公开(公告)号：US20140160911A1

公开(公告)日：2014-06-12

申请号：US14100359

申请日：2013-12-09

Applicant: HITACHI-LG DATA STORAGE, INC.

Inventor： Soichiro ETO ,  Yoshitaka MORIMOTO

IPC: G11B27/36

CPC classification number: G11B7/005 ,  G11B20/10305 ,  G11B20/24

Abstract: A method for evaluating a reproduction performance which reproduces a specific pattern recording signal to measure a reproduced signal noise, and calculates an evaluated value of a reproduction performance on the basis of a frequency characteristic of the measured reproduced signal noise.

Abstract translation: 一种用于评估再现特性图形记录信号以测量再现信号噪声的再现性能的方法，并且基于测量的再现信号噪声的频率特性来计算再现性能的评估值。

公开(公告)号：US20190293406A1

公开(公告)日：2019-09-26

申请号：US16168972

申请日：2018-10-24

Applicant: Hitachi-LG Data Storage, Inc.

Inventor： Daisuke TOMITA ,  Hideo SUENAGA ,  Takahiro KUROKAWA ,  Yoshitaka MORIMOTO

IPC: G01B9/02 ,  G01B11/06 ,  G02B27/09

Abstract: The optical module for optical height measurement includes a laser light source, an irradiation optical system, a detection optical system, and a detector. The laser light source is configured to irradiate the layer-structured specimen with a light beam. The irradiation optical system includes an objective lens. The objective lens is located to be approximately perpendicular to the layer-structured specimen. The detection optical system is configured to guide a reflected light reflected by the layer-structured specimen and a light passing through the objective lens and an aperture-restrictor-for-return to the detector. The aperture-restrictor-for-return is located immediately after the objective lens. The aperture-restrictor-for-return is configured to restrict the reflected light and cause only a light in a high NA region to pass through. The detector is configured to convert an entered light into a light detection signal. The detector includes a multi-divided detector array.

公开(公告)号：US20140022881A1

公开(公告)日：2014-01-23

申请号：US13891670

申请日：2013-05-10

Applicant: HITACHI CONSUMER ELECTRONICS CO., LTD ,  HITACHI-LG DATA STORAGE, INC.

Inventor： Yoshitaka MORIMOTO ,  Soichiro ETO ,  Koichi WATANABE

IPC: G11B7/1267

CPC classification number: G11B7/1267 ,  G11B7/0062 ,  G11B20/10398

Abstract: A recording waveform is adjusted based on the fluctuation amount of the mark edge position, focused on that fluctuation of a mark edge position is increased in aged deterioration of a recording signal. Specifically, the recording waveform is adjusted such that a fluctuation amount becomes minimum or a threshold value or less. Then, information is recorded on the optical disc using the recording waveform. Further, provided is a recording medium or an information recording apparatus which stores parameters of the recording waveform.

Abstract translation: 基于标记边缘位置的波动量来调整记录波形，集中在记录信号的老化变差中标记边缘位置的波动增加。 具体地说，调整记录波形使得波动量变得最小或阈值以下。 然后，使用记录波形将信息记录在光盘上。 此外，提供了存储记录波形的参数的记录介质或信息记录装置。

公开(公告)号：US20190293408A1

公开(公告)日：2019-09-26

申请号：US16170079

申请日：2018-10-25

Applicant: Hitachi-LG Data Storage, Inc.

Inventor： Daisuke TOMITA ,  Hideo SUENAGA ,  Takahiro KUROKAWA ,  Yoshitaka MORIMOTO

IPC: G01B11/06

Abstract: An optical module for optical height measurement optically measures a height of a specimen and includes an irradiation optical system, two detection optical systems, and a light dividing element. The irradiation optical system includes a laser light source and an objective lens to irradiate the specimen with a light beam. The two detection optical systems each include a divided optical detector configured to detect a reflected light reflected by the specimen. The light dividing element is configured to guide the reflected light to the two detection optical systems. A light that has transmitted the light dividing element and a light reflected by the light dividing element are guided to the respective two detection optical systems. Intensity distributions of the transmitted light and the reflected light on the two detection optical systems are inverted in line symmetry.

公开(公告)号：US20140211601A1

公开(公告)日：2014-07-31

申请号：US14167369

申请日：2014-01-29

Applicant: Hitachi-LG Data Storage, Inc. ,  Hitachi Consumer Electronics Co., Ltd.

Inventor： Yoshitaka MORIMOTO ,  Soichiro ETO ,  Koichi WATANABE

IPC: G11B20/18

CPC classification number: G11B20/182 ,  G11B20/10305 ,  G11B20/10333 ,  G11B20/10398

Abstract: When data is recorded on an optical disc, and stored for a long period of time, there is a need to periodically evaluate whether a quality of the recorded data is determined with time, or not. If the signal quality is lower than a given level as an evaluation result, a work for moving the data to a brand-new optical disc is required. However, in periodical inspection, if the number of optical discs is enormous, a large amount of time is required to evaluate all data recorded on the optical disc. In recording user data on the optical disc, a signal of a particular pattern having a lifetime shorter than a reference lifetime of the user data is recorded in a given area of the optical disc in advance, the particular pattern signal is reading at given time intervals, and processing on the user data is determined on the basis of the evaluation result of the signal quality.

Abstract translation: 当数据被记录在光盘上并且长时间存储时，需要周期性地评估是否随时间确定记录数据的质量。 如果信号质量低于给定的水平作为评估结果，则需要将数据移动到全新光盘的工作。 然而，在定期检查中，如果光盘数量巨大，则需要大量的时间来评估记录在光盘上的所有数据。 在光盘上记录用户数据时，预先将具有比用户数据的参考寿命短的寿命的特定模式的信号预先记录在光盘的给定区域中，特定模式信号以给定时间间隔读取 并且基于信号质量的评估结果确定对用户数据的处理。