Patent ID: 11918439
Assignee: MEDIT CORP.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC A  G  H | IPC A  G  H

Claim 19:
20. An apparatus for intra-oral imaging using a projected texture pattern, comprising:
a projector;
a polarizing beam-splitter located between the projector and an object to be imaged;
a quarter-wave retarder located between the beam-splitter and the object to be imaged; and
an image sensor,
wherein the projector is configured to determine a size of blocks for a random texture pattern based on translucency of the object to be imaged and project the random texture pattern of light through the beam-splitter and quarter-wave retarder to the object to be imaged, and the image sensor is configured to receive the projected texture pattern from the object to be imaged through the beam-splitter,
wherein the texture pattern is two-dimensional and has blocks comprised of an integer number of pixels, each block has a dark or a bright setting, and each adjacent group of blocks in a row of the texture pattern has a unique configuration of dark and bright blocks with respect to other adjacent groups of blocks in the row.