Optical disk recording and reproducing apparatus and method and

Details Optical disk recording and reproducing apparatus and method and Optical disk recording and reproducing apparatus and method and

1998-09-23

2000-10-31

Huber, Paul W.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 54, G11B 700

Patent

active

061413054

ABSTRACT:
In an optical disk recording and reproducing apparatus, a brake operation timing signal (H) is generated by a brake operation timing signal generating unit (8) from an RF signal and a tracking error signal delivered from an optical pickup which is provided with an objective lens (5) converging a laser light and irradiating the same on an optical disk 1, a light receiving portion receiving a return light from the optical disk and an objective lens actuator (6), while a shock sensor output (L) from a shock sensor (7) is compared with a predetermined level by a shock level comparing unit 12. Under the control of a control unit (11), only when the output from the shock sensor (7) exceeds a predetermined value, a brake operation to suppress a track jump is carried out by an actuator drive circuit unit (10) based on the brake operation timing signal (H), to thereby suppress a track jump caused by an impact from the outside.

REFERENCES:
patent: 5677899 (1997-10-01), Getreuer
patent: 5974007 (1999-10-01), Getreuer

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