1. A system for measuring the height of an object having an outer surface, comprising: a source, having two or more light sources, including a first light source providing a first light beam having a structured energy pattern for irradiating the outer surface of the object; said structured energy pattern having a constant dimension, and a second light source providing a second light beam for uniformly illuminating the outer surface of the object; a sensor, for individually sensing the outer surface of the object as irradiated by said first light beam and said second light beam; a system for removing interference resulting from unwanted markings on the surface of the object by dividing said first light beam sensed by said sensor with said second light beam sensed by said sensor; and a system for calculating the height of the object in response to said constant dimension of said structured pattern irradiating said outer surface of the object and sensed by said sensor.