A variable-focus liquid lens for miniature cameras is described. The lens uses the meniscus between two immiscible liquids, which can be adjusted by electrowetting to change the focal length. This lens is self-centered and has high optical quality. The lens is used in a miniature achromatic camera module, showing its suitability for portable applications. The lens is fabricated using two immiscible liquids with different refractive indices, one of which is electrically conducting. The lens is controlled by applying a voltage between electrodes, which changes the contact angle and thus the focal length. The lens can be driven by direct or alternating voltage, and it is capable of focusing over a wide range of diopters. The lens is robust and can operate in extreme environmental conditions. The lens is designed to be used in a camera module for mobile phones, with a high optical quality and fast focusing speed. The lens is also capable of chromatic aberration correction, making it suitable for various optical applications. The camera module has a high resolution and can focus at different distances. The lens is durable and can withstand a large number of focus cycles and high accelerations. The study demonstrates that liquid-based lenses are applicable in many fields of optics where robustness, size, speed, power consumption, and durability are critical.A variable-focus liquid lens for miniature cameras is described. The lens uses the meniscus between two immiscible liquids, which can be adjusted by electrowetting to change the focal length. This lens is self-centered and has high optical quality. The lens is used in a miniature achromatic camera module, showing its suitability for portable applications. The lens is fabricated using two immiscible liquids with different refractive indices, one of which is electrically conducting. The lens is controlled by applying a voltage between electrodes, which changes the contact angle and thus the focal length. The lens can be driven by direct or alternating voltage, and it is capable of focusing over a wide range of diopters. The lens is robust and can operate in extreme environmental conditions. The lens is designed to be used in a camera module for mobile phones, with a high optical quality and fast focusing speed. The lens is also capable of chromatic aberration correction, making it suitable for various optical applications. The camera module has a high resolution and can focus at different distances. The lens is durable and can withstand a large number of focus cycles and high accelerations. The study demonstrates that liquid-based lenses are applicable in many fields of optics where robustness, size, speed, power consumption, and durability are critical.