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US 12,313,916 B2Granted
Optical apparatus with structure for liquid invariant performance
AssigneeBrien Holden Vision Institute Limited
InventorsZeev Zalevsky, Ofer Limon
Life of this patent
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AssigneeBrien Holden Vision Institute Limited
InventorsZeev Zalevsky, Ofer Limon
Estimating the term…
A phase-adjusting element configured to provide substantially liquid-invariant extended depth of field for an associated optical lens. One example of a lens incorporating the phase-adjusting element includes the lens having surface with a modulated relief defining a plurality of regions including a first region and a second region, the first region having a depth relative to the second region, and a plurality of nanostructures formed in the first region. The depth of the first region and a spacing between adjacent nanostructures of the plurality of nanostructures is selected to provide a selected average index of refraction of the first region, and the spacing between adjacent nanostructures of the plurality of nanostructures is sufficiently small that the first region does not substantially diffract visible light.
A lens comprising a lens surface providing a refractive power, the lens surface comprising a plurality of concentric annular regions substantially entirely filled by an array of a plurality of optical elements formed on the surface thereof, with each adjacent pair of the plurality of concentric annular regions separated by a region devoid of optical elements, wherein each of the optical elements increases a thickness of the lens at the optical element, and wherein adjacent optical elements in each of the arrays are uniformly distributed and located less than 400 nm apart.
A spectacle lens comprising:
Dependencies are inferred from the claim text.