Accession Number : ADA246352


Title :   Early Risk Reduction Phase 1 FLIR/Laser Designator Window. Revision


Descriptive Note : Final rept.,


Corporate Author : MCDONNELL AIRCRAFT CO ST LOUIS MO


Personal Author(s) : Lord, Robert J ; Rosenfeld, Alfred


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a246352.pdf


Report Date : 31 Dec 1991


Pagination or Media Count : 174


Abstract : This program evaluated and tested materials and coatings for use as a common aperture for a laser target designator (LTD) and a Forward Looking Infrared (FLIR). Desired characteristics include: transmission at 1.06 microns for laser and 8 to 11.5 microns for FLIR, radar frequency attenuation for low observability, and durability in tactical aircraft environments. The designs were a zinc sulfide/zinc selenide design and zinc selenide and gallium arsenide designs. All three designs had some degree of success in meeting optical transmission and RF attenuation goals, but all were damaged by sand and rain erosion. A large performance variability of the gallium arsenide used in this program indicated immaturity in the substrate manufacturing expertise. Our evaluation showed that substate cost is high and the industrial base for the production of large window panels is small. Production cost ranges from $190 per cubic inch for zinc selenide to $500 per cubic inch for gallium arsenide. Multi- paned windows for large field of regard operation could cost as much as $500, 000.


Descriptors :   *FREQUENCY , ENVIRONMENTS , MANUFACTURING , PRODUCTION , FORWARD LOOKING INFRARED SYSTEMS , GALLIUM ARSENIDES , PANELS , LASER TARGET DESIGNATORS , SUBSTRATES , LASERS , VARIATIONS , COSTS , COATINGS , RADIATION ATTENUATION , LIGHT TRANSMISSION , WINDOWS , ATTENUATION , RADAR SIGNALS , RADIOFREQUENCY , TACTICAL AIRCRAFT , RAIN EROSION , ZINC SELENIDES , INDUSTRIES


Subject Categories : Aircraft
      Coatings, Colorants and Finishes
      Optics


Distribution Statement : APPROVED FOR PUBLIC RELEASE