An active telescope for the sub-millimetre PRONAOS balloon-borne project

Details An active telescope for the sub-millimetre PRONAOS balloon-borne project An active telescope for the sub-millimetre PRONAOS balloon-borne project

Dec 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990liaco..29..323b&link_type=abstract

In ESA, From Ground-Based to Space-Borne Sub-mm Astronomy p 323-328 (SEE N91-21986 13-89)

Astronomy and Astrophysics

Astronomy

2

Balloon-Borne Instruments, Imaging Techniques, Submillimeter Waves, Telescopes, Adaptive Control, Alignment, Mirrors, Numerical Control, Servomechanisms

Scientific paper

A telescope developed in the Frame of the PRONAOS (French acronym for national project for submillimeter observation) balloon-borne submillimeter project is described. The telescope is designed to provide maximum image stability and quality with as reduced a mass as possible. This has led to extensive use of composite materials and to the development of a semi active primary mirror made up of six segments. The position of each segment is permanently controlled by a computerized servoloop. First measurements show a global wave front error of 25 microns rms.

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