 Of a total of  25000 rays, of which   6465 formed the input set 
      0 were out of the mirror N.    1
 The mirror collects   1.0000     of the incoming flux.
 The average reflectivities are :
 S-pol                      0.88545    
 P-pol                      0.88543    
 Total                      0.88544    
 The overall efficiency of the mirror is : 0.88544    
