Optical designs and detector designs for improved resolution of lidar systems

摘要

The optical system includes a laser source having an emission area having a first width in a first direction and a first height in a second direction orthogonal to the first direction, the first width being greater than the first height. The optical system further includes a cylindrical lens having a negative power and positioned in front of the laser source. The cylindrical lens is oriented such that the frequency axis of the cylindrical lens is along the first direction. The cylindrical lens is configured to convert the emitting area of the laser beam emitted by the laser source into a virtual emitting area having a virtual width and a virtual height, wherein the virtual width is less than the first width. The optical system further comprises a rotationally symmetrical lens positioned downstream from the cylindrical lens and configured to collimate and direct the laser beam towards the far field.