Infrared cameras can capture target objects in dark environments, and have important applications in military applications. However, American researchers have developed a new material that will enable the human body and tanks to achieve 'stealth' for infrared cameras.
Infrared light is an electromagnetic wave with a wavelength between microwave and visible light. The human body and the tank engine can generate infrared light. Even in the night or dense fog, it can be detected by infrared cameras and other detection devices. Therefore, infrared stealth technology has become increasingly popular in recent years. Received attention.
A team published by the team of Professor Jiang Hongrui of the University of Wisconsin-Madison in the latest academic journal "Advanced Engineering Materials" said that they have developed a new material with a thickness of less than 1 mm, which can absorb 94% of infrared light. After covering this new material, it is difficult to find by infrared cameras.
This material uses black silicon commonly used in solar panels. The black silicon surface has a large number of tiny needle-like structures that stand like trees in the forest and are called 'nanowires'. After the light hits its surface, it will be in 'nano The line 'reflects back and forth, it is difficult to escape, this material is difficult to find. The researchers used tiny silver particles to etch the silicon surface, making the 'nanowire' more slender, thus enhancing the material's ability to absorb infrared light. .
Researchers say that in addition to using this material to help the target object 'invisible' to the infrared camera, the heating element can be placed in the material to emit a false thermal signal to confuse the infrared camera. For example, let the tank look Like the ordinary guardrail on the road.
