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We demonstrate a multi-curved liquid lens with movable liquid–liquid(L–L)​ interface, which has a wide range of focal length. Due to movable L–L interface, the proposed lens can also be used as a single lens to achieve zoom function. The movement of the L–L interface can be achieved by controlling the flow of the liquid, which in turn changes the object distance and image distance to achieve the desired magnification. We fabricated a prototype based on this concept. The experimental result shows that when the movement distance of the L–L interface is ∼ 10 mm, the shortest positive and negative focal lengths of the lens are 9.3 mm and −8 mm, respectively, and the zoom ratio is 1.3 ×. The proposed multi-curved variable-focus lens simplifies the zoom imaging system, and its widespread applications in imaging systems are predictable. [ABSTRACT FROM AUTHOR]

• We propose an electrowetting liquid lens integrating adaptive liquid iris (ELL-LI) with adjustable radial aperture and axial position. • The liquid iris part is ring shape and does not need the flat support of a traditional liquid iris. • The aperture can change from 1.16 to 5.11 mm. • The iris can move up and down in the axial direction, according to different working electrodes on the side wall. • Experiments show that our proposed ELL-LI has the functions of depth of field expansion and field adjustment, which has a great application prospect in imaging systems, such as camera imaging systems, etc. Multifunctional integration is the development direction of electrowetting liquid lenses. We propose an electrowetting liquid lens integrating adaptive liquid iris (ELL-LI) with adjustable radial aperture and axial position. The liquid iris and the liquid lens are both driven by electrowetting on dielectric and integrated in the same chamber together, and share the same conductive liquid part. The liquid iris does not need the flat support of a traditional liquid iris. The aperture can change from 1.16 to 5.11 mm. The iris can move up and down in the axial direction, according to different working electrodes on the side wall. Experiments show that our proposed ELL-LI has the functions of depth of field expansion and field adjustment, which has a great application prospect in imaging systems, such as camera imaging systems, etc. [ABSTRACT FROM AUTHOR]

In this paper, we propose a real time, ultrahigh accuracy and full-field-of-view (RUF) algorithm for full field of view (FOV) imaging system. The proposed algorithm combines rough matching and precise matching method to stitch multiple images with the whole FOV in short time and high imaging quality. In order to verify real-time imaging effect of RUF algorithm, we also fabricate a multi-camera imaging system which includes 19 independent cameras. And the experiment result practically illustrates that full-FOV system can achieve good performances under a near-limiting FOV of 360° × 240° with low distortion, meanwhile, optical resolution reaches up to 95 megapixels. 100% registration-accuracy RUF algorithm for imaging in one second can be widely applied to any optical imaging engineering field with large FOV, such as remote sensing imaging, microscopy imaging, monitoring system engineering fields and so on. [ABSTRACT FROM AUTHOR]