Meniscus Lens/Concave-Convex Lens
Concave-convex lenses, also called meniscus lenses, reduce spherical aberration and produce a minimal focal spot from collimated incident light. Depending on the relative curvatures of the two surfaces, a meniscus lens can be positive or negative. Negative meniscus lenses are thinner at the center than the edge; positive meniscus lenses are thicker at the center. A Meniscus Lens is a special lens with one convex, outward-curving surface and one concave, inward-curving surface, giving a crescent shape. Positive, converging meniscus lenses have a smaller radius of curvature on the convex surface than on the concave surface, making the convex side more curved and the overall effect converging. Negative, diverging meniscus lenses have a smaller absolute radius of curvature on the concave side, making it more curved and the overall effect diverging.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Material | Optical Glass K9, Quartz, Fused Silica, BK7, Calcium Fluoride |
| Dimensions | φ5mm~400mm |
| Dimensional Tolerance | -0.02~0.1mm |
| Center Thickness Tolerance | -0.02~0.1mm |
| Radius of Curvature Tolerance | <0.001mm |
| Surface Finish | 10/5～60/40 |
| Surface Figure | λ/8～λ/2 |
| Clear Aperture | >90% |
| Edge Bevel | <0.3mm*45° |
| Coating | Antireflection-Coated |
Applications
Datasheet
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Supplier Information
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