Aberration correcting apparatus and information recording medium

Details Aberration correcting apparatus and information recording medium Aberration correcting apparatus and information recording medium

1998-03-05

2000-09-26

Tran, Thang V.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369112, G11B 709

Patent

active

061250880

ABSTRACT:
An aberration correcting apparatus corrects an aberration of a beam emitted from a light source and focused on an information recording medium by an optical system. The aberration correcting apparatus includes a wave front aberration correcting unit aligned in an optical path between the light source and the information recording medium for correcting a wave front aberration of an incident beam by changing a refractive index corresponding to an applied voltage. A detector assembly detects a tilt-angle of the information recording medium, and a controller controls the wave front aberration correcting unit corresponding on an output of the detector assembly.

REFERENCES:
patent: 5859818 (1999-01-01), Tateishi et al.
patent: 5914923 (1999-06-01), Araki et al.
patent: 5936923 (1999-08-01), Ootaki et al.

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