Shortwave infrared day and night remote multispectral imager and imaging method

Abstract

The invention discloses a shortwave infrared day and night remote multispectral imager and an imaging method. A light filter wheel splits light after optical signals pass through a shortwave infrared lens, and a detector component and an electronic portion complete photovoltaic conversion and image data acquisition and output images. A laser device outputs lasers of corresponding wavelengths for lightening according to current imaging wave bands and completes multispectral imaging matching with the light filter wheel. According to the shortwave infrared day and night remote multispectral imager and the imaging method, good atmosphere transmission characteristics of shortwave infrareds are used to perform remote multispectral observation; and shortwave infrared large-power tunable lasers which are invisible by human eyes are assisted to lighten corresponding bands, and night imaging is achieved.

Description

Technical field: [0001] The invention relates to a multi-spectral imager, in particular to an active short-wave infrared day and night long-distance multi-spectral imager and an imaging method. Background technique: [0002] The working band of the short-wave infrared imager is generally 0.9μm~2.5μm. Its imaging principle is the same as that of the visible light imaging of the human eye. It captures the reflected light of the target, so its imaging effect is close to visual imaging, and it is easy to identify targets in real-time monitoring. Many ground features have rich spectral characteristics in the short-wave infrared band, so multi-spectral imaging in this band can effectively realize target recognition. [0003] Short-wave infrared has a longer wavelength than visible light, and is relatively less affected by the atmosphere, aerosols, and tiny particles. Therefore, the atmospheric transmittance is high, the observation distance is long, and it has a certain ability to...

AI Technical Summary

Problems solved by technology

Moreover, the short-wave infrared laser cannot be seen by the human eye, making the instrument highly concealed

[0005] Existing spectral detection equipment such as short-wave infrared multispectral cameras or imaging spectrometers can only use sunlight to achieve daytime observations, and cannot be used in occasions that require day and night monitoring

At present, the imaging instruments that use short-wave infrared lasers to illuminate and image can realize simple night imaging functions, but ordinary lasers are illuminated by monochromatic light, and the signals of other wavelengths in the detector response band can only be obtained by relying on the glow of the night sky, which is very weak

Therefore, the instrument captures the reflection signal of ground objects at a specific wavelength, and the information is not rich. It is difficult to observe the target that happens to have a low albedo at this wavelength.

At the same time, this type of instrument does not have spectroscopic equipment, so it cannot realize multi-spectral imaging and effective target recognition

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