Imaging Laser direct

Typical lithographic applications of dye-sensitized photopolymerization today include direct laser imaging of printed wiring boards, based on a visible laser-sensitive resist (Riston LV ) developed by Dupont. ... 

Fig. 2 SEM images of non-interlaced (a L) spiral structures recorded by direct laser writing in SU-8 [11] and their transmission/reflection spectra. Upper row spirals with lateral period a = 3.0 p.m, arm length L = 2.7 p.m, vertical spiral pitch c = 4.32 p.m, structure volume 16 X 16 X 8 spiral periods. (Lower row a = 0.95 p.m, L = 0.7 p.m, c = 1.484 jjim,...

Applications of this nonlinear laser imaging technique holds the promise of directly studying the effect that capillary wave stresses exert upon the surfactant layer as well as those exerted by the surfactant on the water surface. The importance of capillary wave/surfactant dynamics at the ocean underscores the importance of these experiments and suggests that further efforts directed toward extending these experimental techniques to in situ ocean studies would be most useful. 

Fig. 11. Direct light image of a Mercenaria mercenaria bivalve sheU, showing that the carbonate is precipitated in layers each dark/hght band represents one year of growth. These layers can be sampled at sub-annual resolution using laser ablation techniques, or high precision microdrih apparatus. Image courtesy of Mary Elliot (University of Edinburgh).

Figure 11.9 Schematic illustration of the principles of confocal fluorescence microscopy singlephoton exdted fluorescence occurs along the entire beam path, however the insertion of a pinhole in the focal plane of the objective ensures that fluorescence from outside the focal point of the laser (dashed line) is prevented from reaching the detector. The laser is scanned in theX-K plane to build up an image of the sample for a given depth. Translation of the sample in the Z-direction allows images (optical sections) to be recorded as a function of depth...

---