Design and analysis of 1-m beryllium space telescope

Details Design and analysis of 1-m beryllium space telescope Design and analysis of 1-m beryllium space telescope

Sep 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995spie.2542..244h&link_type=abstract

Proc. SPIE Vol. 2542, p. 244-257, Optomechanical and Precision Instrument Design, Alson E. Hatheway; Ed.

Computer Science

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Scientific paper

We describe the design and analysis of a prototype Beryllium telescope with a near one meter aperture for space laser altimeter application. The design target for this telescope is 25 kG mass, 100 micro-radian boresight, and 100 micro-radian blur spot. We first conduct a parametric study to optimize the design of the primary mirror. Our study shows that the degree of lightweighting is limited by the quilting parameter which is fixed by optical fabrication standards. We further discuss the options for the metering structure design, and the rationale for our selection. A number of analysis were conducted to validate the final design. To assess the optical performance, we model the telescope using an in-house program, SPOT, which enables individual allocation of various 'real-life' optical aberrations. The result of our modeling indicates an expected spot size of 53 micro-radians. We model the primary mirror and the telescope using finite element technique; our analysis indicates that the telescope has adequate margins to survive the launch environment and meet boresight requirements during operations. Lastly, we discuss some of the lessons learned through our experience, and suggest some possible future design approaches.

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