[Features]· Mirror with high reflectance that broadly covers the ultraviolet or infrared ranges in addition to the visible range.· It can be used for spectroscopic experiments including invisible light and propagation of black body radiation spectrum.· Higher reflectance than metal film mirrors can be obtained even in ultraviolet and infrared areas.· As a dielectric multilayer mirror, its mirror surface is not easily scratched and can be cleaned.· Because the film is not absorbent, it does not change over time and can withstand continuous laser irradiation.· A surface accuracy guaranteed mirror (HTFM) that guarantees its surface accuracy after coating is also available.· * Reflection wavelength characteristics may vary depending on the polarization state of incident beams for dielectric multi-layer film.· * P polarization has lower reflectance and a narrower reflection band than S polarization.· * Reflectance for the specification shows average reflectance values of P polarization and S polarization.· * Mirror surface has metallic gloss, but does not use metal.· * Be careful to avoid confusion with metal film mirrors.[Product Specifications]· [ Common Specifications]· Material: BK7· Coating: Dielectric Multilayer Film· Incidence Angle: 45° ±3°· Substrate Surface Accuracy: λ/10· Parallelism: < 3'· Scratch-Dig: 40-20· Effective Diameter: 90% of External Diameter· Rear Surface: Polished Surface· [Individual Specifications]· Compatible Wavelength: 400 to 2,000 nm· Outer diameter φD: φ50 mm· Thickness t: 8 mm· Reflectivity: > 98% on Average· Laser Yield Strength*: 0.5 J/cm2· * Laser Pulse Width 10 ns, Wavelength 532 nm, Repetition Frequency 20 Hz