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2PP system comprising femtosecond laser oscillator, high NA objective index matched into the resin system. An axicon lens is included to modify the laser intensity pattern at the focal plane of the objective.
Plan view of a three dimensional annular shape polymerized in a single exposure.
3D polymerization characteristics: (a) height and (b) width of the annulus wall as a function of exposure time for constant average laser power.
Complex patterns built up by a step-and-repeat process using the basic annular shape: (a) single layer and (b) stacked layers.
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