A Hybrid Incremental/Absolute Optical Encoder For Measuring The Position Of Telescope Domes

Robert Kibrick; Calvin R. Delaney; Jack Osborne

doi:10.1117/12.963561

20 August 1986 A Hybrid Incremental/Absolute Optical Encoder For Measuring The Position Of Telescope Domes

Robert Kibrick, Calvin R. Delaney, Jack Osborne

Proceedings Volume 0628, Advanced Technology Optical Telescopes III; (1986) https://doi.org/10.1117/12.963561
Event: 1986 Astronomy Conferences, 1986, Tucson, United States

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.

Citation Download Citation

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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