Title:
OPTICAL COMPONENT AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2019/021931
Kind Code:
A1
Abstract:
Provided is an optical component whereby the absence of eccentricity can be instantly confirmed visually even when the optical component has a Fresnel lens or other very fine structure. This optical component has an optical part and a peripheral part thereof, the optical component having recognition marks whereby eccentricity can be recognized, the recognition marks being expressed as recesses and projections in positions where a front surface side and a rear surface side of the peripheral part are substantially plane-symmetrical to each other. The two recognition marks are preferably alike in shape, one recognition mark being preferably 10-90% the size of the other recognition mark.
Inventors:
FUJIKAWA TAKESHI (JP)
FUKUI SADAYUKI (JP)
FUKUI SADAYUKI (JP)
Application Number:
PCT/JP2018/027108
Publication Date:
January 31, 2019
Filing Date:
July 19, 2018
Export Citation:
Assignee:
DAICEL CORP (JP)
International Classes:
G02B3/00; B29C33/42; G02B3/08
Domestic Patent References:
| WO2014098075A1 | 2014-06-26 | |||
| WO2015098736A1 | 2015-07-02 | |||
| WO2007018118A1 | 2007-02-15 |
Foreign References:
| JP2002014205A | 2002-01-18 | |||
| JP2009072995A | 2009-04-09 | |||
| JP2003322708A | 2003-11-14 | |||
| US4918826A | 1990-04-24 | |||
| US5464960A | 1995-11-07 | |||
| JP2017144150A | 2017-08-24 |
Other References:
See also references of EP 3660549A4
Attorney, Agent or Firm:
GOTO & CO. (JP)
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