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. 06, 2007
Filed:
Dec. 19, 2002
Motonobu Yoshikawa, Osaka, JP;
Yoshiharu Yamamoto, Toyonaka, JP;
Daizaburo Matsuki, Neyagawa, JP;
Hajime Yamamoto, Ikoma, JP;
Masanori Yoshikawa, Neyagawa, JP;
Akinobu Okuda, Toyonaka, JP;
Motonobu Yoshikawa, Osaka, JP;
Yoshiharu Yamamoto, Toyonaka, JP;
Daizaburo Matsuki, Neyagawa, JP;
Hajime Yamamoto, Ikoma, JP;
Masanori Yoshikawa, Neyagawa, JP;
Akinobu Okuda, Toyonaka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
An optical scan apparatus includes an optical deflection unit (), an image formation optical system (), and curved surface mirrors (to). Light fluxes from the image formation optical system () come onto the deflection surface () of die optical deflection unit () in an oblique direction. Light fluxes from the optical deflection unit () come onto the curved surface mirrors (to) in an oblique direction. When a boundary is a plane () including a normal at the center of the deflection surface () and parallel to the main scan direction, the curved surface mirrors (to) are arranged in the same space divided by the boundary and the scan speeds of fluxes scanning the surfaces to be scanned (to) are almost identical. Thus, it is possible to obtain identical drive frequencies of the light sources (to), thereby simplifying the circuit.