| 摘要 |
Apparatus for improving the efficiency and resolution of laser scanning systems using a multi-faceted rotating polygon (27) as the scanner device. An acousto-optic Bragg cell (30) is utilized as an active optical element to both modulate, in response to an electrical input signal, and deflect an incident laser beam so that the modulated beam is caused to follow, or track, one facet (28) of the scanner during a complete scan and to shift to the adjacent facet for the following scan. The scanning system is operated in a manner wherein during recording the images of the acoustic pulses at the surface of a recording medium (14) are made to move at the same relative velocity, in the opposite direction (13), as the velocity of the laser recording beam (12) whereby imaging of the input electrical signal on the recording medium surface (14) is accomplished without blurring. |
