Note: BARR's measurements were performed at 296 K for the filter themselves. The values given for 77K were calculated by applying the same thermal shift as measured on one witness piece and assuming the same thermal behaviour for all. While the filters above are numbered 1 - 6, these numbers do not bear any relationship to the numbering system on the package as BARR did not indicate any filter numbering at all. The numbers on the packaging are mine and for tracking purposes only.
All values given in nm.
Postscript of a typical transmission curve scan for a typical BARR z filter performed
at 296 K.
Latest Revision: September 12, 1997