CCD Two-Axis Autocollimator are integrated system for high precision small angle measurement, are widely used in calibration of multi-faceted prisms, optical prisms, multi-tooth indexing table, also can be measured with high-precision rail line straightness, parallelism, perpendicularity and relative position. In the test of precision measurement and instrument calibration can be used for non-contact position, can also be used for automatic measurement. The instrument has high precision, good stability, simple installation, convenient use and other characteristics, is the essential measure instrument in precision machinery, equipment manufacturing and related research, the measurement department.