Multi-beam split-type optical head for use in optical disk appar

Details Multi-beam split-type optical head for use in optical disk appar Multi-beam split-type optical head for use in optical disk appar

1994-11-01

1996-09-10

Levy, Stuart S.

Dynamic information storage or retrieval

Dynamic mechanism subsystem

Having power driven transducer assembly

369 4414, G11B 7135, G11B 708

Patent

active

055555390

ABSTRACT:
A multi-beam split-type optical head has optics including a stationary section and a movable section. A plurality of light beams generated from a plurality of light sources in the stationary section are parallel to a shifting direction of the movable section until entering the movable section, are then overlapped by a mirror or a dichroic mirror in the movable section such that they are mutually inclined with an angle .theta. therebetween, and converge at a plurality of positions each spaced by a predetermined distance on a track of an optical disk. The reflected light beams from the optical disk return to a detection optical system through the reverse itinerary.

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IEEE Spectrum, Oct. 1994, p. 62.
"A New Composite Tracking Method for Two-Beam Split-type Optical Head", optical memory symposium held at Makuhari Messe in Japan on Jul. 9, 1990 (English abstract).

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