Accession Number : ADD012374

Title :   Method of Fabricating High Efficiency Binary Planar Optical Elements.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Veldkamp,Wilfrid

Report Date : 16 Apr 1986

Pagination or Media Count : 43

Abstract : The high diffraction efficiency regime of binary gratings occurs at periodicities on the order of a wavelength in order to produce grating which diffract radiation with efficiencies of greater than 90%, a fabrication procedure is disclosed which uses holographic and very large scale integration techniques which allow fine control over the periodicity and depth parameters to produce binary planar optical elements having a ratio of lambda/T greater than one (where lambda equals the wavelength of an illuminating wavefront, and T equals the grating periodicit). Additionally, the disclosed process produces high optical quality diffractive elements with phase precision of as high as lambda/100. These diffractive elements include laser beam multiplexers, beam profile shapers, and binary lenses which are lossless optical transfer functions. (Patent applications)

Descriptors :   PATENT APPLICATIONS, *GRATINGS(SPECTRA), *DIFFRACTION, EFFICIENCY, FABRICATION, LASER BEAMS, LENSES, LOSSES, MULTIPLEXING, OPTICAL PROPERTIES, RATIOS, TRANSFER FUNCTIONS

Subject Categories : Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE