Multispectral IR Material
Zinc Sulphide (Multispectral)
Optical grade ZnS transmitting from visible to long-wave IR
Multispectral Zinc Sulphide is an advanced form of ZnS processed to provide transmission from the visible through to the long-wave infrared. It is widely used in multispectral imaging windows and domes, particularly in defence and aerospace systems where a single window material must operate across multiple wavebands.
Is this material right for your application?
Use When:
Transmission from visible through LWIR is required
Multispectral or dual-band imaging systems are used
A single window material must serve multiple sensors
Defence or aerospace imaging systems are involved
Optical performance must be maintained across wavebands
Avoid When:
Cost-sensitive applications dominate design constraints
Single-band IR performance is sufficient
Manufacturing complexity must be minimised
Consider Alternatives:
ZnSe – lower cost for mid-IR-only systems
Germanium (Ge) – compact LWIR designs
Sapphire – extreme durability where multispectral performance is unnecessary
Explore Related Optical Materials
Zinc Selenide (ZnSe)
Germanium (Ge)
Silicon (Si)
Material specifications and frequently asked questions
FAQ
Q1. What wavelength range does multispectral ZnS cover?
Multispectral ZnS is used from approximately 0.4 to 12 µm, enabling common-aperture visible and infrared systems.
Q2. Is multispectral ZnS suitable for harsh environments?
Yes. It is used for robust windows and domes where broad spectral performance and mechanical durability are both required.
Q3. Is multispectral ZnS moisture-sensitive?
No. ZnS has very low water solubility and is not treated as a hygroscopic optical crystal.
Q4. What are alternatives to multispectral ZnS?
Regular ZnS, ZnSe and Sapphire may be considered depending on spectral range and mechanical requirements.
Used in defence and aerospace
Higher cost than regular ZnS
Excellent environmental resistance