Optical pickup device and optical disc device
AssigneeSony Corporation
InventorTomoaki Morishita
Life of this patent
Estimating the term…
Abstract
An optical pickup device is positioned in confronting relationship to an optical disc for reading an information signal from and/or writing an information signal on the optical disc. The optical pickup device includes an optical unit having at least a light source for emitting a light beam and a photodetector for detecting a light beam returned from the optical recording medium, and a converging system for converging the light beam emitted from the light source onto a signal recording surface of the optical recording medium. The optical unit includes a light guide for guiding the light beam toward the converging system and a light-transmissive optical plate covering the light guide.
Claims12
An optical pickup device adapted to be positioned in confronting relationship to an optical recording medium for reading an information signal from and/or writing an information signal on the optical recording medium, comprising:
- an optical unit having at least a light source for emitting a light beam and a photodetector for detecting a light beam returned from the optical recording medium;
- a converging system for converging the light beam emitted from said light source onto a signal recording surface of the optical recording medium;
- said optical unit further comprising a light guide for guiding the light beam toward said converging system and a light-transmissive optical plate covering said light guide;
- and
- an objective lens, wherein said light-transmissive optical plate is mounted on said optical unit and is located between said converging system and said optical unit;
- and
- wherein said optical unit has burr receptacle grooves defined therein in surrounding relation to a bottom surface of a recess, for receiving burrs on peripheral edges of said light-transmissive optical plate, said light-transmissive optical plate being securely fitted in intimate contact with the bottom surface of said recess.
An optical disc device adapted to be positioned in confronting relationship to an optical disc for reading an information signal from and/or writing an information signal on the optical disc, comprising:
- a drive mechanism for rotating the optical disk;
- an optical pickup comprising an optical unit having at least a light source for emitting a light beam and a photodetector for detecting a light beam returned from the optical disc;
- and a converging system for converging the light beam emitted from said light source onto a signal recording surface of the optical disc;
- and
- a moving mechanism for moving said optical pickup with respect to the optical disc in a radial direction of the optical disc;
- said optical unit further comprising a light guide for guiding the light beam toward said converging system and a light-transmissive optical plate covering said light guide;
- wherein said light-transmissive optical plate is mounted on said optical unit and is located between said converging system and said optical unit;
- and
- wherein said optical unit has burr receptacle grooves defined therein in surrounding relation to a bottom surface of a recess, for receiving burrs on peripheral edges of said light-transmissive optical plate, said light-transmissive optical plate being securely fitted in intimate contact with the bottom surface of said recess.
Dependencies are inferred from the claim text.