Technical Issues - FilmStar News 2018
January 2 Collector to Targets
DESIGN...Reverse-engineering can be more reliable when P/S measurements at angles > 0 are included. New multi-angle attachments (Cary UMA, PE Lambda with ARTA/TAMS) and the Spectra Collector enable users to save data in a single file. That capability has been enhanced with DESIGN 2.61.4150 able to quickly convert multi-angle spectra to Optimization Targets. (Previously this required opening multiple spectra and tediously converting one at a time or writing a macro utilizing BASIC Function SpecTargets.)
The procedure is as follows:
Note that blue cells in the Collector grid indicate calculated data. Also note that Collector wavelength units (nm) were converted to current DESIGN units (Ám).
January 8 IndexSolve Updated with Collector
originally developed some years ago to
automate (executable video file) a user's manual procedure for deducing n,k for silver
through %R/%T measurements at multiple angles. The method is useful
for metals of known thickness when it is impossible to utilize
dispersive functions. The method depends on selecting a film
thickness wherein both %R and %T can be accurately determined.
You need to run the calculation twice, for %T and %R. The values shown below were utilized.
Upon running this you
obtain TP/TS and RP/RS 6░ columns. These were averaged (giving TR
and RR) by highlighting adjacent 6░ columns and clicking
Spectra.. Average P and S. If columns are not highlighted all
P and S columns are averaged. In practice, data are generated by
FilmStar MEASURE or by other programs via Excel transfer to
Exercise for advanced users: Add noise to calculated spectra and see how it affects results.