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Yuya Kawasaki

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Proceedings Article | 1 June 2020 Paper

An approach to the multiplex reconstructing process for spatially multiplex projected holographic colored images using blue-violet laser light

Kunihiko Takano, Kazuki Audo, Yuya Kawasaki, Miyu Osaka, Koki Sato, Kikuo Asai

Proceedings Volume 11515, 115152P (2020) https://doi.org/10.1117/12.2566532

KEYWORDS: 3D image reconstruction, Image processing, Holography, Holograms, Computer generated holography, Image quality, Image restoration, Digital Light Processing, 3D image processing, Laser applications

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In order to display holographic reconstructed images in colors, we must sufficiently study the characteristics of the images reconstructed by multiplex reconstructing process and spatially multiplex holographic projecting process using blue-violet laser light. But in general, in the reconstruction of the images, if we use the laser lights of the short wave length, their reconstruction seems to be more difficult. Moreover, as for the reconstruction adopted blue-violet color laser light, it seems to have been not reported so many results. For this, we study first the relation between the number of the points of the object and the reconstructed image quality by applying multiplex reconstructing process adopted blue-violet laser light. Next, we study a basic coloring process by applying spatially multiplex holographic projecting technique using blue violet laser light. In this paper, we shall report how effectively the holographic image reconstruction adopted blue-violet laser light (wavelength: 405nm) plays its role to present the image of high quality through time-sharing multiplex reconstruction and to enlarge color region of the reconstructed image through time-sharing spatially multiplex holographic projection.. In addition, we studied a process which produces, by time-sharing spatially multiplex projection on the screen, the two colored images by time-sharing multiplex reconstructing technique using two color lasers: blue-violet, red (or green). As this result, we have confirmed that single color multiplex reconstructing process, which recovers the divided parts of the objects formed with multiple points, is also applicable to time-sharing spatially multiplex reproducing process using two colors. This seems to suggest some possibility of the color region enlargement of the recovered holographic images.

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