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. 17, 1989
Filed:
Jun. 24, 1987
Gunter Fetzer, Gundelfingen, DE;
Klaus Smetana, Windenreute, DE;
Erwin Sick GmbH Optik-Elektronik, Waldkirch, DE;
Abstract
An optical autocollimation measuring apparatus has a light transmitter-receiver arranged in a housing (15). An image of the light source (11) is formed in the objective (12) by a condensor (9) through the beam divider (20). The objective (12) in turn forms an image of the exit pupil of the condensor (9) in the plane of the retroreflector via the measuring path (13). The retroreflector (14) reflects the incident light beam substantially back on itself to the housing (15) of the light transmitter-receiver, where the received light beam is deflected by the beam divider (20) to a photoreceiver (21). A deflecting mirror (16) is located between the front objective (12) and the measuring path (13) and consists of two parts which are pivotable relative to one another, about a pivot axis (25) extending perpendicular to the optical axis (17), from an extended position into a position in which they are displaced by 90.degree. relative to one another. A suitable aperture diaphragm prevents the abutting edges of the two parts of the deflecting mirror being struck by the transmitted light beam.