Hisashi Senga
Panasonic
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Publication
Featured researches published by Hisashi Senga.
Japanese Journal of Applied Physics | 2002
Hisashi Senga; Takahiro Kubo; Takeo Ohta; Katsuya Watanabe; Tetsuya Shihara; Takashi Ishida; Shigetoshi Kunieda; Suk-Chun Lee; Mineo Sudo
We developed a testing method to determine the influence of dust adhesion on digital versatile disk (DVD). First, the dust testing system was developed. This system can control the dust density with an accuracy of ±20%. Second, the dust testing method was investigated. Reflectivity and jitter deteriorated gradually, making it easy to estimate the readability and lifetime of DVD. The system, testing procedure, and estimation indexes are adequate for the DVD dust test. Dust adhesion was observed. Dust particles adhere along the airflow direction and accumulate to 100 µm thickness. Third, in order to discuss the difference in readability between disks of 0.6 mm and 1.2 mm substrate thicknesses, the dust test was performed for DVD and compact disk (CD). It was found that the normalized reflectivity of DVD is 7% smaller than that of CD after 100 h exposure.
Archive | 2001
Mamoru Shoji; Atsushi Nakamura; Takashi Ishida; Hinromichi Ishibashi; Harumitsu Miyashita; Hisashi Senga; Rie Takahashi
Archive | 2002
Kenichi Kasazumi; Yasuo Kitaoka; T. Yokoyama; Kiminori Mizuuchi; Kazuhisa Yamamoto; Hisashi Senga; Shigeru Furumiya; Hiromichi Ishibashi
Archive | 2008
Hisashi Senga; Hiromichi Ishibashi; Kenzo Ishibashi; Haruhiko Mizuno
Archive | 2003
Hiromichi Ishibashi; Tetsuya Shihara; Hisashi Senga; Toshio Matsumoto
Archive | 2004
Hisashi Senga; Toshio Matsumoto; Hiromichi Ishibashi
Archive | 2004
Hisashi Senga; Hiromichi Ishibashi; Shigeru Furumiya; Kenichi Kasazumi
Archive | 2004
Hisashi Senga; Hiromichi Ishibashi; Toshio Matsumoto
Archive | 2006
Kenzo Ishibashi; Hisashi Senga; Takeharu Yamamoto
Archive | 2004
Toshio Matsumoto; Hisashi Senga
