Infrared Optics

MOK Optics Co LTD specializes in precision optical components fabrication within the photonics industry. With advanced design, manufacturing, and assembly technologies, as well as highly efficient production facilities, we have the capability to meet a wide range of customer demands, from simple to complex, from prototype work to volume production runs.

Our expertise lies in manufacturing custom optics, including lenses, prisms, mirrors, windows, filters, and more. These optical components find extensive applications in laser systems, medical equipment, biotechnology, aerospace technology, security systems, and various other industries.

We offer an extensive range of infrared (IR) substrates, such as Ge, Si, ZnSe, ZnS, CaF2, BaF2, GaAs, and Chalcogenide, along with multiple anti-reflection coating options to enhance durability and optimize performance.

Applications of Infrared Optics

Infrared optics have diverse applications across various fields, including high-power CO2 lasers operating at 10.6 μm, night-vision thermal imaging cameras in the MWIR and LWIR bands, IR imaging, and spectroscopy for identifying trace gases in the mid-infrared region. We specialize in producing laser line optics and infrared components that exhibit exceptional performance across a wide wavelength range. Our experienced team provides comprehensive design support and consultation services to ensure optimal solutions for your specific applications.

Selecting Infrared Optics for Your Needs

The infrared spectrum spans from approximately 0.750 to 1000 μm (750 – 1000000 nm) and is categorized into the near infrared (NIR), mid-wave infrared (MWIR), and far infrared (FIR) regions based on wavelength ranges. Choosing the right substrate and anti-reflection coating depends on the prime transmittance required for your application.

Considerations for selecting infrared optics include thermal properties, index of refraction, dispersion, and Abbe number. Thermal properties, such as index gradient and coefficient of thermal expansion (CTE), determine the substrate’s performance under varying temperatures and thermal stability in high-heat environments. The index of refraction varies significantly among IR materials, offering flexibility in system design based on optical requirements.

Dispersion, measured by the Abbe number, indicates the material’s chromatic aberration and its suitability for specific wavelength ranges. Crown materials with Abbe numbers greater than 55 exhibit lower dispersion, while flint materials with Abbe numbers lower than 55 are more dispersive. These factors are crucial in optimizing the performance of IR optics for your applications.