K9 Fused Silica Fully Polished Optical Glass Domes
K9 Fused Silica Fully Polished Optical Glass Domes are optical glass domes manufactured through cold processing, featuring fully polished inner and outer surfaces. Coligh custom-manufactures fully polished domes including those exceeding a hemisphere in China.
- Both inner and outer spherical surfaces are fully polished to a high-quality finish.
- K9 offers high visible light transmission, while fused silica provides broad-spectrum transmission.
- Spherical surface accuracy of λ/10 can be achieved.
- Compatible with various thin film coating systems.
- Customization available for material, curvature, coating, and surface quality.
K9 Fused Silica Fully Polished Optical Glass Domes Description
Our fully polished optical glass domes are manufactured from K9 (equivalent to BK7) or fused silica substrates. Through comprehensive optical polishing processes—covering the main surface, edges, and periphery—these products achieve excellent optical transmission, superior surface figure accuracy, and high surface quality, ensuring clear imaging across a wide field of view.
Key features include:
1. Targeted polishing capabilities: We can polish specific areas—such as edges, flange surfaces, stepped surfaces, flat bases, and chamfers—and produce transparent edges.
2. Material options: We offer K9 (equivalent to BK7), which provides high visible-light transmission, and fused silica, which covers a broader spectral range extending from ultraviolet to near-infrared.
3. High precision: We achieve surface figure accuracy of up to λ/10. This high level of polishing prevents micro-cracks, while stress-relieving edge designs enhance mechanical strength.
4. Custom coating options: In addition to fully polished finishes, we offer various custom coatings, including anti-reflective (AR) coatings, ITO conductive coatings, and DLC protective coatings.
5. Full customization: All optical domes can be tailored to specific customer requirements regarding material, dimensions, curvature, thickness, coating, and surface quality.
K9 Fused Silica Omni-Surface Polishing Optical Glass Domes
K9 Fused Silica All Surfaced Polished Optical Glass Domes Custom Capability
| Item | Manufacturing Capabilities |
| Outer Diameter | 5 mm–350 mm |
| Wall Thickness | 2 mm–30 mm |
| Shape / Profile | Standard Hemisphere, Hyper-hemisphere, Truncated Dome |
| Substrate Material | Optical-grade Silicon (Si), Zinc Selenide (ZnSe), Sapphire, Fused Silica, BK7, K9, Optical Glass |
| Fully Polished | 100% fully polished inner and outer spherical surfaces, edges, and bottom flanges, minimizes microcracks |
| Surface Quality | 10-5 / 20-10 / 40-20 / 60-40 |
| Surface Irregularity | PV < λ/10 @ 632.8 nm |
| IR Protection Coatings | DLC, High-Transmission AR, ITO |
| Edge Metallization | Gold- or silver-plated edge underlayers; supports direct welding and high-pressure hermetic sealing |
| Structural Edge Customization | Chamfered Bevels, Stepped Flanges, O-ring Grooves |
K9 Fused Silica Fully Polished Optical Glass Domes Application
High-Precision LiDAR Ranging
Ordinary polished dome surfaces have microscopic undulations and scattering centers, which cause laser beam wavefront distortion, energy dispersion, and weakened echo signals, thus reducing ranging accuracy and detection range. Fully polished surfaces minimize scattering losses, maintain the Gaussian energy distribution and collimation of the laser beam, and ensure the point cloud accuracy and repeatability of the lidar.
Astronomical Observation Equipment
Astronomical observation and star sensors require extremely low stray light and wavefront distortion. Any surface micro-roughness will produce scattering background, drowning out weak celestial signals. Fully polished domes can serve as protective windows for star sensors or space cameras, providing physical protection without introducing additional aberrations or scattering.
High-End Photography or Underwater Photography
Ordinary flat or spherical protective glass will produce ghosting, glare, and reduced contrast under strong light sources. Fully polished domes…
