Individual I-ripples are fitted with the following formula:
Intensity/MEAN(Intensity)=K_0+(K_1 cos(Phi/2)+ K_2 sin(Phi/2))^2
where Phi is the tuning angle, i.e. the angle of the tuning half-wave plate.
The values of the constants K_0, K_1, and K_2 are shown below for
different fine tuning sequences taken in August 2009 and in October 2006
(results for front camera):

E1
----------------------------------------------------------------
           10/2006     2007023     2007703   2007879    2007987

I-Ripple    2.027%       0.849%      1.11%     0.985%    0.964%
K_0         0.9899       0.9961      0.9952    0.9954    0.9954
K_1        -0.0081       0.0399      0.0484    0.0456    0.0464
K_2         0.1421       0.0803      0.0852    0.0847    0.0866


WB
----------------------------------------------------------------          
           10/2006     2007023     2007703   2007879    2007987

I-Ripple    0.988%       0.586%      0.833%    0.858%    0.821%
K_0         0.9951       0.9956      0.9957    0.9956    0.9956
K_1        -0.0597      -0.0605     -0.0697   -0.0716   -0.0716
K_2         0.0794       0.0536      0.0618    0.0609    0.0614

NB
----------------------------------------------------------------          
           10/2006     2007023     2007703   2007879    2007987

I-Ripple    1.152%       0.756%      0.802%    0.839%    0.821%
K_0         0.9942       0.9963      0.9961    0.9956    0.9956
K_1        -0.0710      -0.0625     -0.0680   -0.0702   -0.0708
K_2        -0.0805      -0.0597     -0.0602   -0.0629   -0.0612


Overall I-ripple: 1.87%