Phototopometer

Details Phototopometer Phototopometer

1979-02-06

1982-01-26

Corbin, John K.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Folding

351 13, A61B 314, A61B 310

Patent

active

043125743

ABSTRACT:
A phototopometer for determining the curvature of the cornea of an eye including pairs of measuring targets arranged in a measuring target carrier for disposition at a predetermined distance from the cornea of the eye to be measured and a photographing system for photographing the measuring targets reflected on the cornea to enable the radius of curvature of the cornea in the zone of the measuring target reflection to be determined from the reproduced image of the measuring targets in accordance with geometrical characteristics the photographing system has an optical axis and the spacing of the measuring targets of each measuring target pair is dimensioned in dependence on the distance thereof to the optical axis of the photographing system and to the cornea, whereby in accordance with the reproduction scale of the photographing system, the spacings of all reproduced measuring target pairs are in the same proportional relationship to the respectively associated radius of the cornea.

REFERENCES:
patent: 1721208 (1929-07-01), Currier et al.
patent: 1918540 (1933-07-01), Hartinger
patent: 4159867 (1979-07-01), Achatz et al.

Affiliated with

Also associated with

Rating

Phototopometer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Phototopometer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phototopometer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1664657