| 摘要 |
A system (200) for effecting low-order aberration correction of a beam of electromagnetic energy. The inventive system (200) includes a first mechanism (220), including at least one articulated optical element (222), for receiving and correcting the beam; a second mechanism (270) for generating a signal indicative of the aberrations to be corrected; and a third mechanism (226), responsive to the second mechanism (270), for adjusting the position of the optical element (222) to generate an output beam that is at least partially compensated with respect to the aberrations. In the preferred embodiment, the first mechanism (220) is a telescope comprising a fixed primary lens or mirror (224) and an articulated secondary lens or mirror (222). The second mechanism (270) includes a wavefront error sensor for detecting aberrations in the received beam. The third mechanism includes a processor (320) responsive to the second mechanism (270) for providing a correction signal, and six linear actuator struts (226) arranged in a non-redundant hexapod configuration to move the secondary lens or mirror (222) in at least five degrees-of-freedom in response to the correction signal.
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