Multi-gear static zoom lens based on super-surface material

A zoom lens and metasurface technology, applied in the field of micro-nano optical zoom lens, can solve the problems of complex optical design, large volume and weight of zoom lens, difficult system design and manufacturing, etc. The effect of simple mechanical structure

Inactive Publication Date: 2019-11-05
WUHAN UNIV
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Problems solved by technology

Traditional zooming methods require complex optical design, heavy lens groups and the cooperation of precise mechanical mechanisms, which not only makes system design

Method used

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  • Multi-gear static zoom lens based on super-surface material
  • Multi-gear static zoom lens based on super-surface material
  • Multi-gear static zoom lens based on super-surface material

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Embodiment Construction

[0024] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below 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.

[0025] In the embodiment of the present invention, in order to achieve the same phase modulation function as the traditional lens, first, take a single nano-brick structure as an example, such as figure 2 , the metasurface material is composed of the underlying transparent substrate and nano-bricks, the xoy coordinate system is established with the center of the nano-brick as the origin, the long side of the nano-brick is taken as the long axis, the short side is taken as the short axis, and the angle between the long axis and the x-axis is taken as The steering angle φ of the nanobrick, ...

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Abstract

The invention discloses a multi-gear static zoom lens based on a super-surface material, the zoom lens is composed of a lens 1, a lens 2 and a gear shifting light shielding sheet, and a polarizer anda quarter wave plate are arranged along a laser beam incidence direction in sequence. The lens 1 and the lens 2 are constructed by etching super-surface lenses of nano-brick arrays on both sides of atransparent substrate, and the orientation angle of a nano-brick is determined by its distance from the center of the lens. The surface of the lens is equally divided into a plurality of gear regions,which respectively have different focal length values. The zoom lens can achieve a multi-gear zooming function just by rotating the gear shifting light shielding sheet, and can maintain an image surface position unchanged after zooming. The multi-gear static zoom lens has the advantages of simple zooming, small volume, light weight, high integration degree, convenient processing, and so on.

Description

technical field [0001] The invention belongs to the technical field of micro-nano optical zoom lenses, in particular to a multi-level static zoom lens based on metasurface materials. Background technique [0002] The principle of the zoom optical system is that the focal length changes within a certain range, but its image plane remains unchanged. The total focal length of an optical system is determined by the distance between the lens group and its principal plane. In traditional optics, it is difficult to realize that the focal length of a single lens changes according to a certain rule, so only certain intervals in the optical system can be changed to achieve the purpose of zooming. The traditional methods include mechanical compensation method and optical compensation method: the zoom group of the mechanical compensation method is composed of a zoom group and a compensation group. The zoom group performs linear motion, and the compensation group performs nonlinear moti...

Claims

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Application Information

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IPC IPC(8): G02B26/02G02B3/10G02B27/28
CPCG02B3/10G02B26/02G02B27/286
Inventor 郑国兴崔圆陈奎先陶金武霖刘子晨吴伟标李子乐刘勇毛庆洲李松
Owner WUHAN UNIV
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