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A Design Method of Vortex Array Mask with Abnormal Ring Connection

A ring-shaped connection and mask technology, applied in optical components, instruments, optics, etc., can solve problems such as lack, and achieve the effect of important application prospects

Active Publication Date: 2022-02-18
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] To sum up, in the field of particle manipulation, there is still a lack of an anomalous ring-connected vortex array beam with controllable local vortex distribution on the halo and a constant total number of vortices that can be used for particle manipulation. field, especially the need for simultaneous capture of particles of different sizes

Method used

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  • A Design Method of Vortex Array Mask with Abnormal Ring Connection
  • A Design Method of Vortex Array Mask with Abnormal Ring Connection
  • A Design Method of Vortex Array Mask with Abnormal Ring Connection

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Embodiment

[0031] Taking a mask with a size of 512×512 as an example, an abnormal ring-connected vortex array with controllable local vortex distribution and a constant total number of vortices on the halo is given for a laser with a working wavelength of 532 nm. The cone angle factor of the mask template axicon lens is respectively taken as α a = 0.07rad and α b =0.08rad, the local topological charge parameters of the reconstructed helical phase factor are chosen as m a1 Take 1 as the interval from 4 to 1, m a2 Take 1 as the interval from 4 to 7, m b1 = m b2 =-4, according to the transmittance function of the mask in the specific embodiment, an abnormal ring-connected vortex array mask with controllable local vortex distribution on the halo and a constant total number of vortices is finally obtained. figure 1 The masks generated under the different values ​​of local topological charge parameters are given. The anomalous ring-connected vortex array mask with controllable local vortex ...

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Abstract

A method for designing an anomalous ring-connected vortex array mask, combining two reconstructed spiral phase factors and two complex transmittance functions of axicon lenses to obtain the complex transmittance of the anomalous ring-connected vortex array mask function, by loading the above-mentioned complex amplitude transmittance function into the spatial light modulator through a computer, the required anomalous ring-connected vortex array with controllable local vortex distribution on the halo and a constant total number of vortices can be generated. mask board. And using the mask to generate anomalous ring-connected vortex arrays with controllable vortex distribution on the halo and constant total number of vortices, to meet the needs of particle manipulation, especially the simultaneous capture of particles of different sizes.

Description

technical field [0001] The invention relates to the field of particle manipulation, in particular to a design method of an abnormal ring-connected vortex array mask. Background technique [0002] Because the optical vortex carries orbital angular momentum, it has a wide range of applications in particle trapping and optical tweezers. Therefore, it has become an important research hotspot in the field of optics and has attracted extensive attention of researchers. The vortex array, because it carries multiple vortices, provides an additional control degree of freedom, and has become an important research hotspot in the application of multi-particle capture in the field of micromanipulation. In these applications, the vortex distribution of the vortex array has important research significance. [0003] The vortex array beams connected by light intensity are generally produced by the coaxial superposition of two or more spatially structured beams. In 2007, S.Franke-Arnold et...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/00G02B27/09
CPCG02B27/0012G02B27/0988
Inventor 李新忠张浩李懋王亚坤朱刘昊
Owner HENAN UNIV OF SCI & TECH