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Four-dimensional ultra-fast photographing device

A photographic device, ultra-fast technology, used in measuring devices, optical radiometry, instruments, etc.

Active Publication Date: 2020-02-11
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, spectral imaging techniques, such as classical Hyperspectral Imaging (HSI) and Coded Aperture Snapshot Spectral Imager (CASSI), can only obtain spatial and spectral information of objects
Therefore, there is no optical imaging technique that can simultaneously record a 4D scene with spatial x-y, temporal t and spectral λ information of an object in a single shot

Method used

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  • Four-dimensional ultra-fast photographing device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] refer to figure 1 , in the present embodiment, digital delay pulse generator 32 selects DG645 digital delay pulse generator for use; Streak camera 18 selects CMOS industrial camera for use; The scale of grating 17 is 300lp / mm;

[0047] The data acquisition system 1 works, first selects the dynamic scene 11 to be measured, and the dynamic image enters the focusable lens 12, the beam splitter cube 13, the first lens 14, and the second lens 15 to reach the digital micromirror device 16, and the digital micromirror The device 16 performs a pseudo-random encoding, and the encoded image is reflected by the small unit on the digital micromirror device 16 back to the original 4f system and then back to the beam splitter cube 13, and then reflected into the grating 17 after beam splitting by the beam splitter cube 13 , the spectral offset is performed by the grating 17, and finally enters the streak camera 18 for time offset and compression.

[0048] The data reconstruction sys...

Embodiment 2

[0051] refer to figure 1 , figure 2 , the selected dynamic scene 11 to be tested is a chirped picosecond pulse signal, and the whole single pulse signal is captured by the present invention.

[0052] When the data acquisition system 1 works, the dynamic scene 11 to be measured is first selected as a chirped picosecond pulse signal, and the dynamic image enters the adjustable focus lens 12, the beam splitter cube 13, the first lens 14, and the second lens 15 to reach the digital microscope. Mirror device 16, a pseudo-random encoding is carried out by digital micromirror device 16, and the encoded image is reflected back to the original 4f system by the small unit on digital micromirror device 16 and returns to beam splitter cube 13 again, through beam splitter cube 13 After beam splitting, the reflection enters the grating 17, and the spectrum shift is performed by the grating 17, and finally enters the streak camera 18 for time shifting and compression.

[0053] The data reco...

Embodiment 3

[0056] refer to figure 1 , image 3 , the selected dynamic scene 11 to be tested is a dynamic process of fluorescence decay generated by using 50 fs laser pulses in Rhodamine B solution, and the dynamic process of the entire fluorescence decay is photographed by the present invention.

[0057] When the data acquisition system 1 works, the dynamic scene 11 to be tested is first selected as a dynamic process in which the laser pulse of 50 fs is used to hit the rhodamine B solution to produce its fluorescence decay, and the dynamic image enters the adjustable focus lens 12 and the beam splitter cube 13 in turn. , the first lens 14 and the second lens 15 arrive at the digital micromirror device 16, and a pseudo-random encoding is carried out by the digital micromirror device 16, and the encoded image is reflected back to the original 4f system by the small unit on the digital micromirror device 16 Returning to the beam splitting cube 13 again, the beam is split by the beam splitt...

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Abstract

The invention discloses a four-dimensional ultra-fast photographing device comprising a data acquisition system, a data reconstruction system and a synchronization system. The invention acquires an integral image, which is the image after compressing the entire ultra-fast dynamic process, from a dynamic scene to be measured through the data acquisition system, the data reconstruction system processes the image from the data acquisition system, that is, denoising and the augmented Lagrangian algorithm are used to reconstruct the dynamic scene to be measured, and images recording four-dimensional scenes of the space x-y, time t and spectrum lambda of the object are finally obtained. The invention uses a synchronization system to control the working time of the fringe camera, enables a breakthrough and expansion of the existing optical imaging technology and realizes the measurement of four-dimensional dynamic scenes, and has certain application value in fluorescence measurement and diagnosis of biological tissues.

Description

technical field [0001] The invention relates to the technical field of optics and computer imaging, including two parts of data collection in the early stage and data reconstruction in the later stage, so as to obtain a four-dimensional space scene containing spectral dynamic information, especially a four-dimensional ultrafast photography device. In addition, the scanning speed of the streak camera determines that the device has certain applications in some ultrafast optical imaging and medical biological tissue diagnosis. Background technique [0002] In scientific research, it is very important to obtain the spatial structure, temporal evolution and spectral composition of objects. It can help humans better understand natural phenomena such as biomedical optics, environmental remote sensing, nuclear explosions, and astrophysics. Optical imaging technology, as a direct observation method, provides a powerful tool for exploring the mysterious nature of human history and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J3/28
CPCG01J3/2823G01J3/2889
Inventor 丁鹏鹏曹烽燕杨承帅齐大龙何一林姚佳丽姚云华金诚挚张诗按
Owner EAST CHINA NORMAL UNIV
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