US 12,292,616 B2
Optical element, optical apparatus, and image pickup apparatus
Tadanori Okada, Tochigi (JP)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Mar. 11, 2021, as Appl. No. 17/198,385.
Claims priority of application No. 2020-047297 (JP), filed on Mar. 18, 2020.
Prior Publication US 2021/0294065 A1, Sep. 23, 2021
Int. Cl. G02B 7/02 (2021.01); H04N 23/55 (2023.01)
CPC G02B 7/026 (2013.01) [G02B 7/021 (2013.01); H04N 23/55 (2023.01)] 10 Claims
OG exemplary drawing
 
1. An optical apparatus comprising:
a plurality of optical elements; and
a cemented lens formed by cementing with an adhesive, and the cemented lens has a cemented portion located on an outer periphery of the cemented lens,
wherein the cemented lens includes:
a cemented surface in which a concave lens and a convex lens are cemented together;
a groove formed in an outer periphery of the concave lens; and
an elastic member, which is provided in the groove, and is configured to shield light, the elastic member having a ring shape,
wherein a distance from an innermost peripheral portion of the groove formed in the cemented lens to an optical axis is shorter than a distance from the outer periphery of the cemented portion of the cemented lens to the optical axis, and
wherein the groove is located in an object side from the cemented portion or an image plane side from the cemented portion in a direction of the optical axis.