Position sensing for an optical recording actuator

Details Position sensing for an optical recording actuator Position sensing for an optical recording actuator

1996-06-07

1998-04-07

Young, W. R.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 54, G11B 7095

Patent

active

057372888

ABSTRACT:
An optical recording actuator is disclosed and includes a base and a moveable actuator lens holder having its position controlled between two to six degrees of freedom of motion. Such lens holder including an objective lens. The actuator further includes a sensing system a light source and three sensors and mounted on the moveable lens holder three separate plates, each corresponding to a sensor and having an aperture and arranged so that light from the source passes through the aperture of each plate and illuminates its corresponding sensor mounted on the base. Each sensor includes an arrangement for providing position detection in two orthogonal directions and a microprocessor responsive to the position detection to determine the position of the moveable lens holder with respect to the base in six degrees of freedom of motion.

REFERENCES:
patent: 5321678 (1994-06-01), Takishima et al.
patent: 5347503 (1994-09-01), Koyama et al.
patent: 5455811 (1995-10-01), Tanaka
patent: 5504724 (1996-04-01), Yang

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