Open AccessDesign and analysis of an 8x four-group zoom system using focus tunable lenses
Author(s) -
Sun-Hyung Jo,
Sung-Chan Park
Publication year - 2018
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.013370
Subject(s) - zoom , zoom lens , optics , paraxial approximation , lens (geology) , focus (optics) , focal length , computer science , simple lens , physics , beam (structure)
We present an 8x four-group zoom lens system for a compact camera without any moving groups by employing a focus tunable lens (FTL). We locate the FTLs at the second and fourth groups as a variator and a compensator. In the initial design stage, paraxial analysis for the zoom position was numerically determined by examining the solutions for various first group and third group powers, to achieve a physically meaningful and compact zoom system at a zoom ratio of 8x. The designed zoom lens has focal lengths of 4-31 mm and the apertures of F/3.5 to F/4.5 at wide and tele positions, respectively.