Electrically Tunable Binary-Phase Fresnel Lens Based on Polymer Dispersed Liquid Crystal
<p>This is a proposal for a Fresnel lens with an electrically tunable binary-phase made of polymer dispersed liquid crystal (PDLC), which has relatively fast response time and low applied voltage. Simple fabrication is the major advantage of the proposed method. In this study, NOA65 and E7 wer...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Kaunas University of Technology
2017-08-01
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| Series: | Medžiagotyra |
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| Online Access: | http://matsc.ktu.lt/index.php/MatSc/article/view/16317 |
| _version_ | 1811270410196484096 |
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| author | Hui LI Fan PAN Yuntao WU Yanduo ZHANG Xiaolin XIE |
| author_facet | Hui LI Fan PAN Yuntao WU Yanduo ZHANG Xiaolin XIE |
| author_sort | Hui LI |
| collection | DOAJ |
| description | <p>This is a proposal for a Fresnel lens with an electrically tunable binary-phase made of polymer dispersed liquid crystal (PDLC), which has relatively fast response time and low applied voltage. Simple fabrication is the major advantage of the proposed method. In this study, NOA65 and E7 were utilized with weight ratios of 60 wt.%: 40 wt.%. There was also the utilization of a relatively low intensity UV-light, 0.53 mW/cm<sup>2</sup>. The duration time of exposure was about 30 hours. The performance improvement of the Fresnel lens resulted from the infiltration of large LC droplet into the PDLC film. The phenomenon of black cross strip patterns could be explained with the use of the electro-hydrodynamics theory. The diffraction efficiency of the proposed lens was from 31.1 % to 41 % with the changes of externally applied voltage. This work presents an effective approach to get relatively complete phase separation in PDLC. The proposed method also provides great potential in developing high performance Fresnel lens.</p><p>DOI: <a href="http://dx.doi.org/10.5755/j01.ms.23.2.16317">http://dx.doi.org/10.5755/j01.ms.23.2.16317</a></p> |
| first_indexed | 2024-04-12T22:00:15Z |
| format | Article |
| id | doaj.art-263c713f7e244e78998bcd2d29d01b57 |
| institution | Directory Open Access Journal |
| issn | 1392-1320 2029-7289 |
| language | English |
| last_indexed | 2024-04-12T22:00:15Z |
| publishDate | 2017-08-01 |
| publisher | Kaunas University of Technology |
| record_format | Article |
| series | Medžiagotyra |
| spelling | doaj.art-263c713f7e244e78998bcd2d29d01b572022-12-22T03:15:08ZengKaunas University of TechnologyMedžiagotyra1392-13202029-72892017-08-0123211912310.5755/j01.ms.23.2.163178462Electrically Tunable Binary-Phase Fresnel Lens Based on Polymer Dispersed Liquid CrystalHui LI0Fan PAN1Yuntao WU2Yanduo ZHANG3Xiaolin XIE4School of Computer Science and Engineering, Wuhan Institute of Technology; Hubei Key Laboratory of Intelligent Robot; School of Chemistry and Chemical Engineering, Huazhong University of Science and TechnologyCollege of Post and Telecommunication, Wuhan Institute of TechnologySchool of Computer Science and Engineering, Wuhan Institute of Technology; Hubei Key Laboratory of Intelligent RobotSchool of Computer Science and Engineering, Wuhan Institute of Technology; Hubei Key Laboratory of Intelligent RobotSchool of Chemistry and Chemical Engineering, Huazhong University of Science and Technology<p>This is a proposal for a Fresnel lens with an electrically tunable binary-phase made of polymer dispersed liquid crystal (PDLC), which has relatively fast response time and low applied voltage. Simple fabrication is the major advantage of the proposed method. In this study, NOA65 and E7 were utilized with weight ratios of 60 wt.%: 40 wt.%. There was also the utilization of a relatively low intensity UV-light, 0.53 mW/cm<sup>2</sup>. The duration time of exposure was about 30 hours. The performance improvement of the Fresnel lens resulted from the infiltration of large LC droplet into the PDLC film. The phenomenon of black cross strip patterns could be explained with the use of the electro-hydrodynamics theory. The diffraction efficiency of the proposed lens was from 31.1 % to 41 % with the changes of externally applied voltage. This work presents an effective approach to get relatively complete phase separation in PDLC. The proposed method also provides great potential in developing high performance Fresnel lens.</p><p>DOI: <a href="http://dx.doi.org/10.5755/j01.ms.23.2.16317">http://dx.doi.org/10.5755/j01.ms.23.2.16317</a></p>http://matsc.ktu.lt/index.php/MatSc/article/view/16317chiral molecules dopant, polymer dispersed liquid crystals, grating, polarization-independent |
| spellingShingle | Hui LI Fan PAN Yuntao WU Yanduo ZHANG Xiaolin XIE Electrically Tunable Binary-Phase Fresnel Lens Based on Polymer Dispersed Liquid Crystal Medžiagotyra chiral molecules dopant, polymer dispersed liquid crystals, grating, polarization-independent |
| title | Electrically Tunable Binary-Phase Fresnel Lens Based on Polymer Dispersed Liquid Crystal |
| title_full | Electrically Tunable Binary-Phase Fresnel Lens Based on Polymer Dispersed Liquid Crystal |
| title_fullStr | Electrically Tunable Binary-Phase Fresnel Lens Based on Polymer Dispersed Liquid Crystal |
| title_full_unstemmed | Electrically Tunable Binary-Phase Fresnel Lens Based on Polymer Dispersed Liquid Crystal |
| title_short | Electrically Tunable Binary-Phase Fresnel Lens Based on Polymer Dispersed Liquid Crystal |
| title_sort | electrically tunable binary phase fresnel lens based on polymer dispersed liquid crystal |
| topic | chiral molecules dopant, polymer dispersed liquid crystals, grating, polarization-independent |
| url | http://matsc.ktu.lt/index.php/MatSc/article/view/16317 |
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