Milan Momcilo POPOVICH,Jonathan David WALDERN,Alastair John GRANT
申请号:
US15796169
公开号:
US20180113303A1
申请日:
2017.10.27
申请国别(地区):
US
年份:
2018
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.