Method and device for micro ball to rapidly achieve optical suspension

A technology of optical levitation and microspheres, which is applied in optics, nonlinear optics, instruments, etc., can solve the problems of long-term optical levitation of microspheres, high cost of optical levitation of microspheres, complicated process of optical levitation of microspheres, etc., and achieves easy Realize, increase speed, low-cost effect

Active Publication Date: 2015-07-08
CHINA THREE GORGES UNIV
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Problems solved by technology

The disadvantages of microsphere optical levitation in traditional air environment are: using piezoelectric ceramics and piezoelectric ceramic drivers, making microsphere substrates, connecting microspheres and microsphere substrates with piezoelectric ceramics, and making microspheres optically levitate. The process of spherical optical levitation is complicated, and the time-consuming of microsphere optical levitation is long

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  • Method and device for micro ball to rapidly achieve optical suspension
  • Method and device for micro ball to rapidly achieve optical suspension

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Embodiment Construction

[0024] refer to figure 1 As shown, a microsphere rapid optical levitation device includes a laser 1 , a lens 2 , a reflective prism 3 , a microsphere 4 , a sensing unit 5 , a microscope 8 , a light intensity modulator 9 , and a heater 10 .

[0025] The microspheres are micron-scale silica microspheres, and the silica microspheres are resistant to high temperatures.

[0026] The laser 1 can be a 980nm single-mode laser capable of outputting a fundamental-mode Gaussian beam.

[0027] The light intensity modulator 9 can use a single-mode variable fiber optical attenuator VOA980-APC from Thorlabs. The VOA980-APC can continuously attenuate the optical power of a 980nm single-mode laser.

[0028] The heater 10 can adopt the miniature air heater that China Hongchuang Electric Thermal Machinery Co., Ltd. produces, and the heating surface of the miniature air heater and the heating surface of the sensing unit 5 are closed, and the miniature air heater heats the air in the enclosed are...

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Abstract

The invention provides a method and device for a micro ball to rapidly achieve optical suspension. The device comprises a transparent sensing unit, a cavity is formed inside the sensing unit, the cavity is used for providing a space for the micro ball to achieve optical suspension, a first hole and a second hole are formed in the surface layer of the sensing unit, the first hole is used for providing a passage allowing the micro ball to enter the cavity, the second hole is used for providing a passage allowing the micro ball to be discharged out of the cavity, and a fundamental-mode gaussian beam is focused on the micro ball. The sensing unit is connected with a heater, and the heater is used for heating a micro ball solution in the cavity of the sensing unit. By the adoption of the method and device for the micro ball to rapidly achieve optical suspension, a micro ball optical suspension system is lighter, smaller and low in cost; optical suspension of the micro ball in a liquid environment is achieved more easily compared with optical suspension of the micro ball in an air environment, the liquid where the micro ball is located is completely evaporated by adopting a heating method, therefore, optical suspension of the micro ball in the liquid environment is converted into optical suspension in the air environment, and the speed of converting the non-suspensions state of the micro ball into the optical suspension state in the air environment is improved.

Description

technical field [0001] The invention relates to the fields of optical inertial navigation, optical engineering and microparticle suspension, in particular to a method and device for rapid optical suspension of microspheres. Background technique [0002] According to quantum theory, a light beam is a stream of photons moving at the speed of light with momentum. When the light beam is reflected and projected on the surface of the microsphere medium, the speed and direction of the photon change, resulting in the transformation of its momentum vector. According to the law of conservation of momentum, the momentum change of the photon is equal to the momentum change of the microsphere, so the light beam has light radiation pressure on the microsphere. The force of the fundamental mode Gaussian beam on the microsphere includes the scattering force along the propagation direction of the beam and the gradient force pointing to the stronger light intensity. When the microspheres i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/01
CPCG02F1/009G02F1/0147
Inventor 王飞邹红波饶超平
Owner CHINA THREE GORGES UNIV
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