Mr. Tomohiro Nakamura Profile

Tomohiro Nakamura

at Japan Broadcasting Corporation (NHK)

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Proceedings Article | 22 May 2015 Paper

Compact integral three-dimensional imaging device

J. Arai, T. Yamashita, H. Hiura, M. Miura, R. Funatsu, T. Nakamura, E. Nakasu

Proceedings Volume 9495, 94950I (2015) https://doi.org/10.1117/12.2182658

KEYWORDS: 3D image processing, Imaging devices, 3D displays, Image sensors, Stereoscopy, Image resolution, Imaging arrays, Cameras, CMOS sensors, Integral imaging

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A compact integral three-dimensional (3D) imaging device for capturing high resolution 3D images has been developed that positions the lens array and image sensor close together. Unlike the conventional scheme, where a camera lens is used to project the elemental images generated by the lens array onto the image sensor, the developed device combines the lens array and image sensor into one unit and makes no use of a camera lens. In order to capture high resolution 3D images, a high resolution imaging sensor and a lens array composed of many elemental lenses are required, and in an experimental setup, a CMOS image sensor circuit patterned with multiple exposures and a multiple lens array were used. Two types of optics were implemented for controlling the depth of 3D images. The first type was a convex lens that is suitable for compressing a relatively large object space, and the second was an afocal lens array that is suitable for capturing a relatively small object space without depth distortion. The objects captured with the imaging device and depth control optics were reconstructed as 3D images by using display equipment consisting of a liquid crystal panel and a lens array. The reconstructed images were found to have appropriate motion parallax.

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