| 摘要 |
There is provided a scanning optical system used with a deflection mirror that produces sinusoidal vibrations. The scanning optical system includes a first lens having a positive power, and a second lens having a negative power. In this configuration, the first lens and the second lens are arranged in this order from a deflection mirror side. Further, the scanning optical system has an arcsine property and satisfies a condition: <?in-line-formulae description="In-line Formulae" end="lead"?>-1.15<f1/f2<-0.70 (1)<?in-line-formulae description="In-line Formulae" end="tail"?> where f 1 (mm) represents a focal length of the first lens, and f 2 (mm) represents a focal length of the second lens.
|
