Compact monocular multi-channel configurable multispectral imaging system

Abstract

The invention discloses a compact monocular multi-channel configurable multispectral imaging system, which comprises an optical lens interface for fixing the optical imaging lens; a composite beam splitter prism composed of three or more prisms glued together; a optical filter interface provided with three or more interfaces, wherein the interfaces are respectively used for fixing optical filter modules with different spectral bands so as to generate spectral information of different spectral bands; three or more groups of low spatial high spectral resolution sensors and high spatial low spectral resolution sensors used for performing photoelectric conversion on the spectral information to generate an electric signal; and an image acquisition processing system comprising an image processing module, an optical filter identification module, a memory, an information superposition module and an analysis module.

Description

technical field [0001] The invention belongs to the technical field of multi-spectral imaging remote sensing, and in particular relates to a compact monocular multi-channel multi-spectral imaging system, which can be used for multi-spectral measurement imaging and information acquisition of targets in an airborne, vehicle-mounted or portable manner. Background technique [0002] Since multispectral images contain multiple features representing target scene information, they are widely used in various fields such as remote sensing, medical treatment, natural disaster assessment, military reconnaissance, agricultural forestry, etc. The spectral information of its multiple channels not only satisfies general Compared with the hyperspectral camera, which has a small amount of data, it is easier to achieve "real-time" in post-processing, and it is more cost-effective. Therefore, multispectral cameras have always been widely used, but how to quickly and accurately collect high-reso...

AI Technical Summary

Problems solved by technology

[0004] 1. Monocular single-channel multi-camera combination method. In this method, each camera uses a filter and an imaging lens at the same time. Multiple cameras are placed in parallel to simultaneously image the target scene. This method The advantage lies in the simultaneous imaging of multiple spectral channels and high resolution, but the problem is that the volume is large, and the parallelism adjustment of multiple cameras is also very complicated in mass production.

[0005] 2. A monocular multi-channel camera using a rotating (linear) filter, this method uses a camera and an imaging lens, and uses a rotating filter or a linear filter between the lens and the camera to achieve different Band imaging method, the advantage of this method is that it realizes multi-channel spectral information collection without sacrificing resolution and small size, but because switching filters of different channels requires a certain delay, it reduces the It affects the real-time performance of collection, which is not conducive to the use on airborne platforms or fast collection occasions

[0006] 3. Multi-purpose multi-channel single camera, this method is to use a camera to perform region segmentation on the sensor target surface of the camera, each region corresponds to a different spectral band, and place a lens and a corresponding filter in its corresponding position , the advantage of this method is that under the condition of limited volume increase, the spectral information of multiple channels can be simultaneously collected for real-time imaging, which is conducive to the remote sensing observation of small UAVs. The disadvantage is that the image resolution of each channel becomes lower, and the corresponding The spatial resolution is also very low, and it is only suitable for low-altitude flight or observation occasions with large target features

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