Patent ID: 8085391

Claim:
A method for forming a chief ray angle (CRA) profile of an imaging lens having a field of view (FOV) oriented toward a pixel array, the method comprising the steps of: positioning at least one CRA sensor (a) between an edge of the pixel array and an edge of the FOV, and (b) at one or more respective predetermined lens height percentages from a pixel located at a center of the pixel array to form a lens profile detector; transmitting light through the imaging lens toward the pixel array; detecting the transmitted light by multiple detectors included in the at least one CRA sensor, wherein each detector is configured to detect a different predetermined CRA; for each CRA sensor, selecting a largest amplitude of light detected by the multiple detectors, wherein the largest amplitude of light represents a CRA of the transmitted light; determining, by a processor, at least one data point of the CRA profile, using the predetermined CRA selected as having the largest amplitude at the corresponding one or more predetermined lens height percentages; forming at least one other lens profile detector between one or more other edges of the pixel array and the edge of the FOV; repeating the steps of detecting the transmitted light, selecting the largest amplitude of light and determining the at least one data point for one or more other CRA profiles corresponding to the at least one other lens profile detector; measuring at least one difference between the CRA profile and the one or more other CRA profiles; and determining at least one of a tilt of the imaging lens in at least one direction or an offset of a center of the imaging lens in at least one direction based on the measured at least one difference.