Light-measuring systems
Patent 3945732 Issued on March 23, 1976. Estimated Expiration Date: 
March 23, 1993. 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 23, 1993. 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 3651744 3652168 3772517 InventorAssigneeApplicationNo. 456380 filed on 03/29/1974US Classes:356/222, Plural detectors356/226, Detector and indicator electrical coupling (e.g., amplifying or attenuating)396/233Having plural photocellsExaminersPrimary: Smith, Alfred E.Assistant: Clark, Conrad J. Attorney, Agent or FirmForeign Application Priority Data1973-03-30 JAAbstractA light-responsive system which includes a plurality of photosensitive elements respectively directed to different parts of a scene for respectively providing electrical inputs according to the brightness of the light at the different parts of the scene. The several inputs are supplied to a plurality of electrical circuits which in turn are connected with an output unit, these circuits operating in such a way that the output unit will be actuated only by that one of the inputs which corresponds to that part of the scene which has the maximum brightness or the minimum brightness. In this way it is possible to provide an output corresponding either to the maximum brightness of the scene or the minimum brightness of the scene without requiring scanning of the scene. | |
