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Did you know? Beyond the visible spectrum of light, there is a magical kind of light called SWIR (Short Wave Infrared). It has a wavelength range of 1.1-2.5 microns, and it is a type of electromagnetic radiation that lies between visible light and mid-infrared

What can SWIR do? You might be surprised to find out that it can let you see many things that you normally can't see. For example:

•  SWIR can penetrate through haze, smoke, water vapor and other atmospheric scattering agents, letting you see clear distant views

•  SWIR can penetrate through glass, plastic, plant leaves and other materials, letting you see hidden objects behind them

•  SWIR can identify different minerals, compounds, biological tissues and other substances, letting you see their characteristic spectra

•  SWIR can use the night sky radiance, letting you see targets in the dark

How are these functions achieved? Well, SWIR imaging uses the SWIR photons that are reflected or emitted by objects, and captures and processes them with special sensors and lenses. The most common sensor used in SWIR is InGaAs (Indium Gallium Arsenide) sensor, which can cover the typical SWIR band and extend from 550nm to 2.5 microns without the need for cryogenic cooling. The lenses need to be specially designed, optimized and anti-reflective coated for the SWIR band.

So, what are some application scenarios of SWIR imaging? The answer is: too many to count! Whether it is industrial, military, medical, agricultural, artistic, environmental and other fields, you can find SWIR imaging in action. Let's take a look at some specific examples:

•  In the semiconductor industry, SWIR imaging can be used for quality and fault detection of circuit boards, chips, solar cells and other products. For example, by using backside through silicon technique, SWIR can see through silicon wafers and observe circuit defects and failures

•  In the medical field, SWIR imaging can be used for diagnosis and treatment of ophthalmology, dermatology, surgery and more. For example, in ophthalmic examination, SWIR can see through the eye surface layer and observe the retina condition.

•  In the agricultural field, SWIR imaging can be used for irrigation planning, production inspection, meat inspection, fiber inspection and more. For example, in meat inspection, SWIR can detect foreign fibers such as hair, silk, hemp, plastic film and more that are mixed in the meat.

•  In the defense field, SWIR imaging can be used for night vision, target acquisition, search and rescue and more. For example, in night surveillance, SWIR can capture the night light in the atmosphere and achieve day-night imaging.

•  In the art field, SWIR imaging can be used for authentication and restoration of paintings and more. For example, in painting restoration, SWIR can see through the paint layers and observe the original sketches and modifications of the painter.

These are just some of the application cases of SWIR imaging. There are more possibilities waiting for you to discover. If you are interested in SWIR and want to know more information and products, please visit our website: www.sz3km.cn. We are a professional Illuminator provider with years of experience and technical accumulation. We can offer you the best quality solutions and support.

I have produced a SWIR laser illuminator with  central wavelength of 1550nm, and the main parameters of this product are as follows:

SWIR, the light that reveals a different world! Contact us now!