Optical head having a fixed optical casing and a movable optical

Details Optical head having a fixed optical casing and a movable optical Optical head having a fixed optical casing and a movable optical

1991-11-18

1992-12-29

Psitos, Aristotelis

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4411, 359507, 359513, G11B 700

Patent

active

051757176

ABSTRACT:
An optical head comprises a fixed optical casing and a movable optical casing accommodating a deflecting mirror and an objective lens which moves separately from the deflecting mirror. Windows are inserted in the boundary between the interior and exterior of an optical path to cover a light-exposed area of an optical system so as to prevent dust from entering into the optical casings. Each window is simple in its construction and makes a slight angle with a plane perpendicular to the optical axis of the optical system so that the windows do not become dusty. Each window can be coated with a conductive thin film which is grounded through a conductive area of each optical casing.

REFERENCES:
patent: 4959824 (1990-09-01), Ueda et al.
patent: 4991949 (1991-02-01), Moorehead
patent: 5018033 (1991-05-01), Miyazaki et al.
patent: 5023858 (1991-06-01), Nakayama

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