1. A control system to control the headlamps of a vehicle comprising: an image array sensor; and an optical system configured to image the scene forward of the controlled vehicle onto said image array sensor, said optical system including two or more lenses each configured to image objects emitting light within a predetermined spectral band onto different portions of said image array sensor, wherein the optical geometry of each lens is configured as a function of the predetermined spectral band within which the lens is to transmit light.