Thermal Imaging Optical Windows
Custom Made

Global Optics supplies custom optical windows for thermal imaging systems, manufactured exactly to customer drawings and specifications.
We support everything from one-off prototypes to production supply, with no minimum order quantity and full UK inspection prior to dispatch.
Thermal imaging systems require materials that transmit infrared wavelengths, as standard optical glass is not suitable.
Typical response time: within 24–48 hours depending on specification.
All components are inspected in the UK prior to dispatch to ensure they meet specification.
What We Need to Provide a Quotation
Providing the following information allows us to quote accurately and avoid delays:
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Material (if known)
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Diameter / size
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Thickness
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Quantity
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Drawing or specification
Materials for Thermal Imaging Windows
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CaF₂ (Calcium Fluoride) – wide transmission including IR
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ZnSe (Zinc Selenide) – excellent for thermal imaging
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ZnS (Zinc Sulphide) – durable IR applications
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Silicon – robust and cost-effective for IR systems
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Germanium – high-performance IR optics (longer lead times / restrictions)
When to Use Thermal Imaging Optical Windows
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Infrared camera systems
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Thermal sensing and monitoring
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Industrial inspection systems
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Scientific and analytical equipment
Choosing the Right Material for Thermal Imaging
The correct material depends on:
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Wavelength range of the system
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Environmental conditions
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Mechanical strength requirements
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Cost and availability
If unsure, send your specification and we will quote based on your application.
When Not to Use Thermal Imaging Windows
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Visible light-only applications (BK7 or fused silica more suitable)
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High impact or abrasive environments (sapphire more suitable)
Applications
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Thermal imaging cameras
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Industrial inspection
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Monitoring systems
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Scientific instrumentation
Custom Made to Drawing
All thermal imaging optical windows are manufactured to customer specifications, including size, thickness, surface quality and tolerances.
We supply components strictly to drawing and support both prototype and production quantities.
Coatings Available
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Anti-reflective coatings for IR wavelengths
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Custom coating options