Optical elements having regions of different indices of refracti

Optical: systems and elements – Lens – With graded refractive index

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359565, 359652, 385 33, 4283105, 4283126, 4283155, G02B 300, G02B 2744

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055859682

ABSTRACT:
An optical device having a variable index of refraction across its surface includes a light transmissive material with a plurality of regions in the light transmissive material. Each region has an index of refraction which is different from the remainder of the material. The regions may be arranged in the surface of the material such that the density of the regions on the surface varies across the surface. Each region may be a bore, including a hole that extends through the light transmissive material. Variations in the density of the regions or bores as well as the depth and shape of the bores may be utilized to create variations of the refractive index within the light transmissive material.

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