1, the linearity is an important representation of the performance of the photodetector. The principle and method of the linear measurement of the optical probe are discussed. The method of superposition of the double light source is proposed, and the irradiance superposition is completed by integrating the ball. With the spectral characteristics of the internal current changes, the measurement results demonstrate the feasibility of using ultra-bright LEDs for irradiated light sources.

2, the design of computer programming automatic control to achieve intelligent and automated completion of the linear measurement of the photodetector for the purpose of the system of the various parts of the structure, principles, characteristics and innovation analysis.

3, the measurement system is mainly composed of integrating ball, two ultra-bright LED light source and digital power supply, signal amplification circuit and computer software results processing, display and other components, discussed the measurement system of uncertainty sources and processing methods.

4, the design is completed, the use of a silicon photodetector for a number of linear measurements, the results of the repetition accuracy of ± 0.5 ℅ or less, the measurement results show that the system design unique, high degree of automation and high precision, can be used as photodetector Linear measuring device.