Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Drum record
Patent
1988-06-27
1989-04-04
Faber, Alan
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Drum record
360 84, 350420, G11B 552
Patent
active
048190969
ABSTRACT:
Rotary scanner apparatus includes a magnetic head on the periphery of a rotatable headwheel having a central axis of rotation, and an off-axis light source for projecting a collimated beam of information-bearing light obliquely onto a planar photodetector on the axis of the headwheel. To optimize electro-optical "action", and thereby enhance signal-to-noise ratio, optical apparatus, interposed between the light source and the photodetector, has an optical characteristic for shaping the light beam, to cuase the size and shape of its cross section, at a plane of incidence coinciding with the photodetector, to correspond substantially to the size and shape of the light-sensitive surface of the photodetector. Preferably, the optical apparatus includes a prism pair of performing anamorphic beam contraction, to convert the beam shape to circular, in its plane of incidence.
REFERENCES:
patent: 3860747 (1975-01-01), Orii et al.
patent: 3893129 (1975-07-01), Endo et al.
patent: 4203668 (1980-05-01), Chapman
patent: 4444459 (1984-04-01), Woodwell
patent: 4455584 (1984-06-01), Heitmann
patent: 4470662 (1984-09-01), Mumzhiu
patent: 4490608 (1984-12-01), Yeadon et al.
patent: 4542492 (1985-09-01), Leterme et al.
patent: 4594699 (1986-06-01), Browder
patent: 4607356 (1986-08-01), Bricot et al.
patent: 4623225 (1986-11-01), Forkner
patent: 4627690 (1986-12-01), Fantone
patent: 4643538 (1987-02-01), Wilson
Grant Frederic F.
Grant John P.
Datatape Incorporated
Faber Alan
Monteith Dennis P.
Young W. R.
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