Calibrated Mid-wave Infrared (IR) (MidIR) and Long-wave IR (LWIR) Stokes and Degree-of-Liner Polarization (DOLP)
ARMY RESEARCH LAB ADELPHI MD COMPUTATIONAL AND INFORMATION SCIENCES DIRECTORATE
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We present radiometric and polarimetric calibrated imagery recorded in both the mid-wave infrared IR MidIR and long-wave IR LWIR as a function of diurnal variation over several multiday periods. We compare differences in polarimetric and conventional thermal imagery for both IR atmospheric transmission windows, i.e., the 3-5 mu and 8-12 mu regions. Meteorological parameters measured during the study include temperature, relative humidity, wind speeddirection, precipitation, and ambient atmospheric IR loading. The two camera systems used in the study differed significantly in design. The LWIR polarimetric sensor utilizes a spinning achromatic retarder and is best suited for static scenes, while the MidIR system is based on a division-of-aperture design and is capable of recording polarimetric imagery of targets that are rapidly moving. Examples of both So conventional thermal and degree-of-linear polarization DOLP imagery are presented and compared.
- Infrared Detection and Detectors