Accession Number:

ADA113845

Title:

Alkali Halide FLIR Lens Development

Descriptive Note:

Final technical rept. 1 Oct 1979-31 Jul 1981

Corporate Author:

HONEYWELL CORPORATE MATERIAL SCIENCES CENTER BLOOMINGTON MN

Report Date:

1981-10-01

Pagination or Media Count:

149.0

Abstract:

This report describes development of materials and processes for environmental protection of alkali halide lenses. The alkali halide lenses are fabricated by direct hot forging, which yields a finished lens without need for polishing. These lenses are intended for potential application in FLIR thermal imaging systems. The lenses require coatings to protect them against water vapor in the atmosphere. The main emphasis in this report has been development of protective coatings for potassium bromide lenses. The most favorable coating developed consisted of a multilayer structure of arsenic triselenide, polyethylene and plasma-polymerized ethanes. This coating provides antireflective properties and minimal protection against water vapor. It does not meet the severe humidity specifications of Mil-Std-810B. In addition forging methods to fabricate lenses from KRS-5 were investigated. Optical testing methods were developed to determine the performance of the forged lenses.

Subject Categories:

  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE