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. 25, 2023
Filed:
Feb. 23, 2021
Ricoh Company, Ltd., Tokyo, JP;
Michiaki Shinotsuka, Kanagawa, JP;
Syuji Kubota, Tokyo, JP;
RICOH COMPANY, LTD., Tokyo, JP;
Abstract
A detection device configured to detect an object includes a first light source configured to emit infrared as first light in a first direction, a second light source configured to emit second light in a second direction different from the first direction, a shield to shield a portion of an optical path from the second light source, to allow a portion of the second light to pass, a light-receiving device configured to receive the first light reflected from the object and the portion of the second light reflected from the object, and circuitry configured to detect presence or absence of the object based on reception of reflected light by the detector. The second light is different from the first light.