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Method and device for generating tightly-focused light spots of column polarized vector beam

A production method and a production device technology, applied in the direction of optics, optical components, microscopes, etc., to achieve the effect of easy realization, simple structure of the device, and easy adjustment

Inactive Publication Date: 2013-03-13
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it should be noted that when using this method to rotate particles, when the rotation speed needs to be adjusted, a large adjustment must be made to the optical path

Method used

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  • Method and device for generating tightly-focused light spots of column polarized vector beam
  • Method and device for generating tightly-focused light spots of column polarized vector beam
  • Method and device for generating tightly-focused light spots of column polarized vector beam

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Embodiment 1: Generation method of arbitrarily rotatable four-tight focus spot array

[0067] (1) The expression of the incident cylindrically polarized vector beam is:

[0068] E → 1 ( r , φ , 0 ) = exp ( - r 2 w 0 2 ) ( 2 r 2 w 0 2 ) ( n + 1 ) / ...

Embodiment 2

[0092] Embodiment 2: Method for generating arbitrarily rotatable array of six tightly focused spots

[0093] (1) The expression of the incident cylindrically polarized vector beam is:

[0094] E → 1 ( r , φ , 0 ) = exp ( - r 2 w 0 2 ) ( 2 r 2 w 0 2 ) ( n + 1 ) / ...

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PUM

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Abstract

The invention discloses a method and device for generating a tightly-focused light spot array of a column polarized vector beam which can be rotated freely. Based on the generation of a column polarized vector beam in the prior art, the polarized direction of the column polarized vector beam is rotated in a way that the beam passes through two half wave plates. Finally, the beam is tightly focused through a microscope objective with a high numerical aperture to obtain array-type focused light spots. Through rotating the second half wave plate, the rotation speed of the focused light spot array is easily controlled. The method provided by the invention is easy to realize, the device provided by the invention has the advantages of simple structure, adjustment easiness and low manufacturing cost. Moreover, the device has good stability and does not need other special optical elements.

Description

technical field [0001] The invention relates to a method for generating a tightly focused spot array of a cylindrically polarized vector beam, in particular to a method and a device for generating a dynamic, real-time, arbitrarily rotatable tightly focused spot array of a cylindrically polarized vector beam. Background technique [0002] Laser optical tweezers is a technology that uses laser as a technical means to capture, manipulate and control tiny particles. It is an emerging frontier subject, and it is also an interdisciplinary subject that combines physics, biology and medicine. Because optical tweezers have minimal interference with the life activities of biological particles, the cell living environment involved in the entire control system is almost equivalent to the "natural" environment, which can completely preserve the changes in the life activities of biological particles and achieve sterility, no damage, real-time dynamic At the same time, the optical tweezers...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B21/32G02B27/28
Inventor 董一鸣王飞刘显龙蔡阳健
Owner SUZHOU UNIV
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