Collimating microlenses

Another report by Cox and Guan discloses collimating microlenses that are printed directly on the end of optical fibers using... 

Cox WR, Guan C. (2001) inkjet printing of collimating microlenses onto optical fibers, US2001033712. 

Figure 830 (a) Output optical field of silica planar waveguide excited by He-Ne laser, (b) Top view of the silica planar waveguide excited by He-Ne laser. Three Si3N4 microlenses are embedded to obtain the collimated beam and focalized beam. 

Similar technology is used to create raster systems. In this case the mosaic of the holographic microlenses with an anisotropic structure is arranged. Fig.l4 shows the image of such raster placed between crossed polarizers and the diffraction pictures on this raster. Fig. 14 a is the image of the raster between crossed polarizaers. Fig. 14 b shows the diffraction of the expanded collimated beam He-Ne laser (A= 632.8 nm) on this raster and Fig. 14 c shows the diffraction of the unexpanded beam on one of the microlense of the raster. 

To have stacked planar optics, all optical devices must have a planar structure. The array of microlenses on a planar substrate is required in order to focus and collimate the... 

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