An apparatus for delivering laser energy from a source of laser energy to a target surface on a work piece, comprising: beam delivery optics having adjustable components arranged to receive the laser energy from an output of the source of laser energy and direct the laser energy along an optical path toward the target surface, the adjustable components comprising an adjustable transmitting mirror and a robot mounted optical assembly incorporating an adjustable receiving mirror, and the optical path including a variable segment that separates the transmitting mirror and the receiving mirror and is straight, the variable segment having a variable length and variable direction through air between the transmitting mirror and the receiving mirror the receiving mirror having a position adjustable in three dimensions relative to the transmitting mirror by adjusting a position of the robot mounted optical assembly; and a controller (112, 113, 114), coupled to the adjustable components of the beam delivery optics, to adjust the position of the robot mounted optical assembly to change the variable length of the variable segment, and the variable direction of the variable segment is determined by controlling an angle setting of the transmitting mirror thereby enabling a plane containing a first optical path segment and the variable segment and a plane containing the variable segment and an output beam line to rotate as the controller adjusts the position of the robot mounted optical assembly, characterized in that the transmitting mirror is mounted on a transmitting mirror gimbal, in that the receiving mirror is mounted on a receiving mirror gimbal, further in that the transmitting mirror has an adjustable angle of incidence relative to the first optical path segment to direct the laser energy in the variable direction of the variable segment and the receiving mirror has an adjustable angle of incidence relative to the variable segment to reflect the laser energy to establish an output beam line towards the target surface, further in that the controller adjusts the angle of incidence of the transmitting mirror to change the variable direction of the variable segment, and that the controller adjusts the angle of incidence of the receiving mirror in order to move the output beam line for the laser energy among target positions on the target surface. beam delivery optics having adjustable components arranged to receive the laser energy from an output of the source of laser energy and direct the laser energy along an optical path toward the target surface, the adjustable components comprising an adjustable transmitting mirror and a robot mounted optical assembly incorporating an adjustable receiving mirror, and the optical path including a variable segment that separates the transmitting mirror and the receiving mirror and is straight, the variable segment having a variable length and variable direction through air between the transmitting mirror and the receiving mirror the receiving mirror having a position adjustable in three dimensions relative to the transmitting mirror by adjusting a position of the robot mounted optical assembly; and a controller (112, 113, 114), coupled to the adjustable components of the beam delivery optics, to adjust the position of the robot mounted optical assembly to change the variable length of the variable segment, and the variable direction of the variable segment is determined by controlling an angle setting of the transmitting mirror thereby enabling a plane containing a first optical path segment and the variable segment and a plane containing the variable segment and an output beam line to rotate as the controller adjusts the position of the robot mounted optical assembly, characterized in that the transmitting mirror is mounted on a transmitting mirror gimbal, in that the receiving mirror is mounted on a receiving mirror gimbal, further in that the transmitting mirror has an adjustable angle of incidence relative to the first optical path segment to direct the laser energy in the variable direction of the variable segment and the receiving mirror has an adjustable angle of incidence relative to the variable segment to reflect the laser energy to establish an output beam line towards the target surface, further in that the controller adjusts the angle of incidence of the transmitting mirror to change the variable direction of the variable segment, and that the controller adjusts the angle of incidence of the receiving mirror in order to move the output beam line for the laser energy among target positions on the target surface.