Zinc Selenide Optics

Zinc Selenide (ZnSe) is a high-purity chemically inert optical material, boasting strong environmental adaptability and excellent machinability.

With low optical loss, uniform high transmittance across the 600 nm–16 μm band, low absorption and superior thermal shock resistance, it is widely recognized as the preferred substrate for high-power CO₂ laser optical components.

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Material	ZnSe
Tolerance	+/-0.01mm/+/-0.1mm
Flatness	λ/10~1λ
Parallelism or Centration	< 30 arc seconds
Focal Length	+/-1%
Surface Quality	40/20
Clear Aperture	>90%
Bevel	Protective bevel
Coating	According to customer's request

Applications of Zinc Selenide (ZnSe) Optical Components

Thanks to its excellent refractive index uniformity and stable batch-to-batch consistency, zinc selenide is a premium substrate for high-performance infrared optical systems. It delivers reliable performance across laser manufacturing, thermal imaging, analytical testing and aerospace sectors.

1. High-Power CO₂ Laser Optics

ZnSe is the industry-standard material for high-power CO₂ laser systems, valued for its low absorption, high thermal shock resistance and consistent transmittance across the 600 nm–16 μm band. It is the preferred choice for laser focusing lenses, output couplers, protective windows and other core laser optical components.

2. Infrared Thermal Imaging & Night Vision

With outstanding optical homogeneity and low wavefront distortion, ZnSe supports high-fidelity imaging performance. It is an ideal material for protective windows and optical elements in forward-looking infrared (FLIR) thermal imaging systems, and is also widely deployed in infrared night vision and surveillance imaging devices.

3. Medical, Industrial & Analytical Instruments

Zinc selenide components are widely used in precision measurement and analytical equipment:

Industrial thermal radiation measuring instruments

Medical diagnostic and therapeutic infrared devices

FTIR infrared spectrometers and analytical systems They are commonly fabricated into application-specific ZnSe windows and ZnSe lenses.

4. Aerospace & Specialized Optical Systems

Its reliable environmental stability and consistent infrared performance also make ZnSe suitable for high-demand specialized scenarios, including infrared detection systems for astronomical telescopes, aerospace optical payloads and precision remote sensing optics.

Custom ZnSe Optical Components

We provide fully customized zinc selenide optical components manufactured strictly to your drawings and performance requirements. Our core product range includes:

ZnSe lenses

ZnSe domes

ZnSe optical windows

Application-specific anti-reflection coatings and precision tolerance controls are available to match your exact system performance targets.

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