Holographic pattern recording

Fig. 9. Holographic pattern recognition system, (a) Recording an angularly multiplexed hologram (b) forming correlation outputs using arbitrary input...

Fig. 19 SEM images of ID pattern recorded holographically by two beam interference in SU-8 and developed using a water rinse to minimize the capillary force of drainage [77]...

Figure 1 Formation of a holographic grating. Crossed laser beams create a sinusoidal intensity pattern recorded in the film through photochemical processes.

FIG. 5.16 (A) Experimental setup for holographic grating recording (B) schematic representation of electric field patterns on a vertically installed sample. 

Unfortunately, the experimental data cannot be correlated directly with the crystal structure, because some of the information needed is lost in recording the X-ray intensity pattern. Indeed, the diffracted X-ray beam is a vector, and it has both an intensity and a phase angle. The information concerning phase angle is lost during measurement of the X-ray intensity. The phase angle could, perhaps, be recorded by a holographic method, but X-ray lasers do not as yet exist. 

Another peculiar quality of holograms is that because the hologram records a set of interference patterns, this pattern is distributed equally and ubiquitously throughout the holographic plate, such that any part of... 

Visual comparison of the holographically recorded radiation pattern of a particle with Mie theory has also been used for particle sizing [71]. Holography has also been used to locate sub-micron particles in a 3-dimensional volume [72] and, in conjunction with an image analyzing computer, to size the droplets in sprays [73]. 

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