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Thread: Anamorphic prism shenanigans

  1. #1
    Join Date
    Apr 2009
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    Default Anamorphic prism shenanigans

    Greetings, my fellow laseristas;

    I have a question about prisms: is the following "legal"?

    Click image for larger version. 

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    In other words, if I tilt the final prism a hair, can I get it to steer without wrecking the beam correction I'm going for?

    Thanks…Mike
    Runs with Lasers

  2. #2
    Join Date
    Feb 2011
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    New Hampshire
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    Default

    Yes, I used to do it all the time when I used more prisms for 445nm beam magnification. The prism does not create any type of angle related distortion. It is just a mater of angle related magnification that is even across the beam. The reflective loss from the prisms grows with the angle of incidence and so by dividing the magnification between the two prisms this is minimized and the beam can be sent through with no deviation, but this is not a requirement. As a side note, these prisms and telescopes don't really "correct" the beam. They trade near field beam diameter for far field divergence.

  3. #3
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    Jun 2010
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    Australia
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    Quote Originally Posted by planters View Post
    As a side note, these prisms and telescopes don't really "correct" the beam. They trade near field beam diameter for far field divergence.
    I love your little gems such as this one. Easy to remember.
    This space for rent.

  4. #4
    Join Date
    Apr 2009
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    North of Jackson Michigan USA
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    Default

    Gotcha; much thanks.
    Great explanation.

    I might also be moving the Stanwax board to the other side of the plate; still working on it.

    …Mike
    Runs with Lasers

  5. #5
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    Vezon, Belgium
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    communicating vessels... life is made out of them actually...

  6. #6

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    Actually, in kinetic lighting one often does little tricks like thing to add additional movement. Ideally I want as many bits of control as possible. - now that I'm beginning to use lasers I am seeing that a lot of the same stuff can be applied but in some cases one ones have to consider whether image detail is as important as effect

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