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, 2010
Filed:
Mar. 07, 2008
Applicants:
Noboru Sawayama, Tokyo, JP;
Kayoko Ikegami, Saitama, JP;
Katsuo Hatase, Saga, JP;
Inventors:
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G01N 21/86 (2006.01); G03G 15/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
An optical sensor includes at least one light emitting unit that emits a light, a first light receiving unit that receives specular reflection light from an illumination object when the light is incident on the illumination object with an incidence angle and specularly reflected with a reflection angle, and a second light receiving unit that receives diffuse reflection light from the illumination object when the incident light is diffusely reflected at the illumination object. The sum of the incident angle and the reflection angle is 25 degrees or less.