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Single exposure high numerical aperture pulsed laser coherent diffraction imaging device and method of use

A technology of coherent diffraction imaging and high numerical aperture, applied in the field of laser coherent diffraction imaging, can solve problems such as difficulties in three-dimensional imaging, achieve the effects of ensuring luminous flux, improving accuracy, and simplifying the optical path

Active Publication Date: 2019-12-06
SHANDONG JIANZHU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Single-exposure 3D imaging is still the common goal pursued by many imaging methods, and there are still certain difficulties in obtaining single-exposure 3D imaging for these imaging methods

Method used

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  • Single exposure high numerical aperture pulsed laser coherent diffraction imaging device and method of use
  • Single exposure high numerical aperture pulsed laser coherent diffraction imaging device and method of use
  • Single exposure high numerical aperture pulsed laser coherent diffraction imaging device and method of use

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Embodiment 1

[0038] This embodiment discloses a single exposure high numerical aperture pulsed laser coherent diffraction imaging device, such as figure 1 mentioned.

[0039] A pulsed laser 1, an attenuator 2, a polarizer 3, a lens 4, a diaphragm 5, a sample stage 6, a reflector group 7, a perforated reflector 8, and a beam collector 9 are arranged coaxially in sequence along the beam advancing direction; Lens 10 liquid nitrogen cooling CCD image sensor 11 is provided with lens 10 liquid nitrogen cooling CCD image sensor 11 successively in the reflected beam advancing direction of mirror group 7; The CCD image sensors 12 are all connected to a computer 13 .

[0040]Wherein, the reflective mirror group 7 and the perforated reflector 8 are all arranged on the step frame capable of moving left and right, up and down, and forward and backward; On the optical bench, two CCDs are respectively fixed on two stepping frames that are perpendicular to each other and can move left and right and up a...

Embodiment 2

[0045] According to the device in Embodiment 1, this embodiment provides a method for using the device.

[0046] A method for using a single exposure high numerical aperture pulsed laser coherent diffraction imaging device, the steps are:

[0047] Step 1: Turn on the pulsed laser, use the CCD to collect signals, and adjust the position of each device in the optical path so that the pulsed laser passes through the optical path;

[0048] Specifically, adjust the direction of the polarizer 3 so that the laser polarization plane is in the vertical direction; adjust the distance between the four plane mirrors in the mirror group 7, and adjust the mirror group 7 in the vertical direction of the optical path to allow the direct pulsed laser to pass; the vertical direction of the optical path Adjust the mirror 8 with a hole to make the pulsed laser pass through the circular hole; adjust the beam collector vertically to the direction of the optical path so that the pulsed laser enters ...

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Abstract

The invention discloses a single exposure high numerical aperture pulse laser coherent diffractive imaging apparatus and method. The apparatus herein includes a pulse laser 1, an attenuation sheet 2,a polarizer 3, a first lens 4, a diaphragm 5, a sample bench 6, a reflector group 7, a reflector 8 with a hole therein, a light beam collector 9 which are successively and coaxially disposed in the progressing direction of a light beam. The apparatus is provided with a second lens 10, and a liquid nitrogen cooling CCD image sensor 11 which are successively disposed in the progressing direction ofa reflection light beam of the reflector group 7. The reflector 8 with the hole therein is provided with a common CCD image sensor 12 in the progressing direction of the reflection light beam. The liquid nitrogen cooling CCD image sensor 11 and the common CCD image sensor 12 are both in connection to a computer 13. According to the invention, the apparatus herein can simultaneously acquire high angles and central diffraction light spots, and increases 3D reconstruction precision.

Description

technical field [0001] The invention belongs to the field of laser coherent diffraction imaging, in particular to a single-exposure high numerical aperture pulsed laser coherent diffraction imaging device and a use method. Background technique [0002] Coherent diffraction imaging uses advanced light sources, such as synchrotron radiation light sources, high-order harmonic light sources, X-ray lasers, free electron lasers, and visible light lasers, combined with phase recovery algorithms, to reversely calculate the diffraction image into a structural image of the sample. Its advantage is that imaging samples do not require calibration, and can be quantified and have high resolution. At present, this imaging method has realized two-dimensional and three-dimensional imaging of various nanomaterials and biological cells. [0003] Three-dimensional imaging plays an important role in understanding the relationship between the structure and function of materials and biological ti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/42
CPCG02B27/4205G02B27/4261
Inventor 张剑周成壮李小龙吴大同
Owner SHANDONG JIANZHU UNIV
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