Patent ID: 6185180
Filing Date: 2001-02-06
Classification: G11B

Abstract:
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; andan 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; andwherein 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.