Title:
METHOD FOR MARKING AND RECOGNIZING DOCUMENT
Document Type and Number:
Japanese Patent JPH09119867
Kind Code:
A
Abstract:
To provide a method for putting a mark which is invisible under ordinary visual conditions but can be detected under special conditions.
A marking material containing a Raman detectable component exhibiting Raman spectrum upon irradiation with monochromatic radiation is applied to a recording sheet thus putting a mark thereon. The mark on the recording sheet is then irradiated with monochromatic radiation and Raman spectrum is measured for the radiation scattered by the mark.
Inventors:
PIITAA EMU KAZUMAIAA
ERUUIN BANSERU
HAABAATO EFU SHIYAABUERU
ERUUIN BANSERU
HAABAATO EFU SHIYAABUERU
Application Number:
JP21886996A
Publication Date:
May 06, 1997
Filing Date:
August 20, 1996
Export Citation:
Assignee:
XEROX CORP
International Classes:
G01J3/44; B41M3/00; B41M3/14; C09D11/00; G03G9/09; G03G15/00; G03G21/04; G06K7/12; G06K19/14; G07D7/06; (IPC1-7): G01J3/44; G06K7/12
Attorney, Agent or Firm:
Minoru Nakamura (7 outside)