What are the application scenarios of infrared lenses?

What are the application scenarios of infrared lenses corrected by special materials? Come and learn about the relevant content with the editor of Fuqing Optical Lens!

1. All-weather surveillance camera

The most minor use of infrared lenses is to complete all-weather surveillance. The optically corrected infrared lens can focus clearly during the day, and usually needs to be refocused in the morning. The infrared lens corrected by a special material can make visible light and infrared focus to the same focus, so after the focus is clear during the day, the infrared lens is turned on at night. The fill light can still image clearly.

Second, through the fog

Fog penetration originates from the monitoring requirements in long-distance and complex environments. Fog is composed of coarse particles floating in the air. The more particles per unit volume, the denser the fog. Visible light has shorter wavelengths and cannot penetrate mist, which is why visibility is very low on foggy mornings. The wavelength of near-infrared light is longer, and this feature enables infrared light to diffract huge particles and complete the purpose of fog penetration.

In the fog-through mode, the filter will filter out the visible light and only save the infrared light. With the coating anti-reflection technology, the fog-through lens can also complete long-distance all-weather monitoring under the condition of low visibility, and in the normal and fog-through modes. Keep the focal plane from shifting.

3. Laser night vision

Laser is a highly concentrated monochromatic light, so long-distance night vision monitoring can be realized by using infrared laser. The laser beam scans the object, the object reflects the beam back, and the image can be imaged after being focused by the lens. Infrared lasers are usually used, and their wavelengths are in the near-infrared wavelength range, so infrared lenses must be used to cooperate with laser equipment. The infrared lens corrected by special material can penetrate 950nm light source, and can realize ultra-long-distance night vision monitoring when used with infrared laser.