Patent · US Active

Method for ascertaining a viewing direction of an eye

US11868522B2 · kind B2 · utility

0Cited by

2References

13Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Reinhold Fiess · Durbach, DE
Andreas Petersen · Erbach, DE
Thomas Alexander Schlebusch · Renningen, DE

Key dates

Filing date	Aug 12, 2019
Grant date	Jan 9, 2024
Priority date	—
Expiry date	Feb 10, 2041

Classification

Technology area (CPC G)Physics
CPC primaryG02B2027/0178
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A method for ascertaining a viewing direction of an eye. A laser beam emitted by a laser source is passed over at least two scanning points on the eye, using a reflection element and a deflecting element. A self-mixing effect of the scanning laser beam reflected by the eye into the laser source is used, in order to determine, for the at least two scanning points, the optical path length from the laser source to the at least two scanning points on the surface of the eye and/or a reflectivity of the eye at the at least two scanning points.

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