Accession Number : ADD007560

Title :   Near Infrared Polarizers.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Ferrante,Ronald A

Report Date : 01 Jul 1980

Pagination or Media Count : 13

Abstract : Construction of infrared polarizers with wire grids of better than 4300 l/mm is accomplished by a four step process. The first step is to coat a layer of conductive material on a substrate. The substrate should have high transmission for the spectral region desired and the conductive coating should be highly conductive at that same spectral region. Next, a layer of photoresist is deposited over the conductive coating. The photoresist is then exposed in the third step to an interference pattern of two beams from a laser source which records a plane grating in the photoresist. The photoresist is then developed to produce a surface relief grating. The last step requires milling the surface relief grating with commercial ion milling techniques to reproduce the relief surface on the transparent conductive material. (Author)

Descriptors :   *Patent applications, *Near infrared radiation, *Lasers, *Polarizers, Substrates, Conductivity, Coatings, Materials, Wire, Grids, Patterns, Photoresistors, Interference, Gratings(Spectra), Polarization

Subject Categories : Lasers and Masers
      Infrared Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE