標題: Dual view capsule endoscopic lens design
作者: Sheu, Ming-Jen
Chiang, Che-Wen
Sun, Wen-Shing
Wang, Jhi-Joung
Pan, Jui-Wen
光電系統研究所
影像與生醫光電研究所
生醫電子轉譯研究中心
Institute of Photonic System
Institute of Imaging and Biomedical Photonics
Biomedical Electronics Translational Research Center
公開日期: 6-四月-2015
摘要: A dual view capsule endoscopic (DVCE) lens is proposed with front view and back view functions. This is a hybrid lens with a catadioptric mirror and an aspherical surface to support both view functions. The field of view (FOV) for the front view function is 90 degrees. The FOV for the back view function is 260 to 290 degrees. The TV distortion for the front view and back view function is under 30% and 25%. The corner relative illuminations for the two view functions are above 0.53. The Modulation Transfer Function (MTF) performance at the Nyquist Frequency for the two view functions can be kept above 0.35, even under tolerance they can remain above 0.2. Moreover, the telecentric conditions at the image plane of the DVCE system can support constant magnification through focusing. This condition can reduce the measurement error by slightly defocusing of the lens. Thus, the two view functions can offer physicians a wide viewing angle to deal with lesions over the fold. (C)2014 Optical Society of America
URI: http://dx.doi.org/10.1364/OE.23.008565
http://hdl.handle.net/11536/124682
ISSN: 1094-4087
DOI: 10.1364/OE.23.008565
期刊: OPTICS EXPRESS
Volume: 23
起始頁: 8565
結束頁: 8575
顯示於類別:期刊論文