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, J. Alan Schier, Oscar Rodriguez, Oscar Rodriguez, Brett Sandberg, 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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