Tsutomu Matsui

Person

Tokyo, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Phase change optical disk initializing apparatus
- Patent number 6,278,674
- Issue date Aug 21, 2001
- NEC Corporation
- Shigeru Araki
- G11 - INFORMATION STORAGE
Information Patent Grant
Method for erasing rewritable optical disk using two laser beams
- Patent number 6,157,596
- Issue date Dec 5, 2000
- NEC Corporation
- Tsutomu Matsui
- G11 - INFORMATION STORAGE
Information Patent Grant
Astigmatic difference correcting method for optical head and appara...
- Patent number 6,094,406
- Issue date Jul 25, 2000
- NEC Corporation
- Tsutomu Matsui
- G11 - INFORMATION STORAGE
Information Patent Grant
Astigmatic difference correcting method for optical head and appara...
- Patent number 5,978,345
- Issue date Nov 2, 1999
- NEC Corporation
- Tsutomu Matsui
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical recording medium having multiple recording layers and metho...
- Patent number 5,959,961
- Issue date Sep 28, 1999
- NEC Corporation
- Tsutomu Matsui
- G11 - INFORMATION STORAGE
Information Patent Grant
Land/groove detecting method and apparatus for an optical disk
- Patent number 5,909,416
- Issue date Jun 1, 1999
- NEC Corporation
- Tsutomu Matsui
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical disc apparatus with sensing circuitry to judge a movement d...
- Patent number 5,901,120
- Issue date May 4, 1999
- NEC Corporation
- Tsutomu Matsui
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical head apparatus
- Patent number 5,886,978
- Issue date Mar 23, 1999
- NEC Corporation
- Tsutomu Matsui
- G11 - INFORMATION STORAGE
Information Patent Grant
Device for initializing an optical disc
- Patent number 5,852,595
- Issue date Dec 22, 1998
- NEC Corporation
- Tsutomu Matsui
- G11 - INFORMATION STORAGE
Information Patent Grant
Apparatus and method for playing back optical recording having high...
- Patent number 5,812,515
- Issue date Sep 22, 1998
- NEC Corporation
- Tsutomu Matsui
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical head with a plurality of optical sensors to receive reflect...
- Patent number 5,787,064
- Issue date Jul 28, 1998
- NEC Corporation
- Tsutomu Matsui
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical disk initializing apparatus
- Patent number 5,784,353
- Issue date Jul 21, 1998
- NEC Corporation
- Tsutomu Matsui
- G11 - INFORMATION STORAGE
Information Patent Grant
Astigmatic difference correcting method for optical head and appara...
- Patent number 5,777,961
- Issue date Jul 7, 1998
- NEC Corporation
- Tsutomu Matsui
- G11 - INFORMATION STORAGE
Information Patent Grant
Method and apparatus for controlling track kick for optical disk drive
- Patent number 5,757,746
- Issue date May 26, 1998
- NEC Corporation
- Tsutomu Matsui
- G11 - INFORMATION STORAGE
Information Patent Grant
Tracking signal detection with a photodetector receiving one of a ....
- Patent number 5,751,681
- Issue date May 12, 1998
- NEC Corporation
- Tsutomu Matsui
- G11 - INFORMATION STORAGE
Information Patent Grant
Objective lens actuator for optical head
- Patent number 5,748,580
- Issue date May 5, 1998
- NEC Corporation
- Tsutomu Matsui
- G02 - OPTICS
Information Patent Grant
Objective lens actuator and method for manufacturing the same
- Patent number 5,734,638
- Issue date Mar 31, 1998
- NEC Corporation
- Tsutomu Matsui
- G11 - INFORMATION STORAGE
Information Patent Grant
Objective lens actuator for optical head and used for high speed ac...
- Patent number 5,663,840
- Issue date Sep 2, 1997
- NEC Corporation
- Tsutomu Matsui
- G02 - OPTICS
Information Patent Grant
Thin type optical head
- Patent number 5,623,372
- Issue date Apr 22, 1997
- NEC Corporation
- Tsutomu Matsui
- G11 - INFORMATION STORAGE
Information Patent Grant
Method for erasing rewritable optical disk using two laser beams an...
- Patent number 5,621,707
- Issue date Apr 15, 1997
- NEC Corporation
- Tsutomu Matsui
- G11 - INFORMATION STORAGE
Information Patent Grant
Method and apparatus for detecting tracking error signal for optica...
- Patent number 5,612,936
- Issue date Mar 18, 1997
- NEC Corporation
- Tsutomu Matsui
- G11 - INFORMATION STORAGE
Information Patent Grant
Objective lens actuator and method for manufacturing the same
- Patent number 5,604,641
- Issue date Feb 18, 1997
- NEC Corporation
- Tsutomu Matsui
- G11 - INFORMATION STORAGE
Information Patent Grant
Apparatus for detecting a focus error and a tracking error of an op...
- Patent number 5,559,767
- Issue date Sep 24, 1996
- NEC Corporation
- Tsutomu Matsui
- G11 - INFORMATION STORAGE
Information Patent Grant
Objective-lens actuator
- Patent number 5,548,449
- Issue date Aug 20, 1996
- NEC Corporation
- Tsutomu Matsui
- G11 - INFORMATION STORAGE
Information Patent Grant
Actuator for an optical head
- Patent number 5,513,047
- Issue date Apr 30, 1996
- NEC Corporation
- Tsutomu Matsui
- G11 - INFORMATION STORAGE
Information Patent Grant
Concurrent recording and reproducing optical disc and optical head...
- Patent number 5,392,271
- Issue date Feb 21, 1995
- NEC Corporation
- Tsutomu Matsui
- G11 - INFORMATION STORAGE

Tsutomu Matsui

Person

Patents Grantslast 30 patents

Phase change optical disk initializing apparatus

Method for erasing rewritable optical disk using two laser beams

Astigmatic difference correcting method for optical head and appara...

Astigmatic difference correcting method for optical head and appara...

Optical recording medium having multiple recording layers and metho...

Land/groove detecting method and apparatus for an optical disk

Optical disc apparatus with sensing circuitry to judge a movement d...

Optical head apparatus

Device for initializing an optical disc

Apparatus and method for playing back optical recording having high...

Optical head with a plurality of optical sensors to receive reflect...

Optical disk initializing apparatus

Astigmatic difference correcting method for optical head and appara...

Method and apparatus for controlling track kick for optical disk drive

Tracking signal detection with a photodetector receiving one of a ....

Objective lens actuator for optical head

Objective lens actuator and method for manufacturing the same

Objective lens actuator for optical head and used for high speed ac...

Thin type optical head

Method for erasing rewritable optical disk using two laser beams an...

Method and apparatus for detecting tracking error signal for optica...

Objective lens actuator and method for manufacturing the same

Apparatus for detecting a focus error and a tracking error of an op...

Objective-lens actuator

Actuator for an optical head

Concurrent recording and reproducing optical disc and optical head...