It is the selling point of green laser pointer

With other rangefinder (as compared to the microwave range finders, optical range finder, etc.), laser rangefinder with detection distance, ranging accuracy, strong anti-jamming, privacy, memory, small size, light weight , and high repetition rate. The classification and the principle of laser range finder. According to the different measurement methods, laser ranging can be divided into a pulse ranging method and phase ranging France, the former measurement accuracy is relatively low, for military and engineering measurement accuracy requirements of the occasion is not too high; the latter is relatively high measurement accuracy has been widely used in the measurement of the earth and engineering. Ranging laser pulse. The laser pulse ranging principle. Because the speed of light is constant, the propagation of light along a straight line, by measuring the beam in the test distance to and from the time can be calculated straight-line distance between two points. The emitter of  green laser pointer will send various orders to the receiver.It is the selling point of  green laser pointer
The laser pulse ranging principle is controlled by a laser pulse timer to open the door to accept the return of the laser pulse control timer closed, measure the round-trip propagation time of the laser beam in the test distance, to complete ranging. The formula is as follows: the structure of the laser pulse range finder. A simplified block diagram of the laser pulse range finder is shown in Figure 3.9. Its process as follows: When the rangefinder at the target, the laser on the issue of a strong very narrow pulses of light, this light pulse compression divergence angle after launch telescope. Out in the light pulse emission at the same time, in which a tiny fraction of the light immediately by two reflector into the receive telescope after the filter to reach the photoelectric converter into electrical signals, ie, light pulses into electrical pulses. The electrical pulse after after the amplifier shaping into a time measurement system to start the timer. The wireless presenter green laser pointer has many functions. Construction survey and large-scale component assembly, commonly used laser level to establish the horizontal or horizontal line. Laser Level and Digital Level Comparison and Improvement program. Laser Level and Digital Level comparison. 1960s, developed a laser level, which is a water level using a laser beam instead of the natural light reflection optical path. Representative is focusing the laser level and the semiconductor laser level, they greatly improve the efficiency and accuracy of the measurements, but they are only using a horizontal laser beam leveling, not at the same time the line of sight (horizontal distance) measurements. In addition, the laser spot center coordinates is artificial reading vernier caliper to achieve, which makes the measurement accuracy is relatively low, human error, the relatively low degree of automation. The technology of  green laser pointer  is revised according to the requirement of the customer.