Broadband Dielectric Mirrors
Broadband Dielectric Mirrors
Broadband Dielectric Mirrors are designed to provide high reflectivity over a wide wavelength range through the use of multilayer dielectric thin-film coatings. Rather than relying on metallic reflection, these mirrors use optical interference effects to achieve efficient, low-loss reflection across broad spectral bands. As a result, broadband dielectric mirrors are commonly used in optical path folding, beam steering, imaging systems, and laser-based instruments where stable spectral performance is required.
Typical applications include:
Optical path folding and beam steering
Imaging and projection systems
Laser-based instrumentation and photonics platforms
Wavelength Range and Optical Performance
Broadband dielectric mirrors are typically specified according to their operating wavelength range and angle of incidence. Common designs cover portions of the visible spectrum, the near-infrared (NIR), or extended broadband regions depending on system requirements. Average reflectivity across the designed bandwidth is commonly greater than 99%, and for certain wavelength ranges and incident angles, even higher performance can be achieved through optimized coating design.
Key optical parameters are commonly defined by:
Operating wavelength range (visible, NIR, or extended broadband)
Angle of incidence (normal incidence or up to 45°)
Average reflectivity across the specified bandwidth
| Parameter | Specification |
|---|---|
| Structure | Flat, Spherical, Cylindrical, or Customized Shape |
| Substrate | Fused Silica / Silica / BK7 Glass |
| Dimension | 2 mm – 100 mm |
| Clear Aperture | > 90% of Dimension |
| Surface Quality | 40/20, 20/10 |
| Surface Irregularity | λ/2 – λ/10 @ 632.8 nm |
| Thickness | 1 mm – 20 mm |
| Coating | UV / VIS Broadband Dielectric Coating |
Custom Manufacturing and Technical Support
When you require a custom broadband dielectric mirror, it is important to work with optical designers and manufacturers who understand both coating design and precision fabrication. We work closely with customers to develop broadband dielectric mirrors that meet exact optical and mechanical specifications, and each component is carefully fabricated and tested to ensure consistent performance. Contact us to discuss your application or to request a custom quotation.
