Illumination devices for inspection systems
Patent 4893223 Issued on January 9, 1990. Estimated Expiration Date: 
January 10, 2009. 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 10, 2009. 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 ReferencesMethod and apparatus for inspecting articles Light emitting diode array having uniform illuminance distribution Patent #: 4814667 InventorAssigneeApplicationNo. 295277 filed on 01/10/1989US Classes:362/252, Particular arrangement (e.g., ornamental star)356/237.1, INSPECTION OF FLAWS OR IMPURITIES362/11, Plural light sources or light source supports362/33, WORK-TABLE LIGHTING SYSTEM362/234, Combined362/800LIGHT EMITTING DIODEExaminersPrimary: Husar, Stephen F.Attorney, Agent or FirmInternational ClassF21V 033/00AbstractIllumination devices for an inspection system which holds the article to be inspected in a particular location and having light emitting diodes disposed in a part spherical array to cause light to converge upon a restricted field of view in which the article is located. The device is of particular use for illuminating small articles which need to be inspected. The light emitting diodes are preferably operated selectively in groups to provide different light patterns upon the article under inspection. | |
