During 2015, the International Year of Light, a traveling exhibition was developed and dedicated to holography. Despite the holograms are present in our day life, through several formats and different applications, for general public these 3D images are strange elements from complex technology. This exhibition explores several contents related with holograms, such as history, techniques, equipments, setups and applications and it involves a main structure with six interactive exhibits and a lab for hologram recording. The exhibition includes a group of nine art holograms, a workshop table dedicated to scratch holograms and a touch screen with information about holography, which can be download on-site or at home. All these contents, based on hands-on activities, are organized into five areas: "see", "do", "explore", "holo kids" and "to know more". The holography lab is based on a portable Denisyuk system and it allows the public to notice the typical darkroom environment needed to work on holography and also it allows visitors to make holograms as a souvenir of the exhibition. There are two types of visits: "Exploring the world of holograms" focus on visiting all contents and "Let's make an hologram" that, besides visiting, allows also to make holograms. Light Windows is an exhibition dedicated to the general public that during the last year has been traveling around six Portuguese cities. This paper will present and analyze all results obtained and it will discuss exhibitions impact on visitors.
Since 1997 a program dedicated to holography has been developed and implemented in Portugal. This program started with focus on schools and science education. The HoloNetwork was created and it has been spread at a National level, involving a group of thirty schools and hundreds of students and teachers. In 2009 this network started to work to achieve a new target, the general public. With this goal, a larger program was developed with focus on science and society and on science communication through holography. For the implementation of this new program, special holography outreach activities were built, dedicated to informal learning and seven Science Centers around Portugal were add into the HoloNetwork. During last years, we have been working on holography, based on two main branches, one dedicated to schools and with the aimed to promote physics teaching and to teach how to make holograms, and another dedicated to society and with the aimed to promote holography and to increase scientific literacy. This paper would analyze the educational program, all holography outreach activities, exhibitions or events, all equipments, materials and setups used and it would present the holographic techniques explored with students or with the public. Finally, the results obtained in this work would be present and explored, with focus on students impact and outcomes, taking into account the public engagement on holography and its effect into scientific culture and analyzing the quality of holograms made by students and by the general public. subject.
Holography is an optics technique based on wave physics and lasers with several applications at our day life. The production of holograms involves experimental work based on hands-on activities and creativity. All these elements can contribute to the promotion of experimental teaching of optics and training on holography. The hologram itself acting as a final result from a long process of research and study can enable the engagement of high school students on physics and promote the stimulus on optics learning. Taking these assumptions into account a network of schools working on holography was built involving thirty schools from all country. Holography systems were developed and several hands-on activities were constructed. During last sixteen years students are working on laser optics and holography producing different kinds of holograms. This study presents all holography labs implemented at schools and it will analyzed the holography systems and materials developed for students. Training strategy will be discussed and holograms obtained by students will be presented. Results obtained show us that holography can be implemented as a strategy for promoting the learning of optics and it is a particular way to involve students on experimental work and lab research. Results obtained during this study will be presented in detail and analyzed with focus on students performance. Educational results, teachers training, prizes and other positive outcomes will be discussed and compared.
Organic-inorganic hybrid materials are a technologically key class of advanced multifunctional materials that fulfil the
challenging strict requirements of the beginning of the century: higher levels of sophistication, miniaturisation,
recyclability, reliability and low energy consumption with potential to be used as low-cost components in optical
networks operating at high bit rates. In this work, high-rejection optical filters (19 dB) first-order Bragg gratings
inscribed in channel waveguides written in thin films of sol-gel derived organic-inorganic hybrid based on methacrylic
acid modified zirconium tetrapropoxide, Zr(OPrn)4, (so-called di-ureasils), using UV-laser direct-write method.
Optical holography, typically, uses laser light as coherent source for interference pattern construction and holographic registration. Interference simulation and pattern printing has been possible through computer aids and plotter printing with photographic reduction. With powerful computers and modem laser printers, computer generated holograms can be demonstrated in a simpler way. During this work, computer software was developed and Fourier holograms were
produced from simple digital images. The computation process uses a Fourier Transform algorithm to simulate the interference pattern, which is then transformed into a binary matrix. The software was developed to generate also dynamic holograms from an array of digital movie frames. In this paper the software will be presented and the
visualization setup and some results will be analysed.
Color control is very important in some holographic applications and its is a procedure that should be taken into account during practical holography. In this paper an optimized procedure for reflection holograms recorded in Slavich PFG-01 emulsions will be presented. The procedure is mainly focused on measurements of different colors obtained by manipulation of the emulsion thickness before exposure, which has been preswollen in solution of different concentrations of Triethanolamine and recorded with different exposure times. Experimental configurations and chemical processing will be presented. The results obtained will be analyzed and discussed.
Teaching holography at high school level is a fascinating task and an important teaching tool. The impact on students is very positive and satisfactory at a personal level as well as at a pedagogical level. The purpose of this work is the 3D imaging by holographic means for application in different educational areas. In this paper we present a project that intends to explore the technique and some applications of holography for particular aims in each field of study. The educational strategy based on contextualized teaching of optics with multi disciplinary and technological applications will be presented. A comparison between the interest on holography by science and art students will be analyzed. The experimental configurations and chemical processing will be presented. The result obtained will be analyzed and discussed.
Holography related activities in Portugal have been mainly concentrated in the areas of scientific research, teaching and fine arts. These activities take place in different laboratories located at Universities of Porto/ CETO (Centro de Ciências e Tecnologias Opticas), Aveiro, Lisboa and Covilhä, research centers and institutes, like INETI (Instituto Nacional de Engenharia e Tecnologia Industrial). The holographic principles and technologies are taught in graduate and undergraduate courses. Seminars, workshops, talks and exhibitions are organized regularly to the specialists and the general public.
In the last decades, holography has been used in a wide variety of applications in many different fields. In this paper, a study case of using holography in High School teaching will be presented. A holographic system for white- light reflection and transmission holograms was implemented and developed for teaching optics to science and visual arts students. Particular emphasis will be put on basic holographic principles, experimental holographic techniques, chemical processing and color control of holograms. The results obtained show an improvement of the learning and creative processes and the advantages of interdisciplinary and co-operation between Universities and High Schools.