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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:

Class Number Class Name Patents
369/44.38 Recording 217


Patents under this class:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Patent Number Title Of Patent Date Issued
8687470 Optical disk playback device with three-dimensional playback functionality Apr. 1, 2014
8665679 Optical read/write apparatus and read apparatus Mar. 4, 2014
8644120 Optical information processing device and tracking control method thereof for use with grooveless multilayer optical disc Feb. 4, 2014
8630154 Apparatus comprising a pickup providing multiple beams Jan. 14, 2014
8619520 Lens driving unit for optical pickup and optical disc drive including the lens driving unit Dec. 31, 2013
8619522 Optical pickup and optical read/write apparatus Dec. 31, 2013
8599661 Optical disk device, optical pickup, and optical recording medium Dec. 3, 2013
8547814 Semiconductor laser device, optical pickup apparatus, and method of manufacturing semiconductor laser device Oct. 1, 2013
8542560 Diffraction grating and optical pickup device Sep. 24, 2013
8526284 Multilayer optical recording medium with interfacial surfaces Sep. 3, 2013
8514675 Suspension system for an optical pickup assembly Aug. 20, 2013
8503273 Optical disc device and recording method Aug. 6, 2013
8493831 Compatible optical pickup and optical recording and/or reproducing apparatus employing the same Jul. 23, 2013
8493824 Optical head and optical disc device Jul. 23, 2013
8488425 Optical pickup device and optical disc apparatus Jul. 16, 2013
8477577 Method for recording on and reading out from optical information recording medium Jul. 2, 2013
RE44333 Optical device Jul. 2, 2013
8472300 Optical head device and optical disc device Jun. 25, 2013
8446802 Optical drive device and focus servo control method May. 21, 2013
8427921 Light emitting device, optical pickup apparatus and method for manufacturing the same Apr. 23, 2013
8416656 Reproducing method and reproducing apparatus Apr. 9, 2013
8415606 Configurable photo detector circuit Apr. 9, 2013
8400899 Optical pickup device with detection optical system Mar. 19, 2013
8395975 Optical read/write apparatus Mar. 12, 2013
8385179 Optical disk device and optical disk discriminating method Feb. 26, 2013
RE43961 Optical head device and diffractive element, optical information apparatus, computer, disc player, car navigation system, optical disc recorder and vehicle Feb. 5, 2013
8335136 Optical pickup apparatus Dec. 18, 2012
8331207 Optical pickup and optical disc unit Dec. 11, 2012
8289831 Optical head, optical element with diffraction grating, optical disc device and information processing device Oct. 16, 2012
8284643 Recording apparatus and control method Oct. 9, 2012
8279725 Control device, control method, program, and recording medium Oct. 2, 2012
8279724 Optical pickup Oct. 2, 2012
8274875 Optical disc device and focus control method Sep. 25, 2012
8270281 Optical pickup device and optical disc apparatus using same Sep. 18, 2012
8264922 Optical disc drive having a mechanism to reduce the noise level of a focus error signal Sep. 11, 2012
8254224 Servoing system for master with parallel tracks in a holographic replication system Aug. 28, 2012
8238221 Optical pickup device and recording/reproduction device Aug. 7, 2012
8238210 Optical recording medium, optical recording medium driving apparatus, and optical recording medium driving method Aug. 7, 2012
8213278 System comprising an optical disc and an apparatus for reading of respective data Jul. 3, 2012
8213279 Optical recording medium and optical recording-reading method Jul. 3, 2012
8189436 Optical drive device and amplification rate determining method May. 29, 2012
8165003 Optical pickup device Apr. 24, 2012
8159909 Optical head, optical drive apparatus, and method for generating tracking error signal Apr. 17, 2012
8159908 Photo diode ic Apr. 17, 2012
8154962 Optical pickup and optical information recording and reproducing device Apr. 10, 2012
8134907 Optical head, optical element with diffraction grating, optical disc device and information processing device Mar. 13, 2012
8130600 Drive device, optical head, and optical disk recording/reproducing device Mar. 6, 2012
8111595 Optical disk recording and playback apparatus and signal detection method utilizing a differential push-pull method and a phase difference method Feb. 7, 2012
8107331 Optical disk apparatus, position control method, and optical pickup Jan. 31, 2012
8107345 Optical disk device and optical disk discriminating method Jan. 31, 2012

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15










 
 
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