Laser rangefinders are used a lot, but do you know the principle?


For golf enthusiasts, the rangefinder must be a weapon that everyone will use when playing. Many people even call the golf rangefinder the "15th pole" in the bag. The help of the rangefinder is still great, so let me take you to learn more about the principle of the rangefinder.

Laser rangefinders generally use two methods to measure distance: pulse method and phase method. The process of pulse distance measurement is that the laser light emitted by the rangefinder is received by the rangefinder after being reflected by the object to be measured, and the rangefinder records the round-trip time of the laser at the same time. Half of the product of the speed of light and the round-trip time is the distance between the rangefinder and the object being measured.

The accuracy of the pulse method to measure distance is generally about ±1 meter. In addition, the measurement blind zone of this type of rangefinder is generally about 5 meters.

The laser rangefinder is light in weight, small in size, simple to operate, fast and accurate, and its error is only one-fifth to one-hundredth of other optical rangefinders. It has been widely used in the following fields: electricity, water conservancy, Communication, environment, construction, geology, police, fire protection, blasting, navigation, railway, anti-terrorism/military, agriculture, forestry, real estate, leisure/outdoor sports, etc.

At the same time, the laser rangefinder is also an important technical equipment to improve the accuracy of tanks, aircraft, ships and artillery. As its price continues to decrease, the industry has gradually begun to use laser rangefinders. A number of new miniature rangefinders with the advantages of fast ranging, small size, and reliable performance have emerged at home and abroad, which can be widely used in industrial measurement and control, mines, ports and other fields.