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. 04, 2003
Filed:
Sep. 27, 2001
Shinji Okamori, Tokyo, JP;
Shinsuke Shikama, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
An optical device including an illuminant for emitting light; light condensing element composed of a reflecting mirror whose shape of reflecting plane is of rotational secondary curved surface and a condenser lens for converging approximately parallel fluxes; a mixing rod whose section is quadrangle, first lens element composed of at least one lens; and a reflecting optical element which is disposed near the position where a plurality of tertiary illuminants are formed and which reflects light in a desired direction. This optical device allows a distribution of illuminance whose intensity is highly uniform to be obtained even when a light flux is inputted from a direction inclined from the normal direction of the plane-to-be-illuminated by illuminating the optical device disposed out of an optical axis of the illuminator.