Title:
眼科用機器のための位置合わせシステム
Document Type and Number:
Japanese Patent JP4034166
Kind Code:
B2
Abstract:
An alignment system for an ophthalmic instrument comprises an optical axis along which an operator can directly view the patient's eye and the patient can fixate on a dark fixation target surrounded by a bright background that helps to illuminate the eye for operator viewing. A position detection system utilizing stored geometrical relationships determined by multiple regression during instrument calibration compu tes X-Y-Z alignment status of the instrument relative to a patient's eye based on local x -y position information from a pair of lateral detectors receiving corneally reflected light from a corresponding pair of lateral light sources. A heads -up display im age is provided along an optical axis of the instrument for supplying instructive cues to an operator for moving the instrument to achieve alignment based on signal information from the position detection system, whereby the operator sees both a direct mac ro-image of the patient's eye and the display image. The alignment system is particularly suitable for use in hand-held ophthalmic instruments.
Inventors:
Chris Percival
Douglas H, Hoover
Douglas H, Hoover
Application Number:
JP2002316020A
Publication Date:
January 16, 2008
Filing Date:
October 30, 2002
Export Citation:
Assignee:
Reichert Inc.
International Classes:
A61B3/10; A61B3/113; A61B3/16; A61B3/12
Domestic Patent References:
| JP1256923A | ||||
| JP48063592A | ||||
| JP11313800A | ||||
| JP4002328A | ||||
| JP7124111A | ||||
| JP63139529A | ||||
| JP11113852A |
Foreign References:
| US3756073 | ||||
| US4881807 |
Attorney, Agent or Firm:
Takahisa Kimura