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Plano-concave lenses can diverge a collimated beam from a virtual focal point and are commonly used in Galilean beam expanders. Plano-concave lenses have negative focal length and negative spherical aberration, which can be used to compensate for aberrations in other lenses within the system.
Our plano-concave lenses are available in a variety of substrates, including UV fused silica (UVFS), N-BK7, N-SF11, calcium fluoride (CaF2), barium fluoride (BaF2), silicon (Si), zinc selenide (ZnSe), magnesium fluoride (MgF2), germanium (Ge)…
Available in uncoated or AR-coated versions
Plano-concave Lenses Technical Parameters
| Substrate Material | H-K9L, Quartz, Calcium fluoride | Diameter | 5-800mm |
|---|---|---|---|
| Diameter Tolerance | +0.0/-0.1 mm | Thickness Tolerance | ±0.1 mm |
| Focal Length Tolerance | ±1% | Clear Aperture | >90% |
| Design Wavelength | 587.6 nm | Refractive Index | 1.5168 |
| Surface Quality | 60/40-20/10 | Surface Accuracy | λ/4- λ//8 |
| Lens Centering Error | <3' | Coated | Uncoated, VIS, NIR, SWIR |
H-K9L Plano Concave Lenses Transmittance Curve
Quartz Plano Concave Lenses Transmittance Curve
Calcium Fluoride Plano Concave Lenses Transmittance Curve
