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US 2022/0187502 A1Published application
Optical element and optical device including the same
AssigneeCanon Kabushiki Kaisha
InventorKazue Uchida
Life of this patent
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Abstract
An optical element includes a substrate made of a resin material and an antireflection film. The antireflection film consists of a dielectric layer formed on the substrate and a porous layer formed on the dielectric layer. The dielectric layer includes a first layer including silicon oxide and a second layer including tantalum oxide. The porous layer includes silicon oxide or magnesium fluoride.
Claims18
An optical element comprising:
- a substrate made of a resin material;
- and
- an antireflection film,
- wherein the antireflection film consists of a dielectric layer formed on the substrate and a porous layer formed on the dielectric layer,
- the dielectric layer includes a first layer comprising silicon oxide and a second layer comprising tantalum oxide, and
- the porous layer comprises silicon oxide or magnesium fluoride.
3 more elements
Dependencies are inferred from the claim text.