Ophthalmologic photography apparatus

摘要

A light beam reflected from an ocular fundus is split into a pair of right and left light beams by a two-aperture stop disposed in a position conjugate with an anterior ocular segment of an eye to be examined. The pair of right and left ocular fundus images having a parallax is formed as intermediate images from the split light beams at the position of a photographic mask. The optical path of the pair of ocular fundus images formed as intermediate images is split by a pair of optical path splitting lenses disposed in a position substantially conjugate with the two-aperture stop. One ocular fundus image is re-formed on half of an imaging plane of an imaging element, and the other ocular fundus image is reformed separately on the other half of the imaging plane. With such a structure, two ocular fundus images for three dimensional viewing can be efficiently obtained without using a prism for splitting the optical path.

主权项

1. An ophthalmologic photography apparatus wherein an image of an ocular fundus of an eye to be examined is photographed by electronic imaging means, comprising:
a two-aperture stop disposed in a position conjugate with an anterior ocular segment of the eye to be examined for splitting a light beam reflected from the ocular fundus of the eye to be examined into a pair of right and left light beams having a parallax; a first image-forming optical system that forms from the split light beams a pair of right and left optical fundus images as intermediate images; and a second image-forming optical system that separates the pair of ocular fundus images formed as intermediate images into the right and left and re-forms them on an imaging plane of the electronic imaging means, the second image-forming optical system comprising a pair of optical path splitting lenses disposed in a position substantially conjugate with the two-aperture stop to split an optical path from the pair of ocular fundus images formed as intermediate images and separately re-forms the pair of ocular fundus images on the imaging plane of the electronic imaging means.