Design method of electromagnetic drive bidirectional zoom liquid lens
A technology of a liquid lens and a design method, which is applied in the directions of lenses, instruments, optics, etc., can solve the problem that liquid lenses are difficult to achieve high-quality bidirectional zoom, and achieve the effects of good optical transmittance, compact driving structure, and excellent imaging performance.
Active Publication Date: 2021-12-21
HUAZHONG UNIV OF SCI & TECH
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[0004] Aiming at the defects of the prior art, the purpose of the present invention is to provide a design method of an electromagnetically driven two-way zoom liquid lens, aiming to solve the problem that it is difficult for a liquid lens to achieve high-quality two-way zoom in a large focal length range
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[0032] 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. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
[0033] The structure of the liquid lens is composed of an unequal thickness elastic film structure, a transparent substrate and a liquid cavity, and is encapsulated by an electromagnetic drive device, such as figure 1 shown. The design of the non-isometric elastic membrane consists of the following steps:
[0034] (1) Optimize the surface shape of the unequal thickness elastic film structure: the ...
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The invention discloses a design method of an electromagnetic drive bidirectional zoom liquid lens, and belongs to the field of adaptive optical devices. By optimizing the surface shape and the central film thickness of the liquid lens, a non-uniform-thickness elastic film structure for dynamically correcting the aberration of the liquid lens is obtained, the non-uniform-thickness elastic film is arranged to be of a convex-flat structure, and the initial focal length of the liquid lens is infinite due to the fact that the filling liquid matches the refractive index of the non-uniform-thickness elastic film, so that the zooming range is greatly widened; the non-uniform-thickness elastic film in the light transmission area in the middle of a circular ring is driven to deform by extruding or stretching the designed driving circular ring, so that the whole driving structure is very compact; the high-integration electromagnetic driving mode is utilized, the current flowing through the coil is controlled in direction and magnitude, Lorentz forces with different directions and magnitudes are generated in a magnetic field generated by a permanent magnet to drive the liquid lens to generate deformation with different directions and different degrees, so that large-range bidirectional zooming is realized.
Description
technical field [0001] The invention belongs to the field of adaptive optical devices, and more particularly, relates to a design method of an electromagnetically driven bidirectional zoom liquid lens. Equal thickness elastic film structure, and realizes highly integrated bidirectional and large-scale zoom control of liquid lens by means of electromagnetic drive. Background technique [0002] The traditional zoom optical system realizes zooming by changing the distance between the lens groups, which depends on the cooperation of the precise mechanical structure, while the liquid lens, as an adaptive optical device, can realize the change of the focal length without adjusting the mechanical displacement. Extensive research and applications. [0003] In Chinese patent CN109459851A, it is proposed to obtain the initial structure for correcting the spherical aberration of the liquid lens by optimizing the initial focal length and the central film thickness. This design has a ve...
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IPC IPC(8): G02B27/00G02B3/14
CPCG02B27/0012G02B3/14
Inventor 余洪斌李海涛陈玉洁
Owner HUAZHONG UNIV OF SCI & TECH