IR Thermal Imaging Materials
To support these growing markets, Vital Materials provides a comprehensive range of infrared-transparent materials engineered for stable, uniform optical performance in the 2–14 μm range. Our materials are offered as machined blanks, windows, lens substrates, and pre-generated shapes to streamline customer production and reduce finishing time.
Materials for Thermal Imaging Systems
Vital offers a critical selection of imaging-grade Infrared (IR) materials essential for high-performance thermal imaging systems. These materials are chosen for their specific optical properties in the IR spectrum and include Germanium (Ge), Zinc Selenide (ZnSe), Zinc Sulfide (ZnS & Multispectral ZnS), Silicon (Si), and Chalcogenide Glass. Each of these materials is provided in a variety of thicknesses, diameters, and blank formats, allowing them to be customized to meet precise customer specifications for system design, prototyping, and scaled production.
Germanium (Ge)
Germanium is the most widely used infrared optical material for 2–14 μm thermal imaging. It offers a high refractive index, excellent transmission in the IR band, and complete opacity in the visible range. These characteristics make it ideal for imaging windows, lenses, prisms, and protective elements.
Key Characteristics
- High IR transmission (2–14 μm)
- Opaque in the visible spectrum for stray-light control
- Stable mechanical and thermal performance
- Available in monocrystalline and polycrystalline forms
Zinc Selenide (ZnSe)
ZnSe provides excellent transmission from the visible spectrum through the long-wave infrared, making it suitable for both imaging and system alignment. Its uniform refractive index and low absorption at 10.6 μm support precision optical performance across a wide range of camera designs.
Key Characteristics
- Wide transmission range from visible to LWIR
- Excellent homogeneity and forming properties
- Suitable for protective windows and optical elements
Zinc Sulfide (ZnS & MS-ZnS)
Vital Materials offers both standard IR-grade ZnS and hot-isostatically-pressed multispectral ZnS (MS-ZnS). MS-ZnS provides improved clarity from visible wavelengths through 12 μm, along with increased mechanical strength for outdoor or rugged imaging environments.
Key Characteristics
- IR-grade ZnS optimized for 8–12 μm systems
- MS-ZnS offering high strength and multispectral transmission
- Suitable for windows, domes, and protective covers
Silicon (Si)
CZ-grown silicon is commonly used as a lightweight window material for 1.5–8 μm imaging systems. Its high thermal conductivity also makes it suitable for optical elements in systems requiring rapid heat dissipation.
Key Characteristics
- Broad IR transmission from 1.5–8 μm
- High thermal conductivity
- Widely used in detector protection, reflectors, and system windows
Chalcogenide Glass
Chalcogenide glass provides an excellent cost-effective alternative to germanium for many commercial IR imaging applications. It is valued for its stable refractive index, good dispersion characteristics, and compatibility with high-precision molding methods for volume production.
Key Characteristics
- Excellent uniformity and stability
- Suitable for mass-manufactured molded optics
- Common material families include Ge-As-Se, Ge-Sb-Se, As₂Se₃, and As₂S₃
Manufacturing & Processing Capabilities
Vital Materials supplies IR thermal imaging materials in multiple configurations:
- Flat plates and rectangular blanks
- Round “puck” blanks for lens generation
- Pre-shaped / pre-generated lens substrates
- Polished windows
- Custom thickness and diameter tolerances
- Optional DLC and BBAR coatings (window surfaces, IR-optimized coatings)
These options help reduce machining time, minimize material loss, and accelerate customer production cycles.
Quality & Reliability
All materials are produced and processed under ISO 9001 and ISO 14001 certified systems. Each batch undergoes dimensional, optical, and chemical checks to ensure consistency and traceability. Certificates of Analysis (COA) are available on request.