Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Patent
1994-10-18
1995-07-11
Epps, Georgia Y.
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
369 4414, 369 13, 369112, G11B 700
Patent
active
054327636
ABSTRACT:
A miniature rotary actuator optical head assembly incorporating data and servo detecting elements mounted inside a source/detector module, which is located on the rotary actuator arm adjacent to the pivot point of the rotary actuator arm. The miniature rotary actuator optical head also includes a miniature focus motor which supports a fold mirror and an objective lens and repositions the fold mirror and objective lens simultaneously whenever a focus error is received. The focus motor can be actuated by a magnetic bias field that originates external to the rotary actuator arm, particularly the magnetic bias field generated for magneto-optical recordation. The optical assembly may also include two stage tracking by mounting the light source on a pair of lateral movement flexures and supplying a fine tracking error signal to actuate the movement of the light source.
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Campbell David K.
Marshall Daniel R.
Towner David K.
Baan Cynthia S.
Epps Georgia Y.
Hewlett--Packard Company
Huber P. W.
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