Sony Corporation

Mitsubishi Electric Corporation

Humming Heads Inc.

Hiroki Shima

Kenji Yamamoto

Tsuyoshi Yoshida

Katsuhiro Shimizu

Takashi Sugihara

Yoshiyuki Matsumoto

Toshiyuki Tokura

Kiyoshi Onohara

Aritomo Uemura

Naoyuki Oe

Takahiro Shima

Yusuke Minamii

Takahiro Takeda

Tomomichi Tanaka

In a data conversion auxiliary module which is at a higher level than a file system in a disk management hierarchy, data stored in a storage medium, which becomes an object, is successively accessed. Then, a data conversion module captures a sector-unit access request to a device driver from the file system, converts data of a sector which is returned from the device driver, and writes the conversion data in the sector. Thereby, data conversion can be executed on a specific region of the storage medium, which is associated with the data in the storage medium.

Data conversion method on storage medium, apparatus and program

A repeater includes a variable optical attenuating unit that collectively attenuates WDM optical signal input, an optical-attenuation adjusting unit that adjusts attenuation in the variable optical attenuating unit, and an optical amplifying unit that collectively amplifies and outputs the WDM optical signal collectively attenuated, to a downstream side. An optical-attenuation adjusting unit includes an input level detector; an output level detector; an output-level transmitting unit that receives information of a signal level of WDM optical signal output by a repeater at an upstream side and transmits information of a signal level of the WDM optical signal detected by the output level detector to a repeater at a downstream side; and an attenuation amount controller that controls the variable optical attenuating unit by calculating an attenuation amount thereof based on information of a signal level detected by the input level detector and a signal level received by the output-level transmitting unit.

Optical transmission system and repeater

An actuator () includes six suspension members () to (), (), and () that connect a bobbin () for holding a lens holder () to a suspension base (), and an aberration-correcting element () mounted on the bobbin (). One-end portions of the two lower suspension members () and () are fixed to both sides of the aberration-correcting element () between which the optical axis of an objective lens () is disposed, and the other-end portions of the suspension members () and () are fixed to both sides of the suspension base () spaced in the X-axis direction. First and second driving signals (S) and (S) are supplied to the aberration-correcting element () through the suspension members () and ().

Actuator

Growing community of inventors

Tokyo, Japan

Hiroki Shima