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US 9,851,474 B2Granted
Optical component and method of producing the same
AssigneeScivax Corporation
InventorsAkifumi Nawata, Satoru Tanaka
Life of this patent
Estimating the term…
Abstract
An optical component capable of sufficiently reducing reflection of light by controlling a change in refractive index, even if incident angle of light varies. An optical component includes a base, a moth-eye structure with predetermined concavities and convexities, and at least one buffer layer provided between the base and the moth-eye structure. A change in refractive index between the base and a medium is adjusted by the buffer layer and the moth-eye structure.
Claims6
An optical component comprising:
- a base;
- a moth-eye structure comprising predetermined concavities and convexities;
- and
- at least one buffer layer provided between the base and the moth-eye structure, the buffer layer being formed of a material that has a refractive index lower than a refractive index of the base, but higher than a refractive index of the moth-eye structure,
- wherein when a position of an interface between the base and the buffer layer is 0, a shortest distance from the interface toward the moth-eye structure is t, a refractive index of the base is ns, a refractive index of the buffer layer or an average refractive index of the moth-eye structure at a location with the distance t from the interface is nt, a shortest distance from the interface to a vertex of the convexity of the moth-eye structure is h, and a refractive index of a medium in contact with a surface of the moth-eye structure is nM, the refractive index of the buffer layer and the average refractive index of the moth-eye structure are adjusted in such a way that the refractive index nt satisfies a following formula (2):
- -
- 0.15
- ×
- (
- n
- S
- -
- n
- M
- )
- -
- n
- M
- +
- (
- n
- S
- -
- n
- M
- )
-
- (
- t
- -
- h
- )
- 2
- h
- 2
- ≤
- n
- t
- ≤
- 0.15
- ×
- (
- n
- S
- -
- n
- M
- )
- +
- n
- M
- +
- (
- n
- S
- -
- n
- M
- )
-
- (
- t
- -
- h
- )
- 2
- h
- 2
- .
- Formula
-
-
- (
- 2
- )
72 more elements
A method for producing an optical component, the method comprising:
- providing a base, a moth-eye structure with predetermined concavities and convexities, and at least one buffer layer provided between the base and the moth-eye structure;
- and
- applying as a material of the at least one buffer layer, a material that has a refractive index lower than a refractive index of the base, but higher than a refractive index of the moth-eye structure,
- wherein when a position of an interface between the base and the buffer layer is 0, a shortest distance from the interface toward the moth-eye structure is t, a refractive index of the base is ns, a refractive index of the buffer layer or an average refractive index of the moth-eye structure at a location with the distance t from the interface is nt, a shortest distance from the interface to a vertex of the convexity of the moth-eye structure is h, and a refractive index of a medium in contact with a surface of the moth-eye structure is nM, the refractive index of the buffer layer and the average refractive index of the moth-eye structure are adjusted in such a way that the refractive index nt satisfies a following formula (2):
- -
- 0.15
- ×
- (
- n
- S
- -
- n
- M
- )
- -
- n
- M
- +
- (
- n
- S
- -
- n
- M
- )
-
- (
- t
- -
- h
- )
- 2
- h
- 2
- ≤
- n
- t
- ≤
- 0.15
- ×
- (
- n
- S
- -
- n
- M
- )
- +
- n
- M
- +
- (
- n
- S
- -
- n
- M
- )
-
- (
- t
- -
- h
- )
- 2
- h
- 2
- .
- Formula
-
-
- (
- 2
- )
71 more elements
Dependencies are inferred from the claim text.