#Cd pbs cut off wavelength skin
IR cannot be seen with the human eye but can be felt by the skin as warmth. As explained earlier, IR is electromagnetic radiation with wavelengths longer than those of visible light and shorter than those of microwaves. The most fundamental property of infrared (IR) is also the one most important to the military: warm materials emit a significant amount of IR radiation. Passive detection and tracking of a target’s radiation by an airborne or ground optical sensor give no warning to the target unlike tracking by radar. This direct emission enables passive detection. In general, with IR sensor (and to a lesser extent, CCD sensor in daylight) no illumination is required because radiation come from targets itself. The IR spectrum is spread out from 1 to 1000 µm, which is often sub-divided into three regions: The visual light spectrum is between 0.3 and 07 microns The common unit of wavelength for EO system is micron: Due to the very big number involved with frequency, the specification of EO systems is often referred to by wavelength. EO systems include but are not limited to: lasers, photometry, infrared, and other types of visible, and UV imaging systems.Īs can be seen from the diagram, Electro-optical sensors cover the frequency range from 10^4 GHz to 10^6 GHz. EO systems operate in the optical spectrum, which is from 0.01 to 1000 micrometers. Another often-used misnomer is referring to an EO spectrum. Actually, almost all “EO/IR” systems are EO systems as defined above. The use of EO in this context is a misnomer. In the popularly used term “EO/IR,” the EO is typically used to mean visible or laser systems. Most infrared (IR) sensors, for example, are EO systems.
By one definition EO is the science and technology of the generation, modulation, detection, and measurement, or display of optical radiation by electrical means. Electro-optics (EO), as the name implies, is a combination of electronics and optics.
These EO EW systems operate in the optical portion of the electromagnetic spectrum. There are many electro-optical warfare systems, which are analogous to radio frequency (RF) EW systems.
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