Optics: measuring and testing – Angle measuring or angular axial alignment
Reexamination Certificate
2007-03-13
2007-03-13
Pham, Hoa (Department: 2877)
Optics: measuring and testing
Angle measuring or angular axial alignment
C356S213000, C356S218000, C342S351000
Reexamination Certificate
active
10862240
ABSTRACT:
A method of measuring a field-of-view (FOV) of an optical sensor includes the steps of: (a) uniformly illuminating a FOV of the optical sensor; (b) moving, at an angle of motion, a slit across the FOV and illuminating the optical sensor through the slit; (c) measuring an optical response of the sensor through the slit, at evenly spaced positions of the moving slit; (d) changing the angle of motion and repeating steps (b) and (c); (e) repeating step (d) for equally spaced angles of motion; and (f) constructing a two-dimensional map of the FOV of the optical sensor, after completing step (e). Constructing the two-dimensional map of the FOV includes filtering the measured data using a filtered backprojection algorithm, and interpolating among the filtered measured data to form the two-dimensional map.
REFERENCES:
patent: 4724439 (1988-02-01), Wiley et al.
patent: 5243351 (1993-09-01), Rafanelli et al.
patent: 6259396 (2001-07-01), Pham et al.
patent: 6627893 (2003-09-01), Zeng et al.
Avinash C. Kak et al., “Principles of Computerized Tomographic Imaging”, IEEE Press, New York, 1988, pp. 49-57.
ITT Manufacturing Enterprises Inc.
Pham Hoa
RatnerPrestia
Ton Tri
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