本文根据球形粒子的米(Mie)散射原理计算了光学粒子计数器的散射相函数和仪器响应曲线。根据被测粒子的折射率对测量结果做出订正。在研究大气气溶胶粒子尺寸谱变化规律时,这种订正是很重要的。文中举例说明了实际订正方法。

Scattering angular function and responsibility of an optical particle counter are calculated by Using Mie scattering theory of spherical particle in this paper. The calculations indicate that when non-absorptive particles are measured, the 60?-scattering device is better than the 90°-scattering one. When absorptive particles are measured the measurement results of both devices are dependent on the refraction of the particles, so that it is possible to generate a considerable error. However, aftor the responsibilities of these devices were calculated, it is possible to correct the measnremont results upon refraction of the particles. This is important for size distribution of the atmosphorio aerosol.