Optical permitting record/playback from both sides of an optical

Details Optical permitting record/playback from both sides of an optical Optical permitting record/playback from both sides of an optical

1988-09-09

1990-05-15

Richardson, Robert L.

Cutlery

369199, G11B 700

Patent

active

049264095

ABSTRACT:
An optical assembly of an optical recording/reproducing apparatus for focusing an optical beam produced by a light source on a recording medium and for directing the optical beam reflected back from the recording medium to detectors comprises a first optical system including a first objective lens for focusing an optical beam on a first recording surface at a first side of a recording medium, a second optical system including a second objective lens for focusing the optical beam on a second recording surface at a second side of the recording medium, and an optical path switching means switched between a first and second states for selectively establishing an optical path connecting an optical processing unit including the light source and detectors to either one of the first and second optical subsystems.

REFERENCES:
patent: 3774172 (1973-11-01), Silverman
patent: 4416003 (1983-11-01), Suzuki
patent: 4566087 (1986-01-01), Kraft

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