Accession Number : ADB056628

Title :   Erosion Resistant FLIR Window Materials.

Descriptive Note : Final technical rept. 1 Aug 78-31 Jul 80,

Corporate Author : RAYTHEON CO WALTHAM MA RESEARCH DIV

Personal Author(s) : Tustison,Randal W.

Report Date : MAR 1981

Pagination or Media Count : 130

Abstract : A composite FLIR window has been developed during this program which offers a substantial increase in erosion resistance over that of conventional monolithic windows (germanium or zinc sulfide). This composite consists of a thin (0.060 in.) high durability cladding layer bonded to a thicker (0.400 in.) zinc selenide sublayer. This window also features a segmented aperture design, facilitating window fabrication. Four candidate cladding materials were produced and evaluated with respect to their mechanical, optical and rain erosion resistance characteristics before identifying silicon as the only viable material. Bonding techniques and stresses generated by different thermal expansion remain problem areas that require more development. (Author)

Descriptors :   *INFRARED WINDOWS, *FORWARD LOOKING INFRARED SYSTEMS, *EROSION RESISTANCE, COMPOSITE MATERIALS, LAYERS, GALLIUM ARSENIDES, GALLIUM PHOSPHIDES, ZINC SELENIDES, CARBON, POLYCRYSTALLINE, SILICON, GERMANIUM, BONDING, THERMAL EXPANSION, GLASS, FABRICATION, TEST METHODS, RAIN EROSION

Subject Categories : Laminates and Composite Materials
      Infrared Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE