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:
Feb. 20, 1979
Filed:
Jun. 09, 1977
Gerd Haeusler, Erlangen, DE;
Ernst Leitz Wetzlar GmbH, Wetzlar, DE;
Abstract
A method of and apparatus for increasing the range of depth of focus when optically imaging three dimensional objects having different depth ranges corresponding to desired image levels wherein the object is focused through at a plurality of levels to produce a plurality of images. At each level, the image produced has sharp details and unfocused details. Each image is filtered with a high pass filter to suppress unfocused details and to pass sharp details. The images are then summed to produce a composite image containing only the sharp details passed by the filtering step. If desired, the filter may be selectively by-passed in order to sum unfiltered images. By utilizing the method of an apparatus for practicing the instant invention more meaningful visual displays of three-dimensional objects are obtained.