Milan Momcilo Popovich,Jonathan David Waldern,Alastair John Grant
申请号：
US16593546
公开号：
US20200041787A1
申请日:
2019.10.04
申请国别(地区):
US
年份:
2020
代理人:
摘要：
An eye tracker comprises a light source； a detector； and first and second waveguides. The first waveguide comprises an input coupler for coupling source light into a waveguide path and a first grating for coupling light out of the waveguide path onto an eye. The second waveguide comprises a second grating for coupling light reflected from the eye into a waveguide path and an output coupler for coupling light out of the waveguide path onto the detector. The second grating is optically configured for imaging the eye onto the detector.
