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. 31, 1978
Filed:
Oct. 23, 1975
Ernst Leitz GmbH, Wetzlar, DT;
Abstract
Apparatus to automatically analyze stereoscopic images comprising the determination of the maximum degree of correlation between two similar images of the same object projected by two objectives, for instance in a rangefinder, wherein the two images are superimposed on one or two spatial frequency filters identical in their structures, and wherein the particular generated superimposition signal, is preferably applied to a particular photoelectric detector and wherein the output signals from the latter are used for display and/or control purposes. The apparatus is improved by a system (20,20',21,21',22-25; 30-34) for generating a reference beam indicating mechanical changes affecting the image position of at least one of the measuring beams, at least one photoelectric detector (28,29;40) being associated with the one reference beam, the output signals from the one detector corresponding to the mechanical changes being used to display and/or correct the changes or the effects of same.