DETAILED DESCRIPTION OF THE INVENTION The method of the invention in its first aspect is preferably realized by way of a holographic recording assembly of a type shown in FIGS.
1 and 2, as assembly 10.
The recording assembly 10 preferably comprises a conventional lens 12, preferably geometrically centered to collect and direct an appropriate amount of laser radiation, emanating from an input or object beam 14, to a diffuser 16.
The diffuser 16 comprises an optical mask comprising a scattering medium, for example, a ground glass.
The diffuser 16 is masked coincident or congruent with a desired arbitrary aperture 18, in this case, a long narrow slit.
The slit, in typical applications, has an aspect ratio of at least 100 to 1, in particular, an aspect ratio of at least 1000 to 1, for example, an aspect ratio of 1300 to 1.
FIGS.
1 and 2 further show an array of conventional lenses 20, 22 that can function, in a well known way, to collect and focus a reference beam 24 onto a conventional sensitized plate 26.
Note that the array of lenses 20, 22 preferably comprises optical properties appropriate to a beam shape and aperture of final reconstructing input beams, in this case (as shown in FIG.
3, infra), a number of laser diodes with divergent beams of elliptical cross-section.
The operation of the FIGS.
1 and 2 holographic recording assembly 10, is as follows.
The sensitized plate 26 is preferably placed between the lens array (12, 20, 22) and their focal planes, such that the radiation 14 from all of the diffusely illuminated aperture 18 illuminates the sensitized plate 26.
This illumination, in turn, interferes with the reference beam 24, thereby constructing an interference hologram comprising a plurality (here, two) of discrete holographic optical elements 28, 30.
Attention is now directed to FIG.
3, which shows a holographic reconstructing assembly 32 that is preferably used to realize the second aspect of the method of the present invention.
The FIG.
3 reconstructing assembly 32 includes the FIGS
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Optical Systems 
