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US 12,650,540 B2Granted
Optical apparatus, image pickup apparatus, and projection apparatus
AssigneeCanon Kabushiki Kaisha
InventorsAkira Yokoyama, Shotaro Watanabe
Life of this patent
Estimating the term…
Abstract
The optical apparatus comprises an optical member and an aluminum alloy member facing the optical member. A black oxide coating is formed on a surface of the aluminum alloy member facing the optical member, and a plurality of holes each having a diameter of 5 μm or more and 100 μm or less are formed in the black oxide coating.
Claims13
An optical apparatus comprising:
- an optical member;
- and
- an aluminum alloy member facing provided on a member that holds the optical member,
- wherein the aluminum alloy member has a surface including a black oxide coating formed thereon, and
- wherein the aluminum alloy member includes a plurality of holes each having a diameter of 5 μm or more and 100 μm or less formed in the black oxide coating.
2 more elements
An image pickup apparatus comprising:
- an optical apparatus;
- and
- an image pickup element configured to capture an image formed by the optical apparatus, the optical apparatus comprising:
- an optical member;
- and
- an aluminum alloy member provided on a member that holds the optical member,
- wherein the aluminum alloy member has a surface including a black oxide coating formed thereon, and
- wherein the aluminum alloy member includes a plurality of holes each having a diameter of 5 μm or more and 100 μm or less formed in the black oxide coating.
5 more elements
A projection apparatus comprising:
- an optical apparatus;
- and
- a light source that emits light to be projected by the optical apparatus, the optical apparatus comprising:
- an optical member;
- and
- an aluminum alloy member provided on a member that holds the optical member,
- wherein the aluminum alloy member has a surface including a black oxide coating formed thereon, and
- wherein the aluminum alloy member includes a plurality of holes each having a diameter of 5 μm or more and 100 μm or less formed in the black oxide coating.
5 more elements
Dependencies are inferred from the claim text.