Title: Three dimensional electro-optical retrieval system

Abstract: A system for sensing information located in tracks in various layers or depths of a recording medium. The desired information is electro-optically tracked in three dimensions to provide sensing of the information contained in the multi-layered recording medium.

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Inventors: Wohlmut, Peter G. (Palo Alto, CA, US)
Neu, Frank D. (Castro Valley, CA, US)

Application Number: 472080
Filing Date: 1974-05-22
Publication_date: 1976-03-23
Assignee: Videonics of Hawaii, Inc. (Honolulu, HI)
Primary Class(es): 369/44.13 365/127, 369/30.1, 369/59.1, 369/94
Other Classes:
US Patent Ref:

3518442	Jun, 1970	Johnson	179/100.
3626386	Dec, 1971	Feinleib	340/173.
3820087	Jun, 1974	Chaudhari	340/173.

Other Refs:
Primary Examiner: Fears, Terrell W.
Assistant Examiner:
Attorney: Lyon & Lyon