LiDAR device
AssigneeSOS LAB Co., Ltd.
InventorsJun Hwan Jang, Hee Sun Yoon
Life of this patent
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Abstract
A lidar device comprises: a laser emitting unit for including a plurality of VCSEL elements emitting a laser beam; a metasurface for including a plurality of beam steering cells arranged in a form of two-dimensional array by a row direction and a column direction, wherein the plurality of beam steering cells guide the laser beam by using nanopillars; wherein the nanopillars included in the plurality of beam steering cells form a subwavelength pattern, wherein the increase of an attribute related to at least one of the width, height, and number per unit length of the nanopillars is repetitive along the direction from the center of the metasurface to the position of the row corresponding to the plurality of beam steering cells.
Claims8
A lidar device comprising:
- a laser emitting module including a plurality of Vertical Cavity Surface Emitting Laser (VCSEL) elements emitting a laser beam and arranged along in a form of an array;
- a metasurface including a plurality of nanopillars arranged on an emission surface side of the laser emitting module, and configured to steer the emitted laser beam, wherein the metasurface includes a plurality of beam steering cells arranged in a form of an array and configured to steer the emitted laser beam;
- a polygonal mirror rotating about a rotational axis, reflecting the emitted laser beam toward an object and receiving a reflected laser beam by the object;
- and
- a sensor unit receiving, via the polygonal mirror, the reflected laser beam reflected
- wherein the plurality of beam steering cells include a first beam steering cell and a second beam steering cell,
- wherein the second beam steering cell is located closer to a center of the metasurface than the first beam steering cell,
- wherein each of the plurality of beam steering cells includes at least some of the plurality of nanopillars,
- wherein the nanopillars included in the first beam steering cell form a first subwavelength pattern and the nanopillars included in the second beam steering cell form a second subwavelength pattern,
- wherein a first change rate of an attribute in the first beam steering cell is different from a second change rate of the attribute in the second beam steering cell, and
- wherein the attribute is related to at least one of a width, a height, and a number per unit length.
Dependencies are inferred from the claim text.