Title:
SHADING FILM, OPTICAL ELEMENT, AND SHADING PAINT
Document Type and Number:
Japanese Patent JP2023104069
Kind Code:
A
Abstract:
To provide a shading film which does not allow occurrence of crack in lens even if the lens is composed of a base material likely to be subjected to stress and even when subjected to severe thermal shock, nor allow occurrence of bleed-out under a hot and humid environment, and which has high inner surface antireflection performance.SOLUTION: The shading film includes an aggregate of inorganic particles in d-ray refractive index of 2.0 or greater, a coloring agent, a resin and a plasticizer. An average particle diameter of the aggregate is 250 nm or less, and the plasticizer has a pour point of -50°C or below and a boiling point of 200°C to 450°C inclusive.SELECTED DRAWING: None
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Inventors:
KUBOTA REIKO
TAKACHI MIWA
TAKACHI MIWA
Application Number:
JP2022004838A
Publication Date:
July 28, 2023
Filing Date:
January 17, 2022
Export Citation:
Assignee:
CANON KK
International Classes:
G02B5/00; C09D5/32; C09D7/61; C09D7/63; C09D201/00; G02B3/00; G02B7/02; G03B11/04
Attorney, Agent or Firm:
Yoshihiro Yamaguchi
Keisuke Watanabe
Keisuke Watanabe