Method and an apparatus for measuring optical characteristics of

Details Method and an apparatus for measuring optical characteristics of Method and an apparatus for measuring optical characteristics of

1989-06-02

1990-07-10

McElheny, Jr., Donald

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 58, G11B 7095

Patent

active

049411381

ABSTRACT:
This invention relates to a method and an apparatus for measuring optical characteristics such as Mueller matrices or double refraction of an optical disk in which a laser light which is focussed irradiates on an optical disk so that a tracking and a focus of the irradiation light is controlled based on the reflected light from the optical disk while polarization characteristics of the optical disk are measured based on the reflection light.

REFERENCES:
patent: 4079429 (1978-03-01), Travot et al.
patent: 4167024 (1979-09-01), Hamisch
patent: 4443873 (1984-04-01), Anthon
patent: 4551819 (1985-11-01), Michl et al.
patent: 4660187 (1987-04-01), Yoshino et al.
patent: 4691308 (1987-09-01), Takagi et al.

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