Photosensor array with compensation for optical aberrations and illumination nonuniformity

摘要

A photosensor array (600, 602, 604, 700, 702, 704, 800, 802, 804, 1006) in which the geometry of the array provides compensation for aberrations and non-uniformities in an associated optical system (200, 300, 400), including compensation for distortion, chromatic difference of magnification, non-uniform light transmission/reflection/absorption/illumination, field curvature and longitudinal (axial) chromatic aberration. To compensate for distortion, sensor elements (602, 604) are placed along curves rather than being placed linearly. To compensate for lateral color (chromatic difference of magnification), sensor element (700, 702, 704) spacing is made non-uniform. To compensate for non-uniform light transmission/reflection/absorption/illumination, sensor element (800, 802, 804) area is made non-uniform. Finally, to compensate for field curvature and longitudinal (or axial) chromatic aberration, sensor elements are made non-planar (904). Example embodiments are given for line arrays and for matrix arrays (1006).