Holographic correction and phasing of large sparse-array telescopes

Details Holographic correction and phasing of large sparse-array telescopes Holographic correction and phasing of large sparse-array telescopes

Mar 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005apopt..44.1355a&link_type=abstract

Applied Optics IP, vol. 44, Issue 8, pp.1355-1359

Physics

Optics

Scientific paper

I have constructed a 1-m-diameter telescope using separate, low-quality spherical primary mirror segments. A single hologram of the mirrors is used to correct the random surface distortions as well as spherical aberration, while simultaneously phasing the individual apertures together. I present experimental results of the removal of an error of thousands of waves to produce a diffraction-limited instrument operating over a narrow bandwidth. This technique promises to have many benefits in future space-based telescopes for imaging, lidar, and optical communications.

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