Research on detecting spot selection and signal pretreatment of four-quadrant detector

Wenli Liu; Shaokun Han

doi:10.1117/12.2288640

10 January 2018 Research on detecting spot selection and signal pretreatment of four-quadrant detector

Wenli Liu, Shaokun Han

Proceedings Volume 10617, 2017 International Conference on Optical Instruments and Technology: Optoelectronic Devices and Optical Signal Processing; 106170I (2018) https://doi.org/10.1117/12.2288640
Event: International Conference on Optical Instruments and Technology 2017, 2017, Beijing, China

Abstract

The four-quadrant detector is a photoelectric position sensor based on the photovoltaic effect. It is widely used in many fields such as target azimuth measurement, end-guided weapon and so on. The selection of the spot and the calculation of the center position are one of the main factors that affect the accuracy of the position measurement of the fourquadrant detector. In order to improve the positioning accuracy of the four-quadrant detector, the method of determining the best spot size is obtained from the theoretical research. The output signal of the four-quadrant detector is a weak narrow pulse signal, which needs to be magnified and widened at high magnitudes. The signal preprocessing method is simulated and experimentally studied. Detecting the spot and the signal processing is realized by the four-quadrant detector, which is important for the use of quadrant detectors for high-precision position measurements.

Citation Download Citation

Wenli Liu and Shaokun Han "Research on detecting spot selection and signal pretreatment of four-quadrant detector", Proc. SPIE 10617, 2017 International Conference on Optical Instruments and Technology: Optoelectronic Devices and Optical Signal Processing, 106170I (10 January 2018); https://doi.org/10.1117/12.2288640

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