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收集所有交通大學研究人員與學生個人或團體所發表之各項學術著作，涵蓋期刊論文、教師專書、學位論文等項。;;Collections of Publications of NCTU Researchers and Students Like Journal Papers and Thesis.

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Subject: search.filters.subject.Fresnel lens

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Now showing 1 - 6 of 6
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    全像術成像系統與非對稱菲涅爾鏡片的光學設計平台之研發(I)
    (2004)
    陳志隆
    ;
    CHERN JYH-LONG
    ;
    交通大學光電工程研究所
    這個計畫有兩個課題，一在發展全像術成像的設計平台，可以進行最佳化與公差容忍度分析，委外製作全像片，再加以實驗驗證，以確認設計平台的可信度。另一個研發課題是發展非對稱菲涅爾鏡片(hybrid Fresnel lens)的設計平台，可以進行最佳化與公差容忍度分析，並委外製作鏡片，再加以實驗驗證，以確認設計平台的可信度。
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    Blue Phase LC/Polymer Fresnel Lens Fabricated by Holographics
    (2014-02-01)
    Tan, Jian
    ;
    Song, Yue
    ;
    Zhu, Ji-Liang
    ;
    Ni, Shui-Bin
    ;
    Wang, Yi-Jun
    A novel fabrication method using holographic exposure for switchable blue phase (BP) liquid crystal (LC)/polymer Fresnel lens was demonstrated. The Fresnel pattern can be achieved by interfering a planar and a spherical wave fronts with a 532-nm laser. The BPLC/polymer Fresnel lens can thus be fabricated without photo mask and controlled with a simpler driving compared with the conventional LC Fresnel lens.
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    Fabrication of fresnel lens by glass molding technique
    (2013-03-01)
    Huang, Chien-Yao
    ;
    Chen, Chun-Chieh
    ;
    Chou, Hsiao-Yu
    ;
    Chou, Chang-Pin
    ;
    機械工程學系
    In this paper, we describe the fabrication of a Fresnel lens with a diameter of 15mm by a glass molding technique. Tungsten carbide and K-CSK120 were used as the materials of the mold and lens, respectively. The optimal parameters determined for the molding process included a molding temperature of 560 A degrees C, a molding force of 300 N, a temperature holding time of 180 s, and a cooling rate of 18.5 A degrees C/min.
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    Superzone Fresnel Liquid Crystal Lens for Temporal Scanning Auto-Stereoscopic Display
    (2012-11-01)
    Huang, Yi-Pai
    ;
    Chen, Chih-Wei
    ;
    Huang, Yi-Ching
    ;
    光電工程學系
    ;
    Department of Photonics
    The fast response superzone Fresnel liquid crystal (LC) lens with multiple transparent electrodes was proposed for temporal scanning auto-stereoscopic display. The experimental results indicated that the superzone Fresnel LC lens not only performed fast switching time (similar to 0.2 s), but also had the benefit of low driving voltage (similar to 5 V-rms). A 4-inch 2D/3D switchable auto-stereoscopic display with superzone Fresnel LC lens was further demonstrated. Finally, by driving the multiple electrodes alternatively, the superzone Fresnel LC lens array could be moved on horizontal direction for increasing the resolution of auto-stereoscopic display.
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    High concentration and homogenized Fresnel lens without secondary optics element
    (2011-09-01)
    Pan, Jui-Wen
    ;
    Huang, Jiun-Yang
    ;
    Wang, Chih-Ming
    ;
    Hong, Hwen-Fen
    ;
    Liang, Yi-Ping
    In this paper, we design a single concentrator to homogenize and concentrate the solar energy. The proposed concentrator only consisted of an array of refraction prisms. In order to homogenize the irradiance, all pitches of the Fresnel concentrator focus on the different position of the receiver. Finally, the Fresnel lens that achieves the uniformity of U is 14.6. An acceptance angle of 0.305 degrees is achieved without using additional secondary optics. Full Width at Half Maximum (FWHM) of illumination distribution is 1.4 mm. (C) 2011 Elsevier B.V. All rights reserved.
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    Ultrasonic vibration-assisted optical glass hot embossing process
    (2012-06-01)
    Tsai, Yen-Pin
    ;
    Hung, Jung-Chung
    ;
    Yin, Li-Chao
    ;
    Hung, Chinghua
    ;
    機械工程學系
    A homemade apparatus was used to apply ultrasonic-vibration to assist the glass hot embossing processes. To operate at high temperatures for glass hot embossing, the ultrasonic vibration system was appropriately designed with an embedded cooling system, and an ultrasonic horn was specifically modified for high-temperature use. Molds with both V-groove and Fresnel structures were manufactured for hot embossing experiments on PSK-100 glass. The heights of the molded structures were increased significantly with the assistance of ultrasonic vibration. This technology demonstrates the capability to upgrade the performance of the glass hot embossing process.