The materials of infrared lens

Infrared lens refers to lens used to reflect, refract, and transmit infrared light. It utilizes unique physical properties to achieve the control of infrared light, therefore it is of great significance in the field of infrared optics. The commonly used materials for infrared lenses in the current market include zinc selenide, lead sulfide, zinc sulfide, copper fluoride, etc. Below is a detailed introduction to the characteristics and applications of these materials.

Zinc selenide lens: Zinc selenide is a commonly used infrared reflection film material with a reflection wavelength range of 2-14 microns. It has the advantages of high transmittance, simple preparation process, good corrosion resistance, and wear resistance. Zinc selenide film can also be used with other types of infrared lens materials to increase the effect of infrared reflection. Zinc selenide lens is used in infrared sensors, thermal imagers, and various infrared control systems.

Lead sulfide lens: Lead sulfide is a transparent infrared absorbing material. It can absorb most of the infrared radiation in the 3-11 micron infrared band and convert it into thermal energy, thus achieving applications such as preventing landscape from being exposed to infrared detectors, telescopes, and other roofless weather observation, camouflage, and cover. The most widely used lead sulfide material in the market is the production of infrared shielding glass.

Zinc sulfide lens: Zinc sulfide is a transparent infrared transparent material. It has stable transmittance in the infrared band and possesses excellent optical properties, making it one of the main materials for manufacturing infrared windows. In the infrared manufacturing process, zinc sulfide can be used by thin film deposition technology to increase its infrared reflection effect. Zinc sulfide materials are widely used in fields such as infrared sensors, optical lenses, thermal imagers, and medical devices.

Copper fluoride lens: Copper fluoride is a common infrared absorbing material. It can absorb infrared bands of 2-14 microns while reducing the transmittance in the visible spectral region. Therefore, infrared filters made of copper fluoride can be used in anti glare and thermal imaging systems to filter out visible light and infrared interference, thus achieving better infrared detection results. Copper fluoride materials can also be used in fields such as optical lenses and infrared windows.