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    Title: Design of a bi-directional illumination system for a dual view capsule endoscope
    Authors: Ming-Jen Sheu(許銘仁)
    Liu, Ying-Lan
    Wang, Jhi-Joung
    Pan, Jui-Wen
    Contributors: Chi Mei Med Ctr, Div Gastroenterol & Hepatol
    Chia Nan Univ Pharm & Sci, Dept Med Chem
    Natl Chiao Tung Univ, Inst Imaging & Biomed Photon
    Chi Mei Med Ctr, Dept Med Res
    Natl Chiao Tung Univ, Inst Photon Syst
    Keywords: Optical systems design
    illumination design
    capsule endoscope
    Date: 2019-02
    Issue Date: 2020-07-29 13:52:39 (UTC+8)
    Publisher: TAYLOR & FRANCIS LTD
    Abstract: The capsule endoscope is an important tool for the intestinal examination. But the main disadvantage of the traditional capsule endoscope is the limited field of view. In order to solve this problem, the dual view capsule endoscope (DVCE) was developed. In this work, a dual view illumination system is designed for a DVCE. The dual view illumination system is divided into two sub-systems with a front view illumination lens and a back view illumination lens. The Bezier curves for the front view and back view illumination lenses are used for optimization, based on which we change the radiation pattern of the LED so that the dual view illumination design can support energy for the front view and back view simultaneously while achieving low power consumption and high efficiency. Moreover, a non-uniform illumination process is used to compensate for the problem of uniformity and relative illumination for the DVCE lens. Through this design, we can obtain a uniformity of 91% and an efficiency of 25.2% for front view illumination and uniformity of 91% and an efficiency of 23.5% for back view illumination. Finally, tolerance analysis can also be completed for mass production.
    Relation: Journal of Modern Optics, v.66, n.3, pp.252-262
    Appears in Collections:[Dept. of Medicinal Chemistry] Periodical Articles

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