Ultra-lightweight optics for laser communications

Daniel Vukobratovich

doi:10.1117/12.18186

1 July 1990 Ultra-lightweight optics for laser communications

Daniel Vukobratovich

Proceedings Volume 1218, Free-Space Laser Communication Technologies II; (1990) https://doi.org/10.1117/12.18186
Event: OE/LASE '90, 1990, Los Angeles, CA, United States

Abstract

Recent applications of the very light Al/SiC metal-matrix composite SXA in the construction of telescopes for use as receiver antennas in optical intersatellite communication systems are reviewed and illustrated with drawings and diagrams. Data on the mechanical properties (specific stiffness, fundamental frequency, dynamic response, and fracture toughness) and the thermal expansion, distortion, and diffusivity of SXA are compared with those for Al 6016-T6, Be I-70A, SiC, and Zerodur in tables, and the advantages of SXA structural foams of density 250-500 kg/cu m are indicated. The criteria evaluated for optimization of the mirror shape and the overall telescope design are discussed, and four prototype Cassegrain telescopes (with Meinel or Dall truss structures) are described in detail.

Citation Download Citation

Daniel Vukobratovich "Ultra-lightweight optics for laser communications", Proc. SPIE 1218, Free-Space Laser Communication Technologies II, (1 July 1990); https://doi.org/10.1117/12.18186

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