Half-Ball Dome
Half-Ball Domes are precision hemispherical optical components designed for compact optical assemblies and protective applications. Their true hemispherical geometry provides high optical transmission, mechanical durability and thermal stability while maintaining a compact form factor.
Half-Ball Dome Overview
Half-Ball Domes are precision protective optical components manufactured from high-purity fused silica (SiO₂). The material provides excellent ultraviolet transmission, low optical absorption and stable performance across UV, visible and near-infrared wavelengths.
Available materials include sapphire, fused silica, zinc sulfide (ZnS), zinc selenide (ZnSe) and silicon, enabling designs for UV, visible, NIR, MWIR and LWIR wavelength ranges.
Chenyu Optics manufactures custom half-ball domes according to customer drawings, including customized material, diameter, dome height, surface accuracy, surface quality and AR coatings.
Key Advantages of Half-Ball Domes
Compact Imaging, Sensing & Optical Protection
Half-ball domes provide compact hemispherical protection for imaging and sensing assemblies, with material options covering UV, visible, NIR, MWIR and LWIR applications.
Typical Specifications of Half-Ball Dome
| Material | High-Purity Multi-Material (SiO₂) |
|---|---|
| Optical Function | Protective optical window / dome window |
| Dome Type | Half-Ball Dome |
| Transmission Range | UV / VIS / NIR / MWIR / LWIR, material dependent |
| Geometry | Hemispherical design |
| Dome Height | Customized |
| Diameter | Customized |
| Dome Shape | Customized |
| Surface Accuracy | λ/10 @ 633 nm |
| Surface Quality | 20-10 / 40-20 scratch-dig |
Half-Ball Geometry & Optical Principle
Why Choose Chenyu Optics for Half-Ball Domes
Chenyu Optics supports drawing-based half-ball dome manufacturing for laser, ultraviolet, sensing and aerospace optical systems, from prototype verification through repeat production.
Manufacturing Capability for Half-Ball Domes
Precision Hemispherical Polishing
Controlled half-ball dome shaping and polishing for custom curvature, wall thickness, surface accuracy and surface quality.
Optical AR Coating
UV, VIS, NIR, MWIR and LWIR coatings designed for the selected material, wavelength and incident angle.
Inspection & Packaging
Dimensional, surface and optical inspection followed by clean handling and protective packaging for precision dome components.
Coating Options for Half-Ball Domes
Uncoated Multi-Material
Suitable when the natural UV, visible and near-infrared transmission of fused silica meets the optical system requirements.
UV AR Coating
Optimized to reduce reflection and improve transmission efficiency in ultraviolet imaging, sensing and laser systems.
VIS, NIR & Custom AR Coatings
Designed for visible, near-infrared or customer-specified wavelength ranges, incident angles and environmental conditions.
Half-Ball Dome Coating Selection
| Option | Typical Range | Recommended Use | Design Note |
|---|---|---|---|
| Uncoated | Material-dependent range | Broadband systems and prototypes | Natural surface reflection remains |
| UV AR | Customer-specified UV range | UV imaging, sensing and laser systems | Specify operating wavelength and laser conditions |
| VIS AR | Visible wavelength range | Imaging and optical sensor systems | Reduces visible surface reflection |
| NIR AR | Near-infrared wavelength range | NIR imaging and detection systems | Optimized for the specified incident angle |
| Custom AR | Customer specified | Laser and multispectral systems | Specify wavelength, AOI, power and environment |
Applications of Half-Ball Domes
Infrared Imaging
Protective optical domes for high-power and precision laser assemblies.
Optical Sensors
High-transmission dome windows for ultraviolet imaging systems.
Optical Sensors
Environmental protection for sensitive optical sensor assemblies.
Aerospace Optics
Thermally stable protective windows for aerospace optical systems.
Thermal Imaging
Low-absorption optical protection for high-power laser environments.
Compact Assemblies
Precision fused silica components for laboratory optical equipment.
Industrial Protection
Durable optical protection for industrial monitoring systems.
Precision Instruments
Stable optical windows for high-accuracy imaging instruments.
Half-Ball Dome FAQ
What is a half-ball dome used for?
A half-ball dome protects sensitive optical assemblies while maintaining high transmission and stable performance in laser, UV imaging, sensing and precision optical systems.
Why is fused silica suitable for optical domes?
Fused silica offers excellent ultraviolet transmission, very low thermal expansion, low optical absorption, high laser damage resistance and outstanding optical stability.
Are half-ball domes suitable for laser applications?
Yes. Fused silica is widely used in laser systems because of its high laser damage threshold, low absorption and excellent thermal stability. The exact material grade and coating should be selected according to the laser wavelength and power.
Can half-ball domes be customized?
Yes. Chenyu Optics provides customized diameters, dome shapes, curvature, wall thickness, surface accuracy, surface quality and UV, VIS or NIR AR coating solutions.
Handling & Manufacturing Notes
Need Custom Half-Ball Domes for Compact Optical Systems?
Send us your drawing, diameter, dome geometry, wall thickness, surface requirements, operating wavelength, laser parameters, coating specification and quantity. Chenyu Optics will review your requirements and provide a suitable half-ball dome manufacturing solution.