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:
May. 12, 1992
Filed:
Apr. 08, 1991
Dieter Michel, Traunstein, DE;
Andreas Franz, Kienberg, DE;
Dr. Johannes Heidenhain GmbH, Traunreut, DE;
Abstract
In an integrated optical arrangement, such as a photoelectric position measuring arrangement, a diffraction grid is scanned by light beam diffraction by a scanning unit having a laser. A light beam bundle emanating from the laser is split by the diffraction grid into two diffraction beam bundles, which are inserted into the top input waveguides of a waveguide coupler by two coupling elements. The two diffraction beam bundles interfere in the waveguide coupler and impinge on three detectors located at three output waveguides of the waveguide coupler for obtaining measured values. For readjustment of the optimal emission wavelength of the laser, an additional diffraction beam bundle emanating from the diffraction grid is entered into said integrated optical sensor arrangement by an additional coupling element. The additional beam bundle triggers a detector for generating a control signal to control the optimal emission wavelength of the laser.