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A Space Imaging Concept Based on a 4-meter Spun-Cast Borosilicate Monolithic Primary Mirror
STEWARD OBSERVATORY TUCSON AZ
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The goal of this effort is to produce the largest monolithic telescope capable of being lifted by a Delta IV or Atlas V EELV to 500 km. A strategy using a 4 m borosilicate mirror is proposed. A preliminary architecture was identified with a new mirror design that is estimated to be 40 times stiffer than a meniscus mirror of the same mass. A mass budget and conceptual packaging details were completed. The mirror was evaluated for its ability to handle launch loads using a time based strength, flaw size, and estimated support stresses. A thermal figuring method was investigated as the wavefront correction system with power and performance estimates. Future efforts will demonstrate mirror casting and thermal figuring.
APPROVED FOR PUBLIC RELEASE