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Publication Citation: Optical Path Difference Measurement Techniques for SLMs

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Author(s): Patrick J. Grother; D P. Casasent;
Title: Optical Path Difference Measurement Techniques for SLMs
Published: March 01, 2001
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 systems. Simple digital processing of the output image for a uniform applied input voltage provides OPD data. Simple methods to confirm amplitude-mostly SLM operations are also provided. Results are presented for Kopin and CRL liquid crystal SLMs.PACS Classification codes - 42.79, 42.62, 42.87/
Citation: Optics Communications
Keywords: liquid crystals;optical path difference;spatial light modulators
Research Areas: Biometrics