Proteced UV-Enhanced Aluminum Plano Mirror, 250-600nm
Borofloat™33 is a premium borosilicate glass featuring low thermal expansion and excellent thermal shock resistance, making it an ideal substrate for a wide range of optical reflective components.
Tuniu UV-enhanced aluminum mirrors feature a protective UV-transparent silicon dioxide dielectric overcoat deposited on the aluminum-coated Borofloat 33 substrate, effectively preventing metal oxidation and ensuring long-term stability. This broadband UV reflective coating delivers high durability and an average reflectivity greater than 90% across the 250–600 nm wavelength range.
Note: Due to the nature of metallic coating materials, extended exposure to open air, high humidity or corrosive chemical vapors may cause oxidation and degrade optical performance. This product is considered a consumable item. To preserve performance and service life, please observe the following handling guidelines:
- Maintain a clean and dry environment before use.
- Wear gloves during handling to avoid direct contact with the reflective surface.
- Protect the mirror from physical damage (scratches and abrasions will accelerate oxidation and coating delamination).
- When not in use, store the mirror sealed in its supplied protective case.
Tuniu offers high-precision mirrors with a variety of substrate materials. Custom solutions for non-standard dimensions and coating specifications are also available.
Parameters
| Optical material | Borofloat 33 | Working wavelength | 250-600 nm |
| Coating | UV enhanced aluminum coating (with silicon dioxide protective layer) | Reflectivity | Ravg > 90%@250-600 nm |
| Damage threshold | 2 J/cm², 10 ns pulses, 20 Hz@355 nm | Dimensional tolerance | + 0/ -0.13 mm |
| Thickness tolerance | ± 0.25 mm | Incident angle (AOI) | 0-45° |
| Chamfer | 0.25–0.76 mm face width | Chamfer tolerance | 45° ± 15° |
| Surface flatness (@ 633 nm) | λ/10 | Surface parallelism | < 3 arcmin |
| Surface smoothness (scratches/pitting) | 40/20 | ||
Model
Size: Ø12.7 x 3.1 mm, Ø25.4 x 6.0 mm, Ø50.8 x 12.7 mm