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AfsoonJamali_PhD_Dissertation.pdf (7.81 MB)

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LARGE AREA TUNABLE LIQUID CRYSTAL LENS

Jamali, Afsoon, Jamali
http://orcid.org/0000-0001-6045-8345
http://rave.ohiolink.edu/etdc/view?acc_num=kent1541671894328594

Abstract Details

2018, PHD, Kent State University, College of Arts and Sciences / Chemical Physics.
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.
Philip Bos (Committee Chair)
230 p.
Optics; Physics
Large area tunable liquid crystal lens, Pancharatnam Berry Phase Lens, Accommodation-Convergence mismatch, Presbyopia

Recommended Citations

Citations

  • Jamali, Jamali, A. (2018). LARGE AREA TUNABLE LIQUID CRYSTAL LENS [Doctoral dissertation, Kent State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=kent1541671894328594

    APA Style (7th edition)

  • Jamali, Jamali, Afsoon. LARGE AREA TUNABLE LIQUID CRYSTAL LENS. 2018. Kent State University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=kent1541671894328594.

    MLA Style (8th edition)

  • Jamali, Jamali, Afsoon. "LARGE AREA TUNABLE LIQUID CRYSTAL LENS." Doctoral dissertation, Kent State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=kent1541671894328594

    Chicago Manual of Style (17th edition)

kent1541671894328594
1,451
© 2018, some rights reserved.Creative Commons License LARGE AREA TUNABLE LIQUID CRYSTAL LENS by Afsoon Jamali Jamali is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. Based on a work at etd.ohiolink.edu.
This open access ETD is published by Kent State University and OhioLINK.