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:
Jul. 03, 2007
Filed:
Oct. 27, 2004
Motonobu Yoshikawa, Osaka, JP;
Yoshiharu Yamamoto, Toyonaka, JP;
Yasuhiro Tanaka, Nishinomiya, JP;
Michihiro Yamagata, Osaka, JP;
Hiroshi Yamaguchi, Hirakata, JP;
Motonobu Yoshikawa, Osaka, JP;
Yoshiharu Yamamoto, Toyonaka, JP;
Yasuhiro Tanaka, Nishinomiya, JP;
Michihiro Yamagata, Osaka, JP;
Hiroshi Yamaguchi, Hirakata, JP;
Matsushita Electric Industrial Co., Ltd, Osaka, JP;
Abstract
A light quantity distribution control element includes a substrate of 20 mm×20 mm×3 mm made of a material that transmits light, such as optical glass or acryl, and a antireflective structure provided on a surface of the substrate. As the antireflective structure, a conical antireflective structure of a pitch of 0.15 μm (periodic structure having conical convexities) is formed. This corresponds to a antireflective structure having a pitch of a wavelength or less in the ultraviolet band (150 nm to 400 nm) at the time when ultraviolet light is used as incident light.