7 June 2004 A new sensor alignment method for an 8k x 4k-pixel ultrahigh definition camera with four imagers
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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.
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Takayuki Yamashita, Takayuki Yamashita, Kohji Mitani, Kohji Mitani, Hiroshi Shimamoto, Hiroshi Shimamoto, Miho Shirakawa, Miho Shirakawa, Fumio Okano, Fumio Okano, "A new sensor alignment method for an 8k x 4k-pixel ultrahigh definition camera with four imagers", Proc. SPIE 5301, Sensors and Camera Systems for Scientific, Industrial, and Digital Photography Applications V, (7 June 2004); doi: 10.1117/12.526609; https://doi.org/10.1117/12.526609
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