Title:
DEVICE AND METHOD FOR DETECTING PUPIL
Document Type and Number:
Japanese Patent JP2004261598
Kind Code:
A
Abstract:
To provide a method and a device for detecting pupil.
The method comprises a first light ejected from a first light source 103 at a first irradiation angle 110 to the axis 107 of a detector 101, and a second light ejected from a second light source 105 at a second irradiation angle 112 to the axis 107, wherein the first light is approximately equal to the second light in intensity, and the second irradiation angle is greater than the first irradiation angle. The reflected first light and the reflected second light are accepted by a detector to determine a difference between them. The difference can be used to detect the pupil of a subject's eye.
Inventors:
HAVEN RICHARD EARL
ANVAR DAVID JAMES
FOUQUET JULIE ELIZABETH
WENSTRAND JOHN STEWART
ANVAR DAVID JAMES
FOUQUET JULIE ELIZABETH
WENSTRAND JOHN STEWART
Application Number:
JP2004052842A
Publication Date:
September 24, 2004
Filing Date:
February 27, 2004
Export Citation:
Assignee:
AGILENT TECHNOLOGIES INC
International Classes:
A61B3/113; G06K9/00; G08B21/06; A61B5/18; (IPC1-7): A61B3/113
Domestic Patent References:
| JPH08159733A | 1996-06-21 | |||
| JPH10221016A | 1998-08-21 |
Attorney, Agent or Firm:
Shoichi Okuyama
Arihara Koichi
Matsushima Tetsuo
Arihara Koichi
Matsushima Tetsuo