An absolute optical linear or rotary encoder which encodes the motion of an object (3) with increased resolution and encoding range and decreased sensitivity to damage to the scale includes a scale (5), which moves with the object and is illuminated by a light source (11). The scale carries a pattern...http://www.google.fr/patents/US5965879?utm_source=gb-gplus-shareBrevet US5965879 - Method and apparatus for ultra-high-sensitivity, incremental and absolute optical encoding
Method and apparatus for ultra-high-sensitivity, incremental and absolute ...
