Optical device with two reflecting surfaces

Details Optical device with two reflecting surfaces Optical device with two reflecting surfaces

1981-10-26

1984-03-27

Corbin, John K.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

A61B 310

Patent

active

044390262

ABSTRACT:
A contact glass with two reflecting surfaces for observing the chamber angle of a human eye in proximity of the iris, with a reflecting surface arranged laterally of the eye to be examined and a central reflecting surface to be located in the area of the common optical axis of the eye and of the axis of the contact glass; the path of observation rays is guided from the eye of the observer to the central reflecting surface and from the latter by way of the lateral reflecting surface into the interior of the eye whereby the lateral reflecting surface is so arranged to the common axis that its plane intersects the eye to be examined outside of the corneal area thereof and extends toward the eye to be examined up to a point to the rear of the center tangent of the eye abutment surface of the contact glass.

REFERENCES:
patent: 3820879 (1974-06-01), Frisen

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