Optical Discussion on the Principle of Laser Range Finder
Laser range finders generally use two methods to measure distance: pulse method and phase method. The process of pulse method ranging is that the laser emitted by the range finder is reflected by the measured object and then received by the range finder, and the range finder records the time of the laser back and forth 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 measured object.
The accuracy of distance measurement by pulse method is generally about ±1 meter. In addition, the measurement blind zone of this type of rangefinder is generally about 5 meters.
The laser range finder is light in weight, small in size, easy to operate, fast and accurate, and its error is only one-fifth to several hundredths of other optical range finders. It has been widely used in the following fields: electric power, 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 range finder is also an important technical equipment to improve the accuracy of tanks, aircraft, ships and artillery. Due to its continuous reduction in price, the industry has gradually begun to use laser range finders. At home and abroad, a batch of new miniature rangefinders with the advantages of fast ranging, small size and reliable performance have emerged, which can be widely used in industrial measurement and control, mines, ports and other fields.
