Double-concave cylindrical lenses feature two concave cylindrical surfaces, providing strong beam divergence for applications such as laser beam expanders, optical testing, and precision experiments.
LUMINA offers UV, visible, and IR material options, along with complex curvature and large-size capabilities.
Material: H-K9L, N-BK7, fused silica, CaF₂, ZnSe, etc.
Diameter：0.5mm—300mm
Diameter tolerance：±0.1mm to±0.02mm
Focal length range：-5mm to -800mm(Typical)
Focal length tolerance：±1% to±0.5%
Centration：< 3 arc min to <10 arc sec
Clear aperture：>85% to >95%
Surface quality：MIL 60-40 to MIL 10-5
Surface accuracy:up toλ/10, Ra < 5 nm
Coating options: AR coatings or custom coatings upon request
Focal length refers to the powered axis only. The orthogonal axis has no optical power.
Specifications may vary depending on lens geometry, diameter, focal length, and material.
Strong beam divergence
Wide selection of optical materials
Precision and large-scale fabrication available
Scientific research
Metrology
Testing
