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Meniscus Lenses
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Meniscus lenses, also named convex-concave lenses, feature one convex curved surface and one concave surface, split into positive meniscus lens and negative meniscus lens based on curvature difference. Thanks to its unique crescent geometry, this optical component effectively minimizes spherical aberration when assembled into multi-lens systems, optimizes numerical aperture (NA), and delivers stable beam focusing or beam expanding performance unavailable from regular singlet spherical lenses.
Parameters
Specification
Material
Optical Glasses, Fused Silica, Sapphire, Infrared Material, etc.
Diameter Range
0.5 ~ 600mm
Diameter Tolerance +0.00/-0.02mm Surface Irregularity λ/10@632.8nm Surface Quality 10-5 Focal Length Tolerance ±0.5% Centration 30 arc sec. Clear Aperture > 90% of diameter Bevel 0.2mm × 45° Coating As customer's request Two Primary Categories of Meniscus Lenses: Positive & Negative Designs
Meniscus optics are split into two core classifications based on differing curvature radii: positive meniscus lenses and negative meniscus lenses, each engineered for distinct beam manipulation tasks in precision optical setups.- Positive Meniscus Lenses
For positive meniscus variants, the convex surface features a smaller curvature radius while the concave side comes with a larger radius. Structurally, the lens rim is thicker than its central portion. When paired with other optical elements, positive meniscus lenses shorten the overall system focal length without sacrificing angular resolution. Thanks to this unique property, they are widely adopted to compress beam size and achieve compact, sharp focal spots in focusing assemblies. - Negative Meniscus Lenses
In contrast, negative meniscus lenses possess a shorter curvature radius on the concave surface and a longer radius on the convex side, resulting in thicker central thickness relative to peripheral edges. This design works excellently as an alternative to conventional negative lenses, especially when manufactured from high-refractive-index infrared substrates. These components are preferred for beam-expanding projects where low spherical aberration is a critical requirement.
JT Processing Capability
JT manufactures custom meniscus lenses per customer’s technical drawings and specifications. Available substrate materials include N-BK7(H-K9L), fused silica, CaF₂, ZnSe, sapphire and other optical glasses. We provide customized anti-reflection AR coatings covering VIS, NIR and SWIR spectrum to raise transmittance above 95% and cut surface reflection loss.
With 19 years of precision optical lens production experience, our professional engineering team supplies full-set technical service: optical design assistance, lens structure optimization, manufacturability evaluation and finished lens optical performance testing, supporting OEM & ODM bespoke lens development for global optical system integrators.
- Positive Meniscus Lenses
Meniscus Lenses
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