Correction of angular deviation and radial drift of laser beams

A correction element for the correction of radial displacement of laser beams due to thermal drift, comprising:

• a radial displacement non-symmetric optical element for redirecting a beam axis of a laser beam through a first corrective angle dependent upon a radial displacement of the beam axis from a centerline of the radial displacement non-symmetric optical element and
• directing the beam axis onto a focus area at a selected distance from the radial displacement non-symmetric optical element, wherein
• the magnitude of the corrective angle increasing with increasing radial displacement of the beam axis from the centerline of the radial displacement non-symmetric optical element, and
• a collimating non-symmetric optical element located at the focus area for redirecting the laser beam through a second corrective angle wherein the magnitude of the second corrective angle increases with one of decreasing radial displacement of the beam axis from a centerline of the collimating non-symmetric optical element and an increasing angle of incidence of the laser beam on the collimating non-symmetric optical element.

A correction element for the correction of at least one of an angular deviation of laser beams due to pointing instability and radial displacement of laser beams due to thermal drift, comprising:

• an angular deviation non-symmetric optical element for redirecting a beam axis of a laser beam through a first corrective angle so that the beam axis is parallel with an optimum centerline of the laser beams, wherein the first corrective angle increases with a decreasing angle of incidence of the laser beam on the angular deviation on-symmetric optical element,
• a radial displacement non-symmetric optical element for redirecting a beam axis of a laser beam through a second corrective angle dependent upon a radial displacement of the beam axis from a centerline of the radial displacement non-symmetric optical element and directing the beam axis onto a focus area at a selected distance from the radial displacement non-symmetric optical element, wherein the second corrective angle increases with increasing radial displacement of the beam axis from the centerline of the radial displacement non-symmetric optical element, and
• a collimating non-symmetric optical element located at the focus area for redirecting the laser beam through a third corrective angle wherein the magnitude of the third corrective angle increases with one of decreasing radial displacement of the beam axis from a centerline of the collimating non-symmetric optical element and an increasing angle of incidence of the laser beam on the collimating non-symmetric optical element.

A correction element for the correction of at least one of an angular deviation of laser beams due to pointing instability and radial displacement of laser beams due to thermal drift, comprising:

• a correcting non-symmetric optical element for
• redirecting a beam axis of a laser beam through a first corrective angle so that the beam axis is parallel with an optimum centerline of the laser beams, wherein the first corrective angle increases with a decreasing angle of incidence of the laser beam on the angular deviation non-symmetric optical element, and
• redirecting a beam axis of a laser beam through a second corrective angle dependent upon a radial displacement of the beam axis from a centerline of the radial displacement non-symmetric optical element and directing the beam axis onto a focus area at a selected distance from the radial displacement non-symmetric optical element, wherein the second corrective angle increases with increasing radial displacement of the beam axis from the centerline of the radial displacement non-symmetric optical element, and
• a collimating non-symmetric optical element located at the focus area for redirecting the laser beam through a third corrective angle wherein the magnitude of the third corrective angle increases with one of decreasing radial displacement of the beam axis from a centerline of the collimating non-symmetric optical element and an increasing angle of incidence of the laser beam on the collimating non-symmetric optical element.