Lightweight Zerodur Mirror Technology

reportActive / Technical Report | Accession Number: ADA123538 | Open PDF

Abstract:

The manufacturing techniques applicable to the fabrication of lightweight passive mirror blanks from Zerodur glass-ceramic are demonstrated. The techniques include bending and welding Zerodur to form lightweight eggcrate cores and frit bonding thin facesheets to the cores. Physical property measurements show that the joints meet the requirements for a mirror blank design. The thermal performance of a lightweight Zerodur mirror is predicted analytically and is superior to the performance of conventional ULE mirrors. The cost and schedule for establishing a large mirror blank fabrication facility are estimated.

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