| 摘要 |
An optical scanner for providing a deviation of electromagnetic radiation wherein the deviation varies in time. At least a first Risley pair has a first pair of optical elements and a second Risley pair has a second pair of optical elements. The optical elements in the first Risley pair are arranged to counter-rotate at a first rotation rate. The optical elements of the second Risley pair are arranged to counter-rotate at a second rotation rate in a manner so that a desired time dependency of the deviation of the radiation is obtained. |
