Method of, and apparatus for, detecting an object
May 15, 2012. 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 ReferencesSingle terminal detection system Reflection light barrier apparatus for recognizing both strongly and weakly reflecting objects Optical sensor device for detecting the presence of an object Measuring system employing a measuring method based on the triangulation principle for the non-contact measurement of a distance from the surface of a contoured object to a reference level. _ System for automatically detecting presence or absence of a preceding vehicle and method therefor Optical-electronic rangefinder Light barrier utilizing two radiation branches each having differently polarized filters Optical proximity sensing optics Detector device for a blade tracking system having two sensors Active-type auto-focusing mechanism InventorApplicationNo. 849435 filed on 05/15/1992US Classes:250/222.1, Inanimate article356/141.1With photodetection of reflected beam angle with respect to a unidirectional source beamExaminersPrimary: Nelms, David C.Assistant: Shami, K. Attorney, Agent or FirmInternational ClassG01V 009/04Foreign Application Priority Data1989-09-15 NLAbstractA method of detecting an object, comprising the steps of generating radiation by means of a source of radiation; emitting the radiation in the direction of the object; and detecting a first radiation component at a first angle of deflection of substantially 180°; measuring a second component of the reflected radiation at a second angle of deflection and performing a first differential measurement between a first intensity signal representing the first radiation component and a second intensity signal representing the second radiation component. Also an apparatus for carrying out the method is described. | |
