Plaskett Telescope high-precision line-scan camera encoder project

Leslie K. Saddlemyer; Gerard F. McLean

doi:10.1117/12.308823

26 May 1998 Plaskett Telescope high-precision line-scan camera encoder project

Leslie K. Saddlemyer, Gerard F. McLean

Proceedings Volume 3351, Telescope Control Systems III; (1998) https://doi.org/10.1117/12.308823
Event: Astronomical Telescopes and Instrumentation, 1998, Kona, HI, United States

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.

Citation Download Citation

Leslie K. Saddlemyer and Gerard F. McLean "Plaskett Telescope high-precision line-scan camera encoder project", Proc. SPIE 3351, Telescope Control Systems III, (26 May 1998); https://doi.org/10.1117/12.308823

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