Optical: systems and elements – Lens – With support
Patent
1996-06-12
1997-06-03
Young, W. R.
Optical: systems and elements
Lens
With support
359824, 369 4416, G02B 702, G11B 7095
Patent
active
056360681
ABSTRACT:
An electromagnetic objective lens driving apparatus of an optical disc data recording and reproducing apparatus is provided. The apparatus includes a carriage that is movable in a radial direction of the optical disc, and an objective lens holder that is supported on the carriage to move in focusing and tracking directions of the optical disc. Focusing and tracking magnetic driving circuits are provided for mounting on the objective lens holder and include focusing and tracking magnetic coils associated with focusing and tracking permanent magnets. A pair of magnetic members are also provided on the objective lens for receiving magnetic attractive forces of the focusing and tracking permanent magnets, such that in a neutral position, the attractive forces received by the magnetic members are substantially the same and in a non-neutral position, the attractive forces received by one of the magnetic members are greater than the attractive forces received by the other magnetic member.
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Asahi Kogaku Kogyo Kabushiki Kaisha
Young W. R.
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