Spectral information has a wide range of applications in many fields. With the proposal of compressed sensing technology, computational spectral imaging has emerged, which eliminates the complex optical components in the traditional method and dramatically improves the efficiency of spectral imaging by combining optical modulation and computational reconstruction. However, such approaches still have the disadvantages of being expensive and relying on the priori information. In this paper, we propose a spectral imaging method based on Fabry-Perot interference. Our approach is based on several filters with random transmittance. Combined with optical thin film technology, we design thinner dielectric layers to realize the construction of filters, which have unique broad-spectrum modulation properties to perceive spectral information. Compared with the existing wavelength modulation curves, our designed filters have higher transmittance and better compression effects to realize spectral reconstruction with a spectral resolution of 10 nm. Both simulation and experimental results demonstrate the effectiveness of the method used in this paper.
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