Title: Design of a bi-directional illumination system for a dual view capsule endoscope
Authors: Sheu, Ming-Jen
Liu, Ying-Lan
Wang, Jhi-Joung
Pan, Jui-Wen
光電系統研究所
影像與生醫光電研究所
Institute of Photonic System
Institute of Imaging and Biomedical Photonics
Keywords: Optical systems design;illumination design;capsule endoscope
Issue Date: 6-Feb-2019
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.
URI: http://dx.doi.org/10.1080/09500340.2018.1516829
http://hdl.handle.net/11536/148556
ISSN: 0950-0340
DOI: 10.1080/09500340.2018.1516829
Journal: JOURNAL OF MODERN OPTICS
Volume: 66
Begin Page: 252
End Page: 262
Appears in Collections:Articles