Optical system for fast access optical data storage device

Details Optical system for fast access optical data storage device Optical system for fast access optical data storage device

1985-12-20

1987-12-15

Corbin, John K.

350 63, 350 69, G02B 2608

Patent

active

047128879

ABSTRACT:
An optical head structure, movable to scan over a disk surface, includes a fixed optical arrangement. Fine focussing and side-to-side adjustments for scanning are effected by movements of another lens mounted on a substantially stationary part of the system structure. The movable lens is generally aligned with the axis of the fixed lens on the movable head structure. In an alternative embodiment, lateral adjustments of scanning spot position are made by pivoting a reflecting mirror on the stationary structure and axial adjustments of the scanning spot are made by axially moving a lens on the fixed structure. Light paths in the movable head structure are altered by reflecting mirrors, all such mirrors being in fixed relationship with the fixed objective lens. The movable head structure bearing fixed lenses and fixed mirrors mvoes in an arc, not concentric with disk rotation, to traverse the disk and locate a desired track.

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