Self-distortion compensation of spatial light modulator under temperature-varying conditions

Spatial Light Modulators
Misc.: Speckle / Characterization / Metrology
Published on:
Authors: Takiguchi, Yu; Otsu, Tomoko; Inoue, Takashi & Toyoda, Haruyoshi
Abstract:

“Conventional methods of compensating for self-distortion in liquid-crystal-on-silicon spatial light modulators (LCOS-SLM) are based on aberration correction, where the wavefront of the incident beam is modulated to compensate for aberrations caused by the imperfect optical flatness of the LCOS-SLM surface. However, the phase distribution of an LCOS-SLM varies with changes in ambient temperature and requires additional correction. We report a novel phase compensation method under temperature-varying conditions based on an orthonormal Legendre series expansion of the phase distribution. We investigated the temperature dependency by controlling the ambient temperature with an incubator and successfully corrected for self-distortion in a temperature range of 20 °C to 50 °C. Our approach has the potential to be adopted in tight-focusing applications which require wavefront modulation with very high accuracy.”

Restricted Access

Publication: Optics Express
Issue/Year: Optics Express, Volume 22; Number 13; Pages 16087; 2014
DOI: 10.1364/oe.22.016087
Link: https://doi.org/10.1364/oe.22.016087

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