Design and construction of an astrometric astrograph

Daniel Vukobratovich; Tina M. Valente; Robert R. Shannon; Roger A. Hooker; Richard E. Sumner

doi:10.1117/12.130737

10 December 1992 Design and construction of an astrometric astrograph

Daniel Vukobratovich, Tina M. Valente, Robert R. Shannon, Roger A. Hooker, Richard E. Sumner

Proceedings Volume 1752, Current Developments in Optical Design and Optical Engineering II; (1992) https://doi.org/10.1117/12.130737
Event: San Diego '92, 1992, San Diego, CA, United States

Abstract

The Optical Sciences Center, University of Arizona, has designed and constructed a unique 'red corrected' astrometric astrograph objective lens for the United States Naval Observatory. A five element design, with an integral Schott OG550 filter, was developed to meet the requirement for a 2060 mm focal length, f/10 system. The lens provides a nearly zero distortion flat field of 5 by 5 degrees in the sky. A weight limit of 55 kg led to the use of a titanium lens barrel. Assembly tolerances are satisfied through the use of elastomeric subcell mounting of the individual elements, and an adjustable final element. The lens is hermetically sealed and uses a filter/dessicator system to insure the long term cleanliness of the optics.

Citation Download Citation

Daniel Vukobratovich, Tina M. Valente, Robert R. Shannon, Roger A. Hooker, and Richard E. Sumner "Design and construction of an astrometric astrograph", Proc. SPIE 1752, Current Developments in Optical Design and Optical Engineering II, (10 December 1992); https://doi.org/10.1117/12.130737

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