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:
Dec. 27, 2005
Filed:
Dec. 31, 2003
Ryoichi Aoyama, Tokyo, JP;
Toshio Onodera, Tokyo, JP;
Yasuhiro Yamamoto, Miyagi, JP;
Daigo Hoshino, Kanagawa, JP;
Ryoichi Aoyama, Tokyo, JP;
Toshio Onodera, Tokyo, JP;
Yasuhiro Yamamoto, Miyagi, JP;
Daigo Hoshino, Kanagawa, JP;
Oki Electric Industry Co., Ltd., Tokyo, JP;
Abstract
To an original plate holderto which an original pattern plateis set in ordinary exposure, a transmittable platehaving a concave-shaped concave portionformed at a middle of a quartz glass plate is set in self-cleaning and irradiated with ultraviolet light emitted from a light source. The ultraviolet light is diffused through the concave lens of the transmittable plateand an entire surface of a projection lensis irradiated with it. Accordingly, molecular bonds of a contaminant adhering to the surface of the projection lensare cut off with strong energy of the ultraviolet light, so that the contaminant is decomposed, vaporized, and then removed.