Conclusion
In this experiment, we sucessfully used the DMD chip to apply a focus aberration to an optical wavefront.
This was demonstrated when we observed the predicted diffraction pattern associated with our Fresnel Zone Plate pattern. We sucessfully used the DMD chip to attain the blaze condition, acheiving a very high diffraction efficiency for a specific order.
Most importantly, we were able to manipulate the diffraced wavefront to significantly reduce astigmatic aberration.
Hence, we successfully used the DMD chip to control and manipulate an optical wavefront.
Nevertheless, there is much room for development. For starters, the corrected wavefront could be significantly improved by using an interferometer to quantitatively measure the dimensions of the wavefront.
We have also learnt that the micro-mirror array has significant surface irregularities, which would contribute to the wavefront distortion. Overall, the DMD chip shows much promise for future use in wavefront control.
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