Title:
LIGHT-SHIELDING FILM FOR OPTICAL INSTRUMENT AND LAMINATED LIGHT-SHIELDING FILM FOR OPTICAL INSTRUMENT, AND LIGHT-SHIELDING RING FOR OPTICAL INSTRUMENT, DIAPHRAGM MEMBER FOR OPTICAL INSTRUMENT, SHUTTER MEMBER FOR OPTICAL INSTRUMENT, LENS UNIT AND CAMERA MODULE USING THE SAME
Document Type and Number:
Japanese Patent JP2019184848
Kind Code:
A
Abstract:
To provide a light-shielding film and the like, having light-shielding property and low reflectivity which are required for application to optical instruments, and reducing heat generation or fume due to absorption of near infrared light.SOLUTION: A light-shielding film 100 has a multilayer structure including a base film 11, a light-shielding layer 21 disposed on one main surface 11a side of the base film 11, and a light-shielding film 31 disposed on the other main surface 11b side. The light-shielding layers 21, 31 comprise at least a binder resin and a pigment dispersed in the binder, have an optical density of 1.5 or more and a 60-degree glossiness of less than 10%. The light-shielding film has a spectral reflectance of 20% or more in a near infrared region of 700 cmor more and 1500 cmor less, measured in accordance with JIS R 3106. It is preferable that the base film 11, the light-shielding layer 21 and/or the light shielding layer 31 have inclined end faces 12, 22, 32 to expand the film width from the light-shielding layer 21 toward the light-shielding layer 31.SELECTED DRAWING: Figure 2
Inventors:
YAMAMOTO HIROKI
NAGAHAMA TSUYOSHI
TOMIZAWA SHUZO
TOYOSHIMA YASUMARO
NAGAHAMA TSUYOSHI
TOMIZAWA SHUZO
TOYOSHIMA YASUMARO
Application Number:
JP2018076190A
Publication Date:
October 24, 2019
Filing Date:
April 11, 2018
Export Citation:
Assignee:
KIMOTO KK
International Classes:
G02B5/00; G02B7/02; G03B9/00; G03B11/00
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Attorney, Agent or Firm:
Yoshiyuki Inaba
Kazuhiko Naito
Satojiro Okano
Kazuhiko Naito
Satojiro Okano