Abstract: In this paper,a new type of optical probe for laser digitizer.which usesthe optical scanning technology, has been developed.The probe is composed of a small semiconductor laser and a high-resolution CCD sensor.It is able to measure the surface coordinates of a model quickly and accurately to provide 3-D NC(numerical control) data, A new optical CAD software is developed to design the optical syste.With the software, one can design a superminiature laser scanning probe.