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20 August 1986 A Hybrid Incremental/Absolute Optical Encoder For Measuring The Position Of Telescope Domes
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Abstract
This report presents a design for an inexpensive and highly reliable dome position encoder which has few moving parts and which eliminates the need for a Hechanical engagement to the dome. This hybrid incremental/absolute optical encoder is now in use on the dome of the 1-meter Nickel Telescope at Lick Observatory, and will soon be installed on the dome of the Observatory's Shane 3-meter Telescope. This report discusses the costs and important points of the construction, installation, operation, and maintenance of the encoder. It also explores the feasibility of using this encoder on the domes of large telescopes such as the Keck Observatory 10-meter.
© (1986) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Robert Kibrick, Calvin R. Delaney, and Jack Osborne "A Hybrid Incremental/Absolute Optical Encoder For Measuring The Position Of Telescope Domes", Proc. SPIE 0628, Advanced Technology Optical Telescopes III, (20 August 1986); https://doi.org/10.1117/12.963561
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