A Visual Grading Method For Zinc Selenide, And New Surface And Bulk Absorption Values For Zinc Selenide.

Thomas C. Venable

doi:10.1117/12.935670

9 December 1983 A Visual Grading Method For Zinc Selenide, And New Surface And Bulk Absorption Values For Zinc Selenide.

Thomas C. Venable

Author Affiliations +

Proceedings Volume 0406, Optical Specifications: Components and Systems; (1983) https://doi.org/10.1117/12.935670
Event: 1983 Technical Symposium East, 1983, Arlington, United States

Abstract

A brief description of the chemical vapor deposition (CVD) manufacturing process for zinc selenide (ZnSe) is given. Some of the known associated material imperfections are described. A useful qualitative visual grading system for ZnSe is briefly described. This system is based on evaluating the three major types of material defects found in commercially available ZnSe. The three parameters considered are inclusions, powder, and clouds. An accurate calorimetric testing method for the absorptivity of ZnSe was used to gather data over a two year period. The results of this study show that the visual grading method is good for initial selection of "laser grade" ZnSe. Also reported is a lower surface absorption (0.0001 per surface) than previously published. The bulk absorption coefficient derived is higher than generally reported for ZnSe. The measured ZnSe bulk absorption coefficients range from 0.0005 to 0.0015 per centimeter, with an average of 0.00095 per centimeter for laser grade material.

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Thomas C. Venable "A Visual Grading Method For Zinc Selenide, And New Surface And Bulk Absorption Values For Zinc Selenide.", Proc. SPIE 0406, Optical Specifications: Components and Systems, (9 December 1983); https://doi.org/10.1117/12.935670

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