beam director, printhead for a three-dimensional printer, and method for directing a beam toward a work surface with a beam director

摘要

The present invention relates to a beam director, typically comprises a first rotatable mirror about a longitudinal axis, with a reflective surface at an acute angle to the longitudinal axis, which allows a laser beam to be transmitted to the beam. along the longitudinal axis and redirected over a work surface, which is typically perpendicular to the longitudinal axis. A second stationary arcuate mirror segment can be used to reflect the beam along an arcuate path over the work surface. state-of-the-art beam steering systems can be enhanced or simplified by: 1) eliminating the second mirror with a 90 ° reflection to the work surface; 2) fixation of tangent factor when drawing / rendering / sintering / cutting using f-theta-like lens; and 3) fixation of the tangent factor by controlling the amount and / or duration of energy.