| 摘要 |
An achromatic-type scanning optical arrangement includes a laser source, a first optical system for converging a beam of light emanating from the laser source, a deflecting device for deflecting the beam of light converged by the first optical system and a second optical system for focusing the beam of light deflected by the deflecting device onto a predetermined position. The entire optical system including the first optical system (12) and the second optical system is corrected for chromatic aberration, as a whole, to eliminate the adverse influence of wavelength variations in the laser source upon variations in the focus position of the aforesaid beam of light.
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