Liquid Crystal Lens Array with Thermally Controllable Focal Length and Electrically Convertible Lens Type

Title
Liquid Crystal Lens Array with Thermally Controllable Focal Length and Electrically Convertible Lens Type
Author(s)
곽진석허경찬권진혁
Keywords
MICROLENS ARRAY; REFRACTIVE-INDEXES
Issue Date
201502
Publisher
OPTICAL SOC KOREA
Citation
JOURNAL OF THE OPTICAL SOCIETY OF KOREA, v.19, no.1, pp.88 - 94
Abstract
This paper reports the fabrication of a lenticular liquid crystal (LC) lens array with thermally tunable focus and with the function of a convertible lens type, using the surface structure of a UV-curable polymer and a twisted-nematic (TN) LC cell. The TN LC cell makes the LC lenticular lens function as a converging or diverging lens by controlling electrically the polarization of input light. Therefore, the focal lengths for both the converging and diverging lenses, which can be switched from the TN cell, can be tuned by changing the effective refractive index of the LC by Joule heating of the transparent electrode. As a result, the focal length of the lens with the E7 LC was changed continuously from 8.7 to 31.2 mm for the converging lens type and from -9.8 to -14.2 mm for the diverging lens when the temperature was increased from 25 to 56 degrees C.
URI
http://hdl.handle.net/YU.REPOSITORY/33518http://dx.doi.org/10.3807/JOSK.2015.19.1.088
ISSN
1226-4776
Appears in Collections:
이과대학 > 물리학과 > Articles
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