A portable optical axis detection module for dual-wavelength laser reconnaissance system

Abstract

The invention discloses a portable optical axis detection module for a dual-wavelength laser reconnaissance system. The 1.06um laser and the 1.57um laser output by the equipment to be tested are combined by a beam-combining prism and then incident on a beam-splitting compensation prism group through a focusing objective lens group. , the spectroscopic compensation prism group outputs the first reflected light with a wavelength of 1.06um, the second reflected light with a wavelength of 450-650nm and the third reflected light with a wavelength of 1.57um, the attenuated first reflected light, the attenuated The third reflected light and the second reflected light are combined by the beam-combining compensation prism and then enter the beam splitting prism, and the two parts of light split by the beam splitting prism respectively enter the InGaAs imaging component and the reticle. The invention can realize accurate detection of laser optical axis pointing stability and optical axis parallelism error of a dual-wavelength laser reconnaissance system in an all-weather environment, and has the characteristics of simplicity, portability, reliability and high precision.

Description

technical field [0001] The invention relates to the field of photoelectric detection, and more specifically relates to a portable optical axis detection module for a dual-wavelength laser reconnaissance system, which can realize on-site detection of laser optical axis pointing stability and optical axis parallelism errors in a dual-wavelength laser reconnaissance system in an all-weather environment Dynamic quantitative and accurate detection, with the characteristics of simplicity, portability, reliability and high precision. Background technique [0002] Dual-wavelength laser reconnaissance equipment integrates TV / visible light targeting, 1.06um / 1.57um dual-wavelength laser ranging and other functions, and some special equipment also includes laser irradiation indication function. Among them, the parallelism of multiple optical axes and the pointing stability of the laser optical axis are the key indicators to measure the performance of this type of equipment. [0003] Th...

AI Technical Summary

Problems solved by technology

[0003] The existing optical axis detection methods mainly include target plate imaging method, long-distance target method, parallel light tube method, etc. The target plate imaging method makes the target plate according to the geometric axis position of each optical channel, and adjusts each optical axis to align with each other. Place the photosensitive material at the bull’s-eye position, and observe the position error between the laser spot and the set bull’s-eye through human eyes or equipment. This method is easy to operate, low in cost, and can be used in the field or indoors, but it is easily affected by human subjective factors. The light spot error is large, and the adjustment accuracy is poor; the long-distance target method selects a long-distance point-shaped target for calibration according to the equipment's operating distance and equipment accuracy requirements. This method does not require special detection equipment, and is easy to operate. It is greatly affected by the environment; the collimator method uses a certain caliber collimator, including two types of transmission type and reflection type. The reflection type has wide spectrum characteristics and can be used as a general detection method for photoelectric instruments and equipment, but each band shares the same optical path. , it is more troublesome to deal with single-wavelength laser energy attenuation. Generally, the transmission type can only meet a specific detection wavelength. For dual-wavelength lasers, it needs to be expanded on the basis of it.

In addition, the collimator method generally uses photographic paper or up-conversion material as the focusing spot collection material, which will have a certain impact on the optical axis detection

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