Sub-wavelength super-resolution digital holographic imaging system based on microspheres

A super-resolution, digital holography technology, applied in instruments and other directions, can solve the problems of unable to reflect three-dimensional topography information, unable to detect the axial information of objects, etc., to achieve the effect of low price, low cost and simple system structure

Active Publication Date: 2014-05-28
BEIJING UNIV OF TECH
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Problems solved by technology

However, Wang and Hao et al. have combined microsphere superlenses with ordinary optical microscopes to obtain sub-wavelength lateral resolutio...

Method used

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  • Sub-wavelength super-resolution digital holographic imaging system based on microspheres
  • Sub-wavelength super-resolution digital holographic imaging system based on microspheres
  • Sub-wavelength super-resolution digital holographic imaging system based on microspheres

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Embodiment Construction

[0025] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0026] Such as figure 1 As shown, the present invention includes a hologram automatic acquisition control module, a digital hologram recording module, a digital hologram preprocessing module, a hologram numerical analysis and processing module, a phase contrast image display module, and the sample to be tested in the hologram recording module Preliminary bead placement18 is required. Among them, the hologram automatic acquisition control module controls the digital hologram recording module to regularly record the hologram of the sample to be tested, and collects the hologram data information; the digital hologram preprocessing module performs apodization filtering on the hologram data information to reduce the edge diffraction effect, Improve the image signal-to-noise ratio; the hologram numerical analysis and processing module performs num...

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Abstract

The invention relates to a sub-wavelength super-resolution digital holographic imaging system based on microspheres. The sub-wavelength super-resolution digital holographic imaging system based on microspheres comprises an automatic hologram collecting and controlling module, a digital hologram recording module, a digital hologram preprocessing module, a hologram numerical value analyzing and processing module and a phase contrast image displaying module, wherein the exposure time and the image collecting speed are controlled by utilizing Labview software through the automatic hologram collecting and controlling module; the digital hologram recording module comprises a laser device, a to-be-tested sample and an optical device for forming a hologram, and the to-be-tested sample performs microsphere spreading at the early stage; acetone or water can be used for diluting microspheres; a small amount of diluted microsphere solution is dropped onto the to-be-tested sample by a drip tube, and stands until acetone or water is volatilized completely so as to complete the single-layer spreading of the microspheres. According to the invention, micro fine structures are amplified twice by adopting the microspheres and a microobjective, so that the micro nano structure can be subjected three-dimensional phase contrast imaging; the horizontal resolution can break through the diffraction limit, and the system is simple in structure, and is low in cost.

Description

technical field [0001] The sub-wavelength super-resolution digital holographic imaging system based on microspheres belongs to the field of high-resolution imaging and digital holography technology, and relates to a super-resolution digital holographic imaging device, especially a sub-wavelength superresolution system based on microspheres to collect near-field evanescent waves. High resolution digital holographic imaging device. Background technique [0002] With the rapid development of nanoscience and microelectronics technology, micro-processing technology and micro-nano components have been widely used. In order to quantitatively detect and evaluate micro-structures, there is an urgent need for high-precision micro-nano structure detection technology. Compared with traditional optical imaging methods, digital holographic microscopic imaging has the unique advantages of full field of view, non-contact, non-destructive and quantitative detection, and is a promising micros...

Claims

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Application Information

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IPC IPC(8): G03H1/12G03H1/22
Inventor 王云新王大勇戎路江竹青万玉红
Owner BEIJING UNIV OF TECH
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