Print Email Facebook Twitter Liquid-crystal intraocular adaptive lens with wireless control Title Liquid-crystal intraocular adaptive lens with wireless control Author Simonov, A.N. Vdovine, G.V. Loktev, M. Faculty Electrical Engineering, Mathematics and Computer Science Department Micro Electronics Date 2007-06-01 Abstract We present a prototype of an adaptive intraocular lens based on a modal liquid-crystal spatial phase modulator with wireless control. The modal corrector consists of a nematic liquid-crystal layer sandwiched between two glass substrates with transparent low- and high-ohmic electrodes, respectively. Adaptive correction of ocular aberrations is achieved by changing the amplitude and the frequency of the applied control voltage. The convex-shaped glass substrates provide the required initial focusing power of the lens. A loop antenna mounded on the rim of the lens delivers an amplitude-modulated radio-frequency control signal to the integrated rectifier circuit that drives the liquid-crystal modal corrector. In vitro measurements of a 5-mm clear aperture prototype with an initial focusing power of +12.5 diopter, remotely driven by a radio-frequency control unit at ~6 MHz, were carried out using a Shack-Hartmann wavefront sensor. The lens based on a 40-?m thick liquid-crystal layer allows for an adjustable defocus of 4 waves, i. e. an accommodation of ~2.51 dioptres at a wavelength of 534 nm, and correction of spherical aberration coefficient ranging from –0.8 to 0.67 waves. Frequency-switching technique was employed to increase the response speed and eliminate transient overshoots in aberration coefficients. The full-scale settling time of the adaptive modal corrector was measured to be ~4 s. Subject active or adaptive opticswave-front sensingophthalmic optics and devicesliquid-crystal devicesvision modeling To reference this document use: http://resolver.tudelft.nl/uuid:6b784d8e-5bc6-459b-a248-0290f6605e18 DOI https://doi.org/10.1364/OE.15.007468 Publisher Optical Society of America ISSN 1094-4087 Source http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-15-12-7468 Source Optics Express, 15 (12), 2007 Part of collection Institutional Repository Document type journal article Rights (c) 2007 Optical Society of America Files PDF Simonov2007.pdf 818.28 KB Close viewer /islandora/object/uuid:6b784d8e-5bc6-459b-a248-0290f6605e18/datastream/OBJ/view