Comparison of the performance of 3- to 5- and 8- to 12-µm infrared cameras

Abstract

An image based comparison ofmodeled infrared cameras in the medium-wave (MW) and longwave (LW) bands is done using the TARDEC Thermal Image Model (M) and LOWTRAN7. A state-of-the-art staring focal plane array (FPA), a common module scanning FLIR, and a scanning dual-band sensor are modeled. The simulations using TFIM demonstrate the imaging perfonnance ofthe cameras as well as the degradation caused by the atmosphere in the two bands. Atmospheric degradation to the image is simulated in rain and fog in northern hemisphere environments.

Online Monitoring of Torpedo Car Shells Based on Equal Angle Scanning

“…Low-cost area array thermal imaging cameras mainly use uncooled long-wave infrared technology (8-14 microns). There are phenomena such as large temperature measurement errors in hightemperature sections, inaccurate data, poor environmental adaptability [13,14].According to Wien's law, to accurately measure the temperature, the mid-wave infrared imaging technology can obtain the best performance. The cooling medium wave infrared scanning temperature measurement system can cool the detector thermoelectricity and compensate the temperature, which can output data steadily day and night; the unique large field of view (0-180 degrees) is especially suitable for online detection of moving objects; in order to adapt to rain, snow, fog and other weather, the installation distance should not be too far; in addition, it can simulate the lining thickness and locate the fault accurately.…”

Online Monitoring of Torpedo Car Shells Based on Equal Angle Scanning

“…Low-cost area array thermal imaging cameras mainly use uncooled long-wave infrared technology (8-14 microns). There are phenomena such as large temperature measurement errors in high-temperature sections, inaccurate data, and poor environmental adaptability [15,16]. According to Wien's law, to accurately measure the temperature, the mid-wave infrared imaging technology can obtain the best performance.…”

Comparison of modeled atmosphere-dependent range performance of long-wave and mid-wave IR imagers

“…high relative humidity (RH) and marine environments) [3,4], whereas in the cases of smoke and light fog LWIR offers better penetration [5], while for rain [5] and snow [6,7] there is no substantial difference between the two bands. Further, MWIR generally performs better at high ambient temperatures and LWIR at low ambient temperatures [4].…”

“…(a) atmospheric transmission [1,5,8], (b) the signal-to-noise ratio [3,9], (c) noise equivalent temperature difference (NETD) [1,[10][11][12][13][14][15], (d) minimum resolvable temperature difference (MRTD) [10], (e) range [16][17][18], (f) some other parameter [19].…”