Chemical Vapor Deposition of IR Materials for Reconnaissance
Abstract
The significance of this research and development program is the demonstrated feasibility of fabricating large infrared transmitting windows of zinc sulfide with good physical charcteristics by the chemical vapor deposition (CVD) process. Plates approximately 1 ft X 2 ft with good transmission between 8 and 12 micrometers were made and delivered as window blanks. Furthermore, the imaging properties of CVD ZnS, particularly in the visible end of the spectrum were significantly improved in comparison to material fabricated during an earlier program. It was also shown that it may be possible to extend the useful transmission range of zinc sulfide by fabricating a solid solution with zinc selenide. Material fabricated during this program had a transmittance in excess of 60% from 6 to 12.5 micrometers, a flexural strength of 15,000 psi, and a use limit above 200 C. The potential for improving the optical quality of the material through better control of the process and/or annealing the material after deposition was also demonstrated.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1972
- Accession Number
- AD0904414
Entities
People
- Anthony J. Capriulo
- Bernard A. Dibenedetto
- James Pappis
Organizations
- RTX