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:
Dec. 14, 1993
Filed:
Jan. 27, 1992
Matthias Chour, Jena, DE;
Mario Netzel, Bransbedra, DE;
Jenoptik GmbH, Jena, DE;
Abstract
Symmetrical carrier frequency interferometer for length, distance and speed measurements with beam-deflecting and beam-splitting elements, as well as a fixed reference mirror and a movable measurement mirror. The optically active surfaces positioned downstream of a first polarization-splitting layer are arranged in mirror-symmetrical manner with respect to the latter. Upstream of a second polarization-splitting layer inclined by 45.degree. a .lambda./2 plate is located in one of the two beam paths and in the passage direction behind said layer are located the .lambda./4 plate, the fixed reference mirror and the movable measurement mirror. There is at least one reversing element in the reflection direction.