Home / Custom / Optical Components / Cylindrical Mirror / Meniscus Cylindrical Lens 
Meniscus Cylindrical 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. This lens shape is best used when one conjugate is relatively far from the lens.
Optical glass such as K9, fused silica, sapphire, MgF2, silicon (Si), ZnSe, ZnS, etc. These materials possess high transmittance, low absorption, low scattering, uniform refractive index, and specific dispersion characteristics.
Precisely hemispherical. The machining precision of the center and radius of curvature of the sphere is extremely high.
The surface is precision polished to an optical grade of 10-5 to ensure image quality and reduce scattering and aberrations.
An AR coating is typically applied to the concave surface to maximize the transmittance of specific wavelengths of light (e.g. visible light) and reduce reflection loss.
| Commercial | High precision | |
|---|---|---|
| Material | Optical glasses, fused silica, silica, etc. | |
| Diameter | 0.5mm ~ 150mm | |
| Diameter tolerance | ±0.1mm | ±0.02 |
| Focal length | -50mm ~ 2000mm | |
| Focal length tolerance | ±2% (<10mm) | |
| ±0.5% <10mm – 1000mm) | ||
| ±1% (>1000%) | ||
| Centraticom | <3 arc min | <10 arc sec |
| Clear aperture | >85% ~92% of diameter | |
| Surface quality ( Scratch / Dig) | MIL 60/40 | MIL 10/5 |
| Surface accuracy | λ/4@632.8nm | λ/10632.8nm |
| Bevel | 0.05mm~0.2mm x 45° | |
| Coating | Up on customer’s requirement. | |
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