US 12,462,414 B2
Depth sensing for extended reality (XR) apparatus
Mikko Ollila, Tampere (FI); and Mikko Strandborg, Hangonkylä (FI)
Assigned to Varjo Technologies Oy, Helsinki (FI)
Filed by Varjo Technologies Oy, Helsinki (FI)
Filed on Dec. 15, 2023, as Appl. No. 18/540,951.
Prior Publication US 2025/0200776 A1, Jun. 19, 2025
Int. Cl. G06T 7/593 (2017.01); G06T 7/521 (2017.01); H04N 13/239 (2018.01); H04N 13/254 (2018.01); H04N 13/271 (2018.01); H04N 25/47 (2023.01); H04N 13/00 (2018.01)
CPC G06T 7/593 (2017.01) [G06T 7/521 (2017.01); H04N 13/239 (2018.05); H04N 13/254 (2018.05); H04N 13/271 (2018.05); H04N 25/47 (2023.01); G06T 2207/10012 (2013.01); G06T 2207/10028 (2013.01); H04N 2013/0081 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An apparatus for depth sensing, the apparatus comprising:
a scanning light source configured to sequentially illuminate an environment utilizing a scan pattern;
a birefringent layer adapted to receive and split reflected scan pattern from the environment into an ordinary ray (O-ray) image and an extraordinary ray (E-ray) image;
an imaging sensor positioned along an optical path of the birefringent layer to capture the O-ray image and the E-ray image as transmitted therefrom; and
a processor configured to compute differences between positions of the O-ray image and the E-ray image and derive a depth map of the environment based on the computed differences,
wherein the scanning light source is configured to pre-curve the scan pattern to match a curvature of a lens of the imaging sensor, such that the O-ray image and the E-ray image are comparatively linear, minimizing lens distortion effects.