* High-quality spherical double-concave lens for DUV wavelengths
* Ideal for 248 nm KrF excimer laser wavelength
* Shape: Circular, Diameter: 68 mm
* Focal Length: -220.8 mm
* Radii of Curvature: 213 mm and 68 mm
* Center Thickness: 15 mm
* Surface finish: 20-10 laser quality
* Both surfaces anti-reflection coated for 248 nm
* Material: Calcium Fluoride
* Condition: Brand new