Apparatus for projecting linear laser beams

A light detection and ranging (LiDAR) device that includes a laser pulse emitting unit, wherein the laser pulse emitting unit further includes:

• a laser source array;
• a prism array pair;
• a first cylinder lens;
• a second cylinder lens;
• and
• a microelectromechanical system (MEMS) mirror;
• wherein the prism array pair is positioned between the laser source array and the first cylinder lens to reduce a pitch between laser beams from the laser source array to a predetermined value;
• wherein the first cylinder lens is to focus the laser beams from the prism array pair onto the MEMS mirror, which redirects the laser beams as a linear laser beam towards a predetermined direction;
• and
• wherein the second cylinder lens is positioned at a predetermined distance from the MEMS mirror in the predetermined direction to adjust a divergent angle of the redirected linear laser beam from the MEMS mirror.

A method of projecting a linear laser beam, comprising:

• reducing, using a prism array pair, a pitch of laser beams generated by a laser source array to a predetermined value, wherein the prism array pair is positioned between the laser source and a first cylinder lens;
• focusing, by the first cylinder lens, the laser beams from the prism array pair onto a microelectromechanical system (MEMS) mirror;
• redirecting, by the MEMS mirror, the laser beams towards a predetermined direction as a linear laser beam towards a predetermined direction, and
• adjusting, by a second cylinder lens positioned at a predetermined distance from the MEMS mirror in the predetermined direction, a divergent angle of the redirected linear laser beam from the MEMS mirror.