Optical recording medium and information record with tracking ai

Details Optical recording medium and information record with tracking ai Optical recording medium and information record with tracking ai

1981-06-12

1983-06-07

Miller, Jr., George H.

Recorders

Record receivers and/or driving means therefor

Laminated, impregnated, or coated bases

346 76L, 369275, 369285, G01G 1902, G01G 1302

Patent

active

043873812

ABSTRACT:
An optical recording medium comprising a substrate, a light absorptive layer overlying the substrate, a buffer layer overlying the absorptive layer and a masking layer having slots therethrough overlying the buffer layer. The invention also includes an information record having information recorded in the absorptive layer as a series of regions of the absorptive layer, underlying the slots in the masking layer, whose optical properties differ from those of the remainder of the absorptive layer. The presence of the slots in this medium can provide a spatially varying recording sensitivity, track identification and a means for obtaining a radial tracking error signal.

REFERENCES:
patent: 4038524 (1977-07-01), Puech et al.
patent: 4090031 (1978-05-01), Russell
patent: 4097895 (1978-06-01), Spong
patent: 4101907 (1978-07-01), Bell et al.
patent: 4176377 (1979-11-01), Howe
patent: 4216501 (1980-08-01), Bell

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