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US 12,504,562 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.
Claims13
An optical element, comprising:
- a first lens having a first refractive surface, a second refractive surface, and a side surface;
- a resin layer on the first refractive surface;
- a light shielding layer covering at least part of the resin layer and the side surface of the first lens;
- and
- a continuous porous layer covering at least part of the second refractive surface and at least part of the light shielding layer,
- wherein the continuous porous layer has a communication hole structure,
- wherein holes included in the continuous porous layer are spatially in communication with each other, and
- wherein the continuous porous layer is arranged to spatially connect the light shielding layer and the atmosphere.
5 more elements
Dependencies are inferred from the claim text.