Patent ID: 7030987

Claim:
A color sensing device for sensing light emitting from a target surface, the device comprising: three or more light sensors, each sensor configured with a bubble shaped lens and adapted to detect light from the target surface; a sensor locating element having three or more light passages and corresponding alignment holes, each hole adapted to receive a corresponding one of the bubble shaped lenses, thereby aligning each sensor with a corresponding light passage; a tube block operatively coupled in alignment with the sensor locating element, the tube block having three or more filter cavities and corresponding light passages, each light passage in alignment with a corresponding light passage of the sensor locating element; and three or more distinct light filter stacks including one or more filter elements, each filter stack placed in a corresponding one of the filter cavities, thereby providing three or more overlapping spectrally selective channels, with each spectrally selective channel designed to provide a pre-defined field of view between the target surface and a corresponding one of the light sensors.