Custom Multi-Spectral CVD Zinc Selenide (ZnSe) IR Optical Dome Lens
Felix Glass multi-spectral ZnSe infrared dome lens is a hemispherical multi-band optical protective component built from high-purity CVD polycrystalline zinc selenide crystal. Unlike single-band infrared domes, ZnSe substrate delivers ultra-wide continuous transmission covering visible red light (0.5μm) to long-wave infrared (22μm), supporting simultaneous visible auxiliary alignment and full infrared spectrum detection.
Custom multi-spectral broadband anti-reflection coating is deposited on both surfaces to reduce surface reflection loss across all target bands, improve multi-spectrum light transmittance, and provide scratch-resistant protection for soft ZnSe crystal. The hemispherical dome structure provides 180° ultra-wide field of view while isolating internal optical sensors from dust, water vapor and mechanical impact in outdoor industrial environments.
Core Optical Specifications
- Base Material: CVD polycrystalline Zinc Selenide (ZnSe)
- Multi-Spectral Transmission Range: 0.5 μm – 22 μm
- Custom Coating: Broadband multi-spectrum AR coating, tunable for 3–5μm / 8–14μm / 10.6μm CO₂ laser
- Average Transmittance: >91% across customized target spectrum band
- Single-Surface Reflectance: <1.1% within working wavelength range
- Structural Form: Full hemispherical dome lens, custom inner/outer radius
- Thickness Range: 1.5mm ~ 10mm customizable
- Surface Quality: Standard 60-40 scratch-dig, upgradeable to 40-20 high precision
- Laser Damage Threshold: High resistance for continuous low-power CO₂ laser monitoring
- Field of View: 180° wide-angle multi-spectrum detection coverage
Core Product Advantages
1. Unique multi-spectral transmission property of ZnSe, compatible with visible alignment light + full infrared spectrum simultaneously, one dome satisfies dual-spectrum system demands
2. Customizable multi-band AR coating, matched to thermal imaging, CO₂ laser or multi-spectral detection wavelength requirements
3. Hemispherical 180° wide-angle design eliminates infrared detection blind zones for vehicle and industrial thermal sensors
4. Superior large-size forming capability compared with germanium (Ge) dome, supports ultra-large diameter dome customization
5. Balanced thermal stability and optical performance, works stably in -40℃ ~ +130℃ variable temperature environments
6. Fully customizable outline, radius, edge chamfer and coating spectrum to match customer multi-spectrum optical system drawings
Typical Application Scenarios
- Dual-spectrum vehicle night vision thermal imaging cameras
- Multi-band industrial infrared temperature measurement equipment
- CO₂ laser processing monitoring optical protective windows
- Security multi-spectrum perimeter thermal detection systems
- Laboratory infrared Fourier transform spectrometers
- Aerial multi-spectral infrared detection sensors
OEM Manufacturing Capability
We provide full one-stop CVD ZnSe optical processing including large crystal blank cutting, ultra-precision hemispherical polishing, multi-spectral broadband AR coating, edge chamfer finishing, strict multi-wavelength spectral transmittance testing and surface quality inspection.
Prototype sampling, small-batch trial production and mass manufacturing are supported. Each multi-spectral ZnSe dome lens is fully tested to meet customer-specified spectral, dimensional and coating requirements before delivery.
FAQ
1. What multi-spectrum performance does this ZnSe dome lens offer?
CVD ZnSe substrate transmits 0.5–22μm continuous spectrum, supporting simultaneous visible light auxiliary alignment and full infrared detection; custom multi-band AR coating further improves transmittance for target wavelengths like 8–14μm thermal imaging and 10.6μm CO₂ laser.
2. Why choose ZnSe instead of Ge for multi-spectral dome lenses?
Germanium cannot transmit visible light, while ZnSe achieves visible + infrared dual-spectrum transmission; ZnSe also has better thermal shock resistance and larger-size forming capacity for wide-field dome structures.
3. Can I customize the spectral coating and dome size?
Yes, we support custom dome radius, thickness, edge shape, and multi-band AR coating optimized for any target spectrum range to fit different multi-spectrum optical equipment.
4. What equipment is this multi-spectral ZnSe dome lens suitable for?
It matches dual-spectrum vehicle night vision cameras, industrial multi-band thermal detectors, CO₂ laser monitoring windows and laboratory multi-spectral spectrometers.
5. Do you supply sample and mass production for ZnSe multi-spectrum dome optics?
We offer prototype sampling, small trial batches and large-scale manufacturing, all ZnSe dome lenses pass full multi-wavelength spectral and surface quality inspection before shipment.
