What Are the Applications of SWIR Cameras in Oceanography and Meteorology?

The SWIR band is the key to hyperspectral imaging, this is because this band can provide valuable quantitative information. It is estimated that more than half of the commercial multispectral and hyperspectral imaging applications will need to identify the shortwave infrared ( in the 1000~1700nm band) spectral data.

The illuminance emitted by atmospheric phenomena of sky radiance at night is 5 to 7 times stronger than starlight, and almost all of this light is in the short-wave infrared wavelength region.

Therefore, with a short-wave infrared camera, coupled with this kind of night illuminance, which is often referred to as night light, we can clearly "see" the target at night without moonlight, and share this image through the network, because other imaging devices cannot do this. The short-wave infrared cameras have the following applications in oceanography and meteorology.

The imaging of the visible light and near-infrared spectrum has the characteristic of "pattern integration", that is, the camera can obtain both image information and spectral characteristic information of the object at the same time.

These "quantified" map information can be used in remote sensing applications such as ocean chlorophyll, suspended matter content, and ocean coast watercolor. For example, when the chlorophyll content in seawater increases, the color of the water generally changes from blue to green.

The imager extracts remote sensing information such as seawater chlorophyll and pigment concentration, which can not only help marine experts accurately monitor the red tide phenomenon that occurs in any sea area but also Estimate the plankton biomass and primary productivity of this sea area, so as to guide fishermen to go to sea and so on.

Since shortwave infrared radiation can pass through thin clouds, it is mainly used for atmospheric correction of visible light and near-infrared detection channels.

When observing surface targets in space, they all have to pass through the thick atmosphere of the earth. In order to accurately study the target information on the surface, the influence of the atmospheric composition in the received signal must be eliminated.

Since seawater is basically a "zero" signal in the short-wave infrared spectrum, the signals received in this spectrum are all atmospheric component signals. Through a certain algorithm calculation, the atmospheric imaging signals of each detection channel in the visible light and near-infrared spectrum can be calculated. Subtracted to improve the accuracy of extracting signals from surface targets.

It can detect water temperature, sea ice, and ocean current information, and has a high detection sensitivity of water temperature changes, which is about one-fortieth of 1 degree Celsius, which is many times higher than the detection sensitivity of existing ocean remote sensors.

 

The shortwave camera can obtain the polarization information of the detected object.

Light is a transverse wave, which has a polarization direction. If a polarizer is placed in front of the polarized light, parallel to the polarization direction, the transmitted light is the strongest. And if it is perpendicular to the polarization direction, the transmitted light is the smallest, almost zero.

In daily life, there are many occasions where the characteristics of light polarization are applied. For example, the camera lens polarizer that is familiar to photography enthusiasts is used to eliminate reflections, polarizers are used in movie theaters to watch three-dimensional movies, and polarizers are used in automobiles to reduce oncoming driving at night. Dazzling lights emitted by vehicles, etc.

Since the polarization characteristics of light are uniquely sensitive to atmospheric particle characteristics (shape, size, and composition), this advantage can help researchers understand the size, shape, and optical thickness of atmospheric aerosols and cloud particles, as well as the key performance of clouds. Quantitative research on parameters is of great value to meteorological and climate forecasting.

Since shortwave infrared has the ability to penetrate haze, night vision, and low-light environment imaging, is sensitive to moisture, has high imaging resolution, and the imaging effect is close to visible light, it can be used in rainstorm warning, monitoring, tornado observation, and other occasions.

In the near-infrared, short-wave infrared, and visible light range, it can ensure the perfect day/night camera solution. It has the advantages of high resolution, no halo, and high sensitivity. The user can capture the "night light" in the atmosphere in an environment without a light source to obtain a clear and visible image.

Ordinary digital cameras cannot provide enough information to describe a scene all-weather, comprehensively, accurately, and reliably, which can easily cause target loss and misjudgment, and all imaging effects cannot be comparable to SWIR lens technology.

The SWIR camera designed and manufactured by JAVOL has excellent features such as day and night imaging, good concealment, and penetration of smoke and glass. If you want to obtain related services, you can send your needs to us, and we will give you a satisfactory answer as soon as possible.

JAVOL is an experienced manufacturer of infrared thermal imaging systems. We are equipped with a professional production team and quality inspection system to control the quality of the products in all directions. Our products are sold all over the world and used in all walks of life. We can also provide comprehensive customized services according to the needs of users. If you are interested in our shortwave infrared cameras, please contact us immediately!