Optical phase conjugation assisted scattering lens: variable focusing and 3D patterning.

ABSTRACT: Variable light focusing is the ability to flexibly select the focal distance of a lens. This feature presents technical challenges, but is significant for optical interrogation of three-dimensional objects. Numerous lens designs have been proposed to provide flexible light focusing, including zoom, fluid, and liquid-crystal lenses. Although these lenses are useful for macroscale applications, they have limited utility in micron-scale applications due to restricted modulation range and exacting requirements for fabrication and control. Here, we present a holographic focusing method that enables variable light focusing without any physical modification to the lens element. In this method, a scattering layer couples low-angle (transverse wave vector) components into a full angular spectrum, a

SUBMITTER: Ryu J 

PROVIDER: S-EPMC4877672 | biostudies-literature | 2016 Apr

REPOSITORIES: biostudies-literature