Patent ID: 11887208
Assignee: MAGIC LEAP, INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 9:
10. A method for determining intrinsic parameters of a plurality of cameras, the method comprising:
providing a plurality of cameras and a plurality of collimator assemblies, wherein each collimator assembly includes a two-sided diffractive optical element, wherein a grating pattern is formed on each surface of the two-sided diffractive optical element;
placing the plurality of cameras in front of the plurality of collimator assemblies, wherein each camera is placed in front of one of the plurality of collimator assemblies;
for each camera among the plurality of cameras:
receiving, using a computing device, an image from the camera, wherein the grating pattern formed on each surface of the two-sided diffractive optical element is selected to reduce a brightness of a central intensity peak on the image to a predetermined amount;
identifying, using the computing device, data pairs, each data pair including pixel coordinates of an intensity peak on the image and virtual light source formed by the two-sided diffractive optical element that corresponds to the intensity peak; and
determining, using the computing device, intrinsic parameters of the camera using the identified data pairs for the image.