Optical image fusion system and method for infrared unit and night vision device

Abstract

The invention provides an optical image fusion system and method for an infrared unit and a night vision device. The system comprises a night vision device. A beam splitter including a first side surface and a second side surface that are opposite to each other is arranged obliquely at the upstream of the light path of the night vision device. Long-wave infrared light emitted by a target object is reflected by the first side surface and the reflected light passes through a first light converging device; near-infrared light of the target object passes through the first side surface and the second side surface successively and then enters the night vision device; the reflected light passes through the first light converging device and then the light is imaged at a photodetector; an electrical signal output by the photodetector is sent to a processing unit; the processing unit converts the electrical signal into an image signal; a display displays a visible light image of thermal imaging of the corresponding target object according to the image signal; the visible light image is converged by a second light converging device and then the converged light is reflected by the second side surface; and the reflected light enters the night vision device. The optical image fusion system has an advantage of point-to-point fusion.

Description

technical field [0001] The invention relates to image fusion, in particular to an optical image fusion system and method for infrared and night vision devices. Background technique [0002] At present, tens of millions of thermal imaging cameras and night vision devices have been deployed around the world. Infrared thermal imaging converts optical images into electronic image outputs, and night vision devices use all-optical images. [0003] The resolution and sensitivity of the night vision device are very high, but in the wild, the bushes and vegetation are green, and the clothes of military vehicles and soldiers are also green, so the contrast is very low; Trees and grass are much taller, so the contrast is nice. However, if in the desert, there are few trees and grass, and the environment is yellow, the contrast of the night vision device is very good. However, because the desert is hot, the ambient temperature is very high, which is similar to or even higher than the ...

AI Technical Summary

Problems solved by technology

The cost of this optical fusion method is very high, and it is difficult to popularize it in the existing tens of millions of night vision devices

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