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  • errors in optics

    From RichD@21:1/5 to All on Tue Jul 30 10:16:09 2019
    I'm not an optician, but occasionally drop in to optics
    seminars. Something strikes me as odd, time and again.

    When presenting their lab bench experiments, they seldom
    mention errors or approximations, Every beam splitter
    is exactly 50-50, every mirror is exactly 30*, etc.

    In electric circuits, error and noise are inherent,
    cannot be neglected. Is it really possible to play this way,
    in an optics lab?

    --
    Rich

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  • From Phil Hobbs@21:1/5 to RichD on Tue Jul 30 16:33:36 2019
    On 7/30/19 1:16 PM, RichD wrote:
    I'm not an optician, but occasionally drop in to optics
    seminars. Something strikes me as odd, time and again.

    When presenting their lab bench experiments, they seldom
    mention errors or approximations, Every beam splitter
    is exactly 50-50, every mirror is exactly 30*, etc.

    In electric circuits, error and noise are inherent,
    cannot be neglected. Is it really possible to play this way,
    in an optics lab?

    --
    Rich


    Depends. There are a lot of poorly-controlled variables in an optical
    system, due especially to etalon fringes, and things like beam splitting
    ratios depend on angles of incidence, polarization, and so on.

    There aren't a lot of 1% tolerances in optics.

    Cheers

    Phil Hobbs

    --
    Dr Philip C D Hobbs
    Principal Consultant
    ElectroOptical Innovations LLC / Hobbs ElectroOptics
    Optics, Electro-optics, Photonics, Analog Electronics
    Briarcliff Manor NY 10510

    http://electrooptical.net
    http://hobbs-eo.com

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