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Laser interferometric high-precision geometry (angle and length) monitor for JASMINE

Published online by Cambridge University Press:  01 October 2007

Y. Niwa ,
K. Arai ,
A. Ueda ,
M. Sakagami ,
N. Gouda ,
Y. Kobayashi ,
Y. Yamada  and
T. Yano
Y. Niwa
Affiliation:
National Astronomical Observatory Japan, 2-21-1 Osawa, Mitaka, Tokyo, 181-8588, JAPAN email: [email protected]
K. Arai
Affiliation:
National Astronomical Observatory Japan, 2-21-1 Osawa, Mitaka, Tokyo, 181-8588, JAPAN email: [email protected]
A. Ueda
Affiliation:
National Astronomical Observatory Japan, 2-21-1 Osawa, Mitaka, Tokyo, 181-8588, JAPAN email: [email protected]
M. Sakagami
Affiliation:
Cosmology and Gravity group Dept. of Fundamental ScienceFac. of Integrated Human Studies, Kyoto UniversityKyoto 606-8501, JAPAN
N. Gouda
Affiliation:
National Astronomical Observatory Japan, 2-21-1 Osawa, Mitaka, Tokyo, 181-8588, JAPAN email: [email protected]
Y. Kobayashi
Affiliation:
National Astronomical Observatory Japan, 2-21-1 Osawa, Mitaka, Tokyo, 181-8588, JAPAN email: [email protected]
Y. Yamada
Affiliation:
Theoretical Astrophysics Group Department of Physics, Kyoto UniversityKyoto 606-8502, JAPAN
T. Yano
Affiliation:
National Astronomical Observatory Japan, 2-21-1 Osawa, Mitaka, Tokyo, 181-8588, JAPAN email: [email protected]
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Abstract

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The telescope geometry of JASMINE should be stabilized and monitored with the accuracy of about 10 to 100 pm or 10 to 100 prad of rms over about 10 hours. For this purpose, a high-precision interferometric laser metrology system is employed. Useful techniques for measuring displacements on extremely small scales are the wave-front sensing method and the heterodyne interferometrical method. Experiments for verification of measurement principles are well advanced.

Keywords

instrumentation: interferometerstechniques: interferometrictelescopes
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S248: A Giant Step: from Milli- to Micro-arcsecond Astrometry , October 2007 , pp. 280 - 281
Copyright
Copyright © International Astronomical Union 2008

References

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