camera lenses, if you had a IR and UV camera, could you have a lense that was sand colored, thus appear to not be transparent like a polished clay disk,
    while letting all IR and UV light through?
    If you are asking "could you have a lens that was opaque to visible light but transparent to IR and UV light" the answer is - sorta. Typical glass doesn't pass UV at wavelengths below 350nm so you can't get _much_ UV through, but you can get some. It will also pass IR.

    The challenge, then, is to find a filter that will pass UV and IR but block 400-800nm light. You could probably do this with a set of dichroic filters although then one side would look like a mirror.


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    Forum Ph.D.
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    silicon is opaque to vis lets a portion of ir thru
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    Theatre Whore babe's Avatar
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    More interested in regards to sunglasses, because I have to use major protective sunglasses when outside..
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  6. #5  
    Forum Ph.D.
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    dumb question -bye-have a nice day
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