US PATENT SUBCLASS 369 / 44.14
.~.~ Optical head servo system structure

Current as of: June, 1999
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369 /   HD   DYNAMIC INFORMATION STORAGE OR RETRIEVAL

43  DF  WITH SERVO POSITIONING OF TRANSDUCER ASSEMBLY OVER TRACK COMBINED WITH INFORMATION SIGNAL PROCESSING {1}
44.11  DF  .~ Optical servo system {12}
44.14.~.~ Optical head servo system structure {4}
44.15  DF  .~.~.~> Elastic, flexible, pliant or spring support of lens or mirror {1}
44.17  DF  .~.~.~> Optical head element with rotary motion {3}
44.22  DF  .~.~.~> Lens or mirror floats, (e.g., magnetic field support or lens/mirror can freely float and pivot about its own axis, etc.)
44.23  DF  .~.~.~> Structure for shaping beam or causing astigmatic condition {1}

DEFINITION

Classification: 369/44.14

Optical head servo system structure:

(under subclass 44.11) Subject matter including structural detail of the mechanisms for focussing or tracking.

(1) Note. Optical head is defined as a device for producing a focused beam of light on a medium containing information and detecting the light reflected from the medium to determine the information content of the medium.

SEE OR SEARCH CLASS

359, Optics: Systems (Including Communication) and Elements,

197+, and 819+ for optical heads in general, with or without servo system combination, when no recording/playback or combination with the recording medium is claimed.