The Use Of Ray Intercept Curves For Evaluating Holographic Optical Elements

With "ordinary" optics,i.e., refractive and reflective optics, obtaining field of view is not a problem, per se. Holographic optics, however, are diffractive in nature; in order to achieve the required optical efficiency, one usually must work with "thick" or "volume" holograms, and these volume holograms have a strong angular selectivity that tends to limit the field of view.