3000 is not the exact or accurate number for the life time of green laser pointer
Pulsed laser rangefinder using pulse ranging, the measurement range is far smaller form, is used in the military for a variety of battlefield targets ranging usually tactical application of military laser rangefinder means of pulsed laser rangefinder . Laser rangefinder is generally composed of three parts of the laser transmitter, laser receiver and power. By the pulsed laser, the laser transmitter to transmit optical system, the sampler, as well as targeting the optical system, whose role is the high peak power laser pulses toward the target. The laser receiver by the receiving optical system, photoelectric detectors and amplifiers, the receiver circuit and the count display components, devices to receive diffuse the laser pulse reflected back from the target echo and calculate and display the target distance. Many customers who use this kind of green laser pointer recommend it.
The laser power from low voltage power supply of high voltage power supply box, whose role is to provide electricity. The laser rangefinder works by pulsed laser firing a single laser pulse or laser burst to the target, counter to measure the laser pulse to reach the target by the target to return to the round-trip time of the receiver, thereby computing the target distance. The course of their work: the first target, and then connected to the laser power supply, start the laser, a laser pulse signal through the launch of the optical system to aim at the target. The same time, the sampler collected the transmitted signal, as a pulse signal of the counter and opens the door to start the counter, IF oscillator would like to counter input IF pulse laser echoes reflected by the target through atmospheric transmission. When he or she works or camps in the wild place or open air and uses green laser pointer .
Entry into the receiving optical system, the role of the photodetector, into electrical pulses, after the amplifier to enter the counter as a calculator close signal, the counter stops counting. Counter from start to close during the incoming clock frequency of the pulse number, after computing the target distance is displayed on the display. The laser rangefinder is a project of the earliest applications of lasers in the military. The world's first laser rangefinder was born in Hughes Aircraft Company, known as the Cradock type 1, after the company have developed several experimental military laser rangefinder in the army test and evaluation results show that the laser ranging The machine can be used as a new range finder instead of the original equipment, optical rangefinder. Besides, laser pointer has several LED indication lights.
In 1971, the U.S. Army First equipped with a type AN/GVS-3 ruby laser rangefinder, used for artillery forward observers or observation. Since then, a variety of signal detection using laser range finders have been equipped national army. After 30 years of development, the military laser rangefinder has been updated for two generations, research and development of three generations. The first generation of laser ranging using the launch 0.6943um infrared ruby laser and photomultiplier detector is the first advent of the laser rangefinder, a small amount of the armed forces of the early 1970s, such as United States AN/GVS-3, Japan's 70-style for its covert, low efficiency, large size, heavy weight, power consumption and more will soon be replaced by second-generation laser rangefinder. This function of green laser pointer can be used to point at the star.
Second-generation laser rangefinder using near-infrared emission 1.06um neodymium laser (Nd: YAG laser, a small number of neodymium glass laser) and the silicon photodiode or silicon avalanche diode detector. The second generation is better than the first generation of concealment, high efficiency, light and small, low power consumption, so the second-generation laser range finder, a small development has progressed rapidly. The United States developed in 1977 called AN/GVS-5 first a small hand-held use of Nd: YAG laser rangefinder, the shape structure of the aircraft used for the first time the the binoculars structure suitable for handheld use, size and 7 * 50 military binoculars of a standard equivalent to the total weight is only 2kg. green laser is suitable to the customer who needs the high power.
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