Ophthalmic apparatus having light polarizing means

Details Ophthalmic apparatus having light polarizing means Ophthalmic apparatus having light polarizing means

1996-12-05

1998-02-17

Dang, Hung X.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

351205, A61B 310

Patent

active

057196591

ABSTRACT:
An ophthalmic apparatus for diagnosing the condition of an eye based on an examination of images of interference fringes formed by a lacrimal layer on the anterior portion of the eye. The apparatus has an illumination system that projects a beam of light from a light source onto the anterior portion of the eye, and an imaging system, such as a CCD camera, that produces images of interference fringes formed by a lacrimal layer on the anterior portion of the eye. The illumination and imaging systems each have linear polarizers having mutually parallel linear polarization axes.

REFERENCES:
patent: 5537162 (1996-07-01), Hellmuth et al.

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