Title:
VIDEO OPTO-DIAGNOSTIC INSTRUMENT WITH SINGLE-ADJUSTMENT FOCUS
Document Type and Number:
WIPO Patent Application WO2000007496
Kind Code:
A8
Abstract:
This invention is a hand-held ophthalmoscope (10) modified by the removal or augmentation of the focusing wheel, and the addition of a manual or automatic focusing lens system (12). An electronic imager (CCD array or video camera) (16) is placed optically conjugate to a viewing screen (18) such that focus operations performed by the Examiner to adjust the image seen by the Examiner on the screen also focuses the image on the electronic imager. This is accomplished by an optical system which includes a straight path from the viewing screen to the patient's eye with a beam splitting (14) interposed to cause the image of the patient's eye to be reflected onto the electronic imager. As a result, when the Examiner uses the focusing lens system (12), manual or automatic, positioned between the beam splitting (14) and the patient's eye, to affect the image viewed by the Examiner, the focus of the imager is simultaneously affected as well.
Inventors:
FARRELL RICHARD A
HAPPEL LORENZ J JR
MCCALLY RUSSELL L
DUNCAN DONALD D
BALDWIN KEVIN C
HAPPEL LORENZ J JR
MCCALLY RUSSELL L
DUNCAN DONALD D
BALDWIN KEVIN C
Application Number:
PCT/US1999/018043
Publication Date:
September 28, 2000
Filing Date:
August 06, 1999
Export Citation:
Assignee:
UNIV JOHNS HOPKINS (US)
International Classes:
A61B3/14; (IPC1-7): A61B3/00
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