Alkali Halide FLIR Lens Development
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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1981
- Accession Number
- ADA113845
Entities
People
- D. K. Greenlaw
- D. Stoltzmann
- F. M. Schmit
- J. F. Ready
- J. W. Lin
- R. J. Stokes
- Richard H. Anderson
- T. J. Moravec
Organizations
- Honeywell International, Inc.