Hitachi, Ltd.

Hitachi Maxell, Limited

Other

Lumentum Japan, Inc.

Hitachi High-tech Corporation

Maxell, Ltd.

Nippon Columbia Co., Ltd.

Tetsuya Nishida

Motoyasu Terao

Makoto Miyamoto

Yumiko Anzai

Keikichi Andoo

Akemi Hirotsune

Junko Ushiyama

Tsuyoshi Toda

Hideki Saga

Yasushi Miyauchi

Masatoshi Ohtake

Shinkichi Horigome

Norio Ohta

Hiroshi Yasuoka

Harukazu Miyamoto

Takeshi Maeda

Hisataka Sugiyama

Kiyoshi Matsumoto

Shigenori Okamine

Masahiro Ojima

Nobuhiro Tokushuku

Yukio Fukui

Keikichi Ando

Koji Hirata

Hiroyuki Minemura

Shigeru Nakamura

Mitsuhide Miyamoto

Atsushi Nakamura

Kazuo Shigematsu

Nobuyuki Kimura

Hidehiro Ikeda

Naoyuki Kofuji

Yasushi Sakuma

Jiro Yamamoto

Akira Gotoh

Kaoru Okamoto

Shigetaka Hamada

Ryosuke Nakajima

Shuhei Nakamichi

Masatoshi Arasawa

Koichi Moritani

Ryo Suzuki

Tadashi Ikeda

Toshimitsu Kaku

Kenchi Ito

Yoshito Tsunoda

Masahiko Takahashi

Fumio Isshiki

Reiji Tamura

Sakiko Narikawa

Takehiko Yorozu

Yoshihiro Ikari

Keiichi Kobayashi

Yasuhiro Ohta

Kazuhiko Nakano

Takayuki Noda

Norio Murase

Mokoto Miyamoto

Hisae Wakabayashi

Mari Ichikawa

Hisae Sasaki

An analysis device according to the present disclosure, which obtains data about a sample, is characterized by comprising: a placement unit on which the sample is placed; a data obtaining unit which obtains data about the sample; a user interface unit which allows a user to make access to processing of the analysis device; a communication unit which communicates with an online authentication unit that authenticates the user online; an offline authentication unit which authenticates the user offline when the communication unit cannot communicate with the online authentication unit; and a restriction unit which restricts the processing accessible to the user when the user is authenticated by the offline authentication unit as compared to when the user is authenticated by the online authentication unit.

Analysis device and authentication method

A semiconductor optical amplifier integrated laser includes a semiconductor laser oscillator portion that oscillates laser light having a wavelength included in a gain band and a semiconductor optical amplifier portion that amplifies laser light output from the semiconductor laser oscillator portion. The semiconductor laser oscillator portion and the semiconductor optical amplifier portion have one common p-i-n structure, the common p-i-n structure includes an active layer, a cladding layer provided apart from the active layer, and a common functional layer formed in the cladding layer, and the common functional layer includes a first portion that reflects light having a wavelength within the gain band in the semiconductor laser oscillator portion and a second portion that transmits light having a wavelength within the gain band in the semiconductor optical amplifier portion.

Semiconductor optical amplifier integrated laser

In order to improve a characteristic of an optical element, an optical element (polarizing filter) including a substrateS having a wire-grid regionA and a peripheral regionA positioned on an outer periphery thereof is made to have the following configuration. A wire-grid in which a plurality of line-shaped wires Pmade of Al and extending in a y direction are arranged at spaces S in an x direction is provided in the wire-grid regionA of the substrateS, and a pattern (repetitive pattern) in which a plurality of protruding portions Pmade of Al are arranged is provided in the peripheral regionA. This pattern is, for example, a checkerboard pattern. According to the above-mentioned configuration, the plurality of wires Pcan be arranged so that their respective ends are spaced apart from an end of the substrateS, so that the wires Pcan be prevented from being deformed and nicked. Also, by the plurality of protruding portions Pin the peripheral regionA, it is possible to prevent water from entering the wire-grid regionA.

Optical element, manufacturing method of optical element, and optical device

Provided are an optical element and an optical device using the optical element to which a manufacturing process for manufacturing a wire-grid structure can be basically applied, and besides, in which a higher polarization contrast ratio than that of a wire-grid element can be obtained. A wobbled wire element in an embodiment has a feature that a periodic structure having a period equal to or larger than a wavelength of an incident light wave is formed in a y direction. In this manner, in a wobbled wire element in a first embodiment, a polarization contrast ratio can be significantly improved.

Optical element and optical device

A recording medium including a plurality of recording layers, including: an optional first recording layer on which a light spot at a diffraction limit is formed; and a second recording layer on which a mark string pattern is formed, said second recording layer being different from said first recording layer, wherein when said mark string pattern is formed on a light receiving plane, while information of said first recording layer is reproduced, assuming that an optical distance between said first and second recording layers is dm, an optical distance d between optional two recording layers among a plurality of said recording layers is different from said dm.

Three-dimensional recording and reproducing apparatus

Recording information is disclosed in which an information recording medium is irradiated with a recording energy beam that is power-modulated into at least a record power level and a record-ready power level lower than the record power level. The information is recorded on the recording medium in the form of length and interval of a mark portion. When forming a mark portion of a predetermined length, the radiation energy of the energy beam is increased as compared with when forming a mark portion of a different length before or after the first pulse of an energy beam pulse train including at least a pulse for forming the mark portion.

Information recording method and apparatus with suppressed mark edge jitters

In a three-dimensional recording and reproducing apparatus having a recording medium including a plurality of recording layers stacked on a substrate and an optical system for converging a light irradiated from the substrate side on each of the plurality of recording layers to three-dimensionally record and reproduce information, the following equation is satisfied:&#x3bb;/4&#x2266;(1/8)(1/&#x2212;1)where A light spot is focused on each layer of the multi-layer structured disc to record and reproduce highly reliable data in a high density.

A high recording-density and highly reliable optical disc according to the two-dimensional PRML system is provided in which periodic signal fluctuations in the readout signal caused by an overall positional displacement of pits between adjacent tracks can be detected at each sampling clock timing and can be tracked and compensated. Two-dimensional inter-symbol interference is compensated during the production and recording of the pattern of the medium. The readout signal is compensated by a process of multi-value tracking before symbols are extracted from the signal.

Information recording medium, information reproducing method, and information reproducing apparatus

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Tokyo, Japan

Tetsuya Nishida