Foucault or knife-edge methods

Industry

CPC
G11B7/0916

This industry / category may be too specific. Please go to a parent level for more data

Parent Industries

GPHYSICS G11Information storage G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER G11B7/00Recording or reproducing by optical means

Current Industry

G11B7/0916Foucault or knife-edge methods

Industries

Please log in for detailed analytics

Patents Grantslast 30 patents

Information Patent Grant
Optical pickup apparatus having diffractive element for focusing an...
- Patent number 8,867,325
- Issue date Oct 21, 2014
- Sharp Kabushiki Kaisha
- Shinzoh Murakami
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical pickup device and optical disc apparatus
- Patent number 8,547,815
- Issue date Oct 1, 2013
- Hitachi Media Electronics Co., Ltd.
- Kazuyoshi Yamazaki
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical pickup device and optical disc apparatus
- Patent number 8,531,930
- Issue date Sep 10, 2013
- Hitachi Media Electronics Co., Ltd.
- Kazuyoshi Yamazaki
- G11 - INFORMATION STORAGE
Information Patent Grant
Displacement detection device and method
- Patent number 8,514,410
- Issue date Aug 20, 2013
- Kabushiki Kaisha Toshiba
- Kazuo Watabe
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical pickup device and optical read/write apparatus
- Patent number 8,451,700
- Issue date May 28, 2013
- Panasonic Corporation
- Yasushi Kobayashi
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical pickup
- Patent number 8,427,911
- Issue date Apr 23, 2013
- Hitachi Media Electronics Co., Ltd.
- Hiromi Kita
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical pickup device and optical disc apparatus using same
- Patent number 8,270,281
- Issue date Sep 18, 2012
- Hitachi Media Electronics Co., Ltd.
- Toshiteru Nakamura
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical pickup device and optical disc apparatus
- Patent number 8,223,613
- Issue date Jul 17, 2012
- Hitachi Media Electronics Co., Ltd.
- Kazuyoshi Yamazaki
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical pickup device
- Patent number 8,081,550
- Issue date Dec 20, 2011
- Hitachi Media Electronics Co., Ltd.
- Kunikazu Ohnishi
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical pick-up and optical information recording and reproducing a...
- Patent number 8,036,091
- Issue date Oct 11, 2011
- Hitachi Media Electronics Co., Ltd.
- Eriko Tatsu
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical head device for detecting an error signal and an optical in...
- Patent number 8,036,092
- Issue date Oct 11, 2011
- NEC Corporation
- Ryuichi Katayama
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical pickup apparatus
- Patent number 7,952,977
- Issue date May 31, 2011
- Sharp Kabushiki Kaisha
- Kazunori Matsubara
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical-integrated unit and optical pickup device used for reading...
- Patent number 7,911,922
- Issue date Mar 22, 2011
- Sharp Kabushiki Kaisha
- Katsushige Masui
- G11 - INFORMATION STORAGE
Information Patent Grant
Light receiving and emitting integrated device, optical pickup prov...
- Patent number 7,606,123
- Issue date Oct 20, 2009
- Sharp Kabushiki Kaisha
- Nobumasa Ono
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical pickup
- Patent number 7,573,801
- Issue date Aug 11, 2009
- Sharp Kabushiki Kaisha
- Yukio Watanabe
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical pickup device having three light sources with a holographic...
- Patent number 7,405,383
- Issue date Jul 29, 2008
- Sharp Kabushiki Kaisha
- Taizoh Yokota
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical disk device for detecting thickness errors of the transpare...
- Patent number 7,355,932
- Issue date Apr 8, 2008
- NEC Corporation
- Hidekazu Shirakawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical pickup device, optical disk drive, optical device and compo...
- Patent number 7,345,982
- Issue date Mar 18, 2008
- Sony Corporation
- Norio Fukasawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical storage device, optical device and servo controlling method...
- Patent number 7,307,928
- Issue date Dec 11, 2007
- Fujitsu Limited
- Takayuki Kawabe
- G11 - INFORMATION STORAGE
Information Patent Grant
Method and apparatus for optical head and optical information repro...
- Patent number 7,209,416
- Issue date Apr 24, 2007
- Hitachi, Ltd.
- Kouji Arikawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical pickup
- Patent number 7,180,845
- Issue date Feb 20, 2007
- Victor Company of Japan, Limited
- Minoru Ohyama
- G11 - INFORMATION STORAGE
Information Patent Grant
Multi-layer optical information recording medium with pits or grooves
- Patent number 7,136,349
- Issue date Nov 14, 2006
- Matsushita Electric Industrial Co., Ltd.
- Kenichi Nishiuchi
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Optical information recording medium manfacturing method therefor,...
- Patent number 7,116,631
- Issue date Oct 3, 2006
- Matsushita Electric Industrial Co., Ltd.
- Kenichi Nishiuchi
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Holographic optical element, position shift detecting apparatus, op...
- Patent number 7,113,316
- Issue date Sep 26, 2006
- Sanyo Electric Co., LTD
- Kazushi Mori
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical pickup
- Patent number 7,106,682
- Issue date Sep 12, 2006
- Sharp Kabushiki Kaisha
- Tetsuo Ueyama
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical head arrangements with single substrate lasers
- Patent number 7,106,681
- Issue date Sep 12, 2006
- Hitachi, Ltd.
- Shigeru Nakamura
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical pickup device and optical disk device and optical device an...
- Patent number 7,064,900
- Issue date Jun 20, 2006
- Sony Corporation
- Norio Fukasawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Aberration detection device, aberration detection method, and optic...
- Patent number 7,042,817
- Issue date May 9, 2006
- Sharp Kabushiki Kaisha
- Hiroyuki Tadano
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical pickup device
- Patent number 7,009,916
- Issue date Mar 7, 2006
- Samsung Electro-Mechanics Co., Ltd.
- Chon-Su Kyong
- G11 - INFORMATION STORAGE
Information Patent Grant
Method and apparatus for optical head and optical information repro...
- Patent number 6,967,919
- Issue date Nov 22, 2005
- Hitachi, Ltd.
- Kouji Arikawa
- G11 - INFORMATION STORAGE

Patents Applicationslast 30 patents

Information Patent Application
Optical Pickup
- Publication number 20130176840
- Publication date Jul 11, 2013
- Hitachi Media Electronics Co., Ltd.
- Hiromi Kita
- G11 - INFORMATION STORAGE
Information Patent Application
DISPLACEMENT DETECTION DEVICE AND METHOD
- Publication number 20130176576
- Publication date Jul 11, 2013
- KABUSHIKI KAISHA TOSHIBA
- Kazuo WATABE
- G01 - MEASURING TESTING
Information Patent Application
OPTICAL PICKUP DEVICE AND OPTICAL READ/WRITE APPARATUS
- Publication number 20130083641
- Publication date Apr 4, 2013
- PANASONIC CORPORATION
- Yasushi KOBAYASHI
- G11 - INFORMATION STORAGE
Information Patent Application
OPTICAL PICKUP DEVICE AND OPTICAL DISC APPARATUS
- Publication number 20130016599
- Publication date Jan 17, 2013
- Kazuyoshi Yamazaki
- G11 - INFORMATION STORAGE
Information Patent Application
OPTICAL PICKUP APPARATUS
- Publication number 20130010178
- Publication date Jan 10, 2013
- Sharp Kabusshiki Kaisha
- Shinzoh Murakami
- G11 - INFORMATION STORAGE
Information Patent Application
OPTICAL PICKUP DEVICE AND OPTICAL DISC APPARATUS
- Publication number 20120057445
- Publication date Mar 8, 2012
- Kazuyoshi YAMAZAKI
- G11 - INFORMATION STORAGE
Information Patent Application
OPTICAL PICKUP DEVICE AND OPTICAL DISC APPARATUS USING SAME
- Publication number 20110182165
- Publication date Jul 28, 2011
- TOSHITERU NAKAMURA
- G11 - INFORMATION STORAGE
Information Patent Application
OPTICAL PICKUP
- Publication number 20110182159
- Publication date Jul 28, 2011
- Hiromi KITA
- G11 - INFORMATION STORAGE
Information Patent Application
OPTICAL HEAD DEVICE, OPTICAL INFORMATION PROCESSING APPARATUS, AND...
- Publication number 20110090776
- Publication date Apr 21, 2011
- Masayuki ONO
- G11 - INFORMATION STORAGE
Information Patent Application
OPTICAL PICKUP DEVICE AND OPTICAL DISK DEVICE INCLUDING THE SAME
- Publication number 20110032807
- Publication date Feb 10, 2011
- SHARP KABUSHIKI KAISHA
- Tetsuo SAEKI
- G11 - INFORMATION STORAGE
Information Patent Application
OPTICAL PICK-UP AND OPTICAL INFORMATION RECORDING AND REPRODUCING A...
- Publication number 20110013502
- Publication date Jan 20, 2011
- Hitachi Media Electronics Co., Ltd.
- Eriko TATSU
- G11 - INFORMATION STORAGE
Information Patent Application
Optical Head Device and Optical Information Recording/Reproducing D...
- Publication number 20100226234
- Publication date Sep 9, 2010
- NEC Corporation
- Ryuichi Katayama
- G11 - INFORMATION STORAGE
Information Patent Application
OPTICAL PICKUP DEVICE
- Publication number 20100226229
- Publication date Sep 9, 2010
- Kunikazu OHNISHI
- G11 - INFORMATION STORAGE
Information Patent Application
OPTICAL HEAD DEVICE AND OPTICAL INFORMATION RECORDING OR REPRODUCIN...
- Publication number 20100142355
- Publication date Jun 10, 2010
- NEC Corporation
- Ryuichi Katayama
- G02 - OPTICS
Information Patent Application
METHOD FOR CONTROLLING FOCUS LOOP OF AN OPTICAL STORAGE DEVICE
- Publication number 20100034069
- Publication date Feb 11, 2010
- Chih-Ching Yu
- G11 - INFORMATION STORAGE
Information Patent Application
OPTICAL HEAD DEVICE AND OPTICAL INFORMATION RECORDING OR REPRODUCIN...
- Publication number 20090290473
- Publication date Nov 26, 2009
- NEC Corporation
- Ryuichi Katayama
- G11 - INFORMATION STORAGE
Information Patent Application
OPTIMAL DETECTION OF TWODOS SIGNALS
- Publication number 20090279409
- Publication date Nov 12, 2009
- Koninklijke Philips Electronics, N.V.
- Alexander Marc Van Der Lee
- G11 - INFORMATION STORAGE
Information Patent Application
Optical Pickup Device and Optical Disc Apparatus
- Publication number 20090185471
- Publication date Jul 23, 2009
- Hitachi Media Electronics Co., Ltd.
- Kazuyoshi Yamazaki
- G11 - INFORMATION STORAGE
Information Patent Application
OPTICAL PICKUP APPARATUS
- Publication number 20080205245
- Publication date Aug 28, 2008
- SHARP KABUSHIKI KAISHA
- Kazunori MATSUBARA
- G11 - INFORMATION STORAGE
Information Patent Application
Optical-integrated unit and optical pickup device used for reading...
- Publication number 20080013434
- Publication date Jan 17, 2008
- SHARP KABUSHIKI KAISHA
- Katsushige Masui
- G11 - INFORMATION STORAGE
Information Patent Application
Holographic diffraction element and optical pickup device using hol...
- Publication number 20080002540
- Publication date Jan 3, 2008
- Takehiro Hiramatsu
- G11 - INFORMATION STORAGE
Information Patent Application
Optical Head Apparatus and Optical Information Recording/Reproducin...
- Publication number 20070263518
- Publication date Nov 15, 2007
- Ryuichi Katayama
- G11 - INFORMATION STORAGE
Information Patent Application
Optical pickup device
- Publication number 20070195659
- Publication date Aug 23, 2007
- SHARP KABUSHIKI KAISHA
- Taizoh Yokota
- G02 - OPTICS
Information Patent Application
Laser-detector-grating-unit
- Publication number 20070139647
- Publication date Jun 21, 2007
- Koninklijke Philips Electronics N.V.
- Willem Gerard Ophey
- G11 - INFORMATION STORAGE
Information Patent Application
Multi-beam optical scanning device
- Publication number 20070082562
- Publication date Apr 12, 2007
- Alexander Marc Van Der Lee
- G11 - INFORMATION STORAGE
Information Patent Application
Optical head unit and optical disc apparatus
- Publication number 20070064573
- Publication date Mar 22, 2007
- Kazuhiro Nagata
- G11 - INFORMATION STORAGE
Information Patent Application
Optical pickup
- Publication number 20070053272
- Publication date Mar 8, 2007
- Sharp Kabushiki Kaisha
- Yukio Watanabe
- G11 - INFORMATION STORAGE
Information Patent Application
Optical pickup unit and information recording/reproducing apparatus
- Publication number 20060268669
- Publication date Nov 30, 2006
- Nobuaki Kaji
- G11 - INFORMATION STORAGE
Information Patent Application
Optical head unit and optical disc apparatus
- Publication number 20060262708
- Publication date Nov 23, 2006
- Kazuo Watabe
- G11 - INFORMATION STORAGE
Information Patent Application
Optical disk apparatus and an optical disk playback method
- Publication number 20060221785
- Publication date Oct 5, 2006
- Yuichiro Yamamoto
- G11 - INFORMATION STORAGE

Foucault or knife-edge methods

Industry

Parent Industries

Current Industry

Patents Grantslast 30 patents

Optical pickup apparatus having diffractive element for focusing an...

Optical pickup device and optical disc apparatus

Optical pickup device and optical disc apparatus

Displacement detection device and method

Optical pickup device and optical read/write apparatus

Optical pickup

Optical pickup device and optical disc apparatus using same

Optical pickup device and optical disc apparatus

Optical pickup device

Optical pick-up and optical information recording and reproducing a...

Optical head device for detecting an error signal and an optical in...

Optical pickup apparatus

Optical-integrated unit and optical pickup device used for reading...

Light receiving and emitting integrated device, optical pickup prov...

Optical pickup

Optical pickup device having three light sources with a holographic...

Optical disk device for detecting thickness errors of the transpare...

Optical pickup device, optical disk drive, optical device and compo...

Optical storage device, optical device and servo controlling method...

Method and apparatus for optical head and optical information repro...

Optical pickup

Multi-layer optical information recording medium with pits or grooves

Optical information recording medium manfacturing method therefor,...

Holographic optical element, position shift detecting apparatus, op...

Optical pickup

Optical head arrangements with single substrate lasers

Optical pickup device and optical disk device and optical device an...

Aberration detection device, aberration detection method, and optic...

Optical pickup device

Method and apparatus for optical head and optical information repro...

Patents Applicationslast 30 patents

Optical Pickup

DISPLACEMENT DETECTION DEVICE AND METHOD

OPTICAL PICKUP DEVICE AND OPTICAL READ/WRITE APPARATUS

OPTICAL PICKUP DEVICE AND OPTICAL DISC APPARATUS

OPTICAL PICKUP APPARATUS

OPTICAL PICKUP DEVICE AND OPTICAL DISC APPARATUS

OPTICAL PICKUP DEVICE AND OPTICAL DISC APPARATUS USING SAME

OPTICAL PICKUP

OPTICAL HEAD DEVICE, OPTICAL INFORMATION PROCESSING APPARATUS, AND...

OPTICAL PICKUP DEVICE AND OPTICAL DISK DEVICE INCLUDING THE SAME

OPTICAL PICK-UP AND OPTICAL INFORMATION RECORDING AND REPRODUCING A...

Optical Head Device and Optical Information Recording/Reproducing D...

OPTICAL PICKUP DEVICE

OPTICAL HEAD DEVICE AND OPTICAL INFORMATION RECORDING OR REPRODUCIN...

METHOD FOR CONTROLLING FOCUS LOOP OF AN OPTICAL STORAGE DEVICE

OPTICAL HEAD DEVICE AND OPTICAL INFORMATION RECORDING OR REPRODUCIN...

OPTIMAL DETECTION OF TWODOS SIGNALS

Optical Pickup Device and Optical Disc Apparatus

OPTICAL PICKUP APPARATUS

Optical-integrated unit and optical pickup device used for reading...

Holographic diffraction element and optical pickup device using hol...

Optical Head Apparatus and Optical Information Recording/Reproducin...

Optical pickup device

Laser-detector-grating-unit

Multi-beam optical scanning device

Optical head unit and optical disc apparatus

Optical pickup

Optical pickup unit and information recording/reproducing apparatus

Optical head unit and optical disc apparatus

Optical disk apparatus and an optical disk playback method