Converters; Signal converters; Data conversion apparatus, namely, digital hologram converters; Digital hologram conversion apparatus, namely, digital hologram converters; Downloadable image files containing holograms in the field of digital holography and 3-D imaging; Holography apparatus; Downloadable image files containing holographic images in the field of digital holography and 3-D imaging; Imaging apparatus, namely, apparatus for recording and reconstruction of digital holograms; Image p...