OPTICAL DEFLECTOR, IMAGE DISPLAYING APPARATUS, AND OBJECT APPARATUS
First Claim
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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Accused Products
Abstract
An optical deflector is used for optically scanning a target surface. The optical deflector includes: 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. 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, and 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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Citations
14 Claims
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1. An optical deflector used for optically scanning a target surface, the optical deflector comprising:
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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, and wherein the transmissive reflection structure includes a diffraction grating provided on one of a front surface and a back surface of the window unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification