Design and analysis of a 1-meter cryogenic mirror

摘要

Abstract: We describe the design and analysis of a high precision ($lambda@/7 rms wavefront where $lambda $EQ 0.6328 $mu@m) 1-m class fused quartz mirror for cryogenic applications. This design is based on requirements from the 1991 Space Infrared Telescope Facility (SIRTF) mission. We present primary mirror derived requirements, comparisons of mirror substrate materials, and mirror geometry trades and analyses. We also address the particular impact on the mirror design due to telescope integration and cryogenic testing in a 1-g environment. We discuss numerous aspects of our proposed mirror design. These include the process of how we selected fused quartz as our primary mirror substrate material as well as the selection of the `single arch' mirror cross section geometry. We also show compliance of this proposed design in meeting the top level optical performance as well as structural and verification requirements in a simple and cost effective manner compared with other geometries. !16