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Thread: reflection of a prism

  1. #11
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    If you're directing the beam "through the glass" (by the looks of it from the diagram) you'll get more losses. (e.g. BK7 > SF2 etc.) [Anamorphic prism losses sound familiar?]
    Why not aim onto the hypotenuse (input = west) (with an AR coating spec'd for 45 deg AOI) and output = north?
    This will reduce you losses by quite a large margin.
    I can't honestly think of reason why you'd want to have that optic used as a pure prism, rather than a 45deg mirror.

    Lasertack sell these prism mirrors in his shop if you need to test them.
    - There is no such word as "can't" -
    - 60% of the time it works every time -

  2. #12
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    See below......


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  3. #13
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    Lasertec sell them in the wrong size and i buy optics in general directly from factory in bigger quantity. If input and output surfaces have AR coating the losses are very low. You can see in the Picture from Losquared the beam is totally reflected. Its a good suggestion to reflect on the hypotonese.


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  4. #14
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    Quote Originally Posted by edison View Post
    Lasertec sell them in the wrong size and i buy optics in general directly from factory in bigger quantity. If input and output surfaces have AR coating the losses are very low. You can see in the Picture from Losquared the beam is totally reflected. Its a good suggestion to reflect on the hypotonese.
    Johan,
    Nothing to stop you doing it that way, but your losses will be greater.
    - There is no such word as "can't" -
    - 60% of the time it works every time -

  5. #15
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    I will do some measurents to see how bad it is. If its only a few mw i will accept it. Its always less then an O-like lens for blue , clipping by knivedging, or using prismpairs i,m sure Losquared shows that it works so that is cool. It probably have the same losses as a broadband PBS cube and with 9 watt that ads up.

    Maybe i will go with your suggestion we will see. First cashflow and that will be a challence now that most people buy rather from eightonlight instead of building their own these days


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  6. #16
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    I decided to go with a high reflective coating on the hypotunese. So a big 10x10x10 knivedge mirror in a way.

    Thanks for the help guys


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