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Large Area Tunable Liquid Crystal Lens.

Kent State University.

Large Area Tunable Liquid Crystal Lens.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Large Area Tunable Liquid Crystal Lens./
Author:	Jamali, Afsoon.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2018,
Description:	231 p.
Notes:	Source: Dissertation Abstracts International, Volume: 80-05(E), Section: B.
Contained By:	Dissertation Abstracts International80-05B(E).
Subject:	Physics. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=13819462
ISBN:	9780438772915

Large Area Tunable Liquid Crystal Lens.
Jamali, Afsoon.

Large Area Tunable Liquid Crystal Lens. - Ann Arbor : ProQuest Dissertations & Theses, 2018 - 231 p.

Source: Dissertation Abstracts International, Volume: 80-05(E), Section: B.

Thesis (Ph.D.)--Kent State University, 2018.

A large area tunable lens based on liquid crystals, which is considered for near-to-eye applications, is designed, built, and characterized. Large liquid crystal (LC) lenses with high quality are limited by very slow switching speeds due to the large optical path difference (OPD) required. To reduce the switching time of the lens, the thickness is controlled through the application of several phase segments, similar to the design of a Fresnel lens. A main point of this dissertation is the design of segmented structure to have a minimal effect on the image quality. Our modeling and experimental results demonstrate that minimal image degradation due to the phase segments is observable when the segment spacing is chosen by taking into account human eye resolution. Such lenses have applications related to presbyopia and, in virtual reality (VR) systems, to solve the well-known issue of Accommodation-Convergence (AC) mismatch. To further enhance the optical power of the lens without compromising the response time a hybrid system was proposed. The proposed hybrid system is comprised of Segmented Phase Profile (SPP) and Pancharatnam phase LC lenses. Characterization results indicates that the proposed hybrid system holds considerable promise for overcoming AC conflict in VR systems.

ISBN: 9780438772915Subjects--Topical Terms:

564049
Physics.

Large Area Tunable Liquid Crystal Lens.
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245 1 0 $a Large Area Tunable Liquid Crystal Lens.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2018
300 $a 231 p.
500 $a Source: Dissertation Abstracts International, Volume: 80-05(E), Section: B.
500 $a Adviser: Philip Bos.
502 $a Thesis (Ph.D.)--Kent State University, 2018.
520 $a A large area tunable lens based on liquid crystals, which is considered for near-to-eye applications, is designed, built, and characterized. Large liquid crystal (LC) lenses with high quality are limited by very slow switching speeds due to the large optical path difference (OPD) required. To reduce the switching time of the lens, the thickness is controlled through the application of several phase segments, similar to the design of a Fresnel lens. A main point of this dissertation is the design of segmented structure to have a minimal effect on the image quality. Our modeling and experimental results demonstrate that minimal image degradation due to the phase segments is observable when the segment spacing is chosen by taking into account human eye resolution. Such lenses have applications related to presbyopia and, in virtual reality (VR) systems, to solve the well-known issue of Accommodation-Convergence (AC) mismatch. To further enhance the optical power of the lens without compromising the response time a hybrid system was proposed. The proposed hybrid system is comprised of Segmented Phase Profile (SPP) and Pancharatnam phase LC lenses. Characterization results indicates that the proposed hybrid system holds considerable promise for overcoming AC conflict in VR systems.
590 $a School code: 0101.
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650 4 $a Optics. $3 595336
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710 2 $a Kent State University. $b College of Arts and Sciences / Department of Chemical Physics. $3 1213905
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856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=13819462

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