Range detecting method and apparatus
Patent 4178098 Issued on December 11, 1979. Estimated Expiration Date: 
January 5, 1998. 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.
January 5, 1998. 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 3898676 Auto-focus camera with solid state range finder Integrated automatic ranging device for optical instruments Patent #: 4004852 InventorsAssigneeApplicationNo. 05/867343 filed on 01/05/1978US Classes:356/3.15, With one viewing axis fixed250/201.8, Based on image shift396/116Scanning typeExaminersPrimary: Buczinski, S. C.Attorney, Agent or FirmInternational ClassG02B 7/30 (20060101)Foreign Application Priority Data1977-01-06 JPAbstractA range detecting method and apparatus in which a first and a second image of an object each having a relative positional parallax corresponding to the object distance formed by a range finding optical system are purely electrically scanned by the use of one or more photosensor arrays and the resulting image scan signals in analog form relating to the first and second images are applied to first and second analog storing devices for storage therein, in which coincidence or non-coincidence between the analog image scan signals is detected by coincidence detecting drive while one of these image scan signals is shifted bit by bit relative to the other image scan signal, thereby counting an amount of shift bits required until the image scan signals of the same bit number relating to the first and second images are rendered most appropriately coincident with each other, whereby the object distance may be known from such amount of shift bits. | |
