24 bands (in micrometer)    	 4 bands	     1 band
     1 	0.20 - 0.30            1  0.20-0.69	   1  0.20-4.0
     2  0.30 - 0.33	       2  0.69-1.19
     3  0.33 - 0.36	       3  1.19-2.38
     4  0.36 - 0.40	       4  2.38-4.00
     5  0.40 - 0.44
     6  0.44 - 0.48
     7  0.48 - 0.52
     8  0.52 - 0.57
     9  0.57 - 0.64
    10  0.64 - 0.69
    11  0.69 - 0.752
    12  0.752 - 0.780
    13  0.780 - 0.867
    14  0.867 - 1.0
    15  1.0 - 1.096
    16  1.096 - 1.19
    17  1.19 - 1.276
    18  1.276 - 1.534
    19  1.534 - 1.645
    20  1.645 - 2.128
    21  2.128 - 2.381
    22  2.381 - 2.907
    23  2.907 - 3.425
    24  3.425 - 4.0