1 June 1994 New telescope encoder
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Abstract
We describe a new telescope encoder that overcomes several traditional problems. The system uses a camera, a ruled scale, and a robust image processing algorithm to determine angular position. The ruled scale can be any of a variety of materials. The system is noncontacting, dirt insensitive, and has typical alignment tolerances of 0.25 mm.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
J. Alan Schier, Oscar Rodriguez, Brett Sandberg, "New telescope encoder", Proc. SPIE 2199, Advanced Technology Optical Telescopes V, (1 June 1994); doi: 10.1117/12.176244; https://doi.org/10.1117/12.176244
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