ClassID:

198123

G11B7/1381 - CPC Classification

Classification description:

Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation , reproducing using an optical beam at lower power ; Record carriers therefor; Heads, e.g. forming of the optical beam spot or modulation of the optical beam; Means for guiding the beam from the source to the record carrier or from the record carrier to the detector Non-lens elements for altering the properties of the beam, e.g. knife edges, slits, filters or stops

Recent Application in this class:
#1
20220270646
2022-08-25

Radiation image reading device

#2
20210325577
2021-10-21

Tunable plasmonic color device and method of making the same

#3
20210201948
2021-07-01

Holographic data storage device with single-arm structure

#4
20200185002
2020-06-11

Radiation image reading device

#5
20190353830
2019-11-21

TUNABLE PLASMONIC COLOR DEVICE AND METHOD OF MAKING THE SAME

#6
20180315448
2018-11-01

Optical disc device

#7
20180096703
2018-04-05

Optical medium reproducing device and optical medium reproducing method

#8
20170117011
2017-04-27

Optical medium reproduction apparatus and optical medium reproduction method

#9
20160343397
2016-11-24

Holographic light-emitting module and holographic storage system using the same

#10
20160336033
2016-11-17

Optical information device and optical information processing method

#11
20160322077
2016-11-03

Optical information recording/reproducing device

#12
20160307591
2016-10-20

Optical information reproduction device and optical information reproduction method

#13
20160232933
2016-08-11

Hologram reproducing apparatus and hologram reproducing method

#14
20160055876
2016-02-25

Optical information reproduction device and optical information reproduction method

#15
20150380041
2015-12-31

Optical disc information device and information processing device

#16
20150340055
2015-11-26

Optical information recording and reproducing apparatus and optical information recording and reproducing method

#17
20150318012
2015-11-05

Optical information reproduction apparatus and optical information reproduction method

#18
20150318009
2015-11-05

Optical information recording and reproducing device, optical information recording and reproducing method

#19
20150228299
2015-08-13

Recording device

#20
20150138942
2015-05-21

Optical disk information device and information processing device

#21
20150062675
2015-03-05

Dynamic aperture holography

#22
20140355404
2014-12-04

Optical medium reproducing apparatus and optical medium reproducing method

#23
20140153376
2014-06-05

OPTICAL PICKUP APPARATUS

#24
20140146321
2014-05-29

Detection device, information reproduction device, drive device, sensor, and detection method

#25
20140070114
2014-03-13

Method for writing and reading data by fluorescence on a light-sensitive substrate, and related substrate and devices

#26
20140068642
2014-03-06

Optical pickup and optical disc device

#27
20130083641
2013-04-04

Optical pickup device and optical read/write apparatus

#28
20130051209
2013-02-28

Objective lens for optical pickup and optical pickup apparatus having the same

#29
20130028066
2013-01-31

Method of reading optical information and method of recording optical information

#30
20130016599
2013-01-17

Optical pickup device and optical disc apparatus

#31
20130010584
2013-01-10

Optical head and optical information device

#32
20130010178
2013-01-10

Optical pickup apparatus having diffractive element for focusing and tracking plurality of light types

#33
20130003516
2013-01-03

Optical pickup device

#34
20120320727
2012-12-20

Optical pickup and optical read/write apparatus

#35
20120287766
2012-11-15

Optical pickup device and optical disc device

#36
20120281516
2012-11-08

Optical pickup and optical information storage medium system using the same

#37
20120250487
2012-10-04

Elastic member, mounting structure of optical element, and pickup apparatus having the same

#38
20120170431
2012-07-05

Optical head device, optical information device and information processing device

#39
20120151508
2012-06-14

Optical head device, optical information device, and information processing device

#40
20120140606
2012-06-07

Information storage device, information recording medium, and information storage method

#41
20120113784
2012-05-10

OPTICAL PICKUP

#42
20120082020
2012-04-05

Optical pickup device

#43
20120075981
2012-03-29

Optical pickup device

#44
20120051204
2012-03-01

OPTICAL PICKUP

#45
20120008483
2012-01-12

OPTICAL HEAD AND OPTICAL DISC APPARATUS

#46
20110292778
2011-12-01

Optical pickup device with detection optical system

#47
20110276989
2011-11-10

OPTICAL PICKUP DEVICE AND OPTICAL DISC DRIVE

#48
20110261670
2011-10-27

OPTICAL PICKUP DEVICE AND OPTICAL DISC DEVICE

#49
20110214138
2011-09-01

Diffraction grating, optical pickup device and optical disc apparatus

#50
20110211437
2011-09-01

Optical pickup device and optical disc apparatus

#51
20110205879
2011-08-25

OPTICAL PICK-UP DEVICE AND METHOD FOR MANUFACTURING THE SAME

#52
20110128832
2011-06-02

Optical head device and optical disc apparatus

#53
20110090776
2011-04-21

OPTICAL HEAD DEVICE, OPTICAL INFORMATION PROCESSING APPARATUS, AND SIGNAL DETECTING METHOD

#54
20110063961
2011-03-17

Optical disc apparatus and optical disc recording/reproducing method

#55
20110063956
2011-03-17

Optical pickup device and optical disc apparatus

#56
20110051590
2011-03-03

Optical pickup device

#57
20110051587
2011-03-03

Structure For Optical Pickup Head

#58
20110051574
2011-03-03

Optical pickup device and optical disk device using the same

#59
20110044151
2011-02-24

ELECTRONIC DEVICE

#60
20110032807
2011-02-10

OPTICAL PICKUP DEVICE AND OPTICAL DISK DEVICE INCLUDING THE SAME

#61
20100329102
2010-12-30

Optical pickup device

#62
20100309758
2010-12-09

TRACKING SERVO METHOD OF OPTICAL VIDEO DISC PLAYER AND ITS SPECIAL DEVICE

#63
20100284254
2010-11-11

Near field optical disc and near field optical disc reading apparatus

#64
20100246347
2010-09-30

Optical pickup device capable of emitting first and second light beams having different wavelengths and including a light blocking member for blocking light of a specific wavelength, and a optical information device, computer, optical disk player, car navigation system, optical disk recorder, and optical disk server performing the same

#65
20100226234
2010-09-09

Optical head device for detecting an error signal and an optical information recording/reproducing device

#66
20100224767
2010-09-09

PHOTODETECTOR, METHOD FOR MANUFACTURING THE SAME, AND PHOTODETECTION SYSTEM

#67
20100220576
2010-09-02

OPTICAL PICKUP DEVICE AND INFORMATION RECORDING/REPRODUCTION DEVICE

#68
20100214903
2010-08-26

Extraction optical system and optical head device including the same

#69
20100172002
2010-07-08

Optical pickup apparatus, reproduction apparatus, and reproduction method

#70
20100165823
2010-07-01

Optical pickup device and information processor

#71
20100155977
2010-06-24

Optical device and method of producing the same

#72
20100149957
2010-06-17

Method and system for detection enhancement for optical data storage

#73
20100149956
2010-06-17

Optical integrated device, method for detecting light, optical pickup, and optical disc apparatus

#74
20100142354
2010-06-10

Optical pickup device

#75
20100135146
2010-06-03

Optical pickup device and optical disc device with offset compensation

#76
20100135143
2010-06-03

Optical system, optical pickup apparatus, and optical disc apparatus for extracting signal beams

#77
20100103799
2010-04-29

Optical head device and optical recording and reading system

#78
20100097917
2010-04-22

Diffractive optical element and optical pickup

#79
20100097676
2010-04-22

Holographic storage system with improved data page quality

#80
20100091634
2010-04-15

OPTICAL HEAD DEVICE

#81
20100091632
2010-04-15

Optical system, optical pickup apparatus, and optical disk apparatus

#82
20100090113
2010-04-15

METHOD AND APPARATUS FOR RETRIEVING INFORMATION FROM OPTICAL STORAGE MEDIUM

#83
20100080105
2010-04-01

Optical pickup device and optical disk driver using the same

#84
20100061217
2010-03-11

OPTICAL HEAD UNIT AND OPTICAL INFORMATION RECORDING/REPRODUCING APPARATUS

#85
20100054107
2010-03-04

Recording and reproducing apparatus

#86
20100027405
2010-02-04

Optical pickup apparatus, focal-point adjusting method, and optical disc apparatus

#87
20100027386
2010-02-04

Optical pickup apparatus, focal-point adjusting method, and optical disc apparatus

#88
20100014410
2010-01-21

Optical pickup and optical disk device

#89
20100014138
2010-01-21

High Areal Density Holographic Data Storage System

#90
20100002299
2010-01-07

Optical element, optical element manufacturing method and optical pickup device

#91
20090316237
2009-12-24

HOLOGRAM RECORDER

#92
20090290478
2009-11-26

Optical information recording/reproducing device

#93
20090290471
2009-11-26

RECORDING AND REPRODUCING DEVICE, RECORDING AND REPRODUCING METHOD, RECORDING DEVICE, RECORDING METHOD, REPRODUCING DEVICE, AND REPRODUCING METHOD

#94
20090274031
2009-11-05

Optical pickup and information device for reducing an influence of stray light in an information recording medium

#95
20090274029
2009-11-05

OPTICAL PICKUP AND INFORMATION DEVICE

#96
20090268588
2009-10-29

Optical head, optical information recording and reproducing device, and optical information system device

#97
20090268584
2009-10-29

Optical pickup apparatus and optical disc apparatus with a single beam system

#98
20090262633
2009-10-22

Optical disc apparatus and optical disc replay method

#99
20090257340
2009-10-15

Optical head

#100
20090238060
2009-09-24

Optical reproducing device and optical reproducing method

#101
20090238051
2009-09-24

Optical disc drive

#102
20090237762
2009-09-24

Hologram media reading apparatus

#103
20090231981
2009-09-17

Optical pickup and optical data processing device using the same

#104
20090213718
2009-08-27

Optical recording device and optical recording and reproduction device

#105
20090213716
2009-08-27

Method and apparatus for recording/reproducing data on/from a recording medium

#106
20090205090
2009-08-13

Optical component operating in near-field transmission

#107
20090196145
2009-08-06

OPTICAL INFORMATION RECORDING/REPRODUCING APPARATUS, OPTICAL INFORMATION REPRODUCING APPARATUS, AND OPTICAL INFORMATION RECORDING MEDIUM

#108
20090185471
2009-07-23

Optical pickup device and optical disc apparatus

#109
20090185463
2009-07-23

Diffraction grating, optical pickup device and optical disc apparatus

#110
20090168628
2009-07-02

OPTICAL PICKUP APPARATUS

#111
20090168627
2009-07-02

Method of reading optical information and method of recording optical information

#112
20090154322
2009-06-18

Wavelength-selective light-shielding element and optical head using the same

#113
20090147634
2009-06-11

OPTICAL PICKUP APPARATUS AND INFORMATION RECORDING AND REPRODUCING APPARATUS

#114
20090141613
2009-06-04

HOLOGRAM APPARATUS

#115
20090129235
2009-05-21

Optical pickup device

#116
20090121117
2009-05-14

Optical head device, optical information recording/reproducing apparatus and operation method of optical information recording/reproducing apparatus

#117
20090116086
2009-05-07

Hologram recording device and hologram recording method

#118
20090109826
2009-04-30

OPTICAL PICKUP AND OPTICAL INFORMATION STORAGE MEDIUM SYSTEM EMPLOYING THE OPTICAL PICKUP

#119
20090103106
2009-04-23

Optical pickup

#120
20090086610
2009-04-02

Optical pickup apparatus, optical recording medium driving apparatus, and signal recording/reproducing method

#121
20090080026
2009-03-26

Method of expression, recording, reproduction, and communication of computer object using color, apparatus for recording and/or reproduction, recording medium, and method of preparation of code

#122
20090073826
2009-03-19

OPTICAL DEVICE FOR SCANNING AN INFORMATION CARRIER

#123
20090059329
2009-03-05

Hologram reading apparatus, hologram reading method, hologram recording apparatus and hologram recording method

#124
20090059328
2009-03-05

Hologram reading apparatus, hologram reading method, hologram recording apparatus and hologram recording method

#125
20090052301
2009-02-26

Optical system for detecting data signal and tracking error signal including polarizing optical element

#126
20090046337
2009-02-19

Method of recording and reading angle-multiplexed holograms that compensates for media shrinkage

#127
20090040894
2009-02-12

Optical head and data processing apparatus including the same

#128
20090034401
2009-02-05

OPTICAL DISK APPARATUS

#129
20090028035
2009-01-29

Optical head device and optical information processing device

#130
20090016193
2009-01-15

Optical pickup apparatus

#131
20090016191
2009-01-15

OPTICAL HEAD DEVICE

#132
20090016180
2009-01-15

Optical pickup apparatus

#133
20090010137
2009-01-08

Optical disc drive and optical information system

#134
20090010136
2009-01-08

Beam shaper for an optical storage system

#135
20090003183
2009-01-01

Optical pickup, optical information recording device, optical information recording method, optical information reproduction device, optical information reproduction method and optical information recording medium

#136
20080316898
2008-12-25

Confocal optical system aperture detector that measures a light quantity balance of light received to detect a position displacement, and a confocal optical system aperture position controller, an optical head and a position detecting method performing the same

#137
20080316891
2008-12-25

Optical Scanning Device

#138
20080315069
2008-12-25

Optical head device

#139
20080304398
2008-12-11

Optical Head That Improves Read Signal Characteristics

#140
20080298404
2008-12-04

Radiation Beam Source Device

#141
20080285427
2008-11-20

OPTICAL PICK-UP AND DISC APPARATUS HAVING THE SAME

#142
20080267039
2008-10-30

Holographic recording apparatus, holographic reproducing apparatus and holographic recording and reproducing apparatus

#143
20080267020
2008-10-30

OPTICAL DISC APPARATUS AND FOCUS CONTROL METHOD

#144
20080267019
2008-10-30

Optical Pickup Apparatus and Optical Disk Drive

#145
20080259750
2008-10-23

Optical pick-up head, optical information apparatus, and optical information reproducing method

#146
20080247298
2008-10-09

Optical system, optical pickup apparatus, and optical disk apparatus

#147
20080239891
2008-10-02

Apparatus for reproducing signal from multi-layered optical disk using multiple photo detectors

#148
20080205245
2008-08-28

Optical pickup apparatus

#149
20080205212
2008-08-28

OPTICAL HEAD APPARATUS, INFORMATION RECORDING/REPRODUCING APPARATUS INCLUDING THE OPTICAL HEAD APPARATUS, AND INFORMATION RECORDING/REPRODUCING METHOD

#150
20080186831
2008-08-07

Optical Scanning Device

#151
20080180768
2008-07-31

PHOTO DETECTING DEVICE AND HOLOGRAPHIC DATA REPRODUCING APPARATUS FOR MULTILAYERED HOLOGRAPHIC DATA STORAGE MEDIUM

#152
20080175110
2008-07-24

Optical head, optical disc drive, computer, optical discplayer and optical disc recorder

#153
20080165643
2008-07-10

Multivalued information reproducing method and multivalued information reproducing apparatus

#154
20080165634
2008-07-10

Enhanced data storage and retrieval devices and systems and methods for utilizing the same

#155
20080151253
2008-06-26

Method and assembly for confocal, chromatic, interferometric and spectroscopic scanning of optical, multi-layer data memories

#156
20080137516
2008-06-12

Optical pickup device

#157
20080123492
2008-05-29

Optical pick-up capable of eliminating stray beams

#158
20080123166
2008-05-29

Holographic storage system with apodization filter

#159
20080107859
2008-05-08

Optical information recording medium

#160
20080094998
2008-04-24

SYSTEM FOR GENERATING REFERENCE BEAM ANGLE CONTROL SIGNAL AND HOLOGRAPHIC INFORMATION RECORDING AND/OR REPRODUCING APPARATUS EMPLOYING THE SYSTEM

#161
20080094976
2008-04-24

Optical pickup apparatus and optical disc apparatus using same

#162
20080094951
2008-04-24

Optical pick up apparatus with a single beam system and having a diffraction grating

#163
20080094949
2008-04-24

Optical pick up apparatus with a single beam system and having a diffraction grating

#164
20080094948
2008-04-24

Optical pickup apparatus and optical disc apparatus using same

#165
20080093569
2008-04-24

Optical pickup apparatus and optical disc apparatus using same

#166
20080089205
2008-04-17

Optical pickup and optical disc apparatus including the same

#167
20080089195
2008-04-17

Optical pick-up head, optical information apparatus, and optical information reproducing method

#168
20080088898
2008-04-17

Holographic storage system with multiple reference beams

#169
20080088897
2008-04-17

Hologram reconstructing apparatus and hologram reconstructing method

#170
20080084798
2008-04-10

Optical pick-up head, optical information apparatus, and optical information reproducing method

#171
20080084797
2008-04-10

Optical head device and optical information device

#172
20080068944
2008-03-20

Optical pick-up head, optical information apparatus, and optical information reproducing method

#173
20080044125
2008-02-21

Phase plate and optical head device

#174
20080037085
2008-02-14

Optical head and multiplexing methods for reflection type holographic storage using spatial filtering

#175
20080025189
2008-01-31

Optical pickup apparatus

#176
20080025187
2008-01-31

Optical pickup apparatus, method of controlling the same, and information recording and reproducing apparatus

#177
20080025185
2008-01-31

Hologram Reproducing Head

#178
20080019254
2008-01-24

OPTICAL PICKUP DEVICE

#179
20080018969
2008-01-24

Optical Integrated Unit Including Hologram Element and Optical Pickup Device

#180
20080008059
2008-01-10

Optical pickup and optical disc apparatus

#181
20070291598
2007-12-20

Servo Branch of Optical Disc Drive Comprising a Switchable Diaphragm and a Device for Beam Deflection, and Methods for Measuring Beam Lanking and Spherical Aberration

#182
20070280085
2007-12-06

Optical disc device and optical pickup

#183
20070280083
2007-12-06

Recording and playback apparatus and optical head

#184
20070274189
2007-11-29

Optical pickup apparatus

#185
20070268807
2007-11-22

Optical disc drive apparatus

#186
20070263518
2007-11-15

Optical Head Apparatus and Optical Information Recording/Reproducing Apparatus With the Same

#187
20070253311
2007-11-01

OPTICAL PICK-UP APPARATUS AND OPTICAL DISC APPARATUS

#188
20070247997
2007-10-25

Optical pickup device, and information recording and reproduction device

#189
20070247683
2007-10-25

Optical information processing apparatus, optical information recording method, optical information reproducing method and optical information servo controlling method

#190
20070237040
2007-10-11

Optical head and optical disk device capable of detecting spherical aberration

#191
20070237039
2007-10-11

Optical disc drive having a mechanism to reduce the noise level of a focus error signal

#192
20070223075
2007-09-27

Hologram Apparatus

#193
20070217300
2007-09-20

Optical information recording/reproducing apparatus

#194
20070206451
2007-09-06

Optical pickup and optical disc apparatus

#195
20070201324
2007-08-30

OPTICAL-PICKUP HEAD DEVICE, AND METHOD AND APPARATUS FOR REPRODUCING OPTICAL STORAGE MEDIUM

#196
20070195664
2007-08-23

Optical pick-up head, optical information apparatus, and optical information reproducing method

#197
20070195663
2007-08-23

Optical pick-up head, optical information apparatus, and optical information reproducing method

#198
20070195662
2007-08-23

Method for correcting influence of thickness unevenness of recording medium, information recording/reproducing apparatus using the same method and optical head unit

#199
20070195659
2007-08-23

Optical pickup device having three light sources with a holographic element for directing diffraction light to photodetectors

#200
20070189133
2007-08-16

Method for correcting influence of thickness unevenness of recording medium, information recording/reproducing apparatus using the same method and optical head unit

#201
20070189131
2007-08-16

Optical disc device

#202
20070189130
2007-08-16

Optical information device and information recording and reproduction device

#203
20070183298
2007-08-09

Optical pickup device, recording and reproducing apparatus and gap detection method

#204
20070183279
2007-08-09

APPARATUS FOR OPTICALLY RECORDING AND REPRODUCING INFORMATION

#205
20070183275
2007-08-09

Method for correcting influence of thickness unevenness of recording medium, information recording/reproducing apparatus using the same method and optical head unit

#206
20070171786
2007-07-26

Optical pickup apparatus and optical disk apparatus

#207
20070171780
2007-07-26

Method for correcting influence of thickness unevenness of recording medium, information recording/reproducing apparatus using the same method and optical head unit

#208
20070164241
2007-07-19

Optical pickup and optical information apparatus

#209
20070133374
2007-06-14

Optical pickup and optical disc apparatus including a multi-section diffractive element

#210
20070127349
2007-06-07

Optical pickup apparatus

#211
20070109945
2007-05-17

Optical pickup

#212
20070109941
2007-05-17

Optical storage in discs having multiple data layers

#213
20070109632
2007-05-17

Optical pickup apparatus

#214
20070104072
2007-05-10

Extraction optical system, optical pick-up device and optical disc apparatus

#215
20070082562
2007-04-12

Multi-beam optical scanning device

#216
20070081431
2007-04-12

Optical pickup

#217
20070036058
2007-02-15

Method and unit for separating light and optical pickup device and optical recording/playback apparatus based thereon

#218
20070025205
2007-02-01

Optical pickup and optical recording and/or reproducing apparatus employing the same

#219
20070007430
2007-01-11

Optical head device

#220
20070002704
2007-01-04

Optical head and optical disc apparatus

#221
20070001112
2007-01-04

Optical element, optical pickup device, and optical information recording and/or reproducing apparatus

#222
20060291362
2006-12-28

Optical semiconductor device and method of manufacture thereof

#223
20060285473
2006-12-21

Optical pickup unit

#224
20060280097
2006-12-14

Apparatus using light-attenuating element for optically reproducing and recording information

#225
20060268669
2006-11-30

Optical pickup unit and information recording/reproducing apparatus

#226
20060262708
2006-11-23

Optical head unit and optical disc apparatus

#227
20060262700
2006-11-23

Optical head, light-emitting/receiving device, and apparatus for recording/reproducing optical recording/recorded medium

#228
20060256698
2006-11-16

Optical scanning device

#229
20060256693
2006-11-16

Apparatus for reading from and/or writing to optical recording media

#230
20060245317
2006-11-02

Optical head and information recording/reproducing apparatus

#231
20060239138
2006-10-26

Optical pickup and optical storage device

#232
20060233081
2006-10-19

Optical pickup device

#233
20060233068
2006-10-19

Optical pickup and optical storage device

#234
20060227335
2006-10-12

Light wavefront measuring instrument, light wavefront measuring method, and light source adjusting method

#235
20060221419
2006-10-05

Hologram recorder

#236
20060193236
2006-08-31

Optical head unit and optical disc apparatus

#237
20060193221
2006-08-31

Optical head unit and optical disc apparatus

#238
20060187776
2006-08-24

Information recording and reproducing apparatus and method for controlling positions of optical pickup device and objective lens used for the apparatus

#239
20060169401
2006-08-03

Method of making fluorescent discs

#240
20060164955
2006-07-27

Recording and playback apparatus and optical head including a variable optical coupling efficiency device

#241
20060164951
2006-07-27

Optical head and optical disk unit

#242
20060152783
2006-07-13

High areal density holographic data storage system

#243
20060140078
2006-06-29

Optical pickup device

#244
20060140070
2006-06-29

Optical information reproduction device

#245
20060126673
2006-06-15

Optical pickup device

#246
20060126458
2006-06-15

Optical pickup head and information recording and/or reproducing device incorporating same

#247
20060120248
2006-06-08

Diffraction element and optical pick-up apparatus having the same

#248
20060120233
2006-06-08

Optical head device and method for correcting spherical aberration

#249
20060118704
2006-06-08

Optical pickup device and optical element

#250
20060114791
2006-06-01

Ultra-high data density optical media system

#251
20060114775
2006-06-01

Optical pickup apparatus

#252
20060109772
2006-05-25

Optical pick-up apparatus and method for multi-optical disk type recording/reproducing

#253
20060104186
2006-05-18

Optical pickup apparatus employing a grating and a hologram that generate multiple beams detected by a photodetector

#254
20060104168
2006-05-18

Optical head and optical device provided with optical head

#255
20060103880
2006-05-18

Method of recording a computer object using color enabled by a recording device and communication device

#256
20060103865
2006-05-18

Method of expression, recording, reproduction, and communication of computer object using color, apparatus for recording and/or reproduction, recording medium, and method of preparation of code

#257
20060102826
2006-05-18

Optical pickup device

#258
20060099376
2006-05-11

Optical data storage system having combined fluorescent three-dimensional information carrier

#259
20060092781
2006-05-04

Method for correcting influence of thickness unevenness of recording medium, information recording/reproducing apparatus using the same method and optical head unit

#260
20060092780
2006-05-04

Method for correcting influence of thickness unevenness of recording medium, information recording/reproducing apparatus using the same method and optical head unit

#261
20060092779
2006-05-04

Method for correcting influence of thickness unevenness of recording medium, information recording/reproducing apparatus using the same method and optical head unit

#262
20060087951
2006-04-27

Optical pickup device and optical disk device having a diffraction element so that a first light beam and a second light beam comport with each other

#263
20060083146
2006-04-20

Information reproduction apparatus

#264
20060083123
2006-04-20

Method for correcting influence of thickness unevenness of recording medium, information recording/reproducing apparatus using the same method and optical head unit

#265
20060081761
2006-04-20

Optical pickup apparatus and optical disk apparatus

#266
20060077550
2006-04-13

Optical head with light sources of different wavelength

#267
20060072422
2006-04-06

Scanning device including an optical filter

#268
20060067178
2006-03-30

Optical pickup device

#269
20060066948
2006-03-30

Multi-level and gray-level diffraction gratings

#270
20060062102
2006-03-23

Optical data storage system

#271
20060062101
2006-03-23

Optical pickup device

#272
20060056276
2006-03-16

Optical disk apparatus using mechanism for controlling spherical aberration

#273
20060044638
2006-03-02

Hologram laser unit and optical pickup apparatus

#274
20060028932
2006-02-09

Optical pickup device

#275
20060023610
2006-02-02

Optical pickup device and optical disk device

#276
20060023608
2006-02-02

Optical pickup having a plurality of photodetectors divided into four regions used to obtain both focus and tracking error signals

#277
20060018236
2006-01-26

Optical recording/reproducing apparatus with transmission amount variation unit

#278
20060007809
2006-01-12

Optical pickup

#279
20060007385
2006-01-12

Optical attenuator and optical head device

#280
20060002276
2006-01-05

Optical disc apparatus

#281
20050276203
2005-12-15

Optical pickup apparatus

#282
20050276201
2005-12-15

Optical head device

#283
20050270672
2005-12-08

Switchable optical element

#284
20050259557
2005-11-24

Optical disk unit capable of restraining changes in light quantity

#285
20050254393
2005-11-17

Optical information processing device and recording medium

#286
20050249096
2005-11-10

Holographic ROM reader having servo control

#287
20050249062
2005-11-10

Optical pickup

#288
20050237902
2005-10-27

Optical disk apparatus with a wavelength plate having a two-dimensional array of birefringent regions

#289
20050232118
2005-10-20

Optical pickup device compatible with two types of optical recording media

#290
20050219989
2005-10-06

Device for reading and/or writing optical recording media

#291
20050213222
2005-09-29

Optical lens and method of producing the same, method of producing optical lens array, focus error signal production method, and optical pickup apparatus

#292
20050201220
2005-09-15

Optical pickup device that corrects the spot shape of reflected light beams

#293
20050199778
2005-09-15

Optical pick-up head, optical information apparatus, and optical information reproducing method

#294
20050195723
2005-09-08

Optical device, method for producing the same and recording and/or reproducing apparatus employing the same

#295
20050195706
2005-09-08

Optical pickup device for optical disks having different track pitches

#296
20050195485
2005-09-08

Optical device, method of producing the same, optical pickup, and optical information processing device

#297
20050185564
2005-08-25

Method for preparing an optical device using position markers around an optical lens and a light barrier film

#298
20050185563
2005-08-25

Optical device, method for producing the same and recording and/or reproducing apparatus employing the same

#299
20050169152
2005-08-04

Optical pickup apparatus

#300
20050163437
2005-07-28

Optical pickup device and optical disc device