Topographer and method for mapping corneal surface

Details Topographer and method for mapping corneal surface Topographer and method for mapping corneal surface

2005-05-03

2005-05-03

Manuel, George (Department: 3762)

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

Reexamination Certificate

active

06886939

ABSTRACT:
A topographer for mapping the central portion as well as the peripheral portion of the corneal surface is disclosed. The topographer includes a chart image generating part for producing a chart image to fixate the gaze of an eye under test; a measuring light source for projecting concentric ring-shaped measuring lights to the cornea of the eye; a light detector for detecting the image of the measuring light reflected from the cornea; and a vertex measuring optical system. The vertex measuring optical system comprises a vertex measuring light source for radiating a vertex measuring light; a vertex beam splitter for separating the vertex measuring light into two beams; a vertex measuring light projector for projecting one of the two beams to the corneal vertex of the eye, and capable of moving along the surface of the corneal vertex; a collimator for projecting the other beam to a scanning mirror; and a vertex measuring light detector for detecting a light signal produced by superimposing and interfering the two beams reflected from the scanning mirror and the corneal vertex.

REFERENCES:
patent: 5521657 (1996-05-01), Klopotek

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