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A Spectral Detection Method Based on Digital Projection

A technology of spectral detection and projection algorithm, applied in the field of spectral detection, can solve the problem that the spectrum cannot have high resolution and high signal-to-noise ratio at the same time, and achieves to prevent the laser energy from being too high, fast high-resolution and high signal-to-noise ratio, Realize the effect of measurement

Inactive Publication Date: 2018-11-30
TIANJIN UNIV
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Problems solved by technology

[0004] The invention provides a spectrum detection method based on digital projection. The invention overcomes the fact that the spectra obtained by traditional spectrometers cannot have high resolution at the same time by adding an entrance with a gradient width before the spectrum detection system and supporting data processing means in the later stage. and high signal-to-noise ratio, see the description below:

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  • A Spectral Detection Method Based on Digital Projection
  • A Spectral Detection Method Based on Digital Projection
  • A Spectral Detection Method Based on Digital Projection

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Embodiment 1

[0038] A kind of spectral detection method based on digital projection technology, see figure 1 , the spectral detection method mainly includes the following steps:

[0039] 101: According to the pixel size of the spectrometer photodetector (CCD) or single-point detector (hereinafter, CCD is taken as an example), design an entrance with a gradient width, so that the incident light spot is finally projected on the CCD in a gradient;

[0040] 102: According to the number of horizontal projection pixels from less to more, a set of spectral images with resolution from high to low can be extracted from it;

[0041] Among them, the spectral resolution is the best when the projections are all concentrated on one pixel on the CCD, and the spectral resolution is poorer as the number of projected pixels increases.

[0042] 103: Input the spectrograms with different resolutions into the digital projection algorithm, and perform iterative calculations until the results converge;

[0043...

Embodiment 2

[0051] Combine below Figure 2 to Figure 6 , and specific examples to further introduce the scheme in embodiment 1, see the following description for details:

[0052] The embodiment of the present invention proposes a spectral detection method based on digital projection, and designs an entrance with a gradient width to collect spectral images with high information content, and cooperates with later data processing methods to restore spectral images with high resolution and Spectra with high signal-to-noise ratio. The spectral detection method can be divided into two parts: entrance and detection. The entrance part 1 is the focus of the design of the embodiment of the present invention.

[0053]There are two options for the entrance part 1 , which are optical fiber type and slit type, and the slit type can be divided into fixed type and adjustable type. The detection part can match the detection part of other existing spectrum detection instruments. Generally, the grating i...

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Abstract

The invention discloses a spectrum detection method based on digital projection. The method comprises that according to the pixel size of a photoelectric or single-point detector of a spectrometer, an inlet part whose width is in gradient change is designed, so that an incident light spot is projected on the photoelectric or single-point detector of the spectrometer in a gradient manner; a group of spectrograms whose resolutions are decreased is extracted with increase of horizontal projection pixel points; the spectrograms of different resolutions are input to a digital projection algorithm, and iterative computation is carried out till a result is converged; a convergence result can be restored to a spectrum of the optimal resolution, namely, the spectrum in which projection is all concentrated in a last pixel of the photoelectric or single-point detector of the spectrometer. According to the invention, an inlet whose width is in gradient change is added to the spectrum detection system, post matched data processing means is provided, and the problem that a spectrum obtained by a traditional spectrometer cannot be high in resolution and signal to noise ratio simultaneously is overcome.

Description

technical field [0001] The invention relates to the technical field of spectrum detection, in particular to a digital projection-based spectrum detection method. Background technique [0002] The spectrum is a pattern in which the dispersed monochromatic light is arranged sequentially according to the wavelength (or frequency) after the polychromatic light is split by the dispersion system. The light waves are generated by the electrons moving inside the atoms, and the electrons in the atoms of various substances move differently, so the light waves they emit are also different. Therefore, it is of great theoretical and practical significance to study the luminescence and light absorption of different substances. [0003] At present, the spectral detection technology is relatively simple, and its structure mainly uses rectangular slits, and the resolution and signal-to-noise ratio of the spectrum are controlled by adjusting the width of the rectangular slits. The shape of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J3/28G01J3/02
CPCG01J3/0208G01J3/0216G01J3/2803G01J2003/282G01J2003/2843
Inventor 李奇峰马翔云王慧捷王洋杜建宾
Owner TIANJIN UNIV