Title :
A tunable liquid lens with extended depth of focus
Author :
Kang, Jingran ; Zhou, Guangya ; Yu, Hongbin ; Chau, Fook Siong ; Chen, Haiqing
Author_Institution :
Dept. of Mech. Eng., Nat. Univ. of Singapore, Singapore, Singapore
Abstract :
A liquid tunable lens with extended depth of focus (DOF) is presented. By integrating a rotational symmetric quartic function (QF) phase plate into the liquid lens´ cavity, the lens can achieve higher tolerance to the defocus aberration. The liquid lens was fabricated through a convenient and low-cost process that combined single-point diamond turning (SPDT) with soft lithography using polydimethylsiloxane (PDMS). Experimental and theoretical results are in good agreement. Both focal length tunability and extended DOF have been demonstrated with the proposed liquid lens.
Keywords :
aberrations; lenses; optical fabrication; optical focusing; optical retarders; optical tuning; soft lithography; turning (machining); DOF; defocus aberration; extended depth of focus; focal length tunability; liquid lens; phase plate; polydimethylsiloxane; soft lithography; symmetric quartic function; Biomembranes; Cavity resonators; Charge coupled devices; Fabrication; Lenses; Optimized production technology; Soft lithography;
Conference_Titel :
Optical MEMS and Nanophotonics (OPT MEMS), 2010 International Conference on
Conference_Location :
Sapporo
Print_ISBN :
978-1-4244-8926-8
Electronic_ISBN :
978-1-4244-8925-1
DOI :
10.1109/OMEMS.2010.5672171
