Stock material or miscellaneous articles – Circular sheet or circular blank – Recording medium or carrier
Patent
1989-03-23
1990-05-22
Ryan, Patrick
Stock material or miscellaneous articles
Circular sheet or circular blank
Recording medium or carrier
428 65, 428209, 428690, 428704, 428913, 346 11, 346762, 3461351, 369288, 369108, B32B 302
Patent
active
049276816
ABSTRACT:
Recording medium having islands of light-emitting material in regions formed between a transparent substrate, and a reflective layer disposed on one principal surface thereof. The islands of light-emitting material are sensitive to illuminating light incident thereupon, and in response thereto, emit light having a different wavelength than said illuminating light. Reproducing apparatus separates an overall reflected light from the recording medium into first reflected light corresponding to a reflected scanning light, and second reflected light corresponding to emitted light from the light emitting material.
REFERENCES:
patent: 4090031 (1978-05-01), Russell
patent: 4219704 (1980-08-01), Russell
patent: 4268840 (1981-05-01), Schank et al.
Pioneer Electronic Corporation
Ryan Patrick
LandOfFree
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