Digital auto focus
Patent 4078171 Issued on March 7, 1978. Estimated Expiration Date: 
March 7, 1995. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
March 7, 1995. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3532045 3791735 3832058 3846628 3859518 3875401 InventorAssigneeApplicationNo. 05/696170 filed on 06/14/1976US Classes:250/201.8, Based on image shift396/128Image correlation typeExaminersPrimary: Smith, Alfred E.Assistant: Moore, David K. Attorney, Agent or FirmInternational ClassG01C 3/08 (20060101)AbstractA digital auto focus system includes first and second detector arrays which receive first and second detection images of an object. The detection images are displaced by a number n of detectors depending upon the distance between the object and the detector arrays. The output signals of the detector arrays are processed to provide a signal indicative of the number n. This signal may be used, for example, to control the position of a lens in a photographic system. | |
