Principle of laser range finder phase method and pulse method laser range finder technology
The handheld laser rangefinder D5, which combines a 4x zoom digital sight, a 2.5-inch color display screen, and an inclination sensor, is designed specifically for outdoor measurement work and equipped with multiple measurement functions. The 4x zoom digital sight allows you to aim at distant targets faster and can also be used in bright outdoor environments. In an environment where the laser point cannot be distinguished by the naked eye, you can easily identify the laser point through a 2.4-inch high-definition color display screen and accurately perform long-distance measurements.
Laser rangefinder is an instrument that uses a certain parameter of modulated laser to measure the distance to a target. It is lightweight, small in size, easy to operate, fast and accurate, with an error of only one-fifth to one hundredth of other optical rangefinders. The world's first laser was the ruby laser developed by scientist Meiman from Hughes Aircraft Company in 1960. The US military quickly conducted research on laser devices based on this foundation. In 1961, the first laser rangefinder passed the US military demonstration test, and soon after that, the laser rangefinder entered the practical stage. Due to the continuous price reduction of laser rangefinders, they are gradually being used in industry. A new batch of miniature 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, mining, ports, and other fields.
Principle of Phase Method Laser Ranging Technology:
The phase method is similar to the ultrasonic velocity measurement method, with a maximum measurement distance usually of several hundred meters, which can easily reach the order of millimeters. However, the maximum measurement distance of the rangefinder designed according to this method is limited and cannot be expanded. This method is mainly widely used abroad. Pulse laser ranging generally uses infrared lasers, including near-infrared lasers and mid infrared lasers. There are visible and invisible types of lasers in this wavelength range. And based on this technology, the rangefinder requires low coherence, fast speed, simple implementation structure, high peak output power, high repetition rate, and wide range. Therefore, this project uses pulse method to design a handheld laser rangefinder.
