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Proceedings Paper

A new sensor alignment method for an 8k x 4k-pixel ultrahigh definition camera with four imagers
Author(s): Takayuki Yamashita; Kohji Mitani; Hiroshi Shimamoto; Miho Shirakawa; Fumio Okano
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Paper Abstract

We describe a precise alignment method of attaching imagers to a prism to produce an ultra-high definition color camera system. We have already developed a prototype camera with 4-k scanning lines using this alignment method. To increase its spatial resolution, this camera has four 8-megapixel imagers (GGBR), which are attached to a prism with a half-pixel pitch offset so that their pixel arrangement is equivalent to that of a single-chip color-imaging sensor with a Bayer-pattern color filter. The precision of their positioning influences the resolution of the reproduced images. The small pixels in the latest imager make it more difficult to maintain precise imager positions. A precise alignment method for attaching imagers to prism is therefore essential for developing a camera system with high resolution. We propose a method with high detectivity using a sinusoidal pattern chart that easily reproduced by one imager, and a signal process. Images from this camera can attain a limiting resolution of more than 3200 TV lines.

Paper Details

Date Published: 7 June 2004
PDF: 11 pages
Proc. SPIE 5301, Sensors and Camera Systems for Scientific, Industrial, and Digital Photography Applications V, (7 June 2004); doi: 10.1117/12.526609
Show Author Affiliations
Takayuki Yamashita, NHK Science and Technical Research Labs. (Japan)
Kohji Mitani, NHK Science and Technical Research Labs. (Japan)
Hiroshi Shimamoto, NHK Science and Technical Research Labs. (Japan)
Miho Shirakawa, NHK Science and Technical Research Labs. (Japan)
Fumio Okano, NHK Science and Technical Research Labs. (Japan)


Published in SPIE Proceedings Vol. 5301:
Sensors and Camera Systems for Scientific, Industrial, and Digital Photography Applications V
Nitin Sampat; Morley M. Blouke; Ricardo J. Motta, Editor(s)

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