The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 29, 1989
Filed:
May. 10, 1988
Hans-Rudolf Winiger, Zollbruck, CH;
Notron Engineering AG, Zollbruck, CH;
Abstract
An optoelectronic theodolite sensor contains in a frame, a cylindrical measurement cell half filled with an opaque liquid or entirely filled with two overlying immiscible liquids, each of which fills half of the cell, the first one being opaque and the other transparent to light. In the normal position of the measurement cell, the liquid or the interface between the two liquids forms with opaque side surfaces of the cell faces, an exact quadrant through which the light of a light source reaches an optoelectronic element located on the opposite side of the measurement cell. An angular displacement of the measurement cell causes a change in the intensity of the light reaching the optoelectronic element, which is converted and then applied as a function of the displacement angle .phi..