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Featured researches published by Kunikazu Ohnishi.


IEEE Transactions on Consumer Electronics | 1999

Techniques for reading DVD-RAM disc with DVD-ROM drives

Katsuhiko Izumi; Kunikazu Ohnishi; Masayuki Inoue; Takeshi Shimano; Yasuyuki Sugi

We have developed techniques to read DVD-RAM discs with DVD-ROM drives. The key techniques are the reduction of feedthrough in the focusing error signal, the reduction of the push-pull signal offset, and the half tracking jump function.


Archive | 1994

Optical transmission and receiving module and optical communication system using the same

Kunikazu Ohnishi; Masayuki Inoue; Yoshio Suzuki; Yukio Fukui


Archive | 2000

Optical detector, optical pickup and optical information reproducing apparatus using optical pickup

Katsuhiko Izumi; Kunikazu Ohnishi; Kenichi Shimada; Masayuki Inoue; Shinji Fujita


Archive | 1999

Optical head including electrical circuit which produces focus error signal and tracking error signal unaffected by variations in intensity distributions of reflected light beams

Takeshi Shimano; Shigeru Nakamura; Kunikazu Ohnishi; Masayuki Inoue; Yukio Fukui


Archive | 1997

Optical pickup for optical disk apparatus

Kunikazu Ohnishi; Masayuki Inoue; Tohru Sasaki; Yukio Fukui; Takeshi Nakao; Takeshi Shimano


Archive | 2007

Optical pickup and optical information recording apparatus using the same

Kunikazu Ohnishi; Tomotro Kawamura; Masayuki Inoue


Archive | 1986

Method of recording and reproducing digital information and apparatus therefor

Masaji Ishigaki; Hideo Onuki; Yukio Fukui; Masayuki Inoue; Kunikazu Ohnishi


Archive | 2006

Optical pickup and optical disc drive

Kenichi Shimada; Kunikazu Ohnishi; Nobuhiro Konuma


Archive | 1987

Optical reproducing apparatus

Kunikazu Ohnishi; Akira Arimoto; Masayuki Inoue; Yukio Fukui


Archive | 2002

Information reproducing method

Takeshi Shimano; Shigeru Nakamura; Kunikazu Ohnishi; Masayuki Inoue; Yukio Fukui

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