Patent ID: 7499090

Claim:
An imaging system comprising: a rolling-reset imager having a field of view, the field of view including a width extending in a direction that a moving object moves, the rolling-reset imager forming an image of the moving object when the object moves through the width of the field of view extending in the direction the object moves, the rolling-reset imager including image sensor pixels, the rolling-reset imager having a minimum frame rate based on the velocity at which the object moves, the width of the field of view in the direction the object moves, and the width of the object in the direction the object moves; a light source illuminating the object with pulsed light having an illumination frequency spectrum and an illumination pulse width, the pulse width defining an effective exposure time for forming the image of the object; and an optical filter disposed between the object and the rolling-reset imager, the optical filter having a frequency pass band permitting transmission of a significant portion of the illumination frequency spectrum while at least partially inhibiting transmission of at least some light having frequencies outside the illumination frequency spectrum.