What is a PRF code?
A pulse repetition frequency (PRF) code is used for the laser designator, the laser spot tracker (LST), and the laser guided weapon (LGW). Each must use the same code when operating together. An agreed upon direction of attack is necessary. The LST or LGW must be able to acquire the energy re- flected from the target.
What does a laser designator do?
Laser designators have been commonly deployed by the military to allow ground forces and unmanned aerial vehicles to “paint a target” by illuminating them with a pulse-coded invisible laser, which can then be detected and locked onto by the weapon’s targeting system.
What is a coded laser?
What Is Laser Coding? Laser coding technology is a popular non-contact option for permanent, high-quality coding. Laser systems are great for permanent coding of text, time and date, bar codes, serial numbers and more.
What are the units for PRF?
PRF = pulse repetition frequency. PRF has units of time-1 and is commonly expressed in Hz (1 Hz = 1/s) or as pulses per second (pps). PRF is the number of pulses transmitted per second and is equal to the inverse of PRT.
What is difference between frequency and PRF?
In radar, a radio signal of a particular carrier frequency is turned on and off; the term “frequency” refers to the carrier, while the PRF refers to the number of switches. Both are measured in terms of cycle per second, or hertz. The PRF is normally much lower than the frequency.
What is the difference between IR and laser?
Infrared (IR) refers to a part of the EM spectrum below the visible light region but above Tera hertz. Laser diodes refer to a semiconductor device that emits coherent radiation. Lasers emit the wavelength of light that they are designed for, some are visible, some are IR, some are ultra violet.
What is PRF and PRT?
PRF stands for Pulse Repetition Frequency. It is equal to number of pulses which are transmitted per second. PRT stands for Pulse Repetition Time. The time between beginning of one pulse and start of next pulse is known as Pulse Repetition Time.
What color are IR lasers?
Colors and wavelengths
| Color | Wavelength(s) |
|---|---|
| Red | 638 nm, 650 nm, 670 nm |
| Orange | 593 nm |
| Yellow | 589 nm, 593 nm |
| Green | 532 nm, 515/520 nm |
Are green lasers infrared?
Green Laser Infrared Emission The most common green lasers are actually infrared lasers, emitting natively 1064nm light. There is a second crystal used to double the frequency, and half the wavelength down to 532nm, providing green light. The infrared light should then be filtered out to get only green output.
What is a PRF code on a laser?
(1) The laser designator places coded laser energy on stationary or moving targets. Reflected coded laser energy provides guidance information for terminal homing munitions such as Hellfire and Copperhead. The code transmitted by the designator is manually set on the G/VLLD PRF code switches by the observer.
What are the requirements of a laser designator?
(1) The PRF code of the laser designator and the laser acquisition device or LGM must be the same. (2) An agreed-upon direction of attack is necessary. The laser acquisition device or LGM must be able to “sense” the reflected energy from the laser designation device.
What is an laser designation?
Laser designators provide targeting for laser-guided bombs, missiles, or precision artillery munitions, such as the Paveway series of bombs, AGM-114 Hellfire, or the M712 Copperhead round, respectively.
What is the purpose of the laser designator in the pod?
The pod uses an imaging infrared sensor and laser designator/ranger for navigational updates, target acquisition and recognition, and weapon delivery. The laser designator gives guidance for laser-guided weapons and has four-digit cockpit-selectable PRF or PIM coding. d.
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