Journal
OPTICS EXPRESS
Volume 27, Issue 23, Pages 34463-34471Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.27.034463
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Funding
- National Key R & D Program of China [2018YFF0212302]
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Phase-only liquid crystal spatial light modulator has wide ranging applications that require accurate phase retardance. The phase calibration of the spatial light modulator is therefore of vital importance. Available self-referenced calibration methods face the challenges of high time consumption, low efficiency, and low stability against the conditions. A self-referenced multiple-beam interferometric method is proposed to derive the global grayscale-phase response. As is presented theoretically and experimentally, the proposed method reduces the measuring time and improves the calibration efficiency by encoding multiple fringes in a single hologram. Results also show that the method is equally accurate when compared with traditional two-beam interferometric method, whereas providing a greater robustness against measuring errors since the standard deviation is only 56% of that of the traditional method. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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