Note: Fast, small, accurate 90° rotator for a polarizer.
نویسندگان
چکیده
A permanent magnet stepper motor is modified to hold a dichroic polarizer inside the motor. Rotation of the polarizer by 90° ± 0.04° is accomplished within 80 ms. This device is used for measurements of the intensity ratio for two orthogonal linear polarized components of a light beam. The two selected polarizations can be rapidly alternated to allow for signal drift compensation, and the two selected polarizations are accurately orthogonal.
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عنوان ژورنال:
- The Review of scientific instruments
دوره 82 3 شماره
صفحات -
تاریخ انتشار 2011