DescriptionSpecifications
Models
Catalog PDF
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Our OC.20 mirror coating is designed for laser cavity output coupling in the wavelength range of 720–890 nm. This coating is carefully designed and manufactured to deliver minimum pulse dispersion and the wide bandwidth required for ultrashort pulse laser systems. OC.20 offers reflection of 88% and transmission of 12% with essentially zero absorption from 720–890 nm. An AR.16 broadband antireflection coating on the second surface of the output coupler reduces unwanted secondary reflections. The OC.20 coating is available on 12.7 and 25.4 mm diameter flat precision polished BK 7 substrates. |
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Specifications
| Material | BK 7, grade A, precision annealed optical glass |
| Surface Flatness S1, S2 | ≤λ/10 at 632.8 nm over the clear aperture |
| Clear Aperture | ≥central 80% of diameter |
| Surface Quality | 15-5 scratch-dig |
| Diameter Tolerance | +0/-0.13 |
| Thickness Tolerance | ±0.25 mm |
| Angle of Incidence | 0–10° |
| S1 Coating | OC.20, Rs, Rp = 88% ±2.5%, 720–890 nm, 0–10° AOI |
| S2 Coating | AR.16 broadband, multilayer antireflection coating
Ravg <0.5%, Rmax <1.5%, 650–1000 nm, 0–15° AOI |
| Durability | MIL-C-675C, moderate abrasion |
| Cleaning | Non-abrasive method, acetone or isopropyl alcohol
on lens tissue recommended (Unknown type Newport.Step.Product.XRefElement) |