1) Accuracy is traceable to national standards and repeatability is demonstrated by measurement of a certified reference prism (material N-BK7, homogeneity H4, apex angle 65°, aperture Ø30mm, surface quality λ/10) at the following wavelengths: 404.6 / 435.8 / 479.9 / 508.6 / 546.1 and 643.8 nm.
Compliance with the above specifications requires optimum and stable environmental conditions in terms of temperature (±0.1°C), humidity (50-70%), pressure (±0.5 hPa) and airflow, high surface quality of the specimen (< λ/10) and an aperture of not less than Ø30 mm. We also recommend the “Meteo Station 5-400-030” as an accessory for monitoring ambient conditions.
2) Verified at the wavelengths 312 and 365 nm with a reference specimen (material quartz glass, tip angle 65°, aperture Ø30 mm).
3) Verification at the wavelengths 1014 and 1530 nm with a reference specimen (material N-BK7, tip angle 65°, aperture Ø30 mm).
4)Verification at a wavelength in the specified range with a reference specimen (material ZnSe, tip angle 20°, aperture Ø20 mm).