US 12,403,666 B2
Light transmitting member and method of producing the same
Eiko Asami, Kanagawa (JP); Yoji Teramoto, Kanagawa (JP); Shuhei Yamamoto, Tokyo (JP); and Shun Ouchi, Kanagawa (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Nov. 21, 2022, as Appl. No. 18/057,310.
Claims priority of application No. 2021-197363 (JP), filed on Dec. 3, 2021; and application No. 2022-171695 (JP), filed on Oct. 26, 2022.
Prior Publication US 2023/0173772 A1, Jun. 8, 2023
Int. Cl. G02B 1/12 (2006.01); B29D 11/00 (2006.01); G02B 1/18 (2015.01)
CPC B29D 11/00884 (2013.01) [G02B 1/12 (2013.01); G02B 1/18 (2015.01)] 8 Claims
OG exemplary drawing
 
1. A light transmitting member comprising:
a light transmitting base material; and
a functional film arranged on the base material,
wherein the functional film includes a porous layer containing a plurality of silicon oxide particles, and a hydrophilic polymer-containing layer containing a hydrophilic polymer having a zwitterionic hydrophilic group provided on a surface of the porous layer opposite to the base material, and
wherein a ratio between an element derived from the hydrophilic polymer-containing layer and a silicon element at a depth of up to 10 nm from an uppermost surface of the functional film is 0.15 to 0.40.