Title:
FINGERPRINT IMAGE INPUT DEVICE
Document Type and Number:
Japanese Patent JPS58201178
Kind Code:
A
Abstract:
PURPOSE: To obtain data on invariable the same condition by picking up an image of a finger print when a body is pressed with a finger to pressure at plural points within the same range.
CONSTITUTION: The finger 1 is pressed against a prism 2, and its pressure is transmitted to a pressure sensitive part 4 through springs 3. Only when the pressure at each position is greater than a specific value or within some range, the pressure sensitive part 4 turns on, i.e. sends a signal "1" to an AND gate 5. When all pressure sensitive parts 4 send out signals "1", a controller 6 drives a light source 8 and an image sensor part 7 to pick up an image of the fingerprint.
Inventors:
SHIMIZU AKIHIRO
HASE MASAHIKO
ISHINO YOSHINOBU
DOI KIICHI
HASE MASAHIKO
ISHINO YOSHINOBU
DOI KIICHI
Application Number:
JP8399582A
Publication Date:
November 22, 1983
Filing Date:
May 20, 1982
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE
International Classes:
G06K9/00; G06T7/00; G06T1/00; (IPC1-7): G06K9/00
Attorney, Agent or Firm:
Masataka Kobayashi