Patent ID: 11953696
Assignee: TRILITE TECHNOLOGIES GMBH
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 14:
15. The display device according to claim 13,
comprising a further light source configured to emit an infrared light beam via said mirror assembly towards the eye;
wherein the light sensor is configured to record, as said return light, a reflection of the infrared light beam;
wherein the further light source is configured to emit the infrared light beam as a collimated infrared light beam;
wherein the mirror assembly is configured to deflect the collimated infrared light beam as a deflected collimated infrared light beam; and
wherein the optical guide is a waveguide which has
an in-coupling section configured to couple the deflected collimated infrared light beam into the waveguide,
a guiding section configured to guide the deflected collimated infrared light beam through the waveguide, and
an out-coupling section configured to couple the deflected collimated infrared light beam out from the waveguide as a collimated expanded infrared light beam whose cross section is larger than the cross section of the deflected collimated infrared light beam.