Coding theodolite
Abstract
Abstract A CODING THEODOLITE COMPRISES A TRANSPARENT CIRCULAR PLATE HAVING A CONCENTRIC CODING SCALE FIXED ON THE VERTICAL AXIS OF THE THEODOLITE AND A FIRST DIAPHRAGM WITH AN APERTURE ARRANGED PARALLEL TO THE PLATE IN FRONT OF THE CODING SCALE. IN FRONT OF THE APERTURE IS A FIRST ILLUMINATION MEANS ON THE OTHER SIDE OF THE PLATE AND A SECOND DIAPHRAGM IS RIGIDLY FIXED ON THE HORIZONTAL AXIS OF THE THEODOLITE AND IS PROVIDED WITH AT LEAST ONE RADIAL SLIT. A SECOND ILLUMINATION MEANS IS PROVIDED ON ONE SIDE OF THE SECOND DIAPHRAGM FOR ILLUMINATING THE SLIT THEREIN AND A FIRST OPTICAL SYSTEM IS PROVIDED FOR RECEIVING A LIGHT BEAM PASSING THROUGH THE SLIT IN THE SECOND DIAPHRAGM AND FOR PRO- JECTING THE IMAGE OF THIS SLIT ONTO THE CODING SCALE OF THE PLATE, SUCH THAT ANGULAR MOVEMENTS OF THE SLIT IN THE SECOND DIAPHRAGM IN A VERTICAL PLANE IS EQUAL TO THE ANGULAR MOVEMENTS OF THE IMAGE OF THE SLIT ON THE CODING SCALE OF THE PLATE. A SECOND OPTICAL SYSTEM FACES THE CODING SCALE FOR PROJECTING TO A PHOTOREGISTER AN IMAGE OF A PORTION OF THE CODING SCALE WHICH IS IN FRONT OF THE APERTURE OF THE FIRST DIAPHRAGM AND AN IMAGE OF THE PORTION OF THE CODING SCALE WHICH IS ILLUMINATED BY THE IMAGE OF THE SLIT IN THE SECOND DIAPHRAGM.
Inventors
- 👤 Voldemar Garrievich Shults
Bibliographic Details
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