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A Design Method of Mask Plate for V-shaped Beam

A design method and mask technology, applied in optics, optical components, instruments, etc., can solve problems such as difficulty in adjusting the experimental optical path and difficult industrialized production, and achieve the effect of simplifying the optical path structure

Active Publication Date: 2020-05-15
HENAN UNIV OF SCI & TECH
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Problems solved by technology

However, this optical path requires two laser beams to be coupled, which brings difficulties to the adjustment of the experimental optical path and is difficult to apply to industrial production.
[0004] In summary, there is still a lack of a single-beam laser mode that can be applied to the field of cell sorting

Method used

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  • A Design Method of Mask Plate for V-shaped Beam
  • A Design Method of Mask Plate for V-shaped Beam
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Embodiment Construction

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0023] First, based on the accurate orthogonal solution of the spatial paraxial wave equation in the elliptical coordinate system, the electric field expression of a V-shaped beam is theoretically deduced as:

[0024]

[0025] Among them, p is the order of the V-shaped beam; ξ∈[0,∞), η∈[0,2π) represent the radial and angular elliptic variables, respectively; ω 0 is the Gaussian beam waist radius; where, r is the radial position vector; Indicates the ellipse parameter; f 0 is the half focal length; C is the normalization parameter; C p and S 2p Respectively be the even degree of order p and the odd degree Innes polynomial of order 2p, a, b are the scale factor of Ince polynomial; Its value is a=8.6849×10 in the embodiment 3 ,b=1.8964×10 11 .

[0026] The phase expression of the blazed grating is: P 0 =2πx / d; where d is the p...

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Abstract

The invention discloses a method for designing a mask plate of a V-shaped beam, which includes the following steps: Step 1. Based on the accurate orthogonal solution of the spatial paraxial wave equation in an elliptical coordinate system, an electric field expression of a V-shaped beam is deduced Formula V p ε ; Step 2, for the electric field expression V p ε Find the angle function, get angle (V p ε ), and with a blazed grating P 0 combined to get angle (V p ε )+P 0 ; Step 3, using the principle of computational holography to obtain the specific expression of the complex transmittance function of the mask plate of the V-shaped beam through computer coding: ; The mask plate described based on the complex transmittance function is the described V-beam mask. The mask plate designed by the invention can generate a V-shaped light beam in which each light lobe is V-shaped. The number of V-shaped light lobes is controllable, and the number is twice the order p. The light path structure is significantly simplified; thus, it has a very important application prospect in cell sorting technology.

Description

technical field [0001] The invention relates to the fields of particle manipulation and quantum information coding, in particular to a method for designing a V-shaped light beam mask. Background technique [0002] With the continuous development of laser technology, phase-structured beams have become a research hotspot in the field of spatially structured light fields, and are widely used in quantum information coding, particle sorting and control, optical super-resolution, and optical image processing. Among them, the Ince-Gaussian (IG) beam has a unique advantage in the research work in the field of particle manipulation due to the diversity of its spatial mode distribution. [0003] On the other hand, regarding the sorting of microparticles, researchers have done a lot of research, but mainly focused on fluorescence activated cell sorting and pure optical cell sorting. In 1999, Anne Y.Fu and others studied a miniature fluorescence-activated cell sorter that has the advan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/00G02B27/09
CPCG02B27/0012G02B27/0911G02B27/0944
Inventor 台玉萍张浩李新忠李贺贺唐苗苗王静鸽
Owner HENAN UNIV OF SCI & TECH
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