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Thread: optics

  1. #11
    Join Date
    Nov 2008
    Location
    Cleveland Ohio
    Posts
    2,599

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    Thanks. Not chasing shg on this setup. It’s sum difference. But most of that applies. I will check it out today and it think your right on the interferometer. That could be half the problem.

  2. #12
    Join Date
    Jun 2009
    Location
    Mesa, AZ
    Posts
    1,277

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    I've done that before to characterize hologram optical elements for diffraction efficiency vs. angle. Fixed input beam, HOE mounted on axis of a motor-driven rotation stage, arm with detector mounted on another motor-driven rotation stage (both axis' of rotation collinear), with the detector stage driven twice as fast as the first.

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