Fundus camera for infrared fluorsein angiography
US5557349A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 13, 1995 |
| Grant date | Sep 17, 1996 |
| Priority date | — |
| Expiry date | Jan 13, 2015 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B3/145
- WIPO fieldMedical technology
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.