Patent · US Active

Device and method for distance determination and/or centering using corneal reflections

US10758124B2 · kind B2 · utility

0Cited by

1References

17Claims

0Family size

Assignee

RODENSTOCK GMBH · DE

Inventors

Peter Seitz · Munich, DE
Markus Tiemann · Munich, DE
Gregor Esser · Munich, DE
Anne Seidemann · Munich, DE
Werner Mueller · Rain, DE

Key dates

Filing date	Jan 26, 2016
Grant date	Sep 1, 2020
Priority date	—
Expiry date	Jan 6, 2037

Classification

Technology area (CPC G)Physics
CPC primaryG02C13/005
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

A device for determining the distance of an eye of a user from the image capturing device is disclosed. The device includes a lighting device that is arranged at a specified position relative to the image capturing device and is designed to generate at least one specular light reflection, which has a linear portion, on the cornea of the eye of the user. The device also includes an image capturing device designed to capture at least one image of the specular light reflection in the region of the cornea of the at least one eye of the user. A distance determining device is designed to ascertain data relating to the distance between two specified points of the light reflection and the curvature of the at least one linear portion of the light reflection in the captured image and the distance of the eye from the image capturing device.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.