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Polychromatic light illumination three-dimensional particle imaging system and method

A technology of particle imaging and subsystems, applied in image enhancement, image analysis, image data processing, etc., can solve the problems of inability to identify particles from the background, coherent noise, etc., and achieve reduced implementation difficulty, high signal-to-noise ratio, and high precision The effect of particle coordinates

Active Publication Date: 2021-07-23
INST OF FLUID PHYSICS CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is that the existing holographic imaging technology is subject to the influence of laser coherence and multiple reflections of optical path components, and coherent noise will be introduced into the image. When the intensity is comparable to that of particles, it is impossible to identify particles from the background.

Method used

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  • Polychromatic light illumination three-dimensional particle imaging system and method
  • Polychromatic light illumination three-dimensional particle imaging system and method
  • Polychromatic light illumination three-dimensional particle imaging system and method

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Embodiment 1

[0062] Such as figure 1 As shown, the present invention is a three-dimensional particle imaging system illuminated by polychromatic light, which includes: an illumination module, an optical imaging subsystem, an image recording subsystem, and a particle image reconstruction subsystem; the image reconstruction subsystem is connected to the An image recording subsystem, the image reconstruction subsystem is connected to the lighting module through a control line; wherein, the image reconstruction subsystem is implemented by a computer, that is, the image reconstruction subsystem runs on the computer.

[0063] The lighting module is used to generate a multicolor lighting source, trigger the multicolor lighting source through the particle image reconstruction subsystem, and the multicolor lighting source outputs multicolor light of different wavelengths (multicolor light includes coherent light, partially coherent light and fiber laser, etc.) Illuminate the area of ​​the sample to...

Embodiment 2

[0083] Such as Figure 4 , Figure 5 As shown, the difference between this embodiment and Embodiment 1 is that this embodiment is based on a polychromatic light illumination three-dimensional particle imaging system in Embodiment 1 to measure coal mine dust, and the measurement process is as follows:

[0084] (1) Trigger multi-color illumination sources, different wavelengths of light illuminate the area to be measured at different angles, and the target information is transmitted to the image recording subsystem through the optical imaging subsystem; (2) Diffraction reconstruction is performed on each wavelength image. The three-dimensional tomographic image is obtained from the wavelength image, and finally the particle image is obtained by image processing the tomographic image.

[0085] The measurement results are as follows: Figure 4 In order to adopt the image of coal mine dust settled on the glass surface recorded by the present invention, the annular structure in th...

Embodiment 3

[0088] Such as image 3 As shown, the difference between this embodiment and Embodiment 1 is that this embodiment also provides a polychromatic light illumination three-dimensional particle imaging method, which is applied to the polychromatic light illumination three-dimensional particle imaging system described in Embodiment 1, The method includes the following steps:

[0089] S1, image recording: use the polychromatic light of the illumination module to illuminate the particle field to be detected, obtain the target scattered light field, and transmit it to the optical imaging subsystem; the optical imaging subsystem receives the scattered light field for optical imaging or optical information processing to obtain particles Each wavelength image of each wavelength image, and the processed each wavelength image is transmitted to the image recording subsystem, and multi-wavelength images are recorded through multiple CCD cameras; the polychromatic light includes coherent ligh...

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Abstract

The invention discloses a polychromatic light illumination three-dimensional particle imaging system and method. The system comprises an illumination module, a sample to be detected, an optical imaging subsystem, an image recording subsystem and a particle image reconstruction subsystem; according to the invention, a to-be-detected particle field is illuminated by using polychromatic light of an illumination module to obtain a target scattered light field, and the target scattered light field is transmitted to an optical imaging subsystem; the optical imaging subsystem receives the scattered light field to perform optical imaging or optical information processing to obtain each wavelength image of the particles, and transmits each processed wavelength image to the image recording subsystem, and a plurality of CCD cameras record a multi-wavelength image; the invention also includes performing diffraction reconstruction on each wavelength image to obtain a multi-wavelength reconstructed image; and obtaining a three-dimensional tomographic image by fusing the multi-wavelength reconstructed image, and performing image processing on the three-dimensional tomographic image to obtain a three-dimensional particle image. The invention provides a high-precision particle coordinate, high signal-to-noise ratio and high-contrast reconstructed image, and can adapt to dust and particle detection in a complex environment.

Description

technical field [0001] The invention relates to the technical field of three-dimensional particle field characterization, in particular to a three-dimensional particle imaging system and method illuminated by polychromatic light. Background technique [0002] Using 3D imaging technology to obtain the 3D coordinates, shape, and velocity of particles is an important content of particle dynamics research in impact dynamics, turbulence, ocean, biology, atmosphere and other related fields. According to related reports, in current related research, holographic technology is mainly used to obtain three-dimensional particle information. [0003] Holographic imaging technology has the capability of three-dimensional reproduction, and can give the three-dimensional spatial distribution and particle size distribution of particles. It has obvious advantages in the characterization of particle field information (including particle number, spatial distribution, and particle size), and has...

Claims

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Application Information

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IPC IPC(8): G06T15/06G06T5/00G06T7/00
CPCG06T15/06G06T7/0002G06T2207/20104G06T5/70
Inventor 李生福赵宇朱瑜周平伟蒙建华刘振清叶雁
Owner INST OF FLUID PHYSICS CHINA ACAD OF ENG PHYSICS
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