Detection device for laser rangefinder

Abstract

The invention discloses a detection device for a laser rangefinder, composed of a sampler, an absorber, a multi-target simulator, a standard target and a variable diaphragm. The laser rangefinder emits a laser directed at the detection device; the sampler and the multi-target simulator simulate a laser target echo, and obtain an receiving optical axis and the minimum detectable power of the laser rangefinder via the maximum distance ranging result; a laser emitting optical axis and a collimation optical axis are corrected via a laser spot position and an axis distance; and the emission and the receiving of the laser rangefinder are quantitatively associated, in order to realize a ranging capacity evaluation of the laser rangefinder. The device disclosed by the invention has no need to be supplied with power, and is simple in operation and low in cost.

Description

technical field [0001] The detection field of the laser range finder of the present invention mainly relates to a measuring device for detecting and calibrating the laser range finder at the site where the laser range finder is used. Calibrated measuring methods and measuring devices. Background technique [0002] Whether the performance and technical indicators of the laser rangefinder are normal or not is the most concerned by users. The maximum range, minimum range, distance accuracy, and extinction ratio of the laser rangefinder for different targets under certain environmental conditions are the main technical indicators for the evaluation of the rangefinder capability. Other technical indicators that affect the performance of the laser range finder include the beam divergence angle of the emitted laser, the laser spot mode, the jitter of the laser optical axis, the peak power of the laser, the minimum detectable power of the laser receiving system, the laser emitting ...

AI Technical Summary

Problems solved by technology

The photoelectric simulation method mainly uses fast photodetectors, delay circuits, analog light sources and standard attenuators. The emitted laser energy of the laser rangefinder is not directly related to the received laser energy, and the optical axis of the simulated light source and the receiving system of the laser rangefinder is aligned. Quasi-debugging is difficult

The optical fiber simulation method usually uses a certain length of optical fiber to make a standard distance simulator, samples and delays the laser pulse, and inputs the laser pulse output from the optical fiber into the receiving system of the laser rangefinder for a single distance simulation, and one optical fiber can only simulate One distance; the calibration methods of the simulated distance and laser energy attenuation loss of the standard distance simulator include the truncation method, the insertion method, the backscattering method and the comparison method, which have the disadvantages of large measurement uncertainty and damage to the optical fiber

The calibration of the laser emitting optical axis and the aiming optical axis of the laser rangefinder usually adopts the focusing method of a large-diameter parabolic mirror. There are deficiencies that the target surface at the focal plane is easy to be damaged and invisible, which affects the calibration accuracy. The laser receiving optical axis usually adopts a structural guarantee.

There is no relevant report on the direct and comprehensive detection of the laser energy emitted by the laser range finder, the distance, the minimum detectable laser power of the receiving system, and the coaxiality of the optical axis.

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