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Redesigning a Baker-Nunn Camera for CCD Imaging

Published online by Cambridge University Press:  25 April 2016

B. D. Carter ,
M. C. B. Ashley ,
Y-S. Sun  and
J. W. V. Storey
B. D. Carter
Affiliation:
School of Physics, University of New South Wales, Kensington NSW 2033
M. C. B. Ashley
Affiliation:
School of Physics, University of New South Wales, Kensington NSW 2033
Y-S. Sun
Affiliation:
School of Physics, University of New South Wales, Kensington NSW 2033
J. W. V. Storey
Affiliation:
School of Physics, University of New South Wales, Kensington NSW 2033
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Abstract

The University of NSW’s Automated Patrol Telescope is a modified Baker-Nunn satellite tracking camera, now used for CCD imaging of astronomical objects. The f/1 Baker-Nunn optical design gives a 30° field of view with an approximately spherical focal surface of radius ≈500 mm. While the focal plane curvature is tolerable across the 1.4° × 1.0° field of the present CCD, it becomes unacceptable when a larger CCD is used. In addition, the use of glass filters in the highly convergent beam produces intolerable spherical aberration. We present a design modification to the original Baker-Nunn which enables a 5° diameter flat field to be produced when using B, V, R or I filters. By making this modification, we plan to perform multicolour imaging, using a new large-format CCD with a 2.9° × 1.9° field of view.

Type
Instruments and Basic Astronomy
Information
Publications of the Astronomical Society of Australia , Volume 10 , Issue 1 , 1992 , pp. 74 - 76
Copyright
Copyright © Astronomical Society of Australia 1992

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References

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