Position detecting apparatus for an ophthalmologic apparatus

Details Position detecting apparatus for an ophthalmologic apparatus Position detecting apparatus for an ophthalmologic apparatus

1995-06-21

1997-10-21

Mai, Huy

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

351211, A61B 314, A61B 310

Patent

active

056801963

ABSTRACT:
A position detecting apparatus for an ophthalmologic apparatus has an image pickup element, a light source, a first projection system for projecting a light beam from the light source onto the cornea of an eye to be examined, a second projection system for projecting one corneal reflection image of the light source onto a plurality of positions on the image pickup element, and a calculator for calculating the central positions of and the distance between the corneal reflection images projected onto the plurality of positions on the image pickup element. The positional deviation of the ophthalmologic apparatus relative to the eye to be examined from an aligned state is quantitatively detected by the calculation by the calculator.

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