Rotary position measuring instrument

摘要

A rotary position measuring instrument that includes a light source and a graduated disk having a measuring standard. The rotary position measuring instrument including an optoelectronic detector assembly, wherein the graduated disk is rotatable relative to the light source and the detector assembly about an axis of rotation, wherein rotary-angle-dependent position signals are detectable via the detector assembly. The light source is spaced apart from the measuring standard by a first distance, and the detector assembly is disposed at a second distance from the measuring standard, wherein the second distance is different than the first distance. The graduated disk includes an optical element, which has an optical effect that results in a projecting an image of the light source into a position which has a third distance from the measuring standard, wherein the third distance is different than the first distance.

主权项

1. A rotary position measuring instrument, comprising:
a light source; a graduated disk comprising a rotationally symmetrical, reflective measuring standard; and an optoelectronic detector assembly, wherein said graduated disk is rotatable relative to said light source and said detector assembly about an axis of rotation, wherein in case of relative rotation, rotary-angle-dependent position signals are detectable via said detector assembly; wherein said light source is spaced apart from said measuring standard on said axis of rotation by a first distance, and said detector assembly is disposed at a second distance from said measuring standard, wherein said second distance is different in magnitude than said first distance; and wherein said graduated disk comprises an optical element, which has an optical effect that results in a projecting an image of said light source into a position which has a third distance from said measuring standard, wherein said third distance is different in magnitude than said first distance.