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US 5,848,049 AGranted
Disc player with parallel objective lenses
AssigneePioneer Electronic Corporation
InventorsHiroshi Yokota, Ryuichi Naito, Hiroyuki Hirano, Katsumi Ishii, Shinichi Naohara, Yoshifumi Tsukada, Kanya Matsumoto
Life of this patent
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Abstract
A disc player includes at least one pickup device, which includes a pair of objective lenses for reading information from a disc. The pair of objective lenses are independently movable in the radial direction of the disc by a magnetic field generated by a common magnet.
Claims4
A disc player comprising at least one pickup device, said pickup device comprising:
- a first pickup means movable substantially in a radial direction of a disc for reading information from the disc;
- a second pickup means movable substantially in the radial direction of the disc for reading information from the disc, said first pickup means and said second pickup means being movable independently of and in parallel with each other;
- and
- a common magnet means for generating a magnetic field to move said first pickup means and said second pickup means, said common magnet means being used by said first pickup means and said second pickup means in common and said common magnet means having a longitudinal axis extending in the radial direction of said disc with said first pickup means and said second pickup means being positioned on opposite sides of said longitudinal axis.
1 more element
Dependencies are inferred from the claim text.