Recent improvements in solid state CW lasers, recording materials and light sources (such as LED lights) for displaying
color holograms are described. Full-color analogue holograms can now be created with substantially better image
characteristics than previously possible. To record ultra-realistic images depends on selecting the optimal recording laser
wavelengths and employing ultra-fine-grain, silver-halide materials. The image quality is improved by using LED
display light with improved spatial coherence. Recording museum artifacts using mobile holographic equipment is
described. The most recent recorded such holograms (referred to as OptoClones™) are the Fabergé Eggs at the Fabergé
Museum in St. Petersburg, Russia.
In recent years 3D information has become more easily available. Users' needs are constantly increasing, adapting to this reality and 3D maps are in more demand. 3D models of the terrain in CAD or other environments have already been common practice; however one is bound by the computer screen. This is why contemporary digital methods have been developed in order to produce portable and, hence, handier 3D maps of various forms. This paper deals with the implementation of the necessary procedures to produce holographic 3D maps and three dimensionally printed maps. The main objective is the production of three dimensional maps from high resolution aerial and/or satellite imagery with the use of holography and but also 3D printing methods. As study area the island of Antiparos was chosen, as there were readily available suitable data. These data were two stereo pairs of Geoeye-1 and a high resolution DTM of the island. Firstly the theoretical bases of holography and 3D printing are described, and the two methods are analyzed and there implementation is explained. In practice a x-axis parallax holographic map of the Antiparos Island is created and a full parallax (x-axis and y-axis) holographic map is created and printed, using the holographic method. Moreover a three dimensional printed map of the study area has been created using 3dp (3d printing) method. The results are evaluated for their usefulness and efficiency.
True color reflection holograms can be successfully recorded by exposing panchromatic holographic plates to 3 or more
LASER beams of suitable wavelengths. Traditional halogen spotlight illumination of color holograms relying on
reflection holograms’ Bragg diffraction sampling capabilities has many drawbacks. This kind of illumination, especially
for a broadband hologram, results in heightened levels of chromatic dispersion and blurring of image points far from the
hologram’s surface. On the other hand, by intensity mixing of selected narrow band LEDs with peak wavelengths
matched to those used during recording, high quality reproduction of deep color holograms can be achieved. In this
paper we will present the Holofos LED RGB and RGBW color hologram illumination devices. These devices have a
wide color gamut achieved by precision, digitally controlled, RGB intensity mixing at pre-selected wavelengths.
Dichroic and refractive optics combine the RGB or RGBW LEDs’ beams into quasi point-source output beam of
uniform color cross section. A quantitave spectro-radiometric characterization of the Holofos devices and resolution
tests results using a series of test holograms will also be presented.