Kabushiki Kaisha Topcon

Hiroshi Minegishi

Eiichi Sano

A fundus camera, for taking photographs by fluorescence, has an illuminating optical system to illuminate a fundus. The illuminating optical system is provided with a diaphragm that can be adjusted to modify the illumination state of the fundus according to the light reflected from the fundus when taking photographs by fluorescence. As a result, a good photographic image of the fundus can always be obtained.

Fundus camera

This invention concerns a fundus camera which can take photographs other than by fluorescence or by fluorescence. An optical device is withdrawn from the optical path of a photographic system at the same time as a barrier filter for taking photographs by fluorescence is inserted and is inserted in the optical path of the photographic system for observation purposes at the same time as the barrier filter is removed. The optical device has the same optical path length as the barrier filter, and thus a focused fundus image attained during observation is not upset when fluorescent photographs are taken.

This invention discloses a fundus camera which can take fluorescent photographs by infra-red light and other types of photographs. It comprises detecting means for detecting whether or not the photograph being taken is a fluorescent photograph by infra-red light, means for automatically setting the amount of light emitted by a photographic source when the photograph being taken is not a fluorescent photograph by infra-red light, and changing over to manual setting of the amount of light emitted by said photographic source when the photograph being taken is a fluorescent photograph by infra-red light, according to information provided by said detecting means.

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Tokyo, Japan

Hiroshi Minegishi