Method and apparatus for determining optical characteristics of

Details Method and apparatus for determining optical characteristics of Method and apparatus for determining optical characteristics of

1997-09-24

1999-07-06

Manuel, George

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

A61B 310

Patent

active

059203730

ABSTRACT:
A system for determining the birefringent topography of a birefringent sample (e.g. cornea of an eye) includes a scanning tomopgraphy unit for establishing a plane of focus and an ellipsometer for generating a laser beam that is useable to obtain a birefringent measurement of the sample. The system also includes a topography unit for determining the angle the laser beam is incident on the sample, and a computer for correcting the birefringent measurement to account for this angle of incidence. A Z-tracker unit is used to maintain a proper relationship between system components during its operation. In a refinement of the system, where the sample is the cornea of an eye, the affects of patient heart beat and respiration can be preprogrammed into the computer for use in correcting the birefringent measurement.

REFERENCES:
patent: 3769963 (1973-11-01), Goldman et al.
patent: 4669466 (1987-06-01), L'Esperance
patent: 4732148 (1988-03-01), L'Esperance, Jr.
patent: 4770172 (1988-09-01), L'Esperance, Jr.
patent: 4773414 (1988-09-01), L'Esperance, Jr.
patent: 4907586 (1990-03-01), Bille et al.
patent: 4988348 (1991-01-01), Bille
patent: 5062702 (1991-11-01), Bille
patent: 5459570 (1995-10-01), Swanson et al.
patent: 5787890 (1998-08-01), Reiter et al.
patent: 5822035 (1998-10-01), Bille

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