Opto-electrical position-measuring device
作者： Wolfgang Dr. Holzapfel
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摘要: Light from a light source (8) is modulated by several grids (4,1) which can be displaced relative to one another causing deflected beams interfere with another. Several photo-detectors (6,7) are used form signals phase and at least of the grid has diagonal zones arranged behind other (2,3) identical or only insignificantly different pitch periods (TT). Each periodic markings spaced diagonally apart across direction measurement. This displacement differs 180 degrees part these directed photo-detectors.
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