Optical calibrating apparatus and method of laser ranging system

Abstract

It is a laser distance-finding system optics calibration apparatus which comprises receiving optics system and laser and is characterized by the following: there is located with a receiving angular field stimulate laser in front of the receiving optics system; there is located with parallel light tube at the back of the receiving optics system and the laser; there is located with a image screen vertical to its main axis behind the parallel light tube; there is a surface array CCD behind the image screen which is connected with computer; The output end RS322 serial port and laser are connected with the receiving angular field stimulate laser outer trigger power.

Description

Technical field: [0001] The invention relates to laser ranging, in particular to an optical calibration device and method for a laser ranging system. Background technique: [0002] The earth observation laser ranging system is developed from the airborne laser altimetry technology, and the off-machine point height measurement was realized in the early stage, but the accuracy is poor. Due to the popularization of GPS technology, the measurement accuracy has improved rapidly. [0003] The basic working principle of the laser ranging system is: by measuring the time difference between emitting the laser and receiving the laser echo to obtain the distance traveled by the light during the period, and then obtain the distance value. [0004] The performance of a laser altimeter / rangefinder largely refers to its ranging capability, i.e. maximum range. For long-distance laser altimeters / rangefinders (above 20km), the maximum range index is particularly important, which directly de...

AI Technical Summary

Problems solved by technology

The biggest problem in the traditional method is that the optical calibration work depends entirely on the staff to observe the optical imaging effect with the naked eye to judge the overlapping degree of the transmitting field of view and the receiving field of view, which is greatly affected by subjective factors, and cannot quantitatively give the transmitting and receiving fields of view The degree of coincidence limits the accuracy of optical calibration

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