Optical head system having super resolution element

Details Optical head system having super resolution element Optical head system having super resolution element

1995-05-16

1997-02-04

Young, W. R.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369112, G11B 7095

Patent

active

056006144

ABSTRACT:
An optical head system for detecting information recorded on an optical recording medium is provided. In one preferred embodiment, the optical head system has a super resolution element includes a polarization phase shift plate positioned between a 1/4 wavelength plate and polarization beam splitter so as to be able to adjust the distance between the polarization phase shift plate and an object lens. In this preferred embodiment, the polarization phase shift plate, 1/4 wavelength plate, and object lens are driven together by an actuator.

REFERENCES:
patent: 5072437 (1991-12-01), Chikuma
patent: 5349592 (1994-09-01), Ando
Patent Abstracts of Japan, vol. 18, No. 522, (P-1808), & JP6-180853, Sep. 30, 1994.

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