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Spectral reconstruction method based on micro-nano structure filter modulation and sparse matrix transformation

A technology of micro-nano structure and sparse matrix, applied in color/spectral characteristic measurement, complex mathematical operations, instruments, etc., can solve the problem of low accuracy of reconstructed spectrum, achieve the effect of improving accuracy and reducing root mean square error

Active Publication Date: 2022-05-17
XIDIAN UNIV
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Problems solved by technology

However, since this method does not deal with the noise error, the obtained reconstructed spectrum will still be affected by the noise error, resulting in low accuracy of the reconstructed spectrum

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  • Spectral reconstruction method based on micro-nano structure filter modulation and sparse matrix transformation
  • Spectral reconstruction method based on micro-nano structure filter modulation and sparse matrix transformation
  • Spectral reconstruction method based on micro-nano structure filter modulation and sparse matrix transformation

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Embodiment Construction

[0036] The invention is further described in detail below in combination with the accompanying drawings and specific embodiments:

[0037] reference Figure 1 , the invention comprises the following steps:

[0038] Step 1) construct micro nano structure filter array:

[0039] Build includes M × Filter array of N micro nano structure filters; The micro nano structure filter comprises a substrate and a film layer covering the surface of the substrate. The film layer is etched with a nanohole array composed of a plurality of circular nanoholes or rectangular nanoholes centered on the circular nanoholes or rectangular nanoholes and symmetrically distributed around the central nanoholes. The substrate adopts SiO2 glass material, and the film layer adopts one of metal material, metal oxide material and semiconductor material; In this embodiment, M = 10, n = 5;

[0040] reference resources Figure 2 , the 50 micro nano structure filters in this embodiment include four structures, among whi...

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Abstract

The present invention proposes a spectral reconstruction method based on micro-nano structure filter array modulation and sparse matrix transformation. The implementation steps are: constructing a micro-nano structure filter array; Measurement; sampling the transmission spectrum of each micro-nano structure filter at discrete points; measuring the transmitted light intensity through each micro-nano structure filter; constructing a matrix equation; performing discrete cosine transform on the matrix equation; discrete The cosine transformation matrix equation performs a sparse transformation; obtains the spectral reconstruction result. The present invention solves the problem that the noise error is not processed in the prior art, and the acquired reconstructed spectrum will still be affected by the noise error, and at the same time effectively reduces the root mean square error of the reconstructed spectrum. Simulation results show that the present invention effectively improves the accuracy of spectral reconstruction.

Description

technical field [0001] The invention belongs to the technical field of optical information processing, and relates to a spectral reconstruction method, in particular to a spectral reconstruction method based on micro nano structure filter array modulation and sparse matrix transformation, which can be used for spectral analysis and spectral measurement. Background technology [0002] The different movement of electrons in the atoms of different substances leads to the differences of their emitted light spectra. Therefore, the spectrum can well reflect the properties of the substance itself. Therefore, the spectrum plays an important role in many fields of modern science. Spectrometer is the basic equipment for spectral analysis and spectral measurement. It is widely used in material analysis, light source characteristic analysis and biosensor. At present, most of the existing spectrometers use prism, grating or interferometer based on light interference. The spectral resolution o...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/25G06F17/14G06F17/16
CPCG01N21/25G06F17/147G06F17/16
Inventor 刘德连郭文豪叶云龙张建奇
Owner XIDIAN UNIV
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