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. 08, 2019
Filed:
Nov. 23, 2016
Mitutoyo Corporation, Kanagawa-ken, JP;
Casey Edward Emtman, Kirkland, WA (US);
Robert Kamil Bryll, Bothell, WA (US);
Mitutoyo Corporation, Kanagawa-ken, JP;
Abstract
A method for providing an extended depth of field (EDOF) image includes: Periodically modulating an imaging system focus position at a high frequency; using an image exposure comprising discrete image exposure increments acquired at discrete focus positions during an image integration time comprising a plurality of modulation periods of the focus position; and using strobe operations having controlled timings configured to define a set of evenly spaced focus positions for the image exposure increments. The timings are configured so that adjacent focus positions in the set are acquired at times that are separated by at least one reversal of the direction of change of the focus position during its periodic modulation. This solves practical timing problems that may otherwise prevent obtaining closely spaced discrete image exposure increments during high frequency focus modulation. Deconvolution operations may be used to improve clarity in the resulting EDOF image.