Liquid lens capable of realizing electronic control focusing

Abstract

The present invention discloses a liquid lens capable of realizing electronic control focusing. The liquid lens comprises: a first lens fixing ring (01), a second fixing ring (02), a first lens window(03), a piezoelectric ceramic tube (04), a straight-line guiding rail (05), a piezoelectric actuator (06), a pushing pressing piece (07), an actuating cavity (08), a liquid cavity (09), a second lenswindow (10), a lens external interface (11), a vision sensor (12), a lens shell (13), a sealed lens (14), a first sealing ring (15), a second sealing ring (16), a driving foot B (17), a piezoelectricceramic stack B (18), a actuator B shell (19), a actuator C shell (20), a piezoelectric ceramic stack C (21), a driving foot C (22), a actuator A shell (23), a piezoelectric ceramic stack A (24) anda driving foot A (25). According to the liquid lens, by applying a sinusoidal alternating current voltage signal on an internal electrode and an external electrode of the piezoelectric ceramic tube (04), a radial ultrasound field is generated in the piezoelectric ceramic tube (04), so that the internal liquid refractive index is changed, and thus focal length of the liquid lens is changed. By controlling the piezoelectric actuator (06), the liquid height in the liquid cavity (09) is changed, and thus the imaging size of objects is changed. The liquid lens capable of realizing the electronic control focusing has the advantages of convenient and simple manufacture, wide application range and strong practicability.

Description

technical field [0001] The invention relates to an electrically controlled focusing liquid lens. Background technique [0002] According to different working principles and structures, the current liquid lenses can be divided into three categories: (1) double liquid lenses based on the principle of electrowetting; (2) single liquid lenses that change the shape and volume of the lens through mechanical force; (3) A liquid crystal lens that changes the alignment state of liquid crystal molecules by applying electricity to cause a change in the refractive index. [0003] Since the liquid lens does not require mechanical movement, the liquid lens has the advantages of small size, convenient operation, and easy integration compared with the previous lens that uses mechanical movement to adjust the focus. So it is widely used. The current mainstream liquid lens is a variable-focus lens based on the phenomenon of electrowetting, in which electrodes coated with a special insulatin...

AI Technical Summary

Problems solved by technology

However, this liquid lens is composed of two liquids, and the focal length is changed by changing the curvature, which indirectly increases the complexity and cost of its production.

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