ApplicationNo. 06/585476 filed on 03/02/1984
US Classes:250/458.1, LUMINOPHOR IRRADIATION250/461.1, With ultraviolet source250/472.1INVISIBLE RADIATION RESPONSIVE NONELECTRIC SIGNALLING
ExaminersPrimary: Howell, Daniel W.
Attorney, Agent or Firm
International ClassesG07D 7/12 (20060101)
G07D 7/00 (20060101)
Foreign Application Priority Data1983-03-03 NL
AbstractProcess and apparatus for checking the authenticity of valuable documents by subjecting the document to be checked in a closed room to at least incident light, transmitting and floodlight, especially floodlight at angles of 0 tot 15°. Apparatus is described with document examination places without relative interference of the different radiation.