| 摘要 |
A surface-scanning system of the kind that defines an optical path and has a scanning assembly comprised of X and Y angularly oscillating scanners for deflecting a portion of the path, and first and second optical elements aligned with stationary portions of the optical path and driven in rectilinear oscillating motion along the path to provide focus correction respectively for the X and Y scanners. The X direction scanner is of the resonant type and has a mechanism for dynamically tuning its resonant frequency, the first optical element is mounted to oscillate in rectilinear resonant motion, and the tuning mechanism of the X direction scanner is arranged to receive a signal representing the oscillations of the first optical element and to tune the resonant frequency of the X direction scanner to synchronize its resonant motion with that of the first optical element.
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