The apparatus and methods herein provide quantitatively controllable light sources and expanded dynamic range endoscopy systems that can improve the quality of images and the ability of users to distinguish desired features when viewing tissues by providing methods and apparatus that improve the dynamic...http://www.google.com.tw/patents/US7544163?utm_source=gb-gplus-share專利 US7544163 - Apparatus and methods relating to expanded dynamic range imaging endoscope systems