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Title:
LIGHT-SHIELDING FILM FOR OPTICAL EQUIPMENT AND LIGHT-SHIELDING LAMINATED FILM FOR OPTICAL EQUIPMENT, LIGHT-SHIELDING RING FOR OPTICAL EQUIPMENT USING SAME, DIAPHRAGM MEMBER FOR OPTICAL EQUIPMENT, SHUTTER MEMBER FOR OPTICAL EQUIPMENT, LENS UNIT, AND CAMERA MODULE
Document Type and Number:
WIPO Patent Application WO/2019/198511
Kind Code:
A1
Abstract:
The present invention provides a light-shielding film and the like that has a light shielding ability and low reflectivity required for use in optical equipment and wherein heat generation or smoke generation due to the absorption of near-infrared light is reduced. A light-shielding film 100 has a laminate structure that includes a base film 11, a light-shielding layer 21 provided on one principal surface 11a of the base film 11, and a light-shielding layer 31 provided on the other principal surface 11b. The light-shielding layers 21, 31 contain at least a binder resin and pigments dispersed in the binder, and have an optical concentration of 1.5 or greater and a 60-degree gloss less than 10%. The light-shielding film has a spectral reflectance of 20% or greater in a near-infrared area between 700 cm-1 and 1500 cm-1,inclusive measured in accordance with JIS R 3106. The base film 11, the light-shielding layer 21, and/or the light-shielding layer 31 preferably includes inclined end surfaces 12, 22, 32 that extends the film width from the light-shielding layer 21 to the light-shielding layer 31.

Inventors:
YAMAMOTO, Hiroki (LTD. R&D Central laboratory 6-35, Suzuya 4-Chome, Chuo-ku, Saitama-sh, Saitama 13, 〒3380013, JP)
NAGAHAMA, Tsuyoshi (LTD. R&D Central laboratory 6-35, Suzuya 4-Chome, Chuo-ku, Saitama-sh, Saitama 13, 〒3380013, JP)
TOMIZAWA, Shuzo (LTD. R&D Central laboratory 6-35, Suzuya 4-Chome, Chuo-ku, Saitama-sh, Saitama 13, 〒3380013, JP)
TOSHIMA, Yasumaro (LTD. R&D Central laboratory 6-35, Suzuya 4-Chome, Chuo-ku, Saitama-sh, Saitama 13, 〒3380013, JP)
Application Number:
JP2019/013288
Publication Date:
October 17, 2019
Filing Date:
March 27, 2019
Export Citation:
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Assignee:
KIMOTO CO., LTD. (6-35, Suzuya 4-Chome Chuo-ku, Saitama-sh, Saitama 13, 〒3380013, JP)
International Classes:
G02B5/00; G02B7/02; G03B9/00; G03B11/00
Domestic Patent References:
WO2012132727A12012-10-04
Foreign References:
JP2012133071A2012-07-12
JP2011145346A2011-07-28
JP2009031769A2009-02-12
JP2009069822A2009-04-02
JP2010197880A2010-09-09
JP2010069760A2010-04-02
JP2002002099A2002-01-08
JP2001081431A2001-03-27
JPH11301117A1999-11-02
JP2017015815A2017-01-19
US20140078606A12014-03-20
Attorney, Agent or Firm:
INABA, Yoshiyuki et al. (TMI ASSOCIATES, 23rd Floor Roppongi Hills Mori Tower, 6-10-1, Roppongi, Minato-k, Tokyo 23, 〒1066123, JP)
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