Title:
OPHTHALMOLOGIC DIAGNOSTIC APPARATUS
Document Type and Number:
Japanese Patent JP3636533
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To enable tracking continuously even when the motion of eyegrounds is substantial.
SOLUTION: A system control section judges that the end of an indicator T is outside the line of a circle S by a signal of a control circuit for driving a galvanometric mirror when an angle of rotation of the galvanometric mirror exceeds 1.5° and sends a signal to a transmission type liquid crystal plate to give a warning to a subject by flashing a dot pattern which is shown as fixation target. This allows the turning of the visual axis to the fixation target again thereby avoiding the disabling of tracking.
Inventors:
Yasuyuki Numajiri
Application Number:
JP8206396A
Publication Date:
April 06, 2005
Filing Date:
March 11, 1996
Export Citation:
Assignee:
Canon Inc
International Classes:
A61B3/10; A61B5/026; (IPC1-7): A61B3/10; A61B5/026
Domestic Patent References:
| JP7163532A | ||||
| JP8010225A | ||||
| JP62286432A | ||||
| JP5168597A | ||||
| JP5020692A | ||||
| JP4312074A |
Attorney, Agent or Firm:
Yasuhiko Hibiya