Meniscus Lens with Outer Diameter 8.45mm
A meniscus lens is an asymmetric element with two spherical surfaces curving in the same direction. Positive/negative versions correct aberrations and optimize compact paths; the source states they cannot act alone as imaging lenses and must combine with plano-convex, plano-concave or cemented lenses. Positive types are thicker centrally, with weak positive power to correct spherical aberration, coma and field curvature without markedly changing divergence, improving clarity/edge images in industrial inspection lenses and laser collimators. Negative types are thicker at the edge, with weak negative power for beam expansion, longer effective paths and distortion/astigmatism suppression in laser expanders, endoscope relays and3D-scanning optics. A 8.45mm diameter is a medium-sized precision size with greatly improved clamping stability and throughput. CA is generally ≥7.61mm, stated as over90% of diameter. A standard chamfer <0.2mm×45° prevents chipping/scratching during clamping, cleaning and assembly. It suits laser-ranging modules, medical endoscopes, industrial machine vision, consumer3D scanning and portable spectrometers requiring compactness and imaging accuracy.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Lens Types | Meniscus Lens |
| Diameter Range | 1.5mm-50mm |
| Outer Diameter Tolerance | +0/-0.01mm |
| Thickness Tolerance (Thickness Deviation) | ±0.01mm |
| Surface Finish | 10/5~80/50 |
| Eccentricity Error | 1'~5’ |
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