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Broadband Mirrors

Broadband Mirrors

  • Designs for tunable and white-light applications
  • Polished to λ/10 minimizing subsurface structure
  • ≤ 3 arcmin parallelism
  • 30-100 dielectric layer designs for high reflectance
  • Designed for 45 degree angle of incidence
  • Standard diameters from 12.7 to 50.8mm

 

These mirrors have the same exceptional specifications as our laser mirrors except that they use special multilayer coatings to achieve a very high degree of reflectance for both s- and p-polarizations over a broad wavelength range. For white light or tunable laser use these mirrors provide the ultimate in high reflectance and insignificant polarization effect. 

 

The reflectance of these coatings is consistently greater than 99.5% average. However, this figure includes very small dips in the p-reflectance which can never be completely eliminated. The s-polarization component has a reflectance greater than 99.9% over the entire range. 

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Diameter (mm)tc (mm)MaterialWavelength Range (nm)Reflectance (%)Angle of Incidence (deg )FlatnessSurface QualityRear SurfaceParallelism toleranceClear Aperture (%)Diameter toleranceThickness toleranceBevelAngle of Incidence (°)
12.75.0BK7420-480≥99.5-λ/1020 - 10Polished≤ 3arcmin≥ 90%+0, -0.1mm±0.1mm0.2mm x 45° typical45
19.15.0BK7420-480≥99.5-λ/1020 - 10Polished≤ 3arcmin≥ 90%+0, -0.1mm±0.1mm0.2mm x 45° typical45
25.45.0BK7420-480≥99.5-λ/1020 - 10Polished≤ 3arcmin≥ 90%+0, -0.1mm±0.1mm0.2mm x 45° typical45
30.05.0BK7420-480≥99.5-λ/1020 - 10Polished≤ 3arcmin≥ 90%+0, -0.1mm±0.1mm0.2mm x 45° typical45
50.08.0BK7420-480≥99.5-λ/1020 - 10Polished≤ 3arcmin≥ 90%+0, -0.1mm±0.1mm0.2mm x 45° typical45
50.88.0BK7420-480≥99.5-λ/1020 - 10Polished≤ 3arcmin≥ 90%+0, -0.1mm±0.1mm0.2mm x 45° typical45
12.75.0BK7480-540≥99.5-λ/1020 - 10Polished≤ 3arcmin≥ 90%+0, -0.1mm±0.1mm0.2mm x 45° typical45
15.05.0BK7480-540≥99.5-λ/1020 - 10Ground≤ 3arcmin≥ 90%+0, -0.1mm±0.1mm0.2mm x 45° typical45
19.15.0BK7480-540≥99.5-λ/1020 - 10Polished≤ 3arcmin≥ 90%+0, -0.1mm±0.1mm0.2mm x 45° typical45
20.05.0BK7480-540≥99.5-λ/1020 - 10Ground≤ 3arcmin≥ 90%+0, -0.1mm±0.1mm0.2mm x 45° typical45

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