Scan method, ascending

Vitamin Bi 2 Method Ascending, one-dimensional development in a twin-trough chamber with chamber saturation. After application of the Fig. 1 Fluorescence scan of a blank track (A) and of a chromatogram track with 5 ng thiamine per chromatogram zone (B). 

Fig. 24 Schematic ascending scan method for achieving isolated and complete 3D voxels, a laser beam focusing that illustrates the substrate truncation effect, b voxels formed at different focusing level, and c SEM image of voxels produced by scanning the laser focal spot from inside to above the substrate...

The above result is consistent with that predicted in imaging theories [162, 163]. It is interesting to know whether a similar rule holds true when a femtosecond laser interacts with a typical nonlinear material in a two-pho-ton nanofabrication processes. The ascending scan method [20] was used to explore this, making it possible to intuitively discriminate how the focal spot size and shape are influenced by NA and other laser parameters. Shown in Fig. 29a are the side-view SEM images of voxels formed with objectives of NA 0.88, 1.12 and 1.4, respectively. In order to get comparable data, the exposure power measured at the objective output was kept identical and the... 

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