| 摘要 |
PURPOSE:To set plural kinds of frequencies so that a laser light consisting of plural kinds of wavelengths is emitted from an acoustooptic modulator at the same angle, by making this laser light incident to the single acoustooptic modulator and allowing the modulator to propagate acoustic waves consisting of plural kinds of frequencies. CONSTITUTION:The laser light emitted from a laser 14 which emits light with plural kinds of wavelengths is inputted to an AO modulator 15. The AO modulator 15 is driven by an AO modulator driving device 16 and emits the laser light consisting of plural kinds of wavelengths at the same angle. Consequently, the laser light consisting of plural kinds of wavelengths is condensed in the same position on a color film 17 by a lens 8. A rotary polyhedral mirror 10 allows the laser light to scan the surface of the film 17, and optical recording is performed on all of the surface of the film when the film is carried. |
