Description
Factory custom Optical glass dome lens sphere cover glass dome cover optical lens hemisphere cover
Specifications
-
Dome Type:— Hemispherical Dome Cover (half-sphere, open base — most common for camera/sensor protection)— Concentric / Aplanatic Dome (inner & outer surfaces share same center — zero net optical power for on-axis rays)— Partial Sphere / Segmented Dome (custom included angle, e.g. 90° or 120°)— Flanged Dome (with integral mounting lip or threaded collar per drawing)
-
Material Options:— VIS / NIR: N-BK7 (K9), UV Fused Silica (JGS1), Sapphire (Al₂O₃)— UV: CaF₂, MgF₂, Fused Silica— MWIR / LWIR: Si, Ge, ZnS (Cleartran), ZnSe, Chalcogenide Glass— Broadband: Sapphire (0.15–5 µm), CaF₂ (0.13–10 µm)
-
Outer Diameter (OD): 3 mm – 300 mm (common: Ø12.7 / Ø25.4 / Ø50.8 / Ø75 / Ø100 / Ø150 mm)
-
Wall Thickness (t): 0.5 mm – 20 mm (typical 1.0 / 2.0 / 3.0 / 5.0 mm)
-
Dome Height / Sag: Per hemisphere (H = Ro) or custom partial dome angle
-
Diameter / Thickness Tolerance: ±0.05 mm (precision); +0.0 / −0.1 mm (standard)
-
Surface Quality: 60-40 / 40-20 / 20-10 Scratch-Dig
-
Surface Irregularity (Spherical Surface): λ/4 or λ/10 @ 632.8 nm
-
Centration (Concentricity of inner/outer surfaces): ≤ 0.02 mm (aplanatic)
-
Coating Options:— VIS: BBAR 400–700 nm (Ravg < 0.5%)— NIR: BBAR 700–1100 nm or 400–1100 nm (broadband)— IR: BBAR @ 3–5 µm / 8–12 µm / dual-band— DLC (Diamond-Like Carbon): Protective overcoat for IR domes (rain erosion resistant)— Hydrophobic / Oleophobic: Easy-clean top coat for outdoor use
-
Edge / Flange: Ground edge; integral mounting flange per customer drawing (threaded / bolt pattern / bonded)
