US 12,174,525 B2
Light shielding blade and image pickup apparatus
Hirotomo Tamiya, Kanagawa (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Aug. 5, 2022, as Appl. No. 17/882,134.
Application 17/882,134 is a continuation of application No. 17/195,411, filed on Mar. 8, 2021, granted, now 11,435,647.
Claims priority of application No. 2020-048569 (JP), filed on Mar. 19, 2020.
Prior Publication US 2022/0373860 A1, Nov. 24, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G03B 9/22 (2021.01); B32B 7/12 (2006.01); B32B 15/01 (2006.01); G03B 9/08 (2021.01); G03B 9/36 (2021.01); H04N 23/55 (2023.01); C23C 14/20 (2006.01)
CPC G03B 9/22 (2013.01) [B32B 7/12 (2013.01); B32B 15/016 (2013.01); B32B 15/017 (2013.01); G03B 9/08 (2013.01); G03B 9/36 (2013.01); H04N 23/55 (2023.01); B32B 2255/06 (2013.01); B32B 2255/26 (2013.01); B32B 2307/546 (2013.01); B32B 2307/72 (2013.01); B32B 2307/732 (2013.01); C23C 14/20 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A light shielding blade comprising:
a laminate in which a resin layer is sandwiched between two metal base materials,
wherein at least one of the two metal base materials have a specific rigidity of 20×106 [Pa·m3/kg] or more and a specific bending rigidity of 1.0 [Pa1/3·m3/kg] or more,
wherein the resin layer is a cured product of a composition containing at least an epoxy resin and a crosslinking curing agent, and
wherein the composition contains a supramolecular inclusion body in an amount of 0.1 part by mass or more and 4.0 parts by mass or less with respect to 100 parts by mass of the epoxy resin.