Patent ID: 7332701

Claim:
A sensor device for sensing an image of an object, said sensor device comprising: a) a CMOS detector for detecting a radiation received from said object, said CMOS detector comprises a first detection surface and a second detection surface; b) a director for directing said received radiation towards a detection surface of said CMOS detector; and c) a light-emitting semiconductor which emits radiation toward said object during a predetermined operation period of said CMOS detector, wherein said light-emitting semiconductor is arranged to emit radiation towards an object whose image is to be detected by a predetermined one of said first and second detection surfaces, said predetermined one of said first and second detection surfaces having a lower sensitivity than the other detection surface and said first detection surface is at a front side of said CMOS detector and said second detection surface is at a back-etched rear side of said CMOS detector and wherein said front side corresponds to said predetermined one of said first and second detection surfaces.