A composite helical zone plate and its construction method

A construction method and helical wave technology, which can be applied to instruments, optics, diffraction gratings, etc.

Active Publication Date: 2021-08-10
YANGTZE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A composite helical zone plate and its construction method
  • A composite helical zone plate and its construction method
  • A composite helical zone plate and its construction method

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Embodiment Construction

[0020] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

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

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

[0023] S1. Dete...

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Abstract

The invention discloses a compound helical zonal plate and its construction method, which is constructed according to the following method: determine the parameters of the first helical zonal plate and the parameters of the ring-shaped first filter plate, and combine the first helical zonal plate and the second helical zonal plate A filter is coaxially shielded and compounded to form an inner ring part; the parameters of the second helical zone plate are determined, and the second helical zone plate is formed by coaxially shielding the second helical zone plate and the previously formed second filter that fits the inner ring part. An outer ring part; the inner ring part is coaxially embedded in the outer ring part, and the number of helical zones of the second helical zone plate is adjusted to make the optical vortex formed by the outer ring part and the optical vortex intensity formed by the inner ring part same. The composite helical zone plate constructed by the present invention has two optical vortices with equal intensity, and the axial positions of the two optical vortices can be adjusted arbitrarily according to their corresponding parameters, so that the constructed composite helical zone plate can achieve a large Capacitive optical information storage, optical communication, and the realization of axial multi-plane dynamic operation of particles in three-dimensional photophotography technology.

Description

technical field [0001] The invention relates to optoelectronic technology, in particular to a composite spiral zone plate and its construction method. Background technique [0002] Multiple optical vortices have many applications in different fields. Multiple optical vortices on the optical axis can be used to simultaneously trap particles, and array vortices with fractional topological charges can be used for optical sorting. [0003] Spiral phase photos can be used to generate optical vortices. Interfering double vortex lights with two opposite unequal topological charges can be used to generate wheelchair and ring lights at the focal plane. Spiral zone plates can generate optical vortices in the focal plane. Square helical zone plates can generate different focusing light vortices. Helical zone plates can be used in the field of soft X-ray microscopy. Helical zone plates can be used to measure the rotational Doppler effect of plane polarized light with a helical wavef...

Claims

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Application Information

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