Equipment and method for testing range capability of laser altimeter and diastimeter

Abstract

The invention is a device of measure distance finding ability of laser finder / range finder, and its character of composition: in the forward direction of the laser beam emitted by a laser emitting system of the laser finder, in sequence, it includes transmitting-reflecting mirror, reflecting mirror, attenuator, and simulated object, where there is an energy meter set in the transmitting direction of the transmitting-reflecting mirror, which makes an angle of 45 degrees with the light beam, so does the reflecting mirror and the two mirrors play the same role in turning the laser beam emitted to make the laser beam coaxial with the laser receiving system of the laser finder; also waveform display system. It has the advantages of simple device, convenient operation, indoor testing, no influence of environment, high measuring precision, etc.

Description

technical field [0001] The invention relates to the measurement of performance parameters of a laser altimeter and a laser rangefinder, in particular to a device and a method for measuring the distance measuring capability of a laser altimeter / rangefinder. Background technique: [0002] Both the laser altimeter and the laser range finder (hereinafter referred to as the laser altimeter) are composed of a laser emitting system and a laser receiving system, and its performance largely refers to its ranging capability, that is, the maximum range. Especially for long-distance laser altimeters (more than 20km), the maximum range index is particularly important. Due to the influence of various factors, it is unrealistic to measure the target at the maximum range distance on the ground, and the accuracy of the result is not high. [0003] The extinction coefficient method is one of the traditional laboratory methods for measuring the maximum range of a laser altimeter. Although th...

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Problems solved by technology

Since the diameter of the laser beam is much larger than that of the optical fiber, it is necessary to design an optical system to couple the laser beam. Therefore, the optical path of this type of detection equipment is complicated, and the alignment of the optical axis is difficult. At the same time, it is difficult to measure the delay of the optical fiber.

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