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Broadband Dielectric Mirrors

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Shanghai Optics is a custom optics manufacturer with over 55 years of optics manufacturing experience. We produce high precision Broadband Dielectric Mirrors according to customer’s specifications.

These mirrors have the same exceptional specifications as our laser mirrors except that they use special multi layer 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.

Factory Standard

  • Designs for tunable and white-light applications
  • Polished to Lambda/4 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 50.4mm

Contact us for manufacturing limit or custom specifications.

Specifications & Tolerances
Surface flatness: Lambda/4 Reflectance: R>99.5% (45° incidence)
Surface quality: 20-10 Diameter: +0, -0.1mm
Thickness: 0.1mm Parallelism : <3 arcmin
Bevel: 0.2mmx45° typical Clear aperture: >90% diameter
Durability: to MIL-C-675 Material: BK7, grade A

 

Broadband Dielectric Mirrors

All measurements in nm
Part Number Wavelength Range Diameter, D Thickness, T
(nm) (Inches) (nm) (nm)
BDM-420-540-127-50-BK7 420-540 0.5 12.7 5
BDM-420-540-191-50-BK7 420-540 0.75 19.1 5
BDM-420-540-254-50-BK7 420-540 1 25.4 5
BDM-420-540-300-50-BK7 420-540 1.18 30 5
BDM-420-540-500-80-BK7 420-540 1.97 50 8
BDM-420-540-508-80-BK7 420-540 2 50.8 8
BDM-540-650-127-50-BK7 540-650 0.5 12.7 5
BDM-540-650-191-50-BK7 540-650 0.75 19.1 5
BDM-540-650-254-50-BK7 540-650 1 25.4 5
BDM-540-650-300-50-BK7 540-650 1.18 30 5
BDM-540-650-500-80-BK7 540-650 1.97 50 8
BDM-540-650-508-80-BK7 540-650 2 50.8 8
BDM-400-700-127-50-BK7 400-700 0.5 12.7 5
BDM-400-700-191-50-BK7 400-700 0.75 19.1 5
BDM-400-700-254-50-BK7 400-700 1 25.4 5
BDM-400-700-300-50-BK7 400-700 1.18 30 5
BDM-400-700-508-80-BK7 400-700 2 50.8 8
BDM-700-1000-127-50-BK7 700-1000 0.5 12.7 5
BDM-700-1000-191-50-BK7 700-1000 0.75 19.1 5
BDM-700-1000-254-50-BK7 700-1000 1 25.4 5
BDM-700-1000-508-80-BK7 700-1000 2 50.8 8
BDM-800-1200-127-50-BK7 800-1200 0.5 12.7 5
BDM-800-1200-191-50-BK7 800-1200 0.75 19.1 5
BDM-800-1200-254-50-BK7 800-1200 1 25.4 5
BDM-800-1200-508-80-BK7 800-1200 2 50.8 8
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