Apparatus for regenerating information from records made by...

G - Physics – 11 – B

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G11B 7/00 (2006.01) G11B 7/0045 (2006.01) G11B 7/005 (2006.01) G11C 7/00 (2006.01) G11C 13/04 (2006.01)

Patent

CA 1323101

APPARATUS FOR REGENERATING INFORMATION FROM RECORDS MADE BY OPTICAL-WAVELENGTH-MULTIPLEXING METHOD Abstract of the Disclosure: An apparatus for reproducing information from records made by an optical-wavelength-multiplexing method which includes a first medium acting as a data carrier which data can be recorded on and reproduced from by the optical- wavelength multiplexing method and which further includes a second medium having the same characteristic as that of the first medium on which no records have been made, wherein components of light reflected or transmitted by the first and second mediums are then detected by a first and second photodetectors, respectively, and wherein the outputs of the first and second photodetectors are further processed so that a ground level of the "reproduced signal" is adjusted to substantially constant value.

572063

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