\begin{table}%T6
\caption{Measured characteristics of the VUV 10~pm interferometer.} 
\label{table:6}      
%\centering
 \small          
\begin{tabular}{l }  
\hline \hline                  
 Operating wavelength: $\lambda=155$~nm \\   
Clear aperture : 25 mm \\
Coating reflectance: 0.77 \\ 
Effective reflectance: 0.59 \\ 
Reflective finesse: $F_{\rm R}=12$ \\ 
Defect finesse: 6.8  \\ 
Total finesse: 5.9 \\ 
Optical gap: $d=200$ mm \\ 
Free spectral range: 61~pm \\ 
Passband width: 10~pm \\
Order: $m=2580$ \\
Transmittance: $T=58\%$ (Loss $L=4.2\%$) \\
\hline                                   %inserts single line
\end{tabular}
\end{table}