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Class Information
Number: 369/44.37
Name: Dynamic information storage or retrieval > With servo positioning of transducer assembly over track combined with information signal processing > Optical servo system > Plural incident beams
Description: Subject matter wherein plural beams incident upon the recording medium are used, which may be one or more focusing, tracking, playback or recording beams.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7626900 |
Optical pickup and disk drive apparatus |
Dec. 1, 2009 |
| 7623435 |
Optical pickup device, and information recording and reproduction device |
Nov. 24, 2009 |
| 7616550 |
Optical pickup unit |
Nov. 10, 2009 |
| 7613095 |
Optical pickup apparatus |
Nov. 3, 2009 |
| 7609606 |
Optical pickup device |
Oct. 27, 2009 |
| 7602691 |
Diffractive part |
Oct. 13, 2009 |
| 7586819 |
Optical pickup device |
Sep. 8, 2009 |
| 7583570 |
Optical pickup and disc drive apparatus |
Sep. 1, 2009 |
| 7580332 |
Optical pickup, optical disk drive, light detecting apparatus, and signal generating method for optical pickup |
Aug. 25, 2009 |
| 7548359 |
Double-wavelength light source unit and optical head device having four diffraction gratings |
Jun. 16, 2009 |
| 7545724 |
Optical pickup apparatus, optical element for optical pickup apparatus and producing method of optical element |
Jun. 9, 2009 |
| 7539118 |
Multitrack optical disc reader |
May. 26, 2009 |
| 7535814 |
Optical pickup device |
May. 19, 2009 |
| 7525897 |
Optical pickup device |
Apr. 28, 2009 |
| 7512055 |
Objective optical element and optical pickup apparatus |
Mar. 31, 2009 |
| 7480215 |
Read write device for optical memory and method therefore |
Jan. 20, 2009 |
| 7480228 |
Optical disc apparatus |
Jan. 20, 2009 |
| 7466636 |
Method for generating a corrected error signal, and corresponding apparatus |
Dec. 16, 2008 |
| 7466639 |
Optical disk device and optical disk discriminating method |
Dec. 16, 2008 |
| 7463575 |
Optical information recording medium, method for manufacturing the same, and initialization device |
Dec. 9, 2008 |
| 7438547 |
Optical recording medium and master disc for manufacturing optical recording medium |
Oct. 21, 2008 |
| 7420895 |
Signal detection method and apparatus and optical recording and/or reproducing apparatus using the same |
Sep. 2, 2008 |
| 7391684 |
Optical disk recording/reproducing apparatus |
Jun. 24, 2008 |
| 7376055 |
Method of annealing optical recording medium |
May. 20, 2008 |
| RE40329 |
Single objective lens for use with CD or DVD optical disks |
May. 20, 2008 |
| 7369466 |
Optical pickup apparatus and method for controlling phases of three beams |
May. 6, 2008 |
| 7369467 |
Optical pickup including polarization holographic optical element and photodetector |
May. 6, 2008 |
| 7366078 |
Optical pickup apparatus, recording/reproducing apparatus provided with the optical pickup apparatus, optical element, and information recording/reproducing method |
Apr. 29, 2008 |
| 7359295 |
Optical pickup apparatus and optical disk drive apparatus |
Apr. 15, 2008 |
| RE40229 |
Optical recording/reproducing apparatus for optical disks with various disk substrate thicknesses |
Apr. 8, 2008 |
| 7355933 |
Optical pickup device |
Apr. 8, 2008 |
| 7349299 |
Method of optical disc discrimination |
Mar. 25, 2008 |
| 7345965 |
Method for track counting and corresponding apparatus for reading from and/or writing to an optical recording medium |
Mar. 18, 2008 |
| 7342851 |
Optical pickup apparatus, recording/reproducing apparatus provided with the optical pickup apparatus, optical element, and information recording/reproducing method |
Mar. 11, 2008 |
| 7342868 |
Compatible optical pickup apparatus |
Mar. 11, 2008 |
| 7336586 |
Optical pickup device compatible with two types of optical recording media |
Feb. 26, 2008 |
| 7330406 |
Optical pickup device and optical element used for the same |
Feb. 12, 2008 |
| RE40017 |
Optical recording/reproducing apparatus for optical disks with various disk substrate thicknesses |
Jan. 22, 2008 |
| 7317668 |
Information recording and/or reproducing apparatus |
Jan. 8, 2008 |
| 7313061 |
Optical pickup having a plurality of photodetectors divided into four regions used to obtain both focus and tracking error signals |
Dec. 25, 2007 |
| 7307930 |
Optical disk apparatus |
Dec. 11, 2007 |
| 7301864 |
Objective lens, optical pick-up device, and optical disk device |
Nov. 27, 2007 |
| 7298675 |
Multilayer recording medium and optical pickup for recording and/or reproducing the same |
Nov. 20, 2007 |
| 7298676 |
Optical pickup apparatus having optical detection area for compensating for tracking error offset |
Nov. 20, 2007 |
| RE39883 |
Optical recording/reproducing apparatus for optical disks with various disk substrate thicknesses |
Oct. 16, 2007 |
| 7283439 |
Optical disk apparatus using mechanism for controlling spherical aberration |
Oct. 16, 2007 |
| 7280458 |
Optical pickup apparatus and optimal light spot focusing method |
Oct. 9, 2007 |
| RE39860 |
Optical recording/reproducing apparatus for optical disks with various disk substrate thicknesses |
Sep. 25, 2007 |
| 7274632 |
Optical head device and method for correcting spherical aberration |
Sep. 25, 2007 |
| 7272084 |
Optical disc apparatus and tracking control method |
Sep. 18, 2007 |
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