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:
Nov. 24, 2020
Filed:
Sep. 25, 2019
Canon Kabushiki Kaisha, Tokyo, JP;
Yuuki Maeda, Utsunomiya, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
An optical apparatus includes a light source unit, at least one first light modulation element, an illumination optical system configured to illuminate the first light modulation element using light from the light source unit, and a relay optical system configured to make conjugate with each other a predetermined surface on an optical path between the light source unit and the first light modulation element, and a surface of the first light modulation element. The relay optical system includes, in order from the predetermined surface to the first light modulation element, a first reflection surface having a positive power, a second reflection surface having a negative power, and a third reflection surface having a positive power. The relay optical system satisfies a predetermined condition.