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Proceedings Paper

Plaskett Telescope high-precision line-scan camera encoder project
Author(s): Leslie K. Saddlemyer; Gerard F. McLean
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Paper Abstract

Improvements to the general dome conditions and the use of near IR detectors at the National Research Council of Canada's 1.8m Plaskett Telescope have stressed the abilities of the existing encoders. An encoding system that could be installed without telescope downtime and with a minimal impact on resources was necessary. These, and other, issues motivated the development of a method of non-contact encoding using a long line-scan CCD, a precision insensitive ruled tape and digital imaging metrology. Based on previously published simulation and experimental result a project to install such a system on the polar axis of the Plaskett Telescope was initiated. In this paper we present the overall design strategy, processing algorithms and initial test result and analysis. We end with recommendations to improve the capabilities of the approach.

Paper Details

Date Published: 26 May 1998
PDF: 12 pages
Proc. SPIE 3351, Telescope Control Systems III, (26 May 1998); doi: 10.1117/12.308823
Show Author Affiliations
Leslie K. Saddlemyer, National Research Council Canada (Canada)
Gerard F. McLean, Univ. of Victoria (Canada)

Published in SPIE Proceedings Vol. 3351:
Telescope Control Systems III
Hilton Lewis, Editor(s)

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