Abstract
A simple measurement method to obtain 2-D spatial point-by-point optical path difference (OPD) data for spatial light modulators (SLMs) is described. A simple imaging system is used that allows measurements of all SLM parameters on the same laboratory system. Simple digital processing of the output image for a uniform applied input voltage provides OPD data. Simple methods to confirm amplitude-mostly SLM operation are also provided. Results are presented for Kopin and CRL liquid crystal SLMs.
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