Infrared (IR) Lens Components

Infrared lenses are designed to collect, focus, or collimate light from different parts of the infrared spectrum — including near-infrared, shortwave infrared, midwave infrared, and longwave infrared. Essentially, they're optical lenses made with special materials or anti-reflective coatings to maximize performance for applications beyond 700nm, such as thermal imaging, forward-looking infrared (FLIR) systems, and spectral analysis.

The infrared spectrum covers wavelengths from 700nm all the way up to 16,000nm. To break it down further:

• Near-infrared (NIR) typically refers to 700–900nm,

• Shortwave infrared (SWIR) is 900–2300nm,

• Midwave infrared (MWIR) is 3000–5000nm,

• Longwave infrared (LWIR) is 8000–12000nm.

At Hongsheng Optics, we offer a wide range of infrared lenses, including singlet lenses, achromatic lenses, aspheric lenses, and objective lenses — all designed to deliver high performance across much of the infrared spectrum. Our infrared achromatic lenses are especially ideal for a variety of industrial, life science, and defense applications, such as Fourier Transform Infrared Spectroscopy (FTIR) and tunable Quantum Cascade Lasers (QCLs).

We also provide infrared aspheric lenses made from zinc selenide (ZnSe), using a diffraction-limited design that's perfect for focusing the output of CO₂ lasers. Other substrate materials we work with include germanium, sapphire, silicon, as well as zinc selenide and zinc sulfide.

For anti-reflective coatings, we offer options optimized for different bands: visible to near-infrared (VIS-NIR), Near-IR I (NIR I), Near-IR II (NIR II), Telecom-NIR, and Shortwave Infrared (SWIR).