Method for determining an eye distance in a pair of data glasses, and data glasses

A method at least for determining an eye distance between a user's eye and an optical element of an optical system of a pair of data glasses including a virtual retinal display, the method comprising the following steps:

• generating a scanned laser beam;
• optically reproducing the scanned laser beam;
• illuminating the user's eye using the optically reproduced scanned laser beam;
• detecting a reflection signal reflected by the user's eye;
• ascertaining pupil positions within the detected reflection signal;
• determining relative distances of the pupil positions ascertained from the reflection signal:
• to one another and/or to a common origin point and/or to one or more reference points;
• and
• calculating an instantaneous eye distance from the determined relative distances.

An optical system of a pair of data glasses, comprising:

• a laser projector configured to generate a scanned laser beam;
• an optical reproduction element including a segmentation lens, configured to reproduce the scanned laser beam;
• and
• at least one detector configured to detect a reflection signal of the scanned and reproduced laser beam;
• wherein the optical system is configured to determine an eye distance between a user's eye and an optical element of the optical system, the optical system of the pair of data glasses including a virtual retinal display, the optical system configured to:
• generate the scanned laser beam using the laser projector;
• optically reproduce the scanned laser beam using the optical reproducting element;
• illuminate the user's eye using the optically reproduced scanned laser beam;
• detect, using the detector, a reflection signal reflected by the user's eye;
• ascertain pupil positions within the detected reflection signal;
• determine relative distances of the pupil positions ascertained from the reflection signal:
• to one another and/or to a common origin point and/or to one or more reference points;
• and
• calculate an instantaneous eye distance from the determined relative distances.

Data glasses, comprising:

• an optical system, including:
• a laser projector configured to generate a scanned laser beam;
• an optical reproduction element including a segmentation lens, configured to reproduce the scanned laser beam;
• and
• at least one detector configured to detect a reflection signal of the scanned and reproduced laser beam;
• wherein the optical system is configured to:
• generate the scanned laser beam using the laser projector,
• optically reproduce the scanned laser beam using the optical reproducting element,
• illuminate a user's eye using the optically reproduced scanned laser beam, and
• detect, using the detector, a reflection signal reflected by the user's eye;
• an evaluation unit for evaluating the reflection signal detected by the detector, the evaluation unit configured to:
• ascertain pupil positions within the detected reflection signal,
• determining relative distances of the pupil positions ascertained from the reflection signal:
• to one another and/or to a common origin point and/or to one or more reference points, and
• calculate an instantaneous eye distance from the determined relative distances;
• and
• an eye distance compensation unit configured to dynamically control components of the optical system of the data glasses to compensate for eye distance variations.