Features
- No Chromatic Aberrations Unlike with Lens-Based Systems
- >90% Average Reflectivity: 250 nm - 450 nm
- Damage Threshold: 0.3 J/cm2 at 355 nm, 10 ns, 10 Hz, Ø0.381 mm
This spherical concave mirror consists of a UV-enhanced protected aluminum coating on top of an N-BK7 substrate and is designed for use in the ultraviolet spectral range. The UV-enhanced coating is made by using an overcoat of MgF2, which offers >90% reflection from 250 to 450 nm. With λ/4 surface accuracy at 633 nm, this mirrors will provide excellent image quality. Please note that f = R/2 where R is the radius of curvature of the mirror.
Specifications
- Substrate Material: N-BK7
- Surface Irregularity: λ/4 @ 633 nm
- Clear Aperture: >90% of Diameter
- Thickness Tolerance: ±0.2 mm
- Surface Quality: 40-20 Scratch-Dig
- Diameter Tolerance: +0.0 mm / -0.2 mm
- Chamfer (Typical): 0.25 mm @ 45°
- Backside Surface: Fine Ground (Not Polished)
- Diameter: 75 mm
- Focal Length: 75 mm
- Coating: UV Enhanced Aluminum
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