US 5,847,806 AGranted

Ophthalmological apparatus for forming a sectional image signal of measurement object

AssigneeTopcon Corporation

InventorToshifumi Mihashi

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Abstract

The present invention relates to ophthalmological apparatuses more specifically intends to provide an ophthalmological apparatus for forming a sectional image signal of a measurement object part within the subject's eye. A luminous flux separating means separates light from a first fiber into a reference optical fiber and a measuring optical fiber and a reference reflecting mirror reflects light from the reference optical fiber, and a detecting optical fiber combines light emitted from the measuring optical fiber and reflected from an eyeground of the subject's eye and led to the measuring optical fiber and light reflected by the reference reflecting mirror and led to the reference optical fiber and leads the combined light to a light receiver, and a light reflecting member detachably arranged in the optical path leads light from the light outgoing end surface of the measuring optical fiber arranged in the conjugate position to the eyeground of the subject's eye onto one optical path of the eyeground illumination system or the eyeground observation/photographing optical system.

Claims11

Dependent claims

An ophthalmological apparatus, comprising:

(a) an eyeground illumination system for projecting eyeground illumination light along a first optical path to an eyeground of a subject's eye;
(b) an eyeground observation/photographing optical system for observation and photographing along a second optical path of an eyeground illuminated by the eyeground illumination light;
(c) an optical unit located in one of the first and second optical paths for measuring light interference, the optical unit comprising
(1) a light source for emitting measurement light of short coherent length;
(2) a first optical fiber for leading light from the light source;
(3) a luminous flux separating means for separating and leading the light from the first optical fiber into a reference optical fiber and a measuring optical fiber, the measuring optical fiber having an outgoing end surface in conjugate position to the eyeground;
(4) a reference reflecting mirror for reflecting the light from the reference optical fiber;
(5) a detecting optical fiber for combining light emitted from the measuring optical fiber and reflected from the eyeground and led to the measuring optical fiber and light reflected by the reference reflecting mirror and led to the reference optical fiber;
and
(6) a light receiver for receiving the combined light from the detecting optical fiber;
(d) a light reflecting member arranged in the one optical path for selectively directing light from the light outgoing end surface of the measuring optical fiber to the eyeground.

8 more elements

Dependencies are inferred from the claim text.