The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 05, 2026
Filed:
Nov. 28, 2023
Canon Kabushiki Kaisha, Tokyo, JP;
Yu Miyajima, Tochigi, JP;
Yuma Kobayashi, Tochigi, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
An optical system guides a light beam from an image display element to an exit pupil and includes, in order from an exit pupil side to an image display element side, a first transmissive reflective surface, a second transmissive reflective surface, and an optical element disposed closer to the exit pupil than the first transmissive reflective surface. The optical element includes, in order from the exit pupil side to the image display element side, a first optical element made of a first optical material and a second optical element made of a second optical material different from the first optical material. The first and second optical elements are cemented together, and a diffraction grating is formed on a cemented surface. The diffraction grating includes a grating surface and a grating wall surface, the grating surface having a convex shape facing the image display element side. A predetermined inequality is satisfied.