10 April 1996 Disparity and distortion-free stereoscopic fiberscope
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Abstract
Disparity was a critical problem for long time perception with a conventional stereoscopic endoscope such as laparoscope etc. The problem is fatigue. The disparity is defined as for only stereo pair except blurred images of them in this paper. We produced a new type endoscope which enabled both flexible and non-flexible type using SUS guide tube. The endoscope was disparity and distortion free concerning stereo perception. However stereoscopic images on our 3D system (STEREVIC) taken by stereoscopic fiberscope have slight mixing of right and left perception. It is considered that this crosstalk occurs during image transmission in fiber bundle, because our apparatus doesn't use polarized light maintain fiber, but ordinary image fiber. Furthermore, crevice between a pair of polarizers arranged in objective lens is considered one of the reasons for the outbreak of crosstalk, so that we propose a method to reduce the influence of crosstalk in our system. The system is composed of a GRIN lens, a pair of polarizers, image fiber bundle, light guide fiber, polarizing beam splitter, a pair of CCDs, a liner subtraction circuit and a stereoscopic liquid crystal display. The diameter of the fiberscope was 1.5 mm.
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Tomohiko Hattori, Tomohiko Hattori, Toshihisa Nakamura, Toshihisa Nakamura, Jun Suzuki, Jun Suzuki, Masaru Kurio, Masaru Kurio, Mitsutoshi Yaegashi, Mitsutoshi Yaegashi, Sadayuki Sakuma, Sadayuki Sakuma, "Disparity and distortion-free stereoscopic fiberscope", Proc. SPIE 2653, Stereoscopic Displays and Virtual Reality Systems III, (10 April 1996); doi: 10.1117/12.237419; https://doi.org/10.1117/12.237419
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