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:
Nov. 24, 2009
Filed:
Jul. 06, 2007
Masahiko Igaki, Yokohama, JP;
Akio Atsuta, Yokosuka, JP;
Masahiko Igaki, Yokohama, JP;
Akio Atsuta, Yokosuka, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A reflective sensor is disclosed which prevents divergent light from a light source from being totally reflected by an interface between the package and the outside thereof and entering a light-receiving element without using a light-shield means and which allows an improved S/N ratio and reduced variations in performance. The reflective sensor includes a light-emitting element and a light-receiving element which are provided on a surface, and a light-transmissive member which covers the light-emitting element and the light-receiving element. The light-receiving element includes a light-receiving region which is spaced from the light-emitting element along the surface, and which light-receiving region is closer to the light-emitting element than an area on the surface that would be illuminated by unimpeded light rays which are totally reflected by an interface between the light-transmissive member and the outside thereof and are directed toward the light-receiving element.