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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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Author: search.filters.author.Chern, Jyh-LongSubject: search.filters.subject.optimization

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Now showing 1 - 4 of 4
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    Item type:Item,
    Application of global optimization to design of an aspheric pickup head for multiple wavelengths
    (2006-01-01)
    Tsao, Chao-Hsi
    ;
    Chern, Jyh-Long
    ;
    光電工程學系
    ;
    Department of Photonics
    An optimization process combining of global optimization algorithm and further optimization treatment is proposed and demonstrated with application to the objective lenses of multiple-wavelength configurations. Based on the optimal variable set of aspheric coefficients obtained by the proposed global optimization strategy, singlet objective lens for different operational configurations, i.e., for CD and DVD, and for DVD and HDDVD, can be deduced.
  • Thumbnail Image
    Item type:Item,
    Application of global optimization to design of an aspheric pickup head for multiple wavelengths - art. no. 63422G
    (2006)
    Tsao, Chao-Hsi
    ;
    Chern, Jyh-Long
    ;
    光電工程學系
    ;
    Department of Photonics
    An optimization process combining of global optimization algorithm and further optimization treatment is proposed and demonstrated with application to the objective lenses of multiple-wavelength configurations. Based on the optimal variable set of aspheric coefficients obtained by the proposed global optimization strategy, singlet objective lens for different operational configurations, i.e., for CD and DVD, and for DVD and HDDVD, can be deduced.
  • Thumbnail Image
    Item type:Item,
    Application of a global optimization process to the design of pickup heads for compact and digital versatile disks
    (2006-10-01)
    Tsao, Chao-Hsi
    ;
    Chern, Jyh-Long
    ;
    光電工程學系
    ;
    Department of Photonics
    A global optimization process is developed for designing an objective lens for multiple-configuration applications. As a demonstration, it is shown that diffraction-limit performance can be achieved for a pickup head used for both compact disks (wavelength 780 nm) and digital versatile disks (wavelength range 635 to 650 nm) with different working distances and focal lengths, at a numerical aperture of 0.6. (c) 2006 Society of Photo-Optical Instrumentation Engineers.
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    Item type:Item,
    Zoom lens design of mobilephone camera with global-explorer optimization - art. no. 66680P
    (2007)
    Hung, Chao-Yu
    ;
    Chern, Jyh-Long
    ;
    光電工程學系
    ;
    Department of Photonics
    Unlike the designs of common zoom lenses in literature, mobilephone applications demand an extremely short total track length (TTL), less around 10 mm. This short TTL request makes the zoom lens design of mobile phones unique. Also in viewing the cost advantage of CMOS sensor, we explore the mobilephone camera zoom lens with typical CMOS sensor format by global explorer (GE) optimization as well as the fundamental limitations. The basic lens forms for initial designs are deduced. Physically different merit functions have been developed to investigate how the best performance could be achieved. Furthermore, we also identify the improvements that could be achieved by GE optimization.