Abstract: As a photoelectric converter, charge coupled device (CCD) is widely used in the field of measurement because of its low cost, simple structure, fast scanning speed and high frequency response. It was proposed to use a monochrome linear array CCD to encode and debug the angle information in a non-contact optical manner.By collecting this signal and using the data processing module, the demodulation of the image signal was accomplished, and the angle measurement was realized. The system used TSL1401 and LPC2138 as the core to form an embedded measurement system, which used the TSL1401 to collect signals, then transferred them to the LPC2138 for data processing through A/D, and finally obtain the angle values. Through the optical measurement of angle, a new method of non-contact measurement was realized.