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US 2016/0238753 A1Published application
Flat retroreflectors
AssigneeCalifornia Institute of Technology
InventorsAmir ARBABI, Andrei FARAON
Life of this patent
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Abstract
A retroreflector device is described, which includes a lens component operable for focusing radiation, which is incident thereto at an angle of incidence. The retroreflector also includes a mirror component operable for reflecting the radiation focused by the lens component back along the angle of incidence. The lens component and/or the mirror component includes a quasi-periodic array of elements, each of which comprises a dimension smaller than a wavelength of the radiation.
Claims20
A method of fabricating an optical retroreflector device, the method comprising:
- disposing a lens component on a substrate, wherein the lens component is operable for focusing radiation, which is incident thereto at an angle of incidence;
- and
- disposing a mirror component on the substrate, herein the mirror component is operable for reflecting the radiation focused by the lens component back along the angle of incidence;
- wherein one or more of the disposing the lens component or the disposing the mirror component comprises disposing a quasi-periodic array of elements, each of which comprises a dimension smaller than a wavelength of the radiation.
1 more element
An optical apparatus, comprising:
- a retroreflector device disposed on a substrate, the retroreflector device comprising:
- a lens component operable for focusing radiation, which is incident thereto at an angle of incidence;
- and
- a mirror component operable for reflecting the radiation focused by the lens component back along the angle of incidence;
- wherein one or more of the lens component or the mirror component comprises a quasi-periodic array of elements, each of which comprises a dimension smaller than a wavelength of the radiation within an operationally efficient wavelength range;
- and
- a spacer component, which is transparent over the operationally efficient wavelength range and is disposed over the substrate and beneath the mirror component in relation to the lens component.
4 more elements
Dependencies are inferred from the claim text.