Paralight Optics’ optical mirrors are available for use with light in the UV, VIS, and IR spectral regions. Optical mirrors with a metallic coating have high reflectivity over the widest spectral region, whereas mirrors with a broadband dielectric coating have a narrower spectral range of operation; the average reflectivity throughout the specified region is greater than 99%. High performance hot, cold, backside polished, ultrafast (low delay mirror), flat, D-shaped, elliptical, off-axis parabolic, PCV cylindrical, PCV Spherical, right angle, crystalline, and laser line dielectric-coated optical mirrors are available for more specialized applications.
Paralight Optics offers broadband dielectric mirrors with excellent reflectance over multiple spectral ranges. For detailed information on coatings, please check the following Graph of Reflectance curve at 45° AOL for Broadband Dielectric HR Coatings optimized for the range of 350 – 400nm, 400 – 750 nm, 750 – 1100 nm, 1280 – 1600 nm for your references.
RoHS Compliant
Custom-made dimensions
Ravg > 99.5% for AOI (Angles of Incidence) from 0 to 45°
Excellent Reflectance over Specified Wide Range
Note: these mirrors are not suitable for ultrafast applications.
Substrate Material
Fused Silica or Custom-made
Type
Broadband Dielectric Mirror
Size
Custom-made
Size Tolerance
+0.00/-0.20mm
Thickness
Custom-made
Thickness Tolerance
+/-0.2 mm
Chamfer
Protective < 0.5mm x 45°
Parallelism
≤3 arcmin
Surface Quality (scratch-dig)
60-40
Surface Flatness @ 632.8 nm
< λ/10
Clear Aperture
>85% of Diameter (Round) / >90% of Dimension (Square)
Coatings
Dielectric HR coating on one surface, Ravg >99.5% for unpolarized rays, AOI 0-45deg, finely ground or inspection polished on the backside surface
These plots of the reflectance show that each sample of our four dielectric coatings for the different spectral ranges is highly reflective. Due to variations in each run, this recommended spectral range is narrower than the actual range over which the optic will be highly reflective.
For applications that would benefit from having a small portion of the beam transmitted through the optic, consider one of our backside polished mirrors. Alternatively, if you need a mirror that bridges the spectral range between two different coatings, consider a metallic mirror.