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:
Jun. 02, 1998
Filed:
Jun. 12, 1996
Dieter Michel, Traunstein, DE;
Walter Huber, Traunstein, DE;
Dr. Johannes Heidenhain GmbH, Traunreut, DE;
Abstract
An optical device, such as a position measuring instrument, having a source of light and a diffraction element for receiving the light, creating partial light beams which interfere with one another, and producing from the interfering partial light beams a first beam of light projecting along a first direction and producing a second beam of light projecting along a second direction. The optical device further includes a first optical projecting element positioned to receive the first beam of light and producing a first focused beam of light and a second optical projecting element positioned to receive the second beam of light and producing a second focused beam of light. Furthermore, the optical device has a first photodetector to receive and detect the first focused beam of light and a second photodetector to receive and detect the second focused beam of light.