Abstract
As the infrared polarization imaging system detects the target and background radiation's intensity in a specific direction of polarization, it's necessary to study polarization properties of different objects and polarized radiation propagation in the atmosphere. Firstly, bi-directional reflectivity distribution function was used to analyze polarization properties of the reflection radiation by objects and a general expression of the degree of polarization was deduced. Through the expression, the reflection polarization properties influenced by the target's physical characteristics was simulated. Secondly, the atmospheric absorption coefficient and path radiation in infrared waveband were modeled and calculated by using MODTRAN software in some typical atmospheric conditions. Due to the infrared radiation scattered by the suspended particles in the atmosphere, the degree of polarization of the scene was attenuated with the transmission distance. The result of simulation experiments about the polarization properties of objects' reflection radiation coincides with the measured data well, which means that the theory is correct and robust. Considering the atmospheric effects on the transmission of polarization radiation makes calculated results more reasonable and accurate.
| Original language | English |
|---|---|
| Pages (from-to) | 304-308 |
| Number of pages | 5 |
| Journal | Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering |
| Volume | 41 |
| Issue number | 2 |
| Publication status | Published - Feb 2012 |
Keywords
- Atmospheric effects
- Infrared polarization imaging
- Polarization transmission
- Simulation calculation