Composite spiral zone plate and construction method thereof

A construction method and helicon wave technology, applied in optics, instruments, optical components, etc., can solve problems such as difficult fabrication of phase-type equipment

Active Publication Date: 2019-01-11
YANGTZE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these phase-type devices are difficult to fabricate
All in all, the above-mentioned devices cannot simply generate two equal-intensity optical vortices in the axial direction

Method used

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  • Composite spiral zone plate and construction method thereof
  • Composite spiral zone plate and construction method thereof
  • Composite spiral zone plate and construction method thereof

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Embodiment Construction

[0020] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

[0021] The present invention provides a composite spiral zone plate, which includes an inner ring part of a first spiral zone plate and an outer ring part of a second spiral zone plate. The inner ring part is coaxially fitted and embedded in the outer ring. In the ring portion, the optical vortex formed by the outer ring portion and the optical vortex formed by the inner ring portion have the same intensity and are located on the axis of the inner ring.

[0022] The above-mentioned composite spiral zone plate of this embodiment can be constructed as follows:

[0023] S1. Determine the parameter...

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Abstract

The invention discloses a composite spiral zone plate and a construction method thereof. The composite spiral zone plate is constructed through the following method: determining a parameter of a firstspiral zone plate and the parameter of an annular first filter disc, compositing the first spiral zone plate and the first filter disc to form a first inner ring part through coaxially sheltering; determining the parameter of a second spiral zone plate, and compositing the second spiral zone plate and a second filter disc which is formed previously and accords with the inner ring part to form anexternal ring part through coaxially sheltering; and coaxially embedding the inner part in the external ring part, and adjusting the number of spiral wave zones of the second spiral zone plate to enable an optical vortex formed by the external ring part to have the same strength with the optical vortex formed by the inner ring part. The composite spiral zone plate constructed according to the method provided by the invention has two optical vortexes with the same strength, axial positions of the two optical vortexes can be freely adjusted according to corresponding parameters thereof, and consequently, the constructed complex spiral zone plate can realize high-capacity optical information storage and optical communication and realize axial multi-plane dynamic operation to particles in a three-dimensional light photography technology, and so on.

Description

Technical field [0001] The invention relates to optoelectronic technology, in particular to a composite spiral wave zone plate and a construction method thereof. Background technique [0002] Multiple optical vortices have many applications in different fields. Multiple optical vortices on the optical axis can be used to simultaneously capture particles, and array vortices with fractional topological charges can be used for optical sorting. [0003] Spiral photos can be used to generate optical vortices. The interfering double vortex light with two opposite unequal topological charges can be used to generate wheelchair and ring light at the focal plane. The spiral zone plate can produce light vortices in the focal plane. The square spiral zone plate can produce different focused light vortices. The spiral zone plate can be used in the field of soft X-ray microscopy. The spiral zone plate can be used to measure the rotating Doppler effect of plane-polarized light with a spiral w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/18
CPCG02B5/1876
Inventor 程书博
Owner YANGTZE UNIVERSITY
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