Interferometric Control Of A Beam Expander Consisting Of Multiple Telescopes

Christopher R. DeHainaut; Salvatore J. Cusumano; David E. Mick; George Lawrence

doi:10.1117/12.933544

4 November 1982 Interferometric Control Of A Beam Expander Consisting Of Multiple Telescopes

Christopher R. DeHainaut, Salvatore J. Cusumano, David E. Mick, George Lawrence

Proceedings Volume 0332, Advanced Technology Optical Telescopes I; (1982) https://doi.org/10.1117/12.933544
Event: 1982 Astronomy Conferences, 1982, Tucson, United States

Abstract

The central problem in the design of a phased array beam expander is devising an alignment technique for pointing and phasing the subaperture telescopes. The advantages and disadvantages of the standard alignment methods are discussed briefly. The most promising candidate technique, heterodyne interferometry, is developed into an optical configuration suitable for breadboard test. The optical configuration is discussed on the basis of reduction of misalignment modes, athermal design, coherence length and polarization effects. Fabrication methods are considered. It is concluded that the optical configuration presented has the capability to meet the severe alignment requirements of a multiple telescope laser beam expander.

Citation Download Citation

Christopher R. DeHainaut, Salvatore J. Cusumano, David E. Mick, and George Lawrence "Interferometric Control Of A Beam Expander Consisting Of Multiple Telescopes", Proc. SPIE 0332, Advanced Technology Optical Telescopes I, (4 November 1982); https://doi.org/10.1117/12.933544

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