Invention Grant
- Patent Title: Virtual image display apparatus
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Application No.: US16743082Application Date: 2020-01-15
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Publication No.: US11215833B2Publication Date: 2022-01-04
- Inventor: Masayuki Takagi , Toshiaki Miyao , Takashi Takeda , Tokito Yamaguchi
- Applicant: SEIKO EPSON CORPORATION
- Applicant Address: JP Tokyo
- Assignee: SEIKO EPSON CORPORATION
- Current Assignee: SEIKO EPSON CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Oliff PLC
- Priority: JPJP2019-004137 20190115
- Main IPC: H04N9/31
- IPC: H04N9/31 ; G02B27/01

Abstract:
Provided are an imaging element configured to display an image, a projection optical system configured to project an image from the imaging element, and a two-stage structural diaphragm including a first diaphragm forming a first aperture portion in the projection optical system, and a second diaphragm forming a second aperture portion in the projection optical system, in which inclinations of a principal ray, relative to an image plane of an imaging element, of imaging light emitted from a peripheral portion of the image plane differ between in a first direction and in a second direction perpendicular to the first direction among in-plane directions of the image plane, in which the first diaphragm and the second diaphragm in the two-stage structural diaphragm are provided at different positions corresponding to differences between the inclinations of the principal ray in the first direction and in the second direction.
Public/Granted literature
- US20200225484A1 VIRTUAL IMAGE DISPLAY APPARATUS Public/Granted day:2020-07-16
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