title: Experimental far-field imaging properties of a ~5-μm diameter spherical lens.
abstract: Microscale lenses are mostly used as near-sighted lenses. The far-field imaging properties of a microscale spherical lens, where the lens is spatially separated from the object, are experimentally studied. Our experimental results show that, for a blu-ray disc (an object) whose spacing is 300 nm, the lens can magnify the stripe patterns of the disc when the lens is spatially separated from the object. In the experimentally tested range (0-14 μm), all the magnified images are virtual images. When the distance is increased from 0 to 14 μm the magnification decreases from 1.47× to 1.20× and the field of view increases from 3.8 to 12.2 μm. The image magnification cannot be described by standard geometrical optics.
authors.affiliation: Department of Physics, Nanjing Normal University, Nanjing 210097, China.
authors.forename: Ran
authors.initials: R
authors.lastname: Ye
authors.forename: Yong-Hong
authors.initials: YH
authors.lastname: Ye
authors.forename: Hui Feng
authors.initials: HF
authors.lastname: Ma
authors.forename: Jun
authors.initials: J
authors.lastname: Ma
authors.forename: Bin
authors.initials: B
authors.lastname: Wang
authors.forename: Jie
authors.initials: J
authors.lastname: Yao
authors.forename: Shuai
authors.initials: S
authors.lastname: Liu
authors.forename: Lingling
authors.initials: L
authors.lastname: Cao
authors.forename: Huanhuan
authors.initials: H
authors.lastname: Xu
authors.forename: Jia-Yu
authors.initials: JY
authors.lastname: Zhang
mesh_terms: D007909:Lenses; D055616:Microtechnology / Q000295:instrumentation*; D061848:Optical Imaging / Q000295:instrumentation*