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Proceedings Paper

Two-axis pointing mechanism for Earth observation system using heterodyne interferometry positioning sensor
Author(s): Naozumi Tsuda; Katsutoshi Shimizu
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Paper Abstract

The 2-Axis pointing mechanism which we developed is designed for earth observation system. This pointing mechanism is expected to work on the geostationary orbit with high resolution compare with former one. To achieve high resolution, we adopted optical heterodyne technique to mirror angle detecting sensor instead of rotary encoder. The angle of the mirror is calculated from the distance between mirror base and a certain point of reverse side of the mirror. We can get the resolution of 0.029 (mu) rad. For mirror driving mechanism, we adopted a crank mechanism because a pointing mechanism working on the geostationary orbit is not necessary to rotate whole angle. We can get about 1:10 reduction ratio with a crank mechanism in addition to the reduction gear attached to the motor shaft. We have made experimental model and validated its performance.

Paper Details

Date Published: 29 October 1998
PDF: 8 pages
Proc. SPIE 3429, Current Developments in Optical Design and Engineering VII, (29 October 1998); doi: 10.1117/12.328540
Show Author Affiliations
Naozumi Tsuda, Fujitsu Labs. Ltd. (Japan)
Katsutoshi Shimizu, Fujitsu Labs. Ltd. (Japan)

Published in SPIE Proceedings Vol. 3429:
Current Developments in Optical Design and Engineering VII
Alson E. Hatheway; Robert E. Fischer; Malachy McConnell; Lawrence M. Germann; Lawrence M. Germann; Alson E. Hatheway; Malachy McConnell; Warren J. Smith, Editor(s)

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