Meniscus Lens
Meniscus Lenses have one convex and one concave surface. Greater convex curvature gives positive focal length for magnification; greater concave curvature gives a negative meniscus lens that can replace other negative lenses. Meniscus lenses minimize spherical aberration, providing smaller focal spots and fewer aberrations than plano-convex lenses for better imaging. Combined with another lens, a positive meniscus shortens focal length and increases numerical aperture (NA) without significant spherical aberration. For converging collimated light, the convex face should face the source. Dongkeda offers various sizes and focal lengths, with precision manufacturing capability for medium and large apertures exceeding 100 mm. Materials include K9 optical glass for visible and near-infrared, germanium, silicon, and calcium fluoride for infrared, and fused silica for ultraviolet. Coating options meet different applications and wavelength bands.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Diameter Error | +0.0mm/-0.1--0.02mm |
| Center-thickness error | ±0.05--0.02mm |
| Surface-figure irregularity [632.8nm] | λ/4-- λ/20@632.8nm |
| Effective-focal-length error | ±0.1% |
| Lens centering error | 1arcmin |
| Surface Finish | 20/10 – 60/40 |
Datasheet
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Supplier Information
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