Accession Number:

ADA007791

Title:

Laser Window Surface Finishing and Coating Technology

Descriptive Note:

Final rept. 1 May 1973-31 Jan 1975

Corporate Author:

HUGHES RESEARCH LABS MALIBU CA

Report Date:

1975-01-01

Pagination or Media Count:

104.0

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.

Subject Categories:

  • Lasers and Masers
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE