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:
Jan. 22, 1991
Filed:
Mar. 14, 1990
Mark G Baciak, West Melbourne, FL (US);
Abstract
A digital position monitor is disclosed which is used to output an X and Y position of a laser beam on a quadrant or lateral effect detector. The device includes two high speed microprocessors to perform either a quad cell or lateral effect algorithm in the open loop mode. In the closed loop operation, in addition to the algorithm, a digital filter is also executed. The decision to open or close the tilt loops is made by a central processor or by an external input to the central processor. Each microprocessor is designed to perform either the X or Y function. In brief, the operation is as follows: a detector senses the position error and provides a signal to analog circuits. The output from the analog circuits is applied in parallel to the circuits of the X and Y channels. Both channels comprise an analog-to-digital converter, a microprocessor and a digital-to-analog converter connected in series. Each channel provides an X or Y output. The microprocessor each channel is under the control of a central processor.