FUNDUS CAMERA WITH CAN PHOTOGRAPH SMALL PUPIL

摘要

PURPOSE:To photograph the pupil of the eye to be examined with a sufficient resolving power without increasing the output of a light source section by reducing the diameter of a light shielding point and reducing the diameter of an illumination field even if the pupil diameter of the eye to be examined is small. CONSTITUTION:A spring up mirror 15 is inserted onto an optical path and the light source 1 for observation emits light when the eye E to be examined is disposed. The luminous flux thereof is transmitted through a light source 3 for photographing while its image is formed on this light source by a condenser lens 2. After this luminous flux forms the image on a ring slit 6 through a condenser lens 4 and a mirror 5, the luminous flux is reflected while the image is formed in the hole part of a bored mirror 11 through a large light shielding point 7a or small light shielding point 7b, a relay lens 8, an illumination field diaphragm 9 and a relay lens 10. The image is again formed near the pupil 1 of the eye E to be examined by an objective lens 12 and the fundus oculi F is irradiated therewith. The reflected light from the fundus oculi F is emitted from the pupil I, is passed again through the objective lens 12 and the hole part of the bored mirror 11 and forms the image again in the position of a field lens 17 through a focusing lens 13, a photographic lens 14 and the spring up mirror 15. This image is observed by the eye e to be examined through a mirror 18 and an eyepiece lens 19.