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Proceedings Paper

New camera module with thin structure, high resolution, and capability of distance detection
Author(s): Michiyoshi Nagashima; Masa-aki Suzuki; Tsuguhiro Korenaga; Katsumi Imada; Satoshi Tamaki; Tomokuni Iijima; Ichiro Oyama; Taku Hirasawa; Tatsutoshi Suenaga; Masaki Tagome; Seiji Nishiwaki; Takashi Ishikawa; Aki Takai
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Paper Abstract

Our new type of camera module has a four-lens-array and an imaging sensor. The imaging sensor is divided to four regions, and these four regions are aligned in one-to-one correspondence with the four lenses. Four color filters are placed over the four imaging regions. First region has a blue filter, second has a red, and the other two have green filters, and two regions with green filters are aligned diagonally. Diffraction gratings are formed on aspheric surfaces of the four lenses, and MTF characteristics of these lenses are improved. The four images taken through the different lenses have parallax, but these parallaxes can be calculated by comparison of the two green images. Pixel shifts of blue, red and green images are realized by rotating the four-lens-array slightly with respect to the imaging sensor. After correcting the parallaxes, the green image, the parallax-corrected blue image and the parallax-corrected red image are composed to generate the resultant color image with high resolution. Distances between objects and the four-lens-array are detected by use of the above parallaxes, and measurement error is less than 2.5% for near objects. With above configuration and functions, our camera module has realized smaller height, higher image resolution and distance-detection capability, and will be applied for cellular phones and automobile vehicles.

Paper Details

Date Published: 21 April 2006
PDF: 8 pages
Proc. SPIE 6196, Photonics in Multimedia, 619609 (21 April 2006); doi: 10.1117/12.662261
Show Author Affiliations
Michiyoshi Nagashima, Matsushita Electric Industrial Co., Ltd. (Japan)
Masa-aki Suzuki, Matsushita Electric Industrial Co., Ltd. (Japan)
Tsuguhiro Korenaga, Matsushita Electric Industrial Co., Ltd. (Japan)
Katsumi Imada, Matsushita Electric Industrial Co., Ltd. (Japan)
Satoshi Tamaki, Matsushita Electric Industrial Co., Ltd. (Japan)
Tomokuni Iijima, Matsushita Electric Industrial Co., Ltd. (Japan)
Ichiro Oyama, Matsushita Electric Industrial Co., Ltd. (Japan)
Taku Hirasawa, Matsushita Electric Industrial Co., Ltd. (Japan)
Tatsutoshi Suenaga, Matsushita Electric Industrial Co., Ltd. (Japan)
Masaki Tagome, Matsushita Electric Industrial Co., Ltd. (Japan)
Seiji Nishiwaki, Matsushita Electric Industrial Co., Ltd. (Japan)
Takashi Ishikawa, Matsushita Electric Industrial Co., Ltd. (Japan)
Aki Takai, Matsushita Electric Industrial Co., Ltd. (Japan)


Published in SPIE Proceedings Vol. 6196:
Photonics in Multimedia
Ari Tervonen; Malgorzata Kujawinska; Wilbert IJzerman; Herbert De Smet, Editor(s)

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