Integral Videography element image acquisition method by optical system using a 0.25 pitch gradient index lens

Abstract

3D stereoscopic endoscope device was developed in endoscopic surgery. In this system, special glasses, which bother the surgeons, are needed. Thus, we proposed an Integral-Videography(IV)-based endoscope system. IV-based method is glasses-free for displaying 3D images. In this method, the reflecting light ray of an object is constructed by placing an IV element image on the focal plane of a lens array. In the previous constructing method of the IV element image from the stereo endoscope images, there is a time delay of the image composition. In this paper, principle of IV element image acquisition method was confirmed by an optical system using a 0.25 pitch gradient index(GRIN) lens. IV element image was created by getting the images corresponding to a single lens and placing the acquired images at the corresponding position. By observing the IV image, we observed that the proposed method can express the depth relationship of the object.