MCS260 
CORNERSTONE 260 MONOCHROMATORS 
30 
 
 
 
 
Calculation of Resolution Based on Fixed Slit Selection 
77222  10 µm*  0.13 nm  0.06 nm  0.13 nm 
77220  25 µm*  0.32 nm  0.16 nm  0.32 nm 
77218  120 µm  1.54 nm  0.77 nm  1.55 nm 
77216  600 µm  7.68 nm  3.8 nm  7.74 nm 
77215  760 µm  9.73 nm  4.9 nm  9.80 nm 
77211  6.32 mm  81 nm  40 nm  82 nm 
 
 
* For slits with widths of 50 µm or less, aberrations begin to play a role in the actual achievable 
resolution. The values noted above, unless otherwise stated, are calculations based on the slit 
widths and grating dispersions. 
 
** Empirically measured resolution values shown which differ from calculations due to aberrations 
present when using narrow slit widths. 
 
 
 
 
 
 
 
Figure 20:  Some of the Fixed Slit Sizes Available