Unlock instant, AI-driven research and patent intelligence for your innovation.

Hexagon Talbot array illuminator and manufacturing method thereof

An illuminator, hexagonal technology, applied in the direction of instruments, optics, optical components, etc., can solve the problems of limited multiple phase orders, reduced diffraction efficiency, complex processing process, etc., to achieve easy processing and replication, high strength The effect of uniform distribution and simple device structure

Inactive Publication Date: 2016-01-13
LUDONG UNIVERSITY
View PDF7 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are many methods that can be used to generate array spots, such as using microlens arrays, common gratings and Damman gratings; however, the intensity distribution of array spots produced by microlens arrays and ordinary diffraction gratings is not uniform; up to The Daman grating can produce array spots with uniform intensity distribution, but the number of array spots produced by the Daman grating is limited, and the diffraction efficiency of the Daman grating decreases with the increase of the number of array spots, so the Daman grating cannot produce High diffraction efficiency, high compression ratio and large number of array spots
[0004] The Talbot array illuminator made by the fractional Talbot effect can produce array spots with uniform intensity distribution, high diffraction efficiency and arbitrary compression ratio; and different beam splitting ratios can appear at each fractional Talbot distance. Fewer grating units to obtain more array spot numbers [Opt.Lett.15,288 (1990); US Patent US5124843]; but Taber array spot generators are all based on a multi-order phase plate, to obtain high diffraction efficiency , high compression ratio, and a large number of array spots, the higher the phase order required will be; however, it is difficult to produce such a high-order phase plate with the current processing technology, and the processing process is complicated, and the price of the phase plate produced Expensive, difficult to replicate, difficult to apply in practice
Secondly, the existing array spot generation technology is mainly aimed at the orthogonal lattice structure, and few technologies can generate hexagonal array spot
Although it has been reported [IEEEJ.QUANTUM.ELECT.49,471(2013); Opt.Lett.27,228(2002)] to produce a hexagonal lattice structure of light spots, but this technology is still limited by multiple phase orders, it is difficult to process High-order hexagonal Taber array illuminator is used to produce hexagonal array spot with high diffraction efficiency and high compression ratio

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Hexagon Talbot array illuminator and manufacturing method thereof
  • Hexagon Talbot array illuminator and manufacturing method thereof
  • Hexagon Talbot array illuminator and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Such as figure 1 As shown, a preparation method of a hexagonal Taber array illuminator specifically includes the following steps:

[0046] Step 1: Set the number values ​​M and N of the hexagonal array light spots in two directions, correspondingly set M×N regular hexagonal primitives of the same size, and the vertical distance △ and spot compression ratio γ of each primitive;

[0047] Step 2: Calculate the phase value of each primitive at the corresponding position through the number values ​​M and N of the hexagonal array spot in two directions, as well as the vertical distance △ of the primitive and the spot compression ratio γ

[0048] Step 3: According to the phase value of each primitive Calculate the relative displacement value δ between the center of the second light hole in each primitive and the center of the first light hole of the primitive mn , and then determine the geometric structure of each primitive;

[0049] Step 4: According to the geometric st...

Embodiment 2

[0076] The basic idea of ​​the present invention is: first, the pure phase distribution formula [J.Opt.Soc.Am.A25,203(2008)] of the hexagonal Taber array illuminator given based on the theoretical analysis of fractional Taber effect, obtains The phase distribution of the fractional Taber array with high compression ratio of any order; then, according to the circuitous phase encoding principle [Appl. Elementary processing: Divide the whole hexagonal Taber array illuminator into closely arranged regular hexagonal sampling units, put a small regular hexagonal light hole into each sampling unit, and change the small regular hexagonal light The position between the center of the aperture and the sampling center is used to encode the phase; finally, the multi-order phase distribution of each element in the hexagonal Talbot array illuminator is encoded into a binary (0, π) distribution, so that the multiple The order Talbot array illuminator is transformed into a binary array illumin...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a hexagon Talbot array illuminator and a manufacturing method thereof. The method concretely includes the following steps: setting the number values M and N of hexagon array light spots in two directions, correspondingly setting M*N hexagon elements with the same dimension, and setting the vertical distances [delta] of the elements and a light spot compression ratio [gamma]; calculating a phase value [phi]mn of each element in a corresponding place according to the number values M and N of the hexagon array light spots in two directions, the vertical distances [delta] of the elements and the light spot compression ratio [gamma]; calculating a relative displacement value [delta]mn of the center of a second light through hole in each element and the center of a first light through hole in the element, and determining the geometric structure of each element; closely arranging the M*N elements according to a position parameter (m, n), and generating a binary phase distribution map; and manufacturing a hexagon Talbot array illuminator according to the binary phase distribution map. Compared with the prior art, the invention has the advantages that the intensity uniform distribution is achieved, the diffraction efficiency is high, and the compression ratio is high.

Description

technical field [0001] The invention relates to the technical field of optical array illuminator, in particular to a hexagonal Taber array illuminator and a preparation method. Background technique [0002] Optical array illuminator or beam splitter is a new type of diffractive optical element. Its function is to divide the incident light beam into a regularly arranged lattice structure, and realize the functions of uniform distribution of optical power, multi-channel interconnection and micro-pattern transmission. ; The optical array illuminator has high speed and parallelism, and has a wide range of application values ​​in the fields of optical computing, optical communication, and photoelectric hybrid processing. [0003] At present, there are many methods that can be used to generate array spots, such as using microlens arrays, common gratings and Damman gratings; however, the intensity distribution of array spots produced by microlens arrays and ordinary diffraction gra...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/00G02B5/18G02B27/42
CPCG02B27/0087G02B5/1876G02B5/1885G02B27/0037G02B27/425
Inventor 朱林伟孙美玉陈建农李志刚
Owner LUDONG UNIVERSITY