Tadashi Minobe
Mitsubishi Electric
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Publication
Featured researches published by Tadashi Minobe.
Optics Express | 2012
Hiroyuki Kawano; Tatsuki Okamoto; Taku Matsuzawa; Hajime Nakajima; Junko Makita; Naoyuki Fujiyama; Eiji Niikura; Tatsuya Kunieda; Tadashi Minobe
A compact image scanner is designed by using a compound eye system with plural optical units in which a ray path is folded by reflective optics. The optical units are aligned in two lines and take each image of a separated field of view (FOV), slightly overlapped. Since the optical units are telecentric in the object space and the magnification ratio is constant regardless of the object distance, the separated pieces of a total image are easily combined with each other even in the defocused position. Since the optical axes between adjacent optical units are crossed obliquely, object distance is derived from the parallax at each boundary position and an adequate deblurring process is achieved for the defocused image.
Optics Express | 2014
Hiroyuki Kawano; Tatsuki Okamoto; Hajime Nakajima; Shigeru Takushima; Yoshitaka Toyoda; Satoshi Yamanaka; Tetsuo Funakura; Kosaku Yamagata; Taku Matsuzawa; Tatsuya Kunieda; Tadashi Minobe
We designed a new image scanner using the reflective optics of a compound eye system that can easily assemble plural imaging optical units (called imaging cells) and is compact with a large depth of field (DOF). Our image scanner is constructed from 32 reflective imaging cells, each of which takes an image of approximately a 10-mm field of view (FOV) that slightly overlap the adjacent imaging cells. The total image is rebuilt by combining the 32 images in post processing. We studied how to fold the optical path in the imaging cells and simplified the structure, resulting in the following three advances of our previous work: 1) greater compactness (50 × 31 mm2 in the cross section), 2) less variable optical characteristics among the imaging cells, and 3) easy assembly thanks to small number of optical components constructing the imaging cell.
The Journal of The Institute of Image Information and Television Engineers | 2004
Tetsuya Kuno; Hiroaki Sugiura; Tadashi Minobe; Hiroyuki Miyake
We have developed optical-adjustment-free camera modules for mobile phones. Because of the currentboom in mobile phones with built-in cameras, easy camera assembly to speed unit output is important. Adjustment-free manufacturing helps camera module assembly makers deliver mass products with short turnovertime. In particular, focus-adjustment-free cameras can be made smaller and task time speeded up. We have examined the trade off between resolution and optical focal depth for mobile phones. And we have developed a new structure for camera modules that has an optical system set on the CMOS sensor to minimize the margin of error in assembly.
Archive | 2009
Tadashi Minobe; Takahito Nakanishi; Seiichi Matsumura; Tetsuo Funakura; Hiroyuki Kawano; Tatsuki Okamoto; Taku Matsuzawa; Yasunori Matsumoto
Archive | 2000
Tetsuya Kuno; Tadashi Minobe; Hiroyuki Miyake; Hiroaki Sugiura; Nobuo Ueda; Norihiro Watanabe; 博之 三宅; 徹也 久野; 博明 杉浦; 信夫 植田; 教弘 渡辺; 正 美濃部
Archive | 2014
Taku Matsuzawa; Kosaku Yamagata; Tadashi Minobe; Yasuhiro Nakamura; Hiroyuki Kawano
Optical Review | 2013
Hiroyuki Kawano; Tatsuki Okamoto; Taku Matsuzawa; Hajime Nakajima; Junko Makita; Yoshitaka Toyoda; Tetsuo Funakura; Takahito Nakanishi; Tatsuya Kunieda; Tadashi Minobe
Archive | 2012
Tatsuki Okamoto; Taku Matsuzawa; Tadashi Minobe; Takahito Nakanishi
Archive | 2012
Miki Kagano; Kazuya Makabe; Tomokazu Ogomi; Takahito Nakanishi; Tadashi Minobe; Takashi Ito
Archive | 2000
Tetsuya Kuno; Tadashi Minobe; Hiroyuki Miyake; Hiroaki Sugiura; Nobuo Ueda; 博之 三宅; 徹也 久野; 博明 杉浦; 信夫 植田; 正 美濃部