Aspheric Mirror Figure Monitor and Alignment Aid.
Final technical rept. 28 Jul 70-10 Sep 71,
TE CO SANTA BARBARA CA
Pagination or Media Count:
The objective of this program has been to review and evaluate the various techniques for measuring aspheric mirror figure and for alignment of aspheric mirror trains, and then to pursue the most promising method through preliminary design and performance analysis. Although there are multi-mirror configuration designs available that fulfill an appreciable part of the needs and the design competence is being expanded, there are no comparably effective means of fabricating the required aspheric mirrors. Design capabilities cannot be realized, and the performance that is achievable is costly and time consuming. A preliminary design evaluation of the most promising concept, the slope scanner, shows that it can meet the design goals in measuring both concave and convex aspheric mirror figure, in situ, at the polishing machine. In addition to measuring mirror figure to any practicable degree of severity, the method extracts out the inadvertent effects of decenter and tilt scanner relative to test mirror, computes a best fit to the ideal figure function.