Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Reexamination Certificate
2007-03-20
2007-03-20
Luu, Thanh X. (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Photocell controls its own optical systems
C250S201200, C356S004090, C348S349000, C348S354000, C348S356000
Reexamination Certificate
active
10976957
ABSTRACT:
Systems and method for determining, based on a gray scale image, focus of an imaging system. A method of this invention includes the steps of: a) acquiring a gray scale image of a test target, b) binarizing the acquired gray scale image, c) analyzing the binarized acquired image, d) adjusting focus of acquisition optics of the imaging system, and e) repeating steps a) through d) until a substantially maximum number of line pairs of a number of groups of line pairs of the test target is obtained, wherein each group from the number of groups of line pairs has a predetermined spatial frequency.
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Memorandum from O. Lopez, Attorney for Applicant dated Oct. 25, 2005.
Burns & Levinson LLP
Erlich Jacob N.
Lockheed Martin Corporation
Lopez Orlando
Luu Thanh X.
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