Double-Concave Lenses
Double-concave lenses can diverge light whose focal length is negative, consisting of two concave surfaces with the same radius. These lenses are ideal for applications such as beam expansion, light projection, or focal length expansion. We offer uncoated or AR-coated double-concave lenses for your application.
Specification parameters
| Dia（mm） | 2.00 - 50.00 | CT（mm） | 1.00 - 3.00 |
| Clear Aperture | >90% | Design Wavelength | 632.8nm |
| Diameter Tolerance | +0.0/-0.1mm | Thickness Tolerance | ±0.1mm |
| Surface Accuracy | λ4@632.8nm | Focal Length Tolerance | ±1% |
| Centering Tolerance | 3 arcmin | Surface Quality | 40/20～60/40 |
| Bevel | 0.2mm x 45° | Coating | Customizable |
| Material | H-K9L /UV Fused silica/Calcium Fluoride/Zinc Selenide | ||
