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:
Jun. 21, 2005
Filed:
Jun. 13, 2003
Makoto Sato, Tachikawa, JP;
Hideki Nakamura, Ome, JP;
Makoto Sato, Tachikawa, JP;
Hideki Nakamura, Ome, JP;
Casio Computer Co., Ltd., Tokyo, JP;
Abstract
A light source unit is provided which includes a lamp and a reflector for reflecting rays of light emitted by a light emitting element of the lamp and for focusing the reflected rays of light. In order to focus on a predetermined focal point the rays of light emitted by the light emitting element of the lamp and refracted by a cross-sectional shape of the lamp, the reflector has a concave reflective shape formed so as to satisfy a predetermined calculation expression. Alternatively, a reflective surface shape of the reflector may be obtained by shifting portions of an ellipse and rotating a curve of the shifted portions around the optical axis of the light source unit.