Performance of a novel tip-tilt secondary system on the Blanco 4-m telescope

Details Performance of a novel tip-tilt secondary system on the Blanco 4-m telescope Performance of a novel tip-tilt secondary system on the Blanco 4-m telescope

Aug 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998spie.3354..338p&link_type=abstract

Proc. SPIE Vol. 3354, p. 338-346, Infrared Astronomical Instrumentation, Albert M. Fowler; Ed.

Computer Science

Performance

Scientific paper

A low cost tip-tilt wavefront stabilization system has been put into operation on the Blanco 4-m telescope on Cerro Tololo. A light-weighted f/15 secondary mirror is driven by three commercial piezoelectric actuators. A dichroic at the Cassegrain focus separates optical reference and IR science beams. A steerable high-speed optical CCD sensor, coupled to a dedicated PC for control and image processing, provides positional feedback to the secondary. The IR field is reflected to one of several science sensors. We present a system description, initial performance measures at the telescope, and directions for future improvements.

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