Title:
【発明の名称】銀行券及び類似の紙の証券の本物であるかどうかの光学的試験
Document Type and Number:
Japanese Patent JPH05502126
Kind Code:
A
Abstract:
PCT No. PCT/NO90/00132 Sec. 371 Date Mar. 3, 1992 Sec. 102(e) Date Mar. 3, 1992 PCT Filed Aug. 17, 1990 PCT Pub. No. WO91/03031 PCT Pub. Date Mar. 7, 1991.A method and a means for checking genuineness of paper money are based upon detection of the characteristic difference in the printing process for genuine bank notes and counterfeit bills produced with a color copying machine. The detection is conducted in narrow wavelength bands respectively in typical red and blue color ranges, and simultaneously in particular directions, with reflected and scattered light. Detection of intensity in a correspondingly narrow band near the maximum sensitivity range of the eye, i.e. in the green range, and in another direction, is also conducted for reference purposes. Preferably the measurement is made in a particularly selected point where the contents of blue and red in the print of the genuine bank note is at an extremum, i.e. high or low.
Inventors:
Gottus einer
Application Number:
JP51150690A
Publication Date:
April 15, 1993
Filing Date:
August 17, 1990
Export Citation:
Assignee:
Tadalaboi
International Classes:
G07D7/00; G07D7/12; G07D7/20; (IPC1-7): G07D7/00
Attorney, Agent or Firm:
Yu Saito (2 outside)