A 16-beam grating-based division-of-amplitude photopolarimeter that employs a
transmission grating and a linear photodiode detector array has been developed
and tested. The transmission grating splits the incident light beam into 16
orders with essentially uniform intensity distribution. Linear polarizers are
placed in fanned-out azimuth orientations in different orders, and a
quarter-wave retarder is inserted in one order. After calibration, the
photopolarimeter makes time-resolved measurements of all the Stokes parameters
of the incident light with a precision of 0.001. The calibration and testing of
the system at 632.8 nm are presented.
© 1996 Optical Society of America
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