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OPTICAL DEFLECTOR, IMAGE DISPLAYING APPARATUS, AND OBJECT APPARATUS

  • US 20170269354A1
  • Filed: 06/02/2017
  • Published: 09/21/2017
  • Est. Priority Date: 12/08/2014
  • Status: Active Grant
First Claim
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1. An optical deflector used for optically scanning a target surface, the optical deflector comprising:

  • a mirror device configured to include a mirror capable of oscillating; and

    a casing configured to include a window unit for facing the mirror device, and to accommodate the mirror device,wherein the window unit has a transmissive reflection structure in which part of an incident beam is caused to transmit through the window unit toward the mirror, and at least part of a remainder of the incident beam is reflected by the window unit to a direction separated from an optical deflection range that is deflected by the mirror device, andwherein the transmissive reflection structure includes a diffraction grating provided on one of a front surface and a back surface of the window unit.

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