New polarization and brightness curves as function of scattering angle are studied at _= 632.8 nm and 543.5 nm using PROGRA2 instruments (Propriétés Optiques des Grains Astronomiques et Atmosphériques) for different kinds of soot samples and carbon-black samples levitating in a cloud and deposited on a surface. The soot samples are generated under different combustion conditions, thus affecting their optical properties. A soot generator was also used to study fresh samples issued from propane combustion. A comparison between soot levitating on a cloud and deposited on surface was discussed. Finally these curves are compared to those produced by different kind of sand. The amplitudes of polarization produced by soot differ significantly depending on the primary particle diameter and on size distribution. These curves alone are then not sufficient to estimate the nature of the solid agglomerates that could be detected by remote measurements in the stratosphere. On the other hand the curves of brightness produced by these samples show a behavior different from those produced by the sand samples and that produced by interplanetary dust. It is therefore important in the interpretation of stratospheric measurements to combine the brightness with the polarization curves to identify the nature of the agglomerates and to provide information on the nature of soot detected as the primary particle diameter and size distribution.
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机译：使用PROGRA2仪器（PropriétésOptiques des Grains Astronomiques etAtmosphériques）在_ = 632.8 nm和543.5 nm上研究了新的偏振和亮度曲线，它们是散射角的函数，用于处理不同类型的烟尘样品和悬浮在云中并沉积在炭黑上的炭黑样品表面。烟灰样品是在不同的燃烧条件下产生的，因此会影响其光学性能。烟尘发生器还用于研究丙烷燃烧产生的新鲜样品。讨论了悬浮在云上和沉积在表面上的烟灰的比较。最后，将这些曲线与不同类型的沙子产生的曲线进行比较。由烟灰产生的极化幅度根据一次粒径和尺寸分布而有很大不同。这样，仅这些曲线就不足以估计可通过平流层中的远程测量检测到的固体团聚体的性质。另一方面，由这些样品产生的亮度曲线显示出与由沙子样品产生的和由行星际尘埃产生的亮度不同的行为。因此，在平流层测量的解释中，重要的是将亮度与偏振曲线结合起来，以识别附聚物的性质，并提供有关检测到的烟灰性质的信息（作为主要粒径和尺寸分布）。
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