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18 March 1998 Holographic stereovision system with multiple focuses
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Proceedings Volume 3293, Practical Holography XII; (1998)
Event: Photonics West '98 Electronic Imaging, 1998, San Jose, CA, United States
This report is concerned with a stereovision system using holographic optical element (HOE). The authors introduce a natural 3D display system that provides the observer the clear stereoscopic vision without glasses. Even though both eyes of the observer are arbitrary located at the focuses of the stereovision system, he can be satisfied to look at the suitable 3D images. It is important that the focuses are not restricted at the specific points but occupy more broad areas. Such a mechanism is realized by the method of exposing with the diffractive plate. Moreover the authors are interested in a deep stereovision system. The system with four focuses is described to provide the adequate focuses in the accordance with his distance from the object. This system has HOE of multiple focuses that makes two pairs of viewing points in the back and forth locations. In this system four original images are projected from the behind of the HOE. All images join at the HOE and advance for the schemed focuses.
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Masaaki Okamoto, Koji Yamasaki, and Eiji Shimizu "Holographic stereovision system with multiple focuses", Proc. SPIE 3293, Practical Holography XII, (18 March 1998);

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