Electrowetting liquid lens with multiphase gradient refractive-index change

Abstract

The invention discloses an electrowetting liquid lens with multiphase gradient refractive-index change. The lens comprises a hollow transparent tube; each of the inner and outer sidewall of the transparent tube is coated with a conductive layer and a hydrophobic insulating layer from inside to outside; a transparent conductive substrate and a transparent conductive cover plate are fixedly arranged at the lower end and the upper end of the transparent tube respectively; and an inner cavity, enclosed by the transparent conductive substrate and the transparent conductive cover plate, of the transparent tube is filled with a conductive liquid layer and at least three types of non-polarity liquid layers, the conductive liquid layer is insoluble in the non-polarity liquid layers, and the refractive index of each non-polarity liquid layer is in gradient change, or the inner cavity is filled with a conductive liquid layer whose one phase of concentration is in gradient change and the non-polarity liquid layers insoluble in the conductive liquid layer. The hollow transparent tube is a quartz glass tube, the internal diameter of the transparent tube ranges from 0.001 to 10mm, the external diameter from 0.01 to 10mm, and the height from 0.01 to 10mm. The electrowetting liquid lens with multiphase gradient refractive-index change can overcome technical defects that a present electrowetting lens has chromatic and spherical aberration, is complex in structure and is difficult to manufacture, and that the optical axis is difficult to calibrate when multiple lenses are combined in use.

Description

technical field [0001] The invention relates to the field of electrowetting lenses, in particular to an electrowetting liquid lens with multiphase refractive index gradient changes. Background technique [0002] Variable focus lenses are widely used in integrated imaging devices such as mobile phones, cameras, and microscopes. The traditional zoom lens is composed of multiple lenses, and a mechanical device is used to adjust the relative position of the lenses to achieve the purpose of zooming. Therefore, complex structures, high energy consumption, and easy wear and tear have become the main disadvantages of traditional zoom systems. Liquid zoom is a good way. There are three ways to achieve liquid zoom: (1) Change the internal refractive index of the variable-focus liquid lens, and use physical and chemical methods to change the internal parameters such as liquid density and transmittance; (2) Change the curvature of the liquid surface , by pressurizing the liquid surfac...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the deficiencies of the prior art, the present invention provides an electrowetting liquid lens with a multiphase refractive index gradient change, which solves the existing electrowetting lens chromatic aberration, spherical aberration, complex structure, difficult manufacture, and combination of multiple lenses. There are technical defects such as optical axis alignment problems when used

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