Optical arrangement of smart glasses for scanning surface

1. An optical arrangement for smart glasses, comprising:

a first laser device configured to emit a projection light beam;

a second laser device configured to emit a measuring light beam;

a beam splitter configured and arranged to split the measuring light beam into at least two separate measuring light beams;

a first scanner,

a second scanner; and

a beam combiner configured to combine the projection light beam and the measuring light beam into a common light beam,

wherein the first scanner is configured to redirect the projection light beam emitted by the first laser device in a first axis

wherein the second scanner is configured to redirect the common light beam emitted by the beam combiner in a second axis, and

wherein a plurality of measuring light beams emitted from the second laser device and the beam splitter are aligned to produce an interlaced line pattern of scan lines on a surface to be scanned.

2. The optical arrangement according to claim 1 , wherein the first scanner is configured to scan the projection light beam at a first scanning frequency, wherein the second scanner is configured to scan the common light beam at a second scanning frequency, and wherein the second scanning frequency is smaller than the first scanning frequency.

3. The optical arrangement according to claim 1 , wherein the first laser device comprises a projection unit configured to project an image onto a retina of an eye of a user using the projection light beam.

4. The optical arrangement according to claim 1 , wherein the second laser device comprises a viewing detection unit configured to determine an optical path length of the measuring light beam based on laser feedback interferometry of the measuring light beam with a backscattered portion of the measuring light beam from an eye, and to determine a viewing direction of the eye based on the optical path length.

5. The optical arrangement according to claim 1 , wherein the first scanner and/or the second scanner comprises a micro mirror actuator.

6. The optical arrangement according to claim 1 , wherein the beam combiner comprises a polarization beam splitter, and wherein the projection light beam and the measuring light beam are polarized perpendicular to each other.

7. The optical arrangement according to claim 1 , wherein the beam combiner comprises a holographic optical element which is designed to deflect the projection light beam and the measuring light beam at different angles.

8. The optical arrangement according to claim 1 , wherein the second laser device is configured to emit a plurality of separate measuring light beams.

9. The optical arrangement according to claim 8 , further comprising a holographic optical element having a first holographic segment and a second holographic segment, wherein the two holographic segments are formed such that a first scanning direction of a measuring light beam deflected at the first holographic segment is inclined at an angle in relation to a second scanning direction of a measuring light beam deflected at the second holographic segment.

10. The optical arrangement according to claim 1 , wherein the beam splitter:

is integrated into the second laser device;

is arranged on the second laser device;

is integrated into the beam combiner; or

is integrated into a deflecting element provided for deflecting the measuring light beam.

11. The optical arrangement according to claim 1 , wherein the second laser device comprises at least one surface emitter with integrated photodiode.

12. A pair of smart glasses comprising the optical arrangement according to claim 1 , wherein the optical arrangement is arranged on an eyeglass temple.

13. The pair of smart glasses according to claim 12 , further comprising an eyeglass lens with a holographic optical deflection element, wherein the holographic optical deflection element is configured to deflect all light beams emitted by the optical arrangement towards an eye of a user of the pair of smart glasses.