title: Liquid tunable lens integrated with a rotational symmetric surface for long depth of focus.
abstract: A liquid tunable lens with an extended depth of focus (DOF) is proposed. By integrating a phase plate with rotational symmetric quartic function (QF) contour into the liquid lens cavity, the lens can achieve higher tolerance to the defocus aberration. The liquid lens was fabricated with a convenient and low-cost process that combined single-point diamond turning (SPDT) with soft lithography using polydimethylsiloxane (PDMS). Experimental results demonstrate that both focal length tunability and extended DOF can be achieved with the proposed liquid lens.
authors.affiliation: Wuhan National Laboratory for Optoelectronics, School of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China. kangjingran@gmail.com
authors.forename: Jingran
authors.initials: J
authors.lastname: Kang
authors.forename: Hongbin
authors.initials: H
authors.lastname: Yu
authors.forename: Haiqing
authors.initials: H
authors.lastname: Chen