Infrared Spectrum Transmittance Analysis of Solid Smoke Based on MIE Scatter Theory

The influences of complex refractive index and particle diameter distribution on the spectral transmittance are studied by MIE scatter theory, the spectrum correlation problem of spectral transmittance in different cases is analyzed, the feasibility that using a single point of spectral transmittance to estimate other points is discussed. The results demonstrate that, Refractive index has a great influence on the spectral selectivity, Absorption index however has little effect on it; the particle diameter distributions have a great influence on spectral transmittance, if only contains a kind of particle, with little difference of particle diameter distribution, can be through a single point of spectral transmittance extrapolation other spectral transmittance, but if the difference is significant, is not feasible.