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Tomographic imaging method based on aplanatic super-structured lens

A tomographic imaging and aplanatic technology, applied in the field of tomographic imaging, can solve problems such as spherical aberration that has not been solved, and achieve the effect of being suitable for large-scale production, low process complexity, and simple design

Active Publication Date: 2019-05-14
NANJING UNIV
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Problems solved by technology

Regarding the chromatic aberration of the metalens, various international research groups are devoted to the research of achromatic aberration, but there is little mention of how to effectively use the chromatic aberration
And the problem of spherical aberration in the microscopic imaging process of the metalens has not been solved before here

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  • Tomographic imaging method based on aplanatic super-structured lens
  • Tomographic imaging method based on aplanatic super-structured lens
  • Tomographic imaging method based on aplanatic super-structured lens

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Embodiment Construction

[0047] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the scope of protection of the present invention is not limited to the following examples, and should include the entire content of the claims.

[0048] figure 1Shown is an example of the chromatic aberration performance of an ordinary glass lens (BK7) and a metalens (based on the geometric phase principle) with the same numerical aperture (NA=0.2175). (a) The picture shows the BK7 glass lens, and (b) the picture shows the metalens. Both of them are designed with a focal length of 0.108mm when the wavelength is 532nm. The scale bar in the picture is 10um. According to the results of ray tracing, in the visible light range of 400nm-760nm, the focal length change of the metalens is 17 times that of the glass lens, that is, the dispersion effect of the metalens is more than an order of magnitude that of ordinary glass.

[0049] According to the...

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Abstract

The invention discloses a tomographic imaging method based on an aplanatic super-structured lens, namely a chromatographic imaging technology utilizing wavelength coding based on a super-structured aplanatic lens. A light source probe (1), the aplanatic super-structured lens (2), a linear polarizer (3) and a quarter-wave plate can be taken as auxiliary optical elements to be inserted into an imaging system for directly improving a signal-to-noise ratio; a photoreceptor (5) is arranged on the imaging surface and is used for receiving an image; through relatively continuous irradiation of different wavelengths, the image surface information of wavelength coding is acquired, and then the tomographic image information of an object is obtained through a corresponding algorithm. According to themethod, a design principle of a super-structure surface is adopted, and the control of the color difference and the correction of the spherical aberration are realized by utilizing the phase.

Description

technical field [0001] The invention belongs to the technical field of tomography, and relates to a new method of a large chromatic aberration metalens based on ultra-thin volume aplanatic aberration. Background technique [0002] Tomography plays an indispensable role in biomedical research. Tomography is a technical means to obtain the tomographic information of organisms and observe their internal three-dimensional structures. The current mainstream tomographic imaging techniques include X-ray computed tomography, nuclear magnetic resonance imaging, ultrasonic tomography, optical projection tomography, laser scanning confocal microscopy, optical coherence tomography, and single photon emission tomography. and positron emission tomography. [0003] Among them, compared with other types of tomography, optical tomography has the advantages of less interference to tissues, high resolution level, and real-time imaging in vitro or in vivo. Optical projection tomography is ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/00G02B3/00G01N21/17G01N21/01
Inventor 李涛陈晨祝世宁
Owner NANJING UNIV
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