The 07D20ER.2 Broadband Metallic Mirror is an excellent general purpose, broadband reflectors. This 3/4 inch (19.05 mm) diameter mirror is made from a 4.57 mm thick Borofloat® 33 substrate. Borofloat has low thermal expansion and is an excellent substrate for most applications. The ER.2 protected silver coating is composed of a low emissivity silver film fully encapsulated by a multilayer dielectric stack to prevent oxidation. This coating has excellent broadband reflectivity in the IR, while maintaining very good performance in the visible and near IR. Average reflectivity is greater than 96% from 480–1100 nm and greater than 98.5% from 1.1–20 µm. This mirror has a λ/10 surface flatness and a 15-5 surface quality.
| Model | 07D20ER.2 |
|---|---|
| Mirror Shape | Round |
| Wavelength Range | 480 to 20000 nm |
| Diameter | 0.75 in. (19.1 mm) |
| Thickness | 0.18 in. (4.57 mm) |
| Material | Borofloat 33 or equivalent |
| Coating Type | Protected Silver |
| Surface Quality | 15-5 scratch-dig |
| Coating Code | ER.2 |
| Clear Aperture | ≥central 80% of diameter |
| Reflectivity | Ravg>96%, Rmin>93% @ 480-1100 nm; Ravg>98.5%, Rmin>97% @ 1.1-20 µm |
| Angle of Incidence | 0-15° |
| Surface Flatness | λ/10 at 632.8 nm over the clear aperture |
| Chamfers | 0.25–0.76 mm face width |
| Chamfers Angle/Tolerance | 45° ±15° |
| Diameter Tolerance | +0/-0.13 mm |
| Thickness Tolerance | ±0.25 mm |
| S2 Surface | Ground |
| Cleaning | Non-abrasive method, acetone or isopropyl alcohol on lens tissue recommended |
