Wave front distortions with Zemax/2

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Wave front distortions with Zemax/2

Post  Alessio on Tue Nov 24, 2009 9:32 pm

I used the aberration free telescope to evaluate wave front distortions induced by the 3deg wedge and the thermal lensing. All scales are in units of lambda. All the results are in "relative mode": they are calculated by subtraction of a reference wave front (as the Shack-Hartmann sensor does).

The first picture shows the wave front distortion induced by the wedge, no thermal lensing is applied: it is the difference between the wave front with wedge and that without wedge. Maximum distortion is -6*10-3 lambda (circa lambda/166).



Then, I introduced a 3km ROC thermal lens in the wedged TM. Maximum distortion is 0.025 lambda (lambda/40).



Finally, I increased the lensing by a factor of 10, the ROC is now 300m. Maximum distortion is more than 0.3 lambda (lambda/3).

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Alessio

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Wave front of the whole beam

Post  Alessio on Wed Nov 25, 2009 9:36 pm

Yesterday's images where showing only the central part of the beam. With Matlab, I managed to get nice images of the whole beam wave front distortions.





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