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Electrowetting-type variable-focus liquid lens comprising gradient index material

A gradient refractive index and liquid lens technology, which is applied in the field of electrowetting variable focus liquid lenses, can solve the problems of difficult processing and poor sealing performance of diffractive lenses, and achieve the effects of easy processing accuracy, good sealing performance and easy processing

Active Publication Date: 2015-03-04
西安应用光学研究所
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide an electrowetting variable-focus liquid lens containing gradient refractive index materials for the shortcomings of the diffractive lens in the refractive-diffractive hybrid zoom liquid lens that is difficult to process and has poor sealing performance

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  • Electrowetting-type variable-focus liquid lens comprising gradient index material
  • Electrowetting-type variable-focus liquid lens comprising gradient index material
  • Electrowetting-type variable-focus liquid lens comprising gradient index material

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Embodiment Construction

[0028] The present invention will be further described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0029] as figure 1 As shown, the preferred embodiment of the electrowetting variable focus liquid lens of the present invention includes a first lens 1 , a cavity 2 , a conductive liquid 3 , an insulating liquid 4 and a second lens 5 . The first lens 1 is a plano-convex lens with positive focal length made of graded index material (referring to figure 2 ), the front surface is a spherical surface 1-1, and the rear surface is a plane 1-2, on which an ITO conductive film 1-3 is plated by chemical vapor deposition, and the thickness of this embodiment is 125nm. Cavity 2 is an inverted U-shaped cylinder made of Kovar material (see image 3 ), the top surface has a through hole, and the inner surface and the top surface are coated with a hydrophobic dielectric film 2-1. In this embodiment, the hydrophobic dielectric film 2-1 is 16 μm t...

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Abstract

The invention discloses an electrowetting-type variable-focus liquid lens comprising a gradient index material and belongs to the technical field of optics. The main characteristics are that the front and back surfaces of the liquid lens adopt a plano-convex lens and a plano-concave lens which are made of the gradient index materials respectively and are easy to process; and through reasonably selecting gradient index coefficients A, B and C matched with the two lenses, spherical aberration and chromatic aberration are compensated, and thus the imaging quality of the liquid lens is improved. Besides, a cavity of the liquid lens is made of Kovar materials, so that electrodes can be led out from the cavity directly without plating metal electrodes on the inner wall of the cavity, and the cavity and the two lenses can be welded by utilizing a high-frequency welding method, and thus the seal performance of the liquid lens is effectively improved. The liquid lens overcomes the defect that a common liquid lens can only change focal length but cannot eliminate chromatic aberration and aberration simultaneously; and the liquid lens has the advantages of being excellent in image quality, being capable of forming an optical system independently in application, being small in size, and not needing other elements to participate in imaging.

Description

technical field [0001] The invention belongs to the field of optical technology, and relates to an electrowetting variable focus liquid lens, in particular to an electrowetting variable focus liquid lens containing gradient refractive index materials. Background technique [0002] Electrowetting variable focus liquid lens is a new type of optical element, which is based on the concept of bionics, without any moving components, and has a certain ability to zoom autonomously. The electrowetting variable focus liquid lens controls the wetting characteristics of the liquid on the solid surface by changing the applied voltage of the liquid-solid interface, so as to realize the change of the focal length. This lens has the advantages of short response time, wide zoom range, no mechanical moving parts, and good integration performance. Therefore, applying this element to the zoom system can complete the functions that traditional optical elements are difficult to accomplish, and a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B3/14G02B26/02
CPCG02B3/14G02B26/004
Inventor 袁良范纪红李元李宏光谢毅张博妮张建付曹锋孙宇楠姜昌禄郭羽
Owner 西安应用光学研究所
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