Luminar Technologies, Inc.
Manufacturing a balanced polygon mirror

Abstract:

A technique for manufacturing highly balanced rotatable polygon mirrors for use in scanners includes forming a block having a first wall, a second wall, and reflective surfaces extending between the first and second walls, the surfaces being angularly offset from one another along a periphery of the block. The technique includes applying a coarse balancing procedure to the block, making the surfaces reflective, mating the block to a motor, and applying a precise balancing procedure to the block. The technique also includes imparting rotation to the block and removing material from the block via the first wall using high-energy laser pulses.