Optically indistinguishable copies of 3D real objects or holograms are known to be suitable to replace exhibited artistic pieces in museums. In this paper, we discuss holography as an alternative to protect, share and preserve finely crafted gold pieces belonging to the indigenous treasure inherited by Colombians. We present high diffraction efficiency monocolor and color holograms of native goldwork. As reference objects and proof of concept, we use replicas of the renowned and emblematic Poporo Quimbaya, pre-Hispanic gold pendants and anthropomorphic gold pieces. We report experimental details to deal with different types of commercial holographic recording materials, as for example, PFG-03M and PFG- 03C silver halides or C-RT20 photopolymers. And its general feasibility for reproducing high-quality holograms suitable for museum exhibitions or traveling art-collections.
Synthetic holograms have achieved a great impact in a variety of fields like architecture, advertising, army and art, and have proven their importance in advancing the holographic displays as visual communication media. Printing synthetic holograms needs the development of a holographic printer that from a set of 2D images allows to create 3D holographic images of real objects and computer generated objects. With the purpose of developing a holoprinter, we have implemented three related components: i) design and implementation of an optical system for direct writing of hogels, ii) a computational implementation to generate parallax 2D images and finally, iii) the implementation of an opto-mechanical and control system for automatic recording of the synthetic holograms. The three components have been developed under the restricted conditions of our holographic laboratory. In this way, a direct write optical setup was implemented using He-Ne laser, and an optical system for hogel writing with a field of view (FOV) of 60° was designed by using commercial lenses. To generate 2D parallax images, an application was created in the free computer graphics software Blender, applying different camera configurations. And a LabView application was made to automatically control obturation and displacement of the holographic plate. The system developed can record computer generated objects and real objects. Real objects are digitized by using a conventional photographic camera. Reflection full parallax holographic stereograms were recorded on PFG-01 plates and their holographic reconstructions are presented and discussed.
The holoprinter technology based on holographic stereograms has generated a fast development in holographic display
applications by the holographic recording of a 2D image sequence with information of a 3D scene, which could be real or
computer generated. The images used in holographic stereograms initially start from the acquisition of the different image
perspectives of the 3D scene by the re-centering camera configuration and then, this images must be rearranged before the
optical recording. This paper proposes a method to acquire the required images or hogel images in one step without using
rearrange algorithms, the method uses a virtual camera that moves along a virtual rail by conventional computer graphics
software. The proposed method reduced the time required to obtain the hogel images and enhance the quality of the 3D
holographic images; it also can be applied in different computer graphics software. To validate the method, a full parallax
holographic stereogram was made for a computer generated object.
This paper provides some examples about quantum games simulated in Python’s programming language. The quantum
games have been developed with the Sympy Python library, which permits solving quantum problems in a symbolic
form. The application of these methods of quantum mechanics to game theory gives us more possibility to achieve
results not possible before. To illustrate the results of these methods, in particular, there have been simulated the
quantum battle of the sexes, the prisoner’s dilemma and card games. These solutions are able to exceed the classic bottle
neck and obtain optimal quantum strategies. In this form, python demonstrated that is possible to do more advanced and
complicated quantum games algorithms.