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A device and method for cleaning materials based on the principle of holographic optical tweezers

A technology of optical tweezers and holography, applied in cleaning methods and utensils, chemical instruments and methods, optics, etc., can solve problems such as non-destructive cleaning of special materials, and achieve the effect of quickly cleaning sundries

Inactive Publication Date: 2016-03-02
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the problem that the current general method can only clean common materials but not non-destructive cleaning of special materials, the present invention provides a cleaning device and method that can realize no pollution to materials, no damage and short cleaning time

Method used

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  • A device and method for cleaning materials based on the principle of holographic optical tweezers
  • A device and method for cleaning materials based on the principle of holographic optical tweezers
  • A device and method for cleaning materials based on the principle of holographic optical tweezers

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Embodiment Construction

[0026] For Mie scattering particles with a diameter larger than the wavelength, the generation of trapping forces can be analyzed by light refraction and conservation of momentum. If the gradient force and scattering force can be balanced, the stable capture of particles can be achieved, which forms the potential well of optical tweezers. The following are quantitative expressions for these forces given by Ashkin:

[0027] Scattering power: F s = np c { 1 + R cos 2 a - T 2 [ cos ( 2 a - 2 b ) + R cos 2 a ...

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Abstract

The invention discloses a material cleaning device and method based on the holographic optical tweezer principle. The material cleaning method is suitable for cleaning precious materials quite small in size. A holographic optical tweezer system is built by an SLM and a fluorescence inverted microscope to capture and control particles. The material cleaning method specifically includes the steps of firstly, building the holographic optical tweezer system, wherein the holographic optical tweezer system can capture and control the particles; secondly, emitting a shaped light beam into the microscope through the SLM, and enabling the focal plane of the light beam to be located on the upper plane of the material surface by adjusting a telescoping system and a fine adjustment knob of the microscope; finally, adjusting the power of a laser device to be larger, so that it can be observed that the particles attached to the material surface are controlled by the light beam and float to the focal plane, and removing the impurity particles by cleaning the focal plane with pure water. The material cleaning device and method are easy to operate and implement, and have the wide application prospects in the fields of cleaning chemical materials and medical materials without damage and pollution and the like.

Description

technical field [0001] The invention relates to a device and method for cleaning materials based on the principle of holographic optical tweezers. Background technique [0002] In recent years, the application fields of optical tweezers technology have become more and more extensive, such as capturing, sorting, manipulating, bending the cytoskeleton, overcoming the bacterial rotational force caused by molecular motor force, measuring the force of motor protein, researching Mechanism of dynein movement, inelastic tensile strain of DNA molecules, and quantitative research on membrane systems, etc. [0003] Optical tweezers use lasers to capture and manipulate particles, and there is no mechanical contact with the sample, which will not cause mechanical damage to the sample; it will not pollute and interfere with the surrounding environment of the sample, reducing the uncertain factors in the detection. The particle size that optical tweezers can capture and manipulate is abou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B08B7/00G02B21/32
CPCB08B7/0042G02B21/32
Inventor 罗伟陶少华杨兵初
Owner CENT SOUTH UNIV