Laser/television common optical path system with real-time axis calibration function and use and axis calibration method

Abstract

The invention discloses a laser / television common optical path system and method with a real-time axis calibration function. The device comprises an optical bench, a laser illuminator, a television support, a cubic beam splitter prism assembly, an objective lens assembly, a filter assembly, an image collector, a pyramid assembly and the like. The image collector, the filter assembly, the cubic beam splitter prism assembly and the objective lens assembly are arranged along the optical axis of the system and fixed to the television support, and the filter assembly can horizontally move out of anoptical path. The television bracket is arranged on the optical bench; the pyramid assembly is arranged at a light outlet of the objective lens assembly; the laser illuminator is installed on the optical bench, and the emergent light is distributed perpendicular to the optical axis of the system. During work, the system collects images through the image collector, and meanwhile, laser irradiationand distance measurement of the system and laser / television light path self-axis-correction are realized in a camera shooting mode through the cut-in and cut-out pyramid assembly and the filter assembly. The laser / television imaging common-optical-path all-in-one machine system realizes a self-axis-correction function, improves the consistency of optical axes of a system television and a laser sensor through real-time self-axis-correction, and is compact in structure, small in size and light in weight.

Description

technical field [0001] The invention belongs to the field of precision optics, and relates to an optical imaging system, in particular to a laser / television common optical path system with real-time axis alignment function and its use and axis alignment method. Background technique [0002] With the continuous development of science and technology, the observation and aiming windows of the airborne photoelectric sighting and sighting system also show the trend of multi-axis and multi-spectrum. Among them, the visible light TV sighting system and the laser ranging irradiation photoelectric system have been widely used. The consistency between the optical axis of the visible light sight and the optical axis of the laser range finder directly affects the performance of the entire photoelectric sighting system. However, in the actual use of the optoelectronic system, due to the limitation of processing and installation conditions and the influence of environmental factors, espec...

AI Technical Summary

Problems solved by technology

However, in the actual use of the optoelectronic system, due to the limitation of processing and installation conditions and the influence of environmental factors, especially the impact of the aircraft during flight, the overload caused by the deformation of the optical mechanical structure, the change of the optical path, thermal distortion, and the unevenness of the laser spot Uniformity and instability will cause changes in the optical axis during use, resulting in inconsistencies between the optical axis that has been calibrated on the ground and the optical axis illuminated by the laser rangefinder. The laser / TV common optical path system design technology and optical axis real-time adjustment technology , can effectively improve the consistency of the optical axis of the system

[0003] However, there are also many technical difficulties for the coaxial optical system, especially for the optical system with the same optical path of the laser photoelectric load and the TV camera photoelectric load, there is still a phenomenon that it is difficult to suppress the influence between imaging, laser irradiation and distance measurement

At present, the basic method used for system optical axis calibration is: to perform calibration within a period of use, during non-working periods of the system, and in a specific environment, and the calibration process is complicated, so it is difficult to realize the real-time online calibration function of the system optical axis; especially For the photoelectric system of the airborne pod, the consistency of the optical axis of the optical-mechanical system is calibrated and guaranteed by using collimator calibration methods on the ground. The calibration process is relatively complicated, and it is difficult to achieve real-time adjustment

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