Biconvex Lens
Double Convex Lenses have two convex spherical surfaces of equal radius and positive focal length, focusing light to a point. They minimize aberrations when object and image distances are equal or similar and suit 1:1 imaging. For conjugate ratios, object distance to image distance, from 5:1 to 1:5, biconvex lenses are a good choice for reducing aberration; outside this range, plano-convex lenses are usually preferred. 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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