[n: Characterised By The Shape Of Individual Detector Elements] {g11b 7/13b} Patents (Class G9B/7.135)
  • Publication number: 20130010584
    Abstract: There are provided an optical head and an optical information device capable of downsizing the optical head, and capable of improving the qualities of a focus error signal, a tracking error signal, and a reproduction signal. A light detector (120) includes a light-receiving unit (121) for receiving a reflected light beam from an optical disc, and a package (125) for covering the light-receiving unit (121). The package (125) has a plurality of light guides (124) formed on a light-receiving surface on the light beam incident side of the light-receiving unit (121), and for guiding a reflected light beam to the light-receiving unit (121), and a light shield (114) for shielding a region except for a plurality of the light guides (124) from light.
    Type: Application
    Filed: March 18, 2011
    Publication date: January 10, 2013
    Inventors: Hideki Nakata, Hidenori Wada, Masahito Nakao