Laser Window Materials and Optical Coating Science
Abstract
The tasks under this program are organized into seven broad categories. First, the application of reactive atmosphere processing (RAP) chemistry techniques to the growth, polishing, grain growth stabilization, and AR coating passivation of poly- and single-crystal KC1 and of alkaline earth fluorides. Second, the application of press forging to RAP materials to enhance yield strength, and a study of the grain growth kinetics in such press forged materials. Third, a study of chemical-mechanical surface finishing techniques for the preparation of laser window materials. Fourth, a characterization of substrate and coating surface finishing using (1) scanning electron microscopy and X-ray diffraction, and (2) structural and chemical analysis using low-energy electron diffraction (LEED), Auger electron spectroscopy (AES), and microprobe techniques. Fifth, a comparison of AR coatings prepared under ultrahigh vacuum (less than ten to the minus 9th power Torr) and conventional ten to the minus 6th power to ten to the minus 9th power Torr) conditions and by ion beam sputtering techniques. Sixth, an optical evaluation of the AR-coated windows using infrared spectrophotometry, absorption calorimetry, ellipsometry, and scattering measurements. And seventh, a selection of substrate materials and AR- coated window specimens for study of laser damage mechanisms.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1977
- Accession Number
- ADB023408
Entities
People
- I. J. D'haenens
- James A. Harrington
- M. E. Pedinoff
- Morris Braunstein
- S. D. Allen
Organizations
- HRL Laboratories