Patent ID: 11876952
Assignee: MICROSOFT TECHNOLOGY LICENSING, LLC
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 11:
12. A head mounted display (HMD) device comprising:
a first image projector configured to project a first image of a stereoscopic image pair;
a second image projector configured to project a second image of the stereoscopic image pair;
an optical calibration system comprising
a first calibration image source configured to output a first calibration image along a first optical path indicative of an alignment of the first image projector,
a second calibration image source configured to output a second calibration image along a second optical path indicative of an alignment of the second image projector,
a waveguide combiner in which the first optical path and the second optical path combine into a shared optical path, the waveguide combiner being positioned in a nose bridge of the HMD device, and
a boresight sensor optically coupled to an output coupler of the waveguide combiner, the boresight sensor configured to detect the first calibration image and the second calibration image; and

a controller configured to adjust one or more of the first image of the stereoscopic image pair and the second image of the stereoscopic image pair based at least in part on an output of the boresight sensor.