Ophthalmometric apparatus for generating an image of a selection

Details Ophthalmometric apparatus for generating an image of a selection Ophthalmometric apparatus for generating an image of a selection

1995-07-31

1997-05-27

Dang, Hung X.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

351205, 351221, A61B 310

Patent

active

056336942

ABSTRACT:
The present invention relates to an ophthalmometric apparatus and is intended to provide an ophthalmometric apparatus that generates image signals representing a section of a measuring portion of a measuring eye. A first light source emits light rays having a comparatively short coherence length, a measuring optical system converges a light beam emitted by the first light source on a position substantially corresponding to the pupil of the measuring eye to illuminate a measuring portion, a beam splitter separates a reference optical path from the measuring optical path of the measuring optical system, a reference optical system including a reflecting mirror reflects a reference light beam, an interference optical system combines a reflected measuring light beam and a reflected reference light beam reflected by the reference optical system for interference, an image pickup device having a plurality of image sensing elements disposed in a substantially conjugate relation with the measuring portion receives an interference light beam provided by the interference optical system, an image signal generating unit generates image signals representing a section of the measuring eye from the output signals of the image pickup device when the reflecting mirror is shifted.

REFERENCES:
patent: 5141302 (1992-08-01), Arai et al.
patent: 5387951 (1995-02-01), Hatanaka
patent: 5459570 (1995-10-01), Swanson et al.

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