N-BK7 metal-coated mirror
Specification Snapshot
Parallelism
3 '
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Specifications
| Parameter | Value |
|---|---|
| Average Reflectance [UV-enhanced aluminum coating; 250~400nm] | >85% |
| Average Reflectance [Protected aluminum coating; 400~800nm] | >87% |
| Average Reflectance [Protected silver coating; 400nm~20um] | >400% |
| Average Reflectance [Protected gold coating; 650nm~16um] | >98% |
| Substrate Material | N-BK7, fused silica, heat-resistant glass, float glass |
| Dimensional Tolerance | ±0.1 mm |
| Surface Quality | 60-40 |
| Parallelism | 3 ' |
| Flatness [Per 25mm; 633nm] | λ/4 |
| Chamfer | Protective |
| Surface Treatment [One surface] | Polishing and metal coating |
| Surface Treatment [The other surface] | Fine-ground |
Key Features
Broad spectral range; low sensitivity to incidence angle and polarization; low cost; non-durable; relatively low reflectance; low laser-damage threshold. Aluminum is the most widely used metallic reflective coating, offering high reflectance from near-ultraviolet to near-infrared at low cost. Silver reflects more strongly than aluminum in visible and near-infrared bands, but the source states that it oxidizes rapidly in air and darkens, quickly degrading coating performance and hardness. Gold coatings offer good consistency and high reflectance in near-, mid-, and far-infrared bands, effectively controlling thermal radiation, but are soft, easily scratched, expensive, and require particular care during cleaning.
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Supplier Information
Fujian Youenli is your go-to expert in custom optical lenses. We are a national high-tech enterprise integrating opto-mechanical design, manufacturing, marketing, and ongoing customer service. We have accumulated extensive experience in R&D, technical support, and manufacturing. We not only provide customers with high-quality standard C-mount lenses, line scan lenses, short-wave infrared (SWIR) lenses, telecentric lenses, and more, but are also especially skilled at providing customized one-stop OEM and ODM optical solutions to help customers become more differentiated and competitive in the market. Our lenses are widely used in emerging high-tech industries such as industrial inspection, factory automation, semiconductors, biomedical, autonomous driving, and new energy manufacturing.
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