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:
Jun. 02, 2020
Filed:
Nov. 28, 2018
Canon Kabushiki Kaisha, Tokyo, JP;
Yu Miyajima, Utsunomiya, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
For the purpose of providing a light guiding member with a simple structure which is capable of suppressing risk that unnecessary light could be mixed in a primary optical path, a light guiding member according to the present invention includes an incident surface, a reflection surface which reflects a light flux from the incident surface, and a side surface disposed at a distance of 1.2 R or more from a center of the reflection surface, where R is a distance from the center to an edge portion of the reflection surface, in a direction perpendicular to a first cross-section including an incident light toward the reflection surface on an optical axis and a reflected light from the reflection surface on the optical axis.