Optical focusing apparatus for the reading of a data medium movi

Details Optical focusing apparatus for the reading of a data medium movi Optical focusing apparatus for the reading of a data medium movi

1984-01-19

1986-12-30

Psitos, Aristotelis M.

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

360114, 369 45, 369 46, G11B 1100, G11B 700

Patent

active

046334505

ABSTRACT:
Optical apparatus (DISFOCI1 to DISFOCI4) for focusing a beam of light for reading of a data medium moving past it, comprising, a main body (CPLI1 to CPLI4) disposed to fly above the data medium and at least one optical device (OPFOCI1, OPFOCI2, OPFOCI3, OPFOCI4, OPFOCI5) for focusing of the beam, the optical device being located such that its distance in relation to said medium remains constant. The optical device is placed on the main body and is integral with the movement thereof. The apparatus is adpated for optical reading of magnetic optical data.

REFERENCES:
patent: 3530258 (1979-09-01), Gregg et al.
patent: 3947888 (1976-03-01), Jarsen
patent: 3992576 (1976-11-01), Sugiura
patent: 4003059 (1977-01-01), Sugiura et al.
patent: 4475179 (1984-10-01), Geyer
patent: 4510544 (1985-04-01), Lazzan
IBM Technical Disclosure Bulletin, vol. 15, No. 2, Jul. 1972, "Optics for Beam Addressable Files" by R. L. Garwin.
IBM Technical Disclosure Bulletin, vol. 22, No. 3, Aug. 1979, "Video Disk with Updating Feature" by Bruce et al.
Japanese Patent Abstracts Publication, vol. 6, No. 255 (P-162) (1133), Dec. 14, 1982, "Optical Disc Device with Floating Head" by Nippon.

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