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A Wide-Field 3D Imaging Method Through Scattering Media

A three-dimensional imaging and medium technology, applied in the field of optical imaging, can solve the problems of limited application scope, low field reconstruction, and long reconstruction time, and achieve the effect of simple optical path and high robustness

Active Publication Date: 2021-07-09
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the field reconstruction degree of the existing methods is low, and the reconstruction takes a long time, which is not conducive to fast imaging; at the same time, most of the existing methods can only achieve simple binary target imaging, and cannot be applied to complex wide-field target imaging. limited scope of application

Method used

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  • A Wide-Field 3D Imaging Method Through Scattering Media
  • A Wide-Field 3D Imaging Method Through Scattering Media
  • A Wide-Field 3D Imaging Method Through Scattering Media

Examples

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Embodiment 1

[0055] See figure 1 , figure 1 It is a schematic flowchart of a wide-field three-dimensional imaging method through a scattering medium provided by an embodiment of the present invention, including:

[0056] Step 1: Build a target 3D imaging system through the scattering medium;

[0057] In this embodiment, building a target 3D imaging system through a scattering medium includes:

[0058] Build a light source module; the light source module includes a coherent light source, an attenuation sheet, and a beam expander;

[0059] Build the target and scattering medium;

[0060] Build detector module; Described detector module comprises detector and displacement platform; Wherein,

[0061] The light source module, the target, the scattering medium and the detector module are along the same optical axis.

[0062] See figure 2 , figure 2 It is a schematic structural diagram of a 3D imaging system for a target through a scattering medium provided by an embodiment of the presen...

Embodiment 2

[0107] The method of the present invention will be further described through simulation experiments below.

[0108] Simulation experiment one

[0109] See image 3 , image 3 is the simulation diagram of the round-trip diffraction transmission field reconstruction technology provided by the embodiment of the present invention, wherein, image 3 (a), (b) in represent the amplitude and phase part of the input field, image 3 (c), (d) in (c) and (d) represent the field amplitude and phase parts recovered by the round-trip diffractive transmission field reconstruction technique. In order to verify that the field reconstruction algorithm can be used in the optical path containing scattering media, the phase part of the input field is replaced with a random phase, image 3 (e) and (f) of the figure represent the amplitude and phase part of the input field when there is a scattering medium, image 3(g) and (h) in (g) and (h) represent the scattered field amplitude and phase part...

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Abstract

The invention discloses a wide-field three-dimensional imaging method through a scattering medium, comprising: building a target 3D imaging system through a scattering medium; obtaining a first speckle image and a second speckle image according to the target 3D imaging system; The first target light field is obtained according to the first speckle image, and the first background light field is obtained according to the second speckle image; the second target light field is obtained according to the first target light field and the first background light field. A target light field: obtaining a reconstructed three-dimensional light field according to the second target light field. The wide-field three-dimensional imaging method through the scattering medium provided by the present invention can efficiently reconstruct the three-dimensional light field on the front surface of the scattering medium, and is not limited by the optical memory effect. High robustness, flexibility and precision.

Description

technical field [0001] The invention belongs to the technical field of optical imaging, and in particular relates to a wide-field three-dimensional imaging method through a scattering medium. Background technique [0002] With the advancement of science and technology, optical imaging technology has also been developed rapidly. In optical imaging, due to the uneven distribution of refractive index inside the medium (such as biological tissues, clouds, etc.) or on the surface (such as frosted glass, rough walls, etc.), light waves will appear to different degrees when transmitting through the medium or interacting with its surface. The traditional optical imaging system can only receive the speckle formed by the interference between the scattered light, and cannot obtain the target information hidden behind the scattering medium through direct observation. The three-dimensional imaging technology through the scattering medium breaks through the traditional optical imaging pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/47G01N21/41
CPCG01N21/41G01N21/47
Inventor 刘杰涛李伟吴雨祥邵晓鹏何顺福朱进进
Owner XIDIAN UNIV
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