Image analysis – Image enhancement or restoration – Focus measuring or adjusting
Patent
1995-08-02
1998-06-16
Johns, Andrew W.
Image analysis
Image enhancement or restoration
Focus measuring or adjusting
382284, G06K 936
Patent
active
057684014
ABSTRACT:
A balanced focus system and method achieve optimal focus of different areas of an object that are concurrently imaged and then combined to form a combined image. The balanced focus method is particularly suited for, but not limited to, use with an automatic inspection system for contactlessly measuring at an endface of an optical fiber termination the eccentricity of an optical fiber core relative to a theoretical ideal center of an alignment surface of the termination. The inspection system has an imaging system with a feature imager and one or more boundary segment imagers but preferably four in number, a focus adjustment mechanism (FAM) for adjusting the position of the imagers relative to the imaged object along an optical axis, and a machine vision system for receiving image data from the foregoing imagers and configured to control the FAM. The feature imager is positioned to capture an image of the feature (e.g., fiber core endface), and the one or more boundary segment imagers are positioned to capture an image of a corresponding boundary segment of the object (e.g., termination endface). The machine vision system determines the eccentricity based upon the feature image and the one or more boundary segment images. Significantly, the machine vision system employs the balanced focus system and method to achieve an optimal focus position for the imaging system based upon a series of combined images and a statistic S that is computed for each of the sampling locations.
REFERENCES:
patent: 4738507 (1988-04-01), Palmquist
patent: 4738508 (1988-04-01), Palmquist
patent: 4787698 (1988-11-01), Lyons et al.
patent: 4825092 (1989-04-01), Mehadji
patent: 5471310 (1995-11-01), Spigarelli et al.
patent: 5647025 (1997-07-01), Frost et al.
Norland, Eric A., "Defining and Measuring Physical Parameters of PC Polished Connectors," The 10th Annual National Fiber Optic Engineers Conference, San Diego, CA, Jun. 12-16, 1994, pp. 259-265.
Harding, Kevin et al., "Light Engineering for Machine Vision: Techniques and Applications," Part 1 and Part 2, Mar. 2-3, 1994, Ann Arbor, Michigan, Manufacturing Engineering Certification Institute sponsored by SME.
Csipkes Andrei
Palmquist John Mark
Johns Andrew W.
Lucent Technologies - Inc.
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