The graph shows typical measure ment results and the fitted dispersion curve for a K5 glass prism over the full glass transmission range that can be measured. A fit module for the Sellmeier coefficients is included in the soft ware, so that refrac tive index values can be estimated from measured ones at dif ferent wavelengths.
Example measurement on a K5 glass prism and a
Sellmeier fit to the data
The below plot shows the comparison of SpectroMaster® results and measurement data from an independent institute in the wavelength range 360...1100 nm.
Measurement results for an S-BAL2 sample prism The low temperature coefficient of this S-BAL2 glass allows highly accurate measure ments even in standard laboratory envi ronment which is reflected by the residuals < +/- 2× 10-6 compared to the reference values over the full measurement range.
Traceability of the SpectroMaster® mea surement results is guaranteed by the careful final inspection using several PTB certified reference prisms available at TRI OPTICS. Each SpectroMaster® is delivered with comprehensive certificates showing its traceable measurement results within the specification. This certification is re peated during installation at customer's site. On request, the instrument can be delivered with a PTB certified master sam ple for regular checks by the customer. The below measurement report demon strates exemplarily the excellent instrument accuracy with SpectroMaster® re producing the PTB results within <1×10-6. Unfortunately, all national laboratories cer tify only in a limited visual range.
Measurement report for comparison of SpectroMaster® measurement results with PTB certified values
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Products > SpectroMaster® > Operation > Measurement Results
