[n: Where The Characterising Optical Element Is A Mirror (galvanomirrors G9b/7.053)] {g11b 7/135d} Patents (Class G9B/7.116)
  • Publication number: 20130235708
    Abstract: A system and method for providing direct read after write functionality in an optical data storage device include an optical head having a first coherent light source modulated at higher power during writing of data to the optical medium and a second coherent light source operating in a continuous wave mode at lower power while the first coherent light source is writing data. Optic components combine light from the first and second light sources and focus light from the first coherent light source to a first spot of a selected track on the optical medium and focus light from the second coherent light source to a second spot on the selected track downstream from the first spot relative to movement direction of the optical medium to read and verify the data directly after writing during the write process rather than in a separate verification process.
    Type: Application
    Filed: March 9, 2012
    Publication date: September 12, 2013
    Applicant: ORACLE INTERNATIONAL CORPORATION
    Inventor: Scott D. Wilson
  • Publication number: 20130107693
    Abstract: An optical pickup apparatus includes: first and second laser diodes to emit first and second laser beams having first and second wavelengths for reading signals recorded in first and second optical discs, respectively; a first objective lens configured to condense the first laser beam onto the signal recording layer of the first optical disc; a second objective lens arranged, along with the first objective lens, in a radial direction of the first and the second optical discs, the second objective lens configured to condense the second laser beam onto the signal recording layer of the second optical disc; a first optical system configured to guide the first laser beam from the first laser diode to the first objective lens; and a second optical system configured to guide the second laser beam from the second laser diode to the second objective lens independently of the first optical system.
    Type: Application
    Filed: October 25, 2012
    Publication date: May 2, 2013
    Applicants: SANYO OPTEC DESIGN CO., LTD., SANYO ELECTRIC CO., LTD.
    Inventors: SANYO ELECTRIC CO., LTD., SANYO OPTEC DESIGN CO., LTD.
  • Publication number: 20130100793
    Abstract: A optical pickup includes: a laser diode; a driver including a first output end of a laser diode drive current; a first line electrically connected to the first output end of the driver and a first port of the laser diode; a second line provided adjacent to the signal line at at least one location or more and electrically connected to a second port of the laser diode; a printed circuit board including the first and second lines; and a metal heat dissipation cover for the driver. The first and second lines form a two layer structure in which the first and second lines are vertically disposed. The line width of the line provided close to the heat dissipation cover is wider than the line width of the other line between the first and second lines in the two layer structure.
    Type: Application
    Filed: October 25, 2012
    Publication date: April 25, 2013
    Inventors: Hitachi Consumer Electronics Co., Ltd., Hitachi-LG Data Storage, Inc.
  • Publication number: 20120120785
    Abstract: Provided is an optical pickup device which suppresses the decrease of light amount and performs conversion to circular polarization light, wherein the optical pickup device includes a beam splitter and a raising mirror on each of which a layered member is formed, and the optical pickup device satisfies conditional expressions relating to intensities of S-polarized light and P-polarized light with respect to the beam splitter of a laser beam emitted from a semiconductor laser element, reflecances of S-polarized light and P-polarized light on the beam splitter, a reflection phase difference obtained by subtracting a phase of S-polarized light from a phase of P-polarized light after the reflection, reflectances of S-polarized light and P-polarized light on the raising mirror, and a reflection phase difference obtained by subtracting a phase of S-polarized light from a phase of P-polarized light after the reflection.
    Type: Application
    Filed: July 6, 2010
    Publication date: May 17, 2012
    Applicant: Konica Minolta Opto, Inc.
    Inventor: Hidetaka Jidai