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    National Tsing Hua University Institutional Repository > 原子科學院  > 工程與系統科學系 > 會議論文  >  MODIFY 2D GRADIENT-ELECTROSTATIC-FORCES TO MANIPULATE MICRO-ASPHERICAL LENS FOR SMALL FORM FACTOR DVD PICKUP HEAD


    Please use this identifier to cite or link to this item: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/47215


    Title: MODIFY 2D GRADIENT-ELECTROSTATIC-FORCES TO MANIPULATE MICRO-ASPHERICAL LENS FOR SMALL FORM FACTOR DVD PICKUP HEAD
    Authors: K. Y. Hung1, T. H. Liang1, F. G. Tseng2, 3, and C. T. Chen
    教師: 曾繁根
    Date: 2007
    Relation: Solid-State Sensors, Actuators and Microsystems Conference, 2007. TRANSDUCERS 2007. International, Lyon, 10-14 June 2007, Pages 2569-2572
    Keywords: aspherical optics
    curing
    digital versatile discs
    microlenses
    optical design techniques
    optical fabrication
    optical polymers
    surface tension
    Abstract: This paper proposes a novel design concept and fabrication method of micro aspherical lens for DVD head. Gradient-Electrostatic-Forces (GEF) were employed to shape liquid polymer from hemisphere into parabolic or near cone shape, and the shape can be fixed by a UV curing process in situ while surface tension force in the edge of microlens is far bigger than electrostatic force. As a result, the lens focused light spot size (by red light 632.8nm) was reduced from 2.302 μm into 0.778 μm, suitable for the need of objective lenses with high numerical apertures and resolution. Very high quality focus effects and 0.66 NA were obtained at an optimized shape of the GEF lens, which is compatible to those of the commercial DVD objective lens
    URI: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/47215
    Appears in Collections:[工程與系統科學系] 會議論文

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