Accession Number : ADA007778

Title :   Determination of the Stress-Optic Coefficients of ZnSe,

Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF ENGINEERING SCIENCE OPERATIONS

Personal Author(s) : Goldstein,Lester F. ; Thompson,James S. ; Schroeder,John B. ; Slattery,James E.

Report Date : 15 SEP 1974

Pagination or Media Count : 19

Abstract : In high-power laser systems, windows are required in order to provide environmental isolation for the laser and tracking systems without degradation of the optical quality of the transmitted laser wavefront. Two classes of specifications must be simultaneously fulfilled by the windows: (1) Optical performance including wavefront distortion, absorption, and scatter; and (2) mechanical soundness. Mechanical forces to be considered include residual stresses within the window blank, mounting stresses, thermally induced stresses, pressure gradients, vibration, and tracking accelerations. For design verification and inspection during operation, it is desirable to have a full aperture description of the stress field and, also, to obtain such data without demounting the window. Birefringence measurements fulfill these conditions. In order to evaluate the feasibility of such a test, the authors have measured the stress optic behavior of zinc selenide (ZnSe) using He-Ne laser-illuminated interferometers.

Descriptors :   *Zinc selenides, *Stresses, *Infrared windows, Infrared lasers, Gas lasers, Interferometry, Laser materials, Birefringence

Subject Categories : Lasers and Masers
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE