The history of Fabry-Perot (hereinafter referred to as F-P) interferometer is more than 120 years. Because Fabry-Perot etalon has the advantages of high transmittance, high spectral resolution, adjustable central wavelength, fast response, simple structure and a large optical radius. Since the 1950s, it has been used in conjunction with other spectrometers. Especially for solar physics, Fabry-Perot based 2D imaging spectrograph and 2D magnetograph can serve these needs of many dynamic phenomena on the sun that require high time, spatial, spectral resolution. So it's been used a lot. At present, the F-P interferometer have been used in many foreign solar telescope observation stations.Because the data that can be retrieved at home and abroad show that the F-P interferometer control system is still an analog circuit. But full analog circuit is sensitive to temperature, and the time stability is not good, so we hope to improve the performance of these two aspects through full digital research. This topic focuses on the implementation of the core modules related to the digitization of F-P filters. Explore the technical route and feasibility of full digitalization of F-P controller. The specific content is to prove the feasibility of digitalization of the control system by studying the accuracy requirements of the F-P front-end AD converter, and designs and develops the digital circuit of the key module. Including AD / DA data acquisition module, digital filter and digital phase-sensitive detector and conduct experiment.
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