Imaging spectroradiometer for the 8-12-mu m region with a 3-cm(-1) passband acousto-optic tunable filter

摘要

An imaging spectroradiometer was built covering the 8-12-mu m region with an acousto-optic tunable filter with a 3-cm(-1) passband, along with a commercial infrared camera. The system field of view was 7.5 degrees x 10 degrees, and the resolution was nearly diffraction limited. Real-time images were digitally recorded, and software was used to enhance the data and increase the camera temperature sensitivity to less than a millidegree Kelvin. The minimum discernible intensity was 10(-3) that of a globar source at 900 K, and emission from SF6 could be imaged at ambient temperatures. (C) 1998 Optical Society of America. [References: 19]