Evaluation of Epoxies to Provide Stress-Free Bonding of Pyroceram Mirrors.
Abstract
This report describes the effort undertaken by Aeroflex Laboratories to achieve mirror assemblies (SM-D-657649) which are capable of meeting the required optical performance under environmental conditions. In the course of a 9 month study, 22 mirrors were assembled using variations in techniques and controls to obtain good mirrors. The results of this effort have shown that the specified two-part epoxy cement presents major difficulties in achieving these results. Moreover, even under carefully controlled conditions, the final result (From an optical performance viewpoint) may still be random and the production yield severely affected. This would be reflected in cost impact to the applicable systems. The study also shows that an alternate cement has been identified which permits a simpler (and cheaper) assembly technique to be used with a consistently excellent optical performance achieved. As of this report date, 9 mirrors out of 9 have been successfully assembled and passed the required MTF test specifications. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1979
- Accession Number
- ADA087843