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:
May. 23, 1978
Filed:
Jun. 23, 1975
Applicant:
Inventors:
Jorg Willhelm, Nauborn, DT;
Dietmar Kaul, Solms, DT;
Assignee:
Ernst Leitz GmbH, Wetzlar, DT;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
2502 / ; 356111 ; 356169 ;
Abstract
A system for one dimensional or multi-dimensional modulation of light proportional to the path, angle or speed, preferably the photoelectric signal analysis of the movement of an object carrier in an interferometer. At least three consecutive diffraction processes take place in the optical path of which one starts from a point and of which the last condenses the light bundles into at least two points. The light bundles are guided in the same direction of diffraction fulfilling the coherence condition where the surfaces of diffraction are spaced relatively far apart and do not use imaging optics.