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 retina display. The method includes: generating a scanned laser beam; optically reproducing the scanned laser beam; illuminating a user's eye by means of 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.
1. 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.
2. The method according to claim 1 , wherein, using the optical reproduction of the scanned laser beam, at least two image copies shifted relative to one another in a pupil plane of the user's eye, are generated.
3. The method according to claim 1 , wherein the instantaneous eye distance between the user's eye and a last optical element of the optical system, traversed by the scanned laser beam, of the data glasses is determined.
4. The method according to claim 1 , wherein the instantaneous eye distance between the user's eye and an eyeglass lens of the data glasses is determined.
5. The method according to claim 1 , wherein the scanned laser beam is reproduced by a segmentation lens.
6. The method according to claim 1 , wherein the pupil positions are ascertained from the reflection signal using a bright-pupil effect.
7. The method according to claim 1 , wherein the calculation of the instantaneous eye distance takes place recurrently at least during operation of the data glasses.
8. The method according to claim 1 , wherein the calculation of the instantaneous eye distance takes place periodically at least during operation of the data glasses.
9. The method according to claim 1 , wherein an output of the virtual retinal display including at least one focus of at least one visible portion of the scanned laser beam, is adjusted and/or optimized based on the calculated instantaneous eye distance.
10. The method according to claim 1 , wherein detection of reflected images takes place independently at least of a camera configured to be separate from a laser projector of the virtual retinal display.
11. 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.
12. 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.