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

Title:

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 (JP)
NAGAHAMA TSUYOSHI (JP)
TOMIZAWA SHUZO (JP)
TOSHIMA YASUMARO (JP)

Application Number:

PCT/JP2019/013288

Publication Date:

October 17, 2019

Filing Date:

March 27, 2019

Export Citation:

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Assignee:

KIMOTO KK (JP)

International Classes:

G02B5/00; G02B7/02; G03B9/00; G03B11/00

Domestic Patent References:

WO2012132727A1	2012-10-04
WO2006016555A1	2006-02-16

Foreign References:

JP2012133071A	2012-07-12
JP2011145346A	2011-07-28
JP2009031769A	2009-02-12
JP2009069822A	2009-04-02
JP2010197880A	2010-09-09
JP2010069760A	2010-04-02
JP2002002099A	2002-01-08
JP2001081431A	2001-03-27
JPH11301117A	1999-11-02
JP2017015815A	2017-01-19
US20140078606A1	2014-03-20
JPH09274218A	1997-10-21
JP2012133071A	2012-07-12

Other References: