Angular and spatial light modulation by single digital micromirror device for multi-image output and nearly-doubled étendue

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Abstract
The "Angular Spatial Light Modulator" (ASLM) achieves simultaneous angular and spatial light modulation at a plane by combining Digital Micromirror Device (DMD) based programmable blazed grating beam steering and binary pattern sequencing. The ASLM system multiplies the number of effective output pixels of the DMD for increased spatial and/or angular degrees of freedom, and nearly-doubles the étendue output of the DMD. We implement multiple illumination and projection schemes to demonstrate ASLM-based extended FOV display, light-field projection, and multi-view display. We also implement time-multiplexed pupil segmented illumination to extend the pattern steering to two dimensions.
Funding Information
  • Achievement Rewards for College Scientists Foundation (ARCS)
  • Air Force Research Laboratory (AFRL)
  • University of Arizona (UA)

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