Ball Lens High Precision Fiber Coupling and High Transmission
Ball Lenses are spherical optical components designed to couple light into fibers, collimate laser beams, or focus light in compact systems. Their simple yet effective geometry ensures low aberration and high transmission, making them ideal for optical communication, sensing, and miniaturized photonic devices.
Feature:
- High sphericity and surface accuracy for efficient light focusing
- Excellent transmission with low insertion loss across UV, Visible, and NIR ranges
- Compact form factor suitable for tight integration in optical assemblies
- Available in fused silica, sapphire, and other optical materials
- Custom diameters, coatings, and tolerances to meet specific design needs
Application: Fiber coupling, laser collimation, optical sensors, endoscopes, imaging systems, and photonic devices requiring compact, high-performance optics.
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1. Geometric & Optical Structure
Ball lenses are fully spherical or hemispherical components made from optically transparent materials. Their symmetric curvature allows for omnidirectional focusing or divergence of light, making them ideal for use in systems where light may enter from various angles.
2. Material & Optical Properties
Common materials include N-BK7, quartz glass, silicon, and germanium, chosen based on wavelength requirements—from UV to IR. The high transmission rate and surface precision enable excellent image quality and beam control across a broad spectral range.
3. Core Advantages
- Omnidirectional Focusing: Uniform spherical geometry enables consistent focusing from all angles, correcting aberrations in three dimensions.
- High Numerical Aperture (NA): Large acceptance angles allow for efficient light collection, especially in low-signal conditions.
- Miniaturization & Integration: Micro-ball lenses (diameter <100 µm) can be easily integrated into fiber ends, sensor tips, or chip-scale optics.
- Multi-mode Adaptability: Suitable for handling Gaussian, top-hat, and other beam profiles in diverse optical setups.
Classification
| Type | Structure | Application | Advantages |
| Full Ball Lens | 360° symmetry; uniform curvature | Fiber coupling, 3D imaging | Uniform focusing, excellent symmetry |
| Hemispherical Lens | One flat or curved base, one spherical side | Chip-level optics, fixed installations | Easy mounting, reduced reflection losses |
Application Fields
- Fiber Optic Communication: Enhances fiber-to-fiber or fiber-to-chip coupling efficiency (>90%), especially in silicon photonics.
- Laser Systems & Detection: Used in laser beam shaping, LiDAR collimation, and fluorescence signal collection.
- Medical Imaging: Enables high-resolution, wide-angle endoscopic imaging and precise optogenetic light delivery.
- Sensors: Improves sensitivity in environmental or biomedical sensors through omnidirectional light reception.
- Quantum & Scientific Research: Aids in cold atom trapping and boosts single-photon collection in quantum communication.
| Parameter | Specification |
|---|---|
| Material | BK7, K9, Fused Silica, LaSFN9, and other optical glass materials |
| Diameter Tolerance | +0 / -0.005 mm |
| Sphericity (Roundness) | < 0.003 mm |
| Surface Quality | 40/20 Scratch/Dig |
| Surface Flatness | < 2.5 λ |
| Clear Aperture | > 90% |
| Coating | Uncoated; optional coatings available upon customer request |
