Laser Window Surface Finishing and Coating Technology
Abstract
The program covered six areas of study: surface finishing, surface characterization, coating techniques, optical evaluation, chemical analysis, and laser window damage studies. Potassium chloride surfaces have been produced on reactive atmosphere processed (RAP) KCl using HCl etching which show an order of magnitude improvement in KCl surface damage resistance. An etch-polish procedure is reported for ZnSe which results in a significant decrease in surface absorption. An inverse dependence of 10.6 micrometers optical absorption on film deposition rate is reported for germanium films. Ultrahigh vacuum deposited ThF4 films were found to have minimum absorptions of about 10/ cm. Rutherford backscattering for chemical analysis of films and window surface structure promises to be a new powerful technique. A unique modulated light ellipsometer which can operate over a broad wavelength range in the uv, visible, nearIR, and 10.6 micrometers was constructed.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1975
- Accession Number
- ADA007791
Entities
People
- A. I. Braunstein
- A. L. Gentile
- C. R. Giuliano
- M. Braunstein
- S. D. Allen
Organizations
- HRL Laboratories