Patent ID: 9488810
Filing Date: 2016-11-08
CPC Classification: G02B

Claim Text:
1. An apparatus for producing a Fourier transform of an incident planar electromagnetic wave on a projection plane, the apparatus comprising: a first half of a first sphere, the first half comprised of a first dielectric material and defining a first planar surface and a first spherical surface, the first half oriented so as to receive the incident planar electromagnetic wave on the first planar surface and to direct the incident planar electromagnetic wave onto the first spherical surface; and a second half of a second sphere, the second half comprised of a second dielectric material and defining a second planar surface and a second spherical surface, the second half oriented oppositely to the first half so as to receive the incident planar electromagnetic wave transmitted from the first spherical surface on the second spherical surface and to direct the incident planar electromagnetic wave onto the second planar surface, wherein the first half and the second half are configured to project the Fourier transform of the incident planar electromagnetic wave onto the projection plane, the Fourier transform having a spot-size less than or equal to one-half of the wavelength of the incident planar electromagnetic wave.