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The Use of Astrometric Instruments in Vacuum Chambers

Published online by Cambridge University Press:  04 August 2017

Ningsheng Hu
Ningsheng Hu*
Affiliation:
Nanjing Astronomical Instruments Factory, Academia Sinica, Nanjing, China

Abstract

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This paper discusses the effect of using a vacuum chamber with a horizontal entrance window to eliminate astronomical refraction, dispersion and irregular refraction in a telescope tube. Some engineering problems arising in connection with the entrance window are dealt with. The actual results obtained by vacuum photoelectric astrolabes and a vacuum photographic zenith tube are presented.

Type
VI. Transit Circles and Astrolabes
Information
Symposium - International Astronomical Union , Volume 109: Astrometric Techniques , 1986 , pp. 469 - 481
Copyright
Copyright © Reidel 1986 

References

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