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:
Jan. 03, 2006
Filed:
Dec. 09, 2003
Yoshiharu Tenmyo, Kanagawa, JP;
Yoshiharu Tenmyo, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An illumination apparatus is disclosed, whose aperture portion can be made smaller while achieving miniaturization of the apparatus and higher condensing efficiency. The illumination apparatus comprising a light source, and a condensing unit that condenses light emitted from the light source toward the optical axis, wherein the condensing unit includes a negative lens portion that is arranged on a front side of the apparatus and has negative refractive power, a positive lens portion that is arranged near the optical axis and has positive refractive power, and a reflection portion that reflects emitted light that is not directed to the positive lens portion toward the optical axis.