Profile projector CM-300C/D series are precise and excellent non-contact optical measuring instrument integrated with optical, mechanical, electronical technology. It is widely used in the field of mechanism, meter, electronic, rubber industry for quality control, it can measure all kinds of surface and profile of complicated work-pieces, such as cam, screw thread, gear, perform milling cutter and so on, and it is an effective metrical and analytic system for education, research institute and lab.