Home / Custom / Optical Components / Optical Spherical Lens / Meniscus Lens 
Meniscus lens lens has one concave side and one convex side, shaped like a crescent moon. A key characteristic is that the two optical surfaces bend in the same direction. ECOPTIK provides meniscus lens in both positive and negative focal lengths.Its core value lies not in individual imaging, but in effectively reducing spherical aberration and coma of the entire system, thereby improving the clarity and fidelity of the image.
| Items | Parameters |
|---|---|
| Material | Optical glass/ Fused silica/ sapphire etc. |
| Diameter | 2mm~300mm |
| Diameter Tolerance | ±0.05mm(≤50mm) |
| ±0.1mm(＞50mm) | |
| Focal Length | -50mm~-2000mm |
| Focal Length Tolerance | ±0.2%（＜10mm） |
| ±0.5%（＜10mm-1000mm） | |
| ±1%（＞1000mm） | |
| Center Thickness | 2mm~20mm |
| Surface Auality | 60/40， 40/20， 20/10 |
| Surface Accuracy | λ/2~λ/10@632.8nm，532nm |
| Clear Aperture | >85% dig diameter |
| Center Deviation | <3arc min~ 30arc sec |
| Coating | According to customer requirements. |
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