But these detectors are more complex than visible spectrum cameras, since they themselves emit infraredradiation... This is the infrared spectrum, a light radiation whose wavelengths vary between around 1 and 30 micrometers. The detection of infraredradiation is of course of interest to the Defence for night time combat or for guiding missiles
Thermography cameras detect radiation in the infrared range of the electromagnetic spectrum (roughly 3 5 or 8 12 m) and produce images of that radiation. Since infraredradiation is emitted by all objects based on their temperatures, according to the black body radiation law, thermography makes it possible to" see" one's environment with or without visible illumination
The flow infraredradiation in the immediate vicinity of a transporter heats its wall, as well as the orbiter on board under its protection, which is more critical. These simulations lead to a decision in favour of a blunt biconic geometry for the transport vehicle, rather than an Apollo capsule type geometry (another possible candidate for aerocapture)
We are looking at the magnetic field as well as the electric field, and we are trying to improve the quality of the films, so they produce more infra-redradiation for a given field. Visualization by EMIR of electric field" leaks" from points of the canopy of the cockpit of a Rafale aircraft
"In order for a plane to emit less infraredradiation, which makes it detectable, the air entries are not in a direct line with the engine", states the researcher. "The ducts are therefore very bent, but this disturbs flow by creating separation points that risk interfering with the correct operation of the engine
Its principle is equivalent to that of radar (lidar is also sometimes called laser radar), using visible light or infraredradiation rather than radar waves. Lidars transmit a powerful laser pulse into the atmosphere, where light interacts with particles and molecules in the air
