A meniscus lens is an optical element featuring one convex and one concave surface, with closely matched radii of curvature—giving it a distinctive crescent-like profile. Depending on its surface curvatures and material refractive index, it exhibits either positive or negative optical power. Rather than serving solely as a simple focusing or diverging element, the meniscus lens excels in aberration correction and beam shaping within optical systems.
Manufactured from high-grade optical glasses—including N-BK7, SF-series glasses—and precision-processed, our meniscus lenses are available in a broad range of specifications covering the ultraviolet through infrared spectral regions. They serve as essential components in high-performance imaging systems, laser resonators, and sophisticated optical path designs.
| Parameter | Standard Specification | Precision Specification | Ultra-Precision Specification |
| Diameter Range | 5-100mm | 3-150mm | 2-120mm |
| Focal Length Range | ±10mm to ±1000mm | ±5mm to ±1500mm | ±3mm to ±2000mm |
| Diameter Tolerance | +0.0/-0.1mm | ±0.05mm | ±0.02mm |
| Center Thickness | ±0.1mm | ±0.05mm | ±0.02mm |
| Radius of Curvature Tolerance | ±0.5% | ±0.2% | ±0.1% |
| Dual-Surface Radius Matching | <2 fringes | <1 fringe | <0.5 fringe |
| Surface Accuracy | λ/4 @ 632.8nm | λ/10 | λ/20 |
| Decenter Error | <3 arc minutes | <1.5 arc minutes | <0.5 arc minutes |
| Surface Quality | 40-20 scratch-dig | 20-10 | 10-5 |
| Edge Thickness Variation | <0.2mm | <0.1mm | <0.05mm |
| Clear Aperture | >90% of diameter | >95% of diameter | >98% of diameter |
