US 12,470,686 B2
Calibration of stereoscopic display using waveguide combiner
Dmitriy Churin, Redmond, WA (US); Parry Byron Johnson, Redmond, WA (US); Dmitry Reshidko, Sammamish, WA (US); and Congshan Wan, Suzhou (CN)
Assigned to Microsoft Technology Licensing, LLC, Redmond, WA (US)
Filed by Microsoft Technology Licensing, LLC, Redmond, WA (US)
Filed on Dec. 13, 2023, as Appl. No. 18/539,216.
Application 18/539,216 is a continuation of application No. 17/648,794, filed on Jan. 24, 2022, granted, now 11,876,952.
Prior Publication US 2024/0114123 A1, Apr. 4, 2024
Int. Cl. H04N 13/327 (2018.01); G02B 27/01 (2006.01); H04N 13/341 (2018.01); H04N 13/344 (2018.01); H04N 13/363 (2018.01); H04N 13/398 (2018.01)
CPC H04N 13/327 (2018.05) [G02B 27/0172 (2013.01); H04N 13/341 (2018.05); H04N 13/344 (2018.05); H04N 13/363 (2018.05); H04N 13/398 (2018.05); G02B 2027/0134 (2013.01); G02B 2027/0178 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A head mounted display (HMD) device comprising:
a first image projection waveguide comprising a first optical path configured to transmit a first image for viewing;
a second image projection waveguide comprising a second optical path configured to transmit a second image for viewing;
an optical calibration system comprising
a third optical path configured to transmit a first calibration image, a portion of the third optical path being located in the first image projection waveguide and separate from the first optical path,
a fourth optical path configured to transmit a second calibration image, a portion of the fourth optical path being located in the second image projection waveguide and separate from the second optical path,
a waveguide combiner in which the third optical path and the fourth optical path combine into a shared optical path, and
a boresight sensor optically coupled to a common output coupler of the waveguide combiner, the boresight sensor configured to detect light traveling along the third optical path or the fourth optical path; and
a controller configured to adjust one or more of the first image or the second image based at least in part on an output of the boresight sensor.