The Design of Linear Scanning Control System for Confocal Microscope
In order to realize the linear scanning of the galvanometer in the confocal microscope system and improve the noise of the galvanometer and the stability of the system,a galvanometer scanning control system based on FPGA is designed.The system generates the galvanometer scanning signal through FPGA,and the output signal amplitude and frequency are accurate.It communicates with the host computer through the ARM chip to realize the scanning control of the galvanometer system.On the scanning waveform,cubic spline interpolation is performed on the endpoints of the triangu-lar wave to make the speed and acceleration continuous during the scanning process of the galvanometer and improve the operational stability of the galvanometer.Frequency control is performed through the accumulator on the output waveform,and the frequency resolution is high.The galvanometer scanning control system designed in this article is compact in size,which can effectively improve the integration of the confocal microscope system and reduce costs.
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