標題: Improving the uniformity of luminous system in radial imaging capsule endoscope system
作者: Mang Ou-Yang
Jeng, Wei-De
資訊工程學系
電機資訊學士班
Department of Computer Science
Undergraduate Honors Program of Electrical Engineering and Computer Science
關鍵字: radial imaging capsule endoscope;illumination system;light uniformity;optimal design
公開日期: 1-二月-2013
摘要: This study concerns the illumination system in a radial imaging capsule endoscope (RICE). Uniformly illuminating the object is difficult because the intensity of the light from the light emitting diodes (LEDs) varies with angular displacement. When light is emitted from the surface of the LED, it first encounters the cone mirror, from which it is reflected, before directly passing through the lenses and complementary metal oxide semiconductor (CMOS) sensor. The light that is strongly reflected from the transparent view window (TVW) propagates again to the cone mirror, to be reflected and to pass through the lenses and CMOS sensor. The above two phenomena cause overblooming on the image plane. Overblooming causes nonuniform illumination on the image plane and consequently reduced image quality. In this work, optical design software was utilized to construct a photometric model for the optimal design of the LED illumination system. Based on the original RICE model, this paper proposes an optimal design to improve the uniformity of the illumination. The illumination uniformity in the RICE is increased from its original value of 0.128 to 0.69, greatly improving light uniformity. (C) The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI. [DOI: 10.1117/1.OE.52.2.023003]
URI: http://dx.doi.org/10.1117/1.OE.52.2.023003
http://hdl.handle.net/11536/21240
ISSN: 0091-3286
DOI: 10.1117/1.OE.52.2.023003
期刊: OPTICAL ENGINEERING
Volume: 52
Issue: 2
結束頁: 
顯示於類別:期刊論文


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  1. 000315154800020.pdf