. The peak efficiency
is 65 per cent. The throughput of the Fabry-Perot etalons used
in TAURUS is difficult to quantify, but should be in the range
70 to 90 per cent. The triple period interference filters used
as blocking filters have a typical peak transmission of about
60 per cent. The peak efficiency of the complete system is
therefore likely to be about 30 per cent.
[ TIFF ]
Figure: The efficiency of the TAURUS-2 focal reducer (i.e. camera
plus collimator)