Fused Silica Hyper Hemispherical Dome Lens
The fused silica hyper-hemispherical dome lens is an optical fomr lens precision machined from high-purity fused silica. Coligh Optics custom-manufactures various optical domes in China.
- Hemispherical optical design
- High-purity fused silica substrate
- Integrated imaging and protective functions
- High surface figure accuracy and superior surface finish
- Customized coating options available
Fused Silica Hyper Hemispherical Optical Dome Lens Description
Made from high-purity fused silica, these hyper-hemispherical dome lenses feature a curvature extending beyond a hemisphere, enabling an ultra-wide field of view. They serve a dual purpose: acting as a protective cover while also functioning as an active optical element for imaging. Key characteristics include wide-angle capability, high-pressure resistance, and wear resistance. Coligh Optics offers custom manufacturing tailored to specific requirements, including the radius of curvature, center and edge thicknesses, and coating specifications.
Product features include:
- An optical design exceeding a hemispherical shape, achieving a field of view of over 180°—ideal for wide-angle imaging and surveillance applications.
- High-purity fused silica material offering broad-spectrum transmission and a low coefficient of thermal expansion, suitable for wavelengths ranging from ultraviolet (UV) to near-infrared (NIR).
- Dual functionality as both an optical lens and a durable window capable of withstanding pressure and abrasion.
- High-precision surface accuracy (up to λ/10) to meet the stringent demands of precision optical systems.
- A wide range of custom coating options, including—but not limited to—anti-reflective (AR) coatings, hydrophobic/oleophobic coatings, DLC protective coatings, and conductive coatings.
Fused Silica Hyper Hemispherical Optical Dome Lens Detail Display
Fused Silica AR coated Hyper-hemispherical Dome Custom Capability
| Item | Custom Capability |
| Material | Fused Silica / UV Grade Fused Silica / IR Grade Fused Silica |
| Product Structure | Hyper Hemispherical Dome Lens |
| Outer Diameter (OD) | 8–350 mm |
| Dome Height | 5–300 mm |
| Center Thickness | 2–30 mm |
| Surface Quality | 10-5, 20-10, 40-20, 60-40 |
| Surface Figure | λ/10 |
| AR Coating | Single-Point AR Coating / Broadband AR Coating / ITO Conductive Coating/ DLC coating, |
| Coating Surface | Single-Sided / Double-Sided |
| Dimensional Tolerance | ±0.05 mm |
Fused Silica Hyper-hemispherical Lens Applications
Wide-Angle Endoscopic Imaging
Pipeline and industrial endoscopes operate in confined, complex spaces, requiring ultra-wide-angle views of the surrounding pipe walls. The protective dome must also be resistant to wear, corrosion, and erosion. An ultra-hemispherical dome lens can serve as an active optical element, providing an ultra-wide field of view and minimizing blind spots.
Medical Endoscopes
Medical endoscopes—such as those used in laparoscopy, ENT procedures, and oral examinations—require ultra-wide-angle observation capabilities. Fused silica is an ideal material due to its excellent stability, scratch resistance, and resistance to biological adhesion; it also withstands thermal shock, allowing for direct high-temperature sterilization, thereby enhancing surgical safety and precision.
Underwater Wide-Angle Cameras
Underwater environments demand optical windows that are resistant to pressure, corrosion, and biofouling, while also requiring a wide field of view to cover larger areas and reduce the need for mechanical panning (which saves energy). Ultra-hemispherical lenses act as active optical components, expanding the field of view and correcting underwater distortion while maintaining structural integrity under pressure. Fused silica’s high optical transmission and low thermal expansion make it well-suited for high-pressure, deep-water applications.
