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Title:
OPTICAL MEMBER
Document Type and Number:
WIPO Patent Application WO/2007/142186
Kind Code:
A1
Abstract:
This invention relates to an optical member, especially an optical member having at least one surface whereupon a reflection preventing uneven structure is formed. Provided is an optical member having an easily manufactured structure which sufficiently suppresses generation and reflection of diffracted light. A reflection preventing uneven structure (11) wherein a plurality of cone-shaped protruding sections (12) are regularly arranged is formed on a first lens surface (10) of a lens (1). The reflection preventing uneven structure (11) suppresses reflection of light having a wavelength equivalent to the pitch of the cone-shaped protruding sections (12) or longer. The reflection preventing uneven structure (11) is so configured that a region wherein the pitch and/or the height of the cone-shaped protruding sections (12) alternately vary exists within the first lens surface (10).

Inventors:
YAMADA KAZUHIRO
TANAKA YASUHIRO
YAMAGATA MICHIHIRO
HAYASHI KATSUHIKO
ISHIMARU KAZUHIKO
YOSHIKAWA MOTONOBU
Application Number:
PCT/JP2007/061283
Publication Date:
December 13, 2007
Filing Date:
June 04, 2007
Export Citation:
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Assignee:
MATSUSHITA ELECTRIC IND CO LTD (JP)
YAMADA KAZUHIRO
TANAKA YASUHIRO
YAMAGATA MICHIHIRO
HAYASHI KATSUHIKO
ISHIMARU KAZUHIKO
YOSHIKAWA MOTONOBU
International Classes:
G02B1/11; G02B1/02; G02B1/118; G02B5/00; G02B5/02; G02B5/18; G11B7/135; G11B7/1374; G11B7/1376
Foreign References:
JP2005283814A2005-10-13
JP2007127855A2007-05-24
JP2006185562A2006-07-13
JP2001013310A2001-01-19
JP2003066203A2003-03-05
Attorney, Agent or Firm:
MAEDA, Hiroshi et al. (5-7 Hommachi 2-chome, Chuo-ku, Osaka-sh, Osaka 53, JP)
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