Back to results
US 10,473,948 B2Granted
Optical hybrid lens and method for producing an optical hybrid lens
AssigneeAms AG
InventorLukas Elsinger
Life of this patent
Estimating the term…
Abstract
An optical hybrid lens comprises a substrate having a first surface and a second surface opposite the first surface. A sub-wavelength grating lens is disposed on the first surface and comprises a plurality of posts. The plurality of posts is arranged on the first surface and the posts extend from the first surface. A refractive lens is arranged on the sub-wavelength grating lens at least partly enclosing the plurality of posts. Alternatively, the refractive lens is arranged on the second surface.
Claims20
An optical hybrid lens, comprising:
- a substrate having a first surface and a second surface opposite the first surface,
- a sub-wavelength grating lens disposed on the first surface and comprising a plurality of posts,
- the plurality of posts being arranged on the first surface and extending from the first surface, and
- a refractive lens arranged on the sub-wavelength grating lens at least partly enclosing the plurality of posts, or arranged on the second surface,
- wherein:
- the refractive lens has a first focal length that is a function of wavelength,
- sub-wavelength grating lens has a second focal length that is a function of wavelength, wherein a wavelength dependency of the second focal length is an inverse of a wavelength dependency of the first focal length, and
- wherein the first and second focal length are defined with respect to a range of wavelengths to be transmitted by the optical hybrid lens.
5 more elements
A method for producing an optical hybrid lens at wafer level, comprising the steps of:
- providing a substrate having a first surface and a second surface opposite the first surface,
- disposing a sub-wavelength grating lens comprising a plurality of posts on the first surface,
- arranging the plurality of posts on the first surface so that the posts extend from the first surface,
- arranging a refractive lens on the sub-wavelength grating lens so that the refractive lens at least partly encloses the plurality of posts, or arrange the refractive lens on the second surface,
- configuring the refractive lens to have a first focal length that is a function of wavelength, and
- configuring the sub-wavelength grating lens to have a second focal length that is a function of wavelength,
- wherein:
- a wavelength dependency of the second focal length is adjusted to be an inverse of a wavelength dependency of the first focal length, and
- the first and second focal length are defined with respect to a range of wavelengths to be transmitted by the optical hybrid lens.
6 more elements
Dependencies are inferred from the claim text.