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:
Apr. 21, 2020
Filed:
Jun. 26, 2018
Seiko Epson Corporation, Tokyo, JP;
Yoshihiko Momose, Shiojiri, JP;
Hidekazu Kobayashi, Hara-mura, JP;
Koya Shiratori, Matsumoto, JP;
Takashi Toya, Chino, JP;
Makoto Katase, Azumino, JP;
SEIKO EPSON CORPORATION, Tokyo, JP;
Abstract
A detection device includes a light source which emits light, a lens, a light transmissive protecting plate, a length between the light source and the light transmissive protecting plate being larger than a length between the lens and the light transmissive protecting plate, and a light receiving element which receives the light. An angle formed by an optical axis of the lens and the light transmissive protecting plate is smaller than an angle formed by an optical axis of the light source and the transmissive protecting plate.