Title:
INFRARED LUMINOUS FLUORESCENT SUBSTANCE, FLUORESCENT SUBSTANCE COMPOSITION, MATERIAL CARRYING FLUORESCENT SUBSTANCE THEREON, LATENT IMAGE MARK-FORMING MEMBER, OPTICAL READER AND OPTICAL READING SYSTEM
Document Type and Number:
Japanese Patent JPH07331239
Kind Code:
A
Abstract:
PURPOSE: To obtain an infrared luminous fluorescent substance, containing iron and erbium as optically active elements, absorbing light in a wide region of visible to near infrared rays and excitable by exposure to exciting light and capable of emitting infrared rays.
CONSTITUTION: This fluorescent substance contains iron (Fe) and erbium (Er) as optically active elements and preferably further at least one selected from the group of scandium (Sc), gallium (Ga), aluminum (Al), indium (In), yttrium (Y), bismuth (Bi), cerium (Ce), gadolinium (Gd), lutetium (Lu) and lanthanum (La).
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Inventors:
TAKEUCHI YOJI
MATSUOKA HIDEAKI
ISHIZUKA TOMOAKI
OSHIMA TOSHIO
MATSUOKA HIDEAKI
ISHIZUKA TOMOAKI
OSHIMA TOSHIO
Application Number:
JP12637794A
Publication Date:
December 19, 1995
Filing Date:
June 08, 1994
Export Citation:
Assignee:
HITACHI MAXELL
International Classes:
C01G49/00; C09K11/00; C09K11/62; C09K11/78; C09K11/80; G06K7/12; G11B7/24012; G11B7/24035; G11B7/2433; (IPC1-7): C09K11/62; C09K11/62; C01G49/00; C09K11/00; C09K11/78; C09K11/80; G06K7/12
Attorney, Agent or Firm:
Kenjiro Take
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