Back to results
US 11,892,658 B2Granted
Cemented lens, optical system including the same, optical apparatus, and method for manufacturing cemented lens
AssigneeCanon Kabushiki Kaisha
InventorsMasanobu Ogane, Kenji Makino, Norihiko Ochi
Life of this patent
Estimating the term…
Abstract
A cemented lens includes a first optical element, a second optical element, a third optical element sandwiched between the first optical element and the second optical element and containing resin, a light shielding layer covering a surface of the third optical element that is in contact with neither the first optical element nor the second optical element, and a porous layer covering at least a part of the light shielding layer.
Claims19
A 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.
4 more elements
An 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.
8 more elements
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.
12 more elements
A method for manufacturing a cemented lens, the method comprising:
- cementing a first optical element and a second optical element together with use of an adhesive to fabricate a lens including the first optical element and the second optical element cemented together with a resin layer;
- forming a light shielding layer on an edge surface of the lens;
- and
- forming 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.
2 more elements
Dependencies are inferred from the claim text.