Accession Number : AD0783852

Title :   The Air Force Weapons Laboratory Laser Window Test Apparatus.

Descriptive Note : Final rept. Jun 72-Jun 73,


Personal Author(s) : Dueweke,P. W. ; Preonas,D. D. ; Peterson,D. G. , Jr

Report Date : JUN 1974

Pagination or Media Count : 144

Abstract : The Laser Window Test Apparatus (LWTA) evaluates windows and other optical components for high-power infrared laser systems. Specimens are probed with narrow beams from low-power lasers (currently CO2 lasers) to determine their optical characteristics at incidence angles between 2 and 76 degrees from the normal. The instrument includes a photometer that uses digitized ratiometric detection for measuring single-pass transmittance and single-pass reflectance; an interferometer for measuring the optical pathlength through specimens; a rastering machine for moving the specimens in relation to the probing beams; and a minicomputer controls measurements, performs on-line calibrations, computes running statistical records of the acquired data, and generates an output tape of all data for use by a CDC-6600 computer program which generates the data in its final form and accuracy. (Modified author abstract)

Descriptors :   *Laser materials, *Infrared optical materials, *Infrared windows, *Test equipment, Gas lasers, Carbon dioxide lasers, Infrared lasers, Optical properties, Interferometers, Photometers, Transmittance, Reflectance, Calibration, Minicomputers, Computer programs, Rasters, Data processing

Subject Categories : Lasers and Masers
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE