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| Code | 670170 | Type | Metallic Concave Mirror | |
| Optical Component Material | UVFS | Diameter | 25.4mm | |
| Diameter Tolerance | +0.0 / -0.1mm | Clear Aperture | 90% | |
| Center Thickness | 6mm | Thickness Tolerance | ±0.25mm | |
| Edge Thickness | 6.4mm | Operating Wavelength Range | 2.0μm – 20.0μm | |
| Focal Length | -100mm | Focal Length Tolerance | ±1% | |
| Coating | Mid-IR Enhanced Gold with SiO₂ protective layer | Reflectivity | Ravg > 98%, Rabs > 95% @ 0° – 45° | |
| Surface Quality (Scratch/Dig) | 40/20 | Surface Aperture (Local Radius) | 0.5 | |
| Surface Aperture (Full Radius) | 1 | Damage Threshold | 0.1J/cm² @ 1.064µm, 10ns, 10Hz, Ø1.06mm 3J/cm² @ 10.6µm, 100ns, 1Hz, Ø1.29mm |
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| Off-Axis Hole | Ø3.0mm (7.0mm from center) |
Substrate Material: Borofloat glass
Protective Layer: SiO₂ overcoat
Operating Wavelength: 250 nm – 600 nm
Applications: Beam focusing, collimation, collection, and imaging
LBTEK offers UV-enhanced aluminum coated concave mirrors, ideally suited for beam focusing, collimation, and light collection in the ultraviolet spectral range. These mirrors provide high reflectivity over a broad UV bandwidth, while reflections from the metallic surface ensure no chromatic aberrations are introduced.
Since metallic coatings are prone to oxidation and discoloration in high-humidity environments, LBTEK applies a SiO₂ protective overcoat to prevent direct contact of the aluminum layer with air. This protective layer helps maintain optical performance by reducing oxidation risks and extending durability.
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