Recording/reproducing apparatus for optical tape

Details Recording/reproducing apparatus for optical tape Recording/reproducing apparatus for optical tape

1992-10-20

1994-11-29

Hannaher, Constantine

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369180, G11B 700

Patent

active

053696310

ABSTRACT:
A recording/reproducing apparatus for an optical tape for optically recording and reproducing information on an optical tape having a thermal converting layer. An optical pickup is divided into two separate parts, one for recording and the other for reproducing, and has an erasing device for optically erasing with the optical pickup for reproducing. The optical pickup for reproducing has a collimating lens for collimating the divergent light beam of a laser diode for reproducing or erasing the information group recorded on at least one track of the optical tape at the same time, a cylindrical lens for focussing the collimated light beam in the vertical direction, and a photodiode array for detecting light reflected from the tape. Also, the optical pickup for reproducing employs an aperture having a square hole for effectively focussing the light beam.

REFERENCES:
patent: 4178615 (1979-12-01), Shimooka et al.
patent: 4970707 (1990-11-01), Hara et al.

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