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Space framing device, all-optical ultrafast imaging system and all-optical ultrafast imaging method

A space and imaging technology, which is applied in the direction of measuring devices, optical devices, instruments, etc., can solve the problems of different spatial resolutions of each frame of images, the difficulty of increasing the number of imaging frames, and the difficulty of processing, so as to increase the number of imaging frames and cost Low cost, simple processing and production

Active Publication Date: 2021-06-04
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a spatial framing device, a plenoptic ultrafast imaging system and a method to solve the problem that the number of imaging frames of the device or system for plenoptic ultrafast imaging in the prior art is difficult to increase, and the spatial resolution of each frame of image is different. And the problem of high processing difficulty and high cost

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  • Space framing device, all-optical ultrafast imaging system and all-optical ultrafast imaging method
  • Space framing device, all-optical ultrafast imaging system and all-optical ultrafast imaging method
  • Space framing device, all-optical ultrafast imaging system and all-optical ultrafast imaging method

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Experimental program
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Embodiment 1

[0031] Embodiment 1 provides a spatial framing device, including: a shear mirror array dispersion device, a first mirror, and a beam-splitting imaging microlens array.

[0032] The shear reflective array dispersion device is used to spatially disperse the incident light beams with different wavelengths to obtain multiple sub-beams distributed in a two-dimensional array separated in space; the first reflector is used to divide the two-dimensional The multiple sub-beams distributed in the array are reflected to the beam-splitting imaging microlens array; the beam-splitting imaging micro-lens array is used to respectively focus the multiple sub-beams distributed in the two-dimensional array.

[0033] Specifically, the shearing reflective array dispersion device includes: a dispersion grating, a first lens, and a two-dimensional spectral shearing mirror array. The dispersion grating, the first lens, and the two-dimensional spectral shearing mirror array form a 4f system; the two-d...

Embodiment 2

[0038] Embodiment 2 provides a kind of plenoptic ultrafast imaging system, such as figure 2 As shown, it includes: an ultrashort pulse laser 101, a beam splitter 102, a pump delay optical path device 103, a time dispersion device 104, a focusing lens 105, a microscopic imaging device 107, the spatial framing device provided in Embodiment 1, and the imaging Receiver 111.

[0039] The ultrashort pulse laser 101 is used to generate ultrashort pulse laser.

[0040] The beam splitter 102 is used to split the ultrashort pulse laser to obtain a pump beam and a probe beam.

[0041] The pumping delay optical circuit device 103 is used for delaying the pumping beam to obtain a first beam; the first beam is incident on the observation object 106 .

[0042] The time dispersion device 104 is used to widen the pulse width of the probe beam, and make components with different frequencies in the probe beam generate different delays to obtain a second beam; the second beam is the same as th...

Embodiment 3

[0050] Embodiment 3 provides a more specific plenoptic ultrafast imaging system on the basis of embodiment 2, such as image 3 As shown, it includes: ultrashort pulse laser 201, beam splitter 202, second mirror 203, third mirror 204, fourth mirror 205, fifth mirror 206, dispersion glass rod 207, focusing lens 208, display Micro-objective lens 210, second lens 211, third lens 212, dispersion grating 213, first lens 214, two-dimensional spectrum shear mirror array 215, first mirror 216, beam splitting imaging microlens array 217, CCD high-speed camera 218.

[0051] That is, the pump delay optical path device includes the second reflector 203 , the third reflector 204 , the fourth reflector 205 , and the fifth reflector 206 arranged in sequence along the optical path. The second reflector 203, the third reflector 204, the fourth reflector 205, and the fifth reflector 206 are used to change the direction of the pumping beam so that the pumping beam excites all The observation ob...

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Abstract

The invention belongs to the technical field of all-optical ultrafast imaging, and discloses a space framing device, an all-optical ultrafast imaging system and an all-optical ultrafast imaging method. The space framing device comprises a shearing reflector array dispersion device, a first reflector and a beam splitting imaging microlens array. The all-optical ultrafast imaging system comprises an ultrashort pulse laser, a beam splitter, a pumping delay light path device, a time dispersion device, a focusing lens, a microscopic imaging device, the space framing device and an imaging receiving device. The problems that in the prior art, the number of imaging frames of a device or system for achieving all-optical ultrafast imaging is difficult to increase, the spatial resolution of each frame of image is different, the machining difficulty is large, and the cost is high are solved. According to the device or the imaging system, the number of imaging frames can be increased, the optical path difference between the frames can be eliminated, the defocusing phenomenon during multi-frame imaging can be avoided, each frame of image is ensured to be clearly imaged, the processing and manufacturing are simple, and the cost can be effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of plenoptic ultrafast imaging, and more specifically relates to a space framing device, a plenoptic ultrafast imaging system and a method. Background technique [0002] In recent years, the observation and essential discussion of the microscopic properties of materials and ultrafast phenomena generated during processing have become a research hotspot, such as real-time monitoring and regulation of film growth defects, lattice vibration, and the relationship between crystallization and amorphization. For ultrafast phenomena such as phase transition processes, the time scale is on the order of picoseconds or even femtoseconds. Ultrafast imaging technology is a key technology for processing and detecting ultrafast phenomena generated during material properties and processing. Therefore, technical indicators such as time resolution, spatial resolution, and number of imaging frames of ultrafast imaging are of gr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/24
CPCG01B11/24
Inventor 雷诚袁仙丹刘胜王度李中星
Owner WUHAN UNIV