Optical deflector, image displaying apparatus, and object apparatus
US10459218B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 2, 2017 |
| Grant date | Oct 29, 2019 |
| Priority date | — |
| Expiry date | Jan 4, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/12
- WIPO fieldOptics
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.