Ophthalmologic photography apparatus

Patent metadata

Field	Value
Publication number	US-9072467-B2
Application number	US-200913138215-A
Country	US
Kind code	B2
Filing date	Aug 26, 2009
Priority date	Jan 30, 2009
Publication date	Jul 7, 2015
Grant date	Jul 7, 2015

Abstract

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.

First claim

The invention claimed is:

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…

Assignees

• Suzuki Takayoshi
• Kowa Co

Inventors

• Suzuki Takayoshi

Classifications

• A61B3/14

  Human Necessities · mapped topic

• A61B3/12 Primary

  Human Necessities · mapped topic

• G06T2207/30041

  Physics · mapped topic

• A61B3/132

  Human Necessities · mapped topic

• G06T2207/10012

  Physics · mapped topic