Positive meniscus lenses is convex-concave lens thicker at the center than at the edges, which frequently used for beam focusing applications.
Negative meniscus lenses is convex-concave lens thinner at the center than edges, which frequently used for beam expanding applications.
●Product Origin: China
●Shipping Port: Fuzhou China
●Lead Time: 4 working weeks
●Payment: T/T Payment, Western Union
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1. What is Meniscus Lens?
Meniscus lenses have two curved surfaces,convex on one side and concave on the other side. It is thicker at the center
than at the edges. When a meniscus lens is combined with another lens, the focal length is shortened and the numerical
aperture of the system is increased.
2. What's the advantages of using Meniscus Lenses?
It produce a smaller focal point and fewer aberrations than a standard plano-convex lens and enhance image quality.
3. What's the applications of Meniscus Lens?
Negative meniscus lenses are often used for Infrared Application. These lenses are used as an alternative to other
negative lenses with a greater curvature on the concave side and a smaller curvature on the convex side.
Specification
Material:Optical glass, BK7, Fused Silica, CaF2,Germanium etc.
Bevel:<0.25mm X 45°
Standard | High Precision | |
Diameter Tolerance | +0/-0.1mm | +0/-0.05mm |
Focal Tolerance | ±0.1 | ±0.02 |
Surface Quality | 60-40 | 20-10 |
Clear Aperture | >85% | >95% |
Surface Flatness | N=5, △N=0.5 | N=3 △N=0.3 |
Centration | 3 min | 30 arcset |
Coating: | Single layer MgF2; Multiple layers BBAR coating. |