T-BPD5508-G01 - Polka Dot Beamsplitter, Ø2", CaF2 Substrate
Product Drawing
These Polka Dot Beamsplitters are made from Calcium Fluoride (CaF2) and provide high transmission over the 180 nm - 8.0 µm spectral range. They can be used from 0 to 45° AOI with only negligible changes to the reflected and transmitted intensity. Light should be incident on the aluminum-coated side to maximize the reflected intensity.
| Specifications |
| Available Sizes |
Ø1" or Ø2" |
| Beamsplitting Ratio |
50% ± 5% |
Minimum Beam Diameter for 50/50 Split |
2 mm |
| Material |
CaF2
|
| Wavelength Range |
0.18 - 8.0 µm |
| Coating Pattern |
Square-Coated Apertures 0.0040" (100 µm) Sides, 0.0022" (56 µm) Spacing |
| Clear Aperture |
>90% Diameter |
| Surface Flatness |
λ/4 at 632.8 nm, Over Clear Aperture |
| Surface Quality |
60-40 Scratch-Dig |
| Thickness |
5 ± 0.3 mm (Ø1" Optics) 8.0 mm (Ø2" Optics) |
| Diameter Tolerance |
+0.0 / -0.2 mm |
| Angle of Incidence |
0 to 45° |