| 摘要 |
A four-pass self-tracking beam delivery system includes means for directing an input beam (14) along a first path (14a') to a first position on at least a locally flat surface (24a) of a target; a corner reflector (38a, c) for receiving the first reflection of the input beam along a second path (14b') from the first position and redirecting it along a third path (14c') parallel to the second path to a second position on the flat surface; and a return reflector for receiving the input beam along a fourth path (14d') from the second position and redirecting it as a reflecting beam. |
