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:
Mar. 17, 2015
Filed:
Aug. 19, 2013
Canon Kabushiki Kaisha, Tokyo, JP;
Ikutaro Mitsutake, Utsunomiya, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An illumination apparatus includes a light source, a light guide, and a holding member configured to hold the light source and to hold the light guide via a fixing member. Within a cross section including a plane normal direction of an exit surface of the light source and a plane normal direction of an entrance surface of the light guide, the plane normal direction of the entrance surface of the light guide or a direction within a surface of the light guide contacting the fixing member and the plane normal direction of the exit surface of the light source or a maximum intensity direction in light emission of the light source are inclined relative to each other such that a ray of light from the light source in the maximum intensity direction is refracted at the entrance surface of the light guide in a direction away from the fixing member.