FUNDUS CAMERA WITH CAN PHOTOGRAPH SMALL PUPIL

Japanese Patent JP3243272

B2

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.

Shinya Tanaka
Satoru Okishi

JP3858092A

January 07, 2002

January 29, 1992

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Canon Inc

A61B3/14; G02B21/36; (IPC1-7): A61B3/14; G02B21/36

JP54141095A
JP54147686A
JP5697433A
JP5949737A
JP6055927A
JP3128038A
JP5586439A
JP5789847A
JP56143138A
JP57148929A
JP63212324A
JP61240940A
JP6297528A
JP52108123A

Yukihiko Hibiya

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