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:
Jul. 21, 1998
Filed:
Jun. 20, 1996
Applicant:
Inventors:
Karl-Heinz Bechstein, Jena, DE;
Beate Moeller, Jena, DE;
Klaus Dieter Salewski, Greifswald, DE;
Andreas Wolfram, Karlsburg, DE;
Assignee:
Carl Zeiss Jena GmbH, Jena, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01B / ;
U.S. Cl.
CPC ...
356349 ; 356358 ; 356361 ;
Abstract
The present invention is directed to a heterodyne interferometer arrangement with tunable laser light sources for absolute distance measurement. The phase angle changes which occur in the synthetic interference signals when varying the laser frequencies are recorded and evaluated. The arrangement also enables error-free distance measurement in the event of a change in the mathematical sign of the phase changes due to frequency jitter.