Device and method for distance determination and/or centering using corneal reflections
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United States of America Patent
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Sep 1, 2020
Grant Date -
Feb 15, 2018
app pub date -
Jan 26, 2016
filing date -
Feb 13, 2015
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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.
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