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:
Oct. 15, 1985
Filed:
Mar. 31, 1983
Applicant:
Inventors:
Peter Vogt, Heidenheim, DE;
Horst Kunzmann, Braunschweig, DE;
Assignee:
Carl-Zeiss-Stiftung, Oberkochen, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01J / ;
U.S. Cl.
CPC ...
250205 ; 250225 ; 372 32 ;
Abstract
The invention contemplates a beam splitter which consists of a phase grating (5) which transmits at zero order the greatest part of the radiation of a two-mode laser (1) and which diffracts a relatively small part of the radiation, symmetrically at 1 order and -1 order, respectively. The intensity of components of the radiation polarized perpendicular to each other and associated with the two modes is measured by detectors (11, 12) in front of which polarization sheets (9, 10) are arranged as analyzers, and outputs of the detectors are used to regulate the center frequency of the laser tube (1).