Wavelength multiplexing optical recording apparatus

Details Wavelength multiplexing optical recording apparatus Wavelength multiplexing optical recording apparatus

1987-12-02

1990-03-13

Stephan, Steven L.

Dynamic information storage or retrieval

Systems having plural physically distinct independent tracks...

Having layered storage medium

250226, 250201, 369 45, 369108, G11B 1100

Patent

active

049088130

ABSTRACT:
Disclosed is a wavelength multiplexing optical recording apparatus comprising laser sources radiating a plurality of laser beams of different wavelengths, an optical system for focusing the laser beams, and an optical recording medium having a plurality of optical recording layers with wavelength sensitivities for selective recording by said laser beams focused by said optical system. The optical recording layers of recording medium are laminated with distances between adjacent layers being made consistent with biased focal positions of the laser beams attributable to the chromatic aberration of the optical system, so that the laser beams are focused on the optical recording layers of corresponding wavelength sensitivities.

REFERENCES:
patent: 4161752 (1979-07-01), Basilico
patent: 4219704 (1980-08-01), Russell
patent: 4450547 (1984-05-01), Nakamura et al.
patent: 4525826 (1985-06-01), Nakamura et al.
patent: 4737947 (1988-04-01), Osato et al.
Jenkins and White, Fundamentals of Optics, York, Pa, McGraw-Hill Book Co 1957, pp. 157-163.

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