Obnoxious background light helps advance spatial light modulator calibration

Spatial light modulator (SLM) is widely used in beam manipulation, interferometric sensing, beam splitter, beam shaping, and laser processing. With the development of optical technique, optical sensing and imaging are getting closer to the diffraction-limited resolution, which must meet the requirement of high-precision wavefront measurement at first. Electrically addressed SLM maps the voltage to the phase modulation of the liquid crystal, which can be provided by a computer-generated two-dimen...