Patent ID: 11892658
Assignee: CANON KABUSHIKI KAISHA
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 13:
14. An optical apparatus comprising:
an optical system; and
an image sensor configured to receive light incident via the optical system,
wherein the optical system comprising:
a casing cylinder; and
a cemented lens being disposed inside the casing cylinder,
wherein the cemented lens comprising:
a first optical element;
a second optical element;
a third optical element sandwiched between the first optical element and the second optical element, the third optical element containing resin;
a light shielding layer covering side surfaces of the first optical element, the second optical element, and the third optical element, and being disposed in contact with the third optical element; and
a porous layer covering at least a part of the light shielding layer,
wherein a thickness of the porous layer on the light shielding layer is 0.4 μm or more and 10 μm or less and the porous layer is configured to allow moisture contained in the third optical element and the light shielding layer to be emitted into atmosphere.