Ms. Saki Iwami Profile

Saki Iwami

at Hokkaido Univ

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Proceedings Article | 3 February 2009 Paper

A study of glasses-type color CGH using a color filter considering reduction of blurring

Saki Iwami, Yuji Sakamoto

Proceedings Volume 7233, 723317 (2009) https://doi.org/10.1117/12.808804

KEYWORDS: 3D image reconstruction, Holograms, Optical filters, Computer generated holography, Glasses, Image resolution, Holography, Current controlled current source, RGB color model, Image filtering

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We have developed a glasses-type color computer generated hologram (CGH) by using a color filter. The proposed glasses consist of two "lenses" made of overlapping holograms and color filters. The holograms, which are calculated to reconstruct images in each primary color, are divided to small areas, which we called cells, and superimposed on one hologram. In the same way, colors of the filter correspond to the hologram cells. We can configure it very simply without a complex optical system, and the configuration yields a small and light weight system suitable for glasses. When the cell is small enough, the colors are mixed and reconstructed color images are observed. In addition, color expression of reconstruction images improves, too. However, using small cells blurrs reconstructed images because of the following reasons: (1) interference between cells because of the correlation with the cells, and (2) reduction of resolution caused by the size of the cell hologram. We are investigating in order to make a hologram that has high resolution reconstructed color images without ghost images. In this paper, we discuss (1) the details of the proposed glasses-type color CGH, (2) appropriate cell size for an eye system, (3) effects of cell shape on the reconstructed images, and (4) a new method to reduce the blurring of the images.

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