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:
Feb. 02, 2021
Filed:
Jun. 02, 2020
Canon Kabushiki Kaisha, Tokyo, JP;
Yu Miyajima, Utsunomiya, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
Provided is a discriminating device including a light-receiving unit receiving light beam from a detected surface (DS) and an optical unit (OU) guiding light beam from DS to light-receiving unit, and satisfying following conditional expressions:0.01≤|β1/β0−1|, and1<|β1/β0−1|/|β1/β0−1|,where βm0 represents a magnification of OU with respect to a first direction in a first cross section parallel to DS when DS is at a first position, βm1 represents a magnification of OU with respect to first direction in first cross section when DS is at a second position shifted from first position by +0.2 mm in a direction perpendicular to DS, βs0 represents a magnification of OU with respect to a second direction perpendicular to first direction in first cross section when DS is at first position, and βs1 represents a magnification of OU with respect to second direction in first cross section when DS is at second position.