Zinc selenide (ZnSe) spherical domes are critical optical components widely employed across advanced optical systems. They exhibit outstanding optical performance—particularly high transmission in the mid-infrared (mid-IR) spectral range—allowing light of specific wavelengths to pass through with minimal loss.
Mechanically, ZnSe domes demonstrate excellent robustness: high hardness and strength enable them to withstand significant mechanical impact and pressure without cracking or deforming.
Chemically, they offer superior stability—resisting corrosion from a broad range of aggressive agents—including moisture, acids, and alkalis—ensuring consistent performance even under harsh environmental conditions.
Moreover, ZnSe lends itself well to precision fabrication. Through advanced machining techniques, it can be shaped into spherical domes of diverse dimensions and configurations—tailored precisely to meet application-specific requirements.
| Coating | Anti-reflection (AR) coating on both surfaces |
| Diameter | 20-500mm |
| Diameter tolerance | +/-0.05mm |
| Thickness tolerance | +/-0.1mm |
| Radius-of-curvature error | ΔR/R ≈ ±0.1% |
| Surface quality | 40/20 |
| Wavefront distortion (surface figure) | λ/4 @632.8 nm PV |
| Edge chamfer | 0.2-0.5mm × 45° |
| Material | Zinc selenide (ZnSe) |
