The handheld laser rangefinder D5 is designed for outdoor measurement work with multiple measurement functions, including a dual zoom digital sight, a 2.5-inch color display screen, and a tilt sensor. The 4x zoom digital sight allows you to quickly aim at distant targets and can also be used in bright outdoor environments. In environments where laser points cannot be distinguished with the naked eye, you can easily identify laser points through a 2.4-inch high-definition color display screen for accurate long-distance measurement.
Laser rangefinder is an instrument that uses a certain parameter of modulated laser to measure the distance of a target. It is lightweight, small in size, easy to operate, fast and accurate, and its error is only one-fifth to one hundred times that of other optical rangefinders. The world's * * laser is the first ruby laser developed by scientist Mayman from Hughes Aircraft Company in 1960. The US military quickly conducted research on laser devices based on this foundation. In 1961, * * * laser rangefinders passed the US military's demonstration test, and after this, the laser rangefinders quickly entered the practical stage. Due to the continuous decline in the price of laser rangefinders, they are gradually being used in industry. A batch of new types of micro rangefinders with advantages such as fast ranging, small size, and reliable performance have emerged both domestically and internationally, which can be widely used in industrial measurement and control, mines, ports, and other fields.
The mainstream laser rangefinder in the current market is based on phase method. This is because laser rangefinders based on phase method can easily overcome a major drawback of ultrasonic rangefinders: excessive error, resulting in measurement accuracy reaching the millimeter level. The main drawbacks of laser rangefinders based on this method are complex circuits and short operating distances (around 100 meters, after the efforts of many scientific workers, there are now phase based laser rangefinders with operating distances of several hundred meters).
The phase method is similar to the method used for ultrasonic velocity measurement and distance measurement. The large measurement distance is usually several hundred meters, which can easily reach the order of millimeters. However, the large measurement distance of the distance measuring instrument designed according to this method is limited and cannot be extended. This method is mainly widely used abroad. Pulse laser ranging generally uses infrared laser, including near-infrared laser and mid infrared laser. There are visible and invisible lasers in this band. And the rangefinder based on this technology has low requirements for coherence, fast speed, simple implementation structure, high peak output power, high repetition frequency, and large range. Therefore, this project uses the pulse method to design a handheld laser rangefinder.
