FLIR Flashcards
what does FLIR stand for?
Forward looking Infrared
what frequencies of the electromagnetic spectrum are considered to be in the IR frequency range?
the range is 300 gigahertz to about 400 tetrahertz.
name the 3 IR bands of the electromagnetic spectrum
Near Infrared (NIR) Intermediate Infrared (IIR) Far Infrared (FIR)
what are some advantages in using IR for target detection?
- complete jamming is difficult
- military targets are usually good sources of IR
- smaller, lighter, less complex, less expensive
- high target resolution
What is the blackbody concept?
its an object that absorbs all radiation incident on it and emits the max radiation for any given temperature.
what is the emissivity of blackbody?
1.00
of all the parameters in determining IR characteristics, which on is the most important and why?
temperature is the most important. as temp of an object changes, the wavelength where peak radiation occurs shifts, and the total energy radiated varies.
what is the most critical component of any IR system?
Detector
what are the most common types of detectors?
bolometers
lead sulfide
phototubes
what are the 3 types of photodetectors?
photoconductive
photovoltaic
photoemissive
name 3 types of homing systems classified by their source of radiation
active
semi-active
passive
name 3 types of heat flow
convection
conduction
radiation
describe the basic principle of a laser
a device that produces or amplifies ultraviolet, visible or infrared radiation by controlled stimulated emission.
what determines the wavelength of light emitted by a laser?
type of material used in a laser
what is irradiace?
the amount of power per unit area
