Fundus camera for infrared fluorsein angiography

Details Fundus camera for infrared fluorsein angiography Fundus camera for infrared fluorsein angiography

1995-01-13

1996-09-17

Sikes, William L.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

351213, A61B 314

Patent

active

055573495

ABSTRACT:
The present invention relates to a fundus camera for photographing vascular condition of the retina in medical examination for checking health, and it comprises a retina illuminating system for projecting infrared illuminating light beam to the retina to be examined, a first barrier filter having a first transmission wavelength range and a second barrier filter having a second transmission wavelength range shifted toward longer wavelength range, said two barrier filters being interchangeable with each other, and a photographing system for angiography of the retina to be examined through either the first or the second barrier filters, whereby a proper fluorescent vascular image is photographed even when fluorescent light wavelength from the retina is changed with the lapse of time.

REFERENCES:
patent: 4854692 (1989-08-01), Kobayashi
patent: 5118179 (1992-06-01), Sano et al.
patent: 5181055 (1993-01-01), Sano et al.
patent: 5214454 (1993-05-01), Sano
patent: 5287129 (1994-02-01), Sano et al.
patent: 5291231 (1994-03-01), Hideshima et al.

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