Meniscus Lens can increase the NA of the system while only adding slightly to the total spherical aberrations. The Negative Meniscus Lens is used to increase the focal length of another lens while maintaining the angular resolution of the optical assembly.
Meniscus Lens
Meniscus lenses are convex-concave lenses. They have one outward curved face and one inward-curved face. If the outward curve is sharper than the inward curve, the optical lens has a positive focal length and acts as a magnifier.
Meniscus Lens has a positive or negative focal length, it forms a real or virtual image of objects.
 Positive Meniscus Lens |  Negative Meniscus Lens |
Meniscus lenses have two curved surfaces one of which is protrusive while other is intrusive, also these lenses are referred to as convex-concave lenses.
Custom glass meniscus lenses,positive meniscus lens,China meniscus lens
Meniscus Lens Specifications:
| Material: | BK7, Fused Silica, SF10, CaF2, Sapphire .etc. |
| Paraxial Focal Length Tolerance: | ±2% |
| Dimension Tolerance: | ±0.2(General). ±0.05(High Precision) |
| Center Error: | <3 arc min |
| IRR: | λ/4@633nm（General),λ/10@633nm(High Precision) |
| Clear Aperture: | >80%(Small Size), >95%(Large Size) |
| Surface Figure | <1.5λ@633nm（General),<λ/4@633nm(High Precision) |
| Surface Quality: | 60/40（General),10/5(High Precision) |
| Bevel: | <0.25mm |
| Coating: | Uncoated, AR,PR, HR, etc. |
Note: Dimension and specification are available upon requests
This economical range of meniscus lenses offers a wide breadth of powers at low cost, especially in longer focal lengths.
Meniscus Lenses & Meniscus lens manufacturer, supplier and exporter in China.
A-Star are the leading optics lens supplier for Meniscus Lenses, We has been exported to all over the world.
Meniscus Lens can increase the NA of the system while only adding slightly to the total spherical aberrations. The Negative Meniscus Lens is used to increase the focal length of another lens while maintaining the angular resolution of the optical assembly.
for doublet achromatic lens
Achromatic lenses are the simplest form of compound lens. They consist of two elements of different refractive index, which are cemented together to provide a positive focal length imaging lens. Achromatic lenses are corrected for on-axis chromatic and spherical aberration making them good for broadband collimation and focusing. These achromatic lenses are made from either crown and flint optical glasses.
They are supplied coated or with a single layer anti-reflection coating suitable for the visible (400 – 600 nm) or the near infra-red (600 – 1200 nm).
A wide range of focal lengths and diameters are available. Please ask for sizes and focal lengths required as we can supply a wide selection of these lenses.
Specification for meniscus achromatic lens
| Meniscus Achromatic Lens Technical Parameters | |
| Material | Glass,BK7, Quartz, CaF2, MgF2,sapphire crystal |
| Focal length tolerance | ±1% |
| Diameter tolerance | +0.0/-0.1mm |
| Thickness tolerance | ±0.1mm |
| Surface accuracy | λ/4 |
| Surface quality | 40-20 |
| Centration | <3arcmin |
| Clear aperture | >90% |
| Bevelling | <0.2×45° |
| Coating | AR coating |
| Al coating | |