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:
May. 23, 2006
Filed:
Sep. 29, 2004
Akira Takahashi, Iwate, JP;
Masaharu Odashima, Iwate, JP;
Shigeru Umeki, Iwate, JP;
Katsuya Kusaka, Iwate, JP;
Hiroaki Takahashi, Iwate, JP;
Hiroyuki Anbe, Iwate, JP;
Ichiroh Oikawa, Iwate, JP;
Mitsuhiro Kudou, Iwate, JP;
Akira Takahashi, Iwate, JP;
Masaharu Odashima, Iwate, JP;
Shigeru Umeki, Iwate, JP;
Katsuya Kusaka, Iwate, JP;
Hiroaki Takahashi, Iwate, JP;
Hiroyuki Anbe, Iwate, JP;
Ichiroh Oikawa, Iwate, JP;
Mitsuhiro Kudou, Iwate, JP;
Ricoh Optical Industries Co., Ltd., Hanamaki, JP;
Abstract
An optical system includes a plurality of separate light sources with a number M of the light sources arranged in a first direction and a number N of the light sources arranged in a second direction. Each of the light sources has an asymmetric light emission area. The light sources are arranged so that a light beam passing a collimator optical element has a beam width in the first direction greater than a beam width in the second direction. An anamorphic optical element is arranged to have a beam-size reduction rate in the first direction greater than a beam-size reduction rate in the second direction and converts the plurality of light beams from the light sources into a light beam having a symmetric beam cross-section. A light-condensing optical element condenses the light beam having the symmetric beam cross-section into a light receiving element, and the anamorphic optical element includes an array of a number of prisms integrally arranged.