US 11,838,675 B2
Depth imaging camera with polarization-coded aperture
Emanuel Mordechai, Mishmarot (IL)
Assigned to GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed by GM Global Technology Operations LLC, Detroit, MI (US)
Filed on Feb. 23, 2021, as Appl. No. 17/182,695.
Prior Publication US 2022/0272234 A1, Aug. 25, 2022
Int. Cl. H04N 5/222 (2006.01); G01S 17/931 (2020.01); G01S 17/89 (2020.01); G02B 5/30 (2006.01); H04N 23/80 (2023.01)
CPC H04N 5/2226 (2013.01) [G01S 17/89 (2013.01); G01S 17/931 (2020.01); G02B 5/3025 (2013.01); H04N 23/80 (2023.01)] 20 Claims
OG exemplary drawing
 
1. A depth imaging system in a vehicle comprising:
a lens including a polarization-coded aperture, the polarization-coded aperture comprising:
a perpendicular polarization portion configured to pass incident light from an object as perpendicularly polarized light;
a parallel polarization portion configured to pass the incident light from the object as parallel polarized light;
an image sensor configured to provide a perpendicularly polarized image of the object at a first location based on the perpendicularly polarized light and a parallel polarized image of the object at a second location based on the parallel polarized light; and
a controller configured to determine a difference between the first location of the perpendicularly polarized image and the second location of the parallel polarized image to determine a range to the object.