GRIN lens and method of manufacturing
AssigneeLightPath Technologies, Inc.
InventorsXiaojie Xu, Michael E. Savard
Life of this patent
Estimating the term…
Abstract
An optical element having an optical axis, and comprising a plurality of definable adjacent zones of optical material, each zone having a definable refractive index different from the refractive index of an adjacent zone and an Abbe number, the zones of optical materials being arranged parallel to each other to define a profile of refractive indices which is symmetric about a plane of symmetry along the optical axis of the element and parallel to the zones. In one embodiment the optical element is a spectrally invariant lens.
Claims9
A substantially spectrally invariant gradient optical element formed of optical material having front and back faces and an optical axis, said optical material having a refractive index varying symmetrically about a central plane containing said optical axis, said refractive index being substantially constant in directions parallel to said central plane, said central plane passing from one of said front and back faces to the other of said faces, said element having an Abbe Number greater than 100.
Dependencies are inferred from the claim text.