System to measure the topography of both corneal surfaces and corneal thickness
AssigneeUniversidade Do Minho
InventorsJose Manuel Martins Borges De Almeida, Sandra Maria de Braga Franco
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Abstract
The invention refers to a system to measure the topography of both surfaces of the cornea (6) and it is thickness, based on a collimated light beam, namely a laser beam, expanded in a fan shape (5) by a cylindrical lens (4) provided with rotational movement. The fan expanded beam (5) produces an image of a corneal section by light diffusion; this image is captured by one or more video cameras (2, 3). The rotation of the cylindrical lens (4) causes the simultaneous rotation of the corneal section image, producing a complete scanning of the same cornea (6).
Claims5
System for the measurement of the topography of both corneal surfaces and the thickness of the cornea (6), characterised by having an illumination system comprising a laser (1) or another collimated beam of light and a cylindrical lens (4) to produce an illuminating beam expanded like in the form of a fan (5), the cylindrical lens (4) with rotation in order to rotate the plane of expanded beam (5) and, having at least one observation camera in a different direction than that of the light beam and a system of image acquisition and processing.
Dependencies are inferred from the claim text.