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Dr. Haruki Tokumaru
at NHK Science and Technical Research Labs
SPIE Involvement:
Author
Publications (5)
Proceedings Article | 18 June 2004 Paper
Waveguide of amorphous perfluoropolymer for visible light
Kentaro Sasaki, Norikazu Kawamura, Haruki Tokumaru, Shoichi Nakamura, Yoshihiko Sakane
Proceedings Volume 5351, (2004) https://doi.org/10.1117/12.528760
KEYWORDS: Waveguides, Light wave propagation, Refractive index, Visible radiation, Polymers, Cladding, Polymer multimode waveguides, Rayleigh scattering, Interfaces, Optical recording
Proceedings Article | 10 January 2002 Paper
PRML channel for a high-transfer-rate optical disk
Masahiko Kishida, Kyohiko Ishikawa, Koji Kamijo, Haruki Tokumaru, Haruo Okuda
Proceedings Volume 4342, (2002) https://doi.org/10.1117/12.453407
KEYWORDS: Optical discs, Signal to noise ratio, Signal detection, Fourier transforms, Filtering (signal processing), Cameras, Digital filtering, Distortion, Imaging systems, Televisions
Proceedings Article | 18 September 2000 Paper
Multibeam light source using optical waveguide for optical recording
Hideyo Okumura, Kiyotaka Arai, Norikazu Kawamura, Haruki Tokumaru, Haruo Okuda
Proceedings Volume 4090, (2000) https://doi.org/10.1117/12.399343
KEYWORDS: Waveguides, Light sources, Head, Optical recording, Light wave propagation, Optical fibers, Optical tracking, Diffraction, Optical components, Optical arrays
Proceedings Article | 28 June 1999 Paper
Improvement of performance of a tracking servo system for an optical disk drive
Kiyotaka Arai, Hideyo Okumura, Haruki Tokumaru, Kiyoshi Ohishi
Proceedings Volume 3864, 38641G (1999) https://doi.org/10.1117/12.997593
KEYWORDS: Optical storage, Scientific research, Servomechanisms, Control systems, Feedback control, Optical tracking, Optical discs, Actuators, Tolerancing, Device simulation
Proceedings Article | 8 September 1995 Paper
New tracking method using crosstalk signals for an optical tape recording system
Proceedings Volume 2514, (1995) https://doi.org/10.1117/12.218716
KEYWORDS: Signal detection, Optical tracking, Optical tapes, Servomechanisms, Head, Signal generators, Data storage, Interference (communication), Flat glass, Televisions
Conference Committee Involvement (1)
ISOM/ODS
14 July 2008 | Waikoloa, Hawaii, United States
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