Suchergebnisse

The benefits of two-dimensional (2D) materials for applications in nanotechnology can be widened by exploiting the intrinsic anisotropy of some of those crystals, being black phosphorus the most well-known example. In this work we demonstrate that the anisotropy of TiS3, which is even stronger than that of black phosphorus, can be tuned by means of strain engineering. Using density functional theory calculations, we find that the ellipticity of the valence band can be inverted under moderate compressive strain, which is accompanied by an enhancement of the optical absorption. It is shown that the strain tuning of the band anisotropy can be exploited to focus plasmons in the desired direction, a feature that could be used to design TiS3 nanostructures with switchable plasmon channeling. ; This work has received funding from the European Union's Seventh Framework Programme (FP7/2007-2013) through the ERC Advanced Grant NOVGRAPHENE (GA No. 290846), European Commission under the Graphene Flagship, Contract CNECTICT-604391, the Spanish MINECO (through Grant Nos. FIS2015-64886-C5-4-P, FIS2014- 58445-JIN, Ramon y Cajal Program RYC-2016-20663, and ́ the Severo Ochoa Centers of Excellence Program under Grant SEV-2015-0496), and the Generalitat de Catalunya (2017SGR1506). ; Peer reviewed

The work is devoted to the development of a device for counteracting laser means of location and destruction. The analysis of data from open literature on similar systems and technologies have been performed. Theoretical calculations of the effectiveness of protecting the human eye or optical device from laser damage with various types of protection have been carried out.Laser technology has been used by the military since the mid-1950s. The military uses lasers in systems of direct thermal destruction of the object, pointers, detection systems of snipers, systems of interference with snipers, rangefinders, etc. In the late 1970s and early 1980s, military-experimental blinding self-propelled complexes were created in the USSR. The development of laser and computer technology has significantly reduced the dimensions of the devices, as well as their cost. Now such systems are widely used in combat operations.On the other hand, there is a challenge to counteract such complexes. Systems are needed that can hide optical systems from detection, as well as prevent them from being destroyed by blinding complexes.The purpose of the work is to develop a system to counteract the laser complexes of location and damage. Its task is to hide the optical device from laser scanning systems and prevent the damage of the optical device or the human eye by blinding laser radiation.The relevance of this article is due to the need to create new and improve existing electronic systems to counteract the laser means of location and destruction. Despite the fact that studies in this area are conducted for more than one year, the choice of such systems is very small.To minimize the probability of detecting an optical device, mechanical means of narrowing the beam glare angle are commonly used. One example is cellular blinds. The length of one cell must be much higher than its diameter. The surface of the cell tubes should be blackened to reduce the reflection of light rays. For more accurate narrowing of the flare angle, it possible to set several cellular blends in a row - the number depends on their optical qualities.Optical means include optical filters that absorb, block, or scatter the infrared spectrum, because laser detectors of optical devices are in it. Such a filter should be placed on the optical sight between the lens and the lens hood. After all, it reflects the infrared rays, working as a mirror. Therefore, this angle of reflection should be reduced by all means, in particular tubular blinds, as described above.However, these methods cannot fully protect the operator of the optical observation device from the powerful laser radiation directed to the device. To solve this problem, you can use technology that completely blocks the optical channel when you receive high-power laser radiation on an optical device. The radiation sensors respond to the high-power laser radiation of the destruction and transmit the signal to an electronic circuit, which turn on a liquid crystal filter that covers the optical channel. Under the influence of electric current, liquid crystals become a special structure in such a way that infrared radiation does not pass through the filter. When the radiation is lost, the electronic system returns the liquid crystal filter to a transparent state.The power impulse of laser means of location and destruction can significantly damage a person's vision, and at large lens diameters or at short distances between a these means and an observer, a person may lose it completely. The same applies to light-sensitive arrays of optoelectronic devices. As shown in the calculations, the maximum permissible level of radiation energy density in unprotected optics is much lower than the radiation energy density provided by laser means of location and destruction.The opto-electronic protection system reduces the time of laser radiation to the human eye or the light-sensitive matrix of the optoelectronic device to safe limits. As shown by the calculations, this increased the maximum allowable level of radiation energy density above the level provided by power lasers for their entire range of use and lenses with diameters from 24 mm to 100 mm, which will protect them from the blinding effect of laser means of location and destruction. ; Робота присвячена розробці пристрою для протидії лазерним засобам локації та ураження. Проведено аналіз даних з відкритих літературних джерел про аналогічні системи та технології. Проведено теоретичні розрахунки ефективності захисту людського ока або оптичного приладу від лазерного ураження при різних типах захисту.

The work is devoted to the development of a device for counteracting laser means of location and destruction. The analysis of data from open literature on similar systems and technologies have been performed. Theoretical calculations of the effectiveness of protecting the human eye or optical device from laser damage with various types of protection have been carried out.Laser technology has been used by the military since the mid-1950s. The military uses lasers in systems of direct thermal destruction of the object, pointers, detection systems of snipers, systems of interference with snipers, rangefinders, etc. In the late 1970s and early 1980s, military-experimental blinding self-propelled complexes were created in the USSR. The development of laser and computer technology has significantly reduced the dimensions of the devices, as well as their cost. Now such systems are widely used in combat operations.On the other hand, there is a challenge to counteract such complexes. Systems are needed that can hide optical systems from detection, as well as prevent them from being destroyed by blinding complexes.The purpose of the work is to develop a system to counteract the laser complexes of location and damage. Its task is to hide the optical device from laser scanning systems and prevent the damage of the optical device or the human eye by blinding laser radiation.The relevance of this article is due to the need to create new and improve existing electronic systems to counteract the laser means of location and destruction. Despite the fact that studies in this area are conducted for more than one year, the choice of such systems is very small.To minimize the probability of detecting an optical device, mechanical means of narrowing the beam glare angle are commonly used. One example is cellular blinds. The length of one cell must be much higher than its diameter. The surface of the cell tubes should be blackened to reduce the reflection of light rays. For more accurate narrowing of the flare angle, it possible to set several cellular blends in a row - the number depends on their optical qualities.Optical means include optical filters that absorb, block, or scatter the infrared spectrum, because laser detectors of optical devices are in it. Such a filter should be placed on the optical sight between the lens and the lens hood. After all, it reflects the infrared rays, working as a mirror. Therefore, this angle of reflection should be reduced by all means, in particular tubular blinds, as described above.However, these methods cannot fully protect the operator of the optical observation device from the powerful laser radiation directed to the device. To solve this problem, you can use technology that completely blocks the optical channel when you receive high-power laser radiation on an optical device. The radiation sensors respond to the high-power laser radiation of the destruction and transmit the signal to an electronic circuit, which turn on a liquid crystal filter that covers the optical channel. Under the influence of electric current, liquid crystals become a special structure in such a way that infrared radiation does not pass through the filter. When the radiation is lost, the electronic system returns the liquid crystal filter to a transparent state.The power impulse of laser means of location and destruction can significantly damage a person's vision, and at large lens diameters or at short distances between a these means and an observer, a person may lose it completely. The same applies to light-sensitive arrays of optoelectronic devices. As shown in the calculations, the maximum permissible level of radiation energy density in unprotected optics is much lower than the radiation energy density provided by laser means of location and destruction.The opto-electronic protection system reduces the time of laser radiation to the human eye or the light-sensitive matrix of the optoelectronic device to safe limits. As shown by the calculations, this increased the maximum allowable level of radiation energy density above the level provided by power lasers for their entire range of use and lenses with diameters from 24 mm to 100 mm, which will protect them from the blinding effect of laser means of location and destruction. ; Робота присвячена розробці пристрою для протидії лазерним засобам локації та ураження. Проведено аналіз даних з відкритих літературних джерел про аналогічні системи та технології. Проведено теоретичні розрахунки ефективності захисту людського ока або оптичного приладу від лазерного ураження при різних типах захисту.

The work is devoted to the development of a device for counteracting laser means of location and destruction. The analysis of data from open literature on similar systems and technologies have been performed. Theoretical calculations of the effectiveness of protecting the human eye or optical device from laser damage with various types of protection have been carried out.Laser technology has been used by the military since the mid-1950s. The military uses lasers in systems of direct thermal destruction of the object, pointers, detection systems of snipers, systems of interference with snipers, rangefinders, etc. In the late 1970s and early 1980s, military-experimental blinding self-propelled complexes were created in the USSR. The development of laser and computer technology has significantly reduced the dimensions of the devices, as well as their cost. Now such systems are widely used in combat operations.On the other hand, there is a challenge to counteract such complexes. Systems are needed that can hide optical systems from detection, as well as prevent them from being destroyed by blinding complexes.The purpose of the work is to develop a system to counteract the laser complexes of location and damage. Its task is to hide the optical device from laser scanning systems and prevent the damage of the optical device or the human eye by blinding laser radiation.The relevance of this article is due to the need to create new and improve existing electronic systems to counteract the laser means of location and destruction. Despite the fact that studies in this area are conducted for more than one year, the choice of such systems is very small.To minimize the probability of detecting an optical device, mechanical means of narrowing the beam glare angle are commonly used. One example is cellular blinds. The length of one cell must be much higher than its diameter. The surface of the cell tubes should be blackened to reduce the reflection of light rays. For more accurate narrowing of the flare angle, it possible to ...

Compositional engineering of BiFeO3 can significantly boost its photovoltaic performance. Therefore, controlling site substitution and understanding how it affects the optical and electronic properties while achieving robust and stable phases is essential to continue progressing in this field. Here the influence of cation co-substitution in BiFeO3 on phase purity, optical and electronic properties is investigated by means of X-ray diffraction, spectroscopic ellipsometry and X-ray absorption spectroscopy, respectively. Piezoelectric force microscopy and ferroelectric characterization at room temperature has been carried out in co-doped BiFeO3 films. First-principles calculations are also performed and compared to the experimental observations. It is shown that the incorporation of La3+ in Bi(Fe,Co)O3 films improves phase purity and stability while preserving the reduced band gap achieved in metastable Bi(Fe,Co)O3. Moreover, it is suggested that the changes in the optoelectronic properties are mainly dictated by the hybridisation between unoccupied Co 3d and O 2p states along with the presence of Co3+/Co2+ species. This thorough study on (Bi,La)(Fe,Co)O3 thin films coupled with the use of a cost-effective and facile solution deposition synthesis increases the motivation to continue exploiting the potential of these perovskite materials. ; This research was supported by the Spanish Ministerio de Ciencia, Innovación y Universidades ("Severo Ochoa" Programme for Centres of Excellence in R&D CEX2019-000917-S, MAT2017-83169-R, RTI2018-093996-B-C32, PID2019-107727RB-I00 (AEI/FEDER, EU)). P. M. thanks financial support from FPI fellowship (PRE2018-084618). C. M. and C. C. acknowledge computational resources and technical assistance from the Australian Government and the Government of Western Australia through the National Computational Infrastructure (NCI) and Magnus under the National Computational Merit Allocation Scheme and The Pawsey Supercomputing Centre. The authors acknowledge Prof. J. Fontcuberta for providing access to his experimental facilities and the support of ALBA staff for the successful performance of the measurements at CIRCE beamline of the ALBA Synchrotron Light Source. I. F. and C. C. acknowledge support from the Spanish Ministry of Science, Innovation and Universities under the "Ramón y Cajal" fellowship RYC2017-226531 and RYC2018-024947-I, respectively. M. C and I. F acknowledge Beca Leonardo from fundación BBVA. H. T is financially supported by China Scholarship Council (CSC) with no. 201906050014. The work of P. M. and H. T have been done in the framework of the doctorate in Materials Science of the Autonomous University of Barcelona. ; Peer reviewed

DROP-IT is a 3years H2020 European project starting in November 2019. DROP-IT "DRop-on demand flexible Optoelectronics & Photovoltaics by means of Lead-Free halide perovskITes". FOTON Institute - INSA Rennes and ISCR are part of the DROP-IT consortium (8 European partners). DROP-IT will combine optoelectronics and photonics in a single flexible drop-on demand inkjet technology platform by means of exploiting the enormous potential of lead-free perovskite materials. FOTON Institute – INSA Rennes will be in charge of the simulation task of the project. The first year has been mainly focusing on 2 tasks i) the state-of-art bibliography and analysis of the lead-free materials for solar cells, leds,photocatalysts, and then ii) the exploration of new lead-free materials by Density Functional Theory. DROP IT consortium : UNIVERSITAT DE VALENCIA (Spain), UNIVERSITAT DE BARCELONA (Spain), UNIVERSITAT JAUME I DE CASTELLON (Spain), EIDGENOESSISCHE TECHNISCHE HOCHSCHULE ZUERICH (Switzerland), FUNDACJA SAULE RESEARCH INSTITUTE (Poland), SAULE SP ZOO (Poland), AVANTAMA AG (Switzerland), INSTITUT NATIONAL DES SCIENCES APPLIQUEES DE RENNES (France) Disclaimer excluding Agency responsibility: This project has received funding from the European Union's Horizon 2020 research and innovation Programme under the grant agreement No 862656. The information and views set out in the abstracts and presentations are those of the authors and do not necessarily reflect the official opinion of the European Union. Neither the European Union institutions and bodies nor any person acting on their behalf may be held responsible for the use which may be made of the information contained herein.

There is an increasing need to control light phase with tailored precision via simple means in both fundamental science and industry. One of the best candidates to achieve this goal are electro-optical materials. In this work, a novel technique to modulate the spatial phase profle of a propagating light beam by means of liquid crystals (LC), electro-optically addressed by indium-tin oxide (ITO) grating microstructures, is proposed and experimentally demonstrated. A planar LC cell is assembled between two perpendicularly placed ITO gratings based on microstructured electrodes. By properly selecting only four voltage sources, we modulate the LC-induced phase profle such that non-difractive Bessel beams, laser stretching, beam steering, and 2D tunable difraction gratings are generated. In such a way, the proposed LC-tunable component performs as an all-in-one device with unprecedented characteristics and multiple functionalities. The operation voltages are very low and the aperture is large. Moreover, the device operates with a very simple voltage control scheme and it is lightweight and compact. Apart from the demonstrated functionalities, the proposed technique could open further venues of research in optical phase spatial modulation formats based on electro-optical materials. ; This work was supported by the Comunidad de Madrid and FEDER Program (S2018/NMT-4326), the Ministerio de Economía y Competitividad of Spain (TEC2013-47342-C2-2-R and TEC2016-76021-C2-2-R), the FEDER/Ministerio de Ciencia, Innovación y Universidades and Agencia Estatal de Investigación (RTC2017-6321-1, PID2019-109072RB-C31 and PID2019-107270RB-C21). The authors also acknowledge the support by the Ministry of National Defense of Poland (GBMON/13-995/2018/WAT), Military University of Technology (Grant no. 23-895).

This paper characterizes the problem of matching masks that are part of individual means of
protection against contamination. The method of matching masks in the Polish Armed Forces with the
use of irritating chemical agents such as chloropicrin and CS was analyzed. The paper presents the results
of tests on the matching of modern filtering masks using the optoelectronic method during long-term
use. They were analyzed and compared with the results of the reference method ‒ total internal leakage.
Keywords: defense against weapons of mass destruction, individual protective equipment, fitting filter masks

Today, recources of detecting optical and optoelectronic devices become an integral part of modern weapons, as they provide information on thepresence of surveillance by the opposite party, and most importantly allow to determine the exact location of surveillance, weapons and equipment containing them in itself, which will undoubtedly increase the likelihood of their defeat by fire. It is clear that the world's leading countries have such weapons and improve them. Thus, almost all recent military conflicts have been characterized by the presence of such devices as: laser optical countermeasures. The use of similar means by pro-Russian militants in the east of our state is no exception. Thus, in the course of the investigation it was noted that one of the main unmasking features of optical and optoelectronic devices is the light reflection of the optical system, which can be estimated by the light reflection index, light reflectance coefficient, the luminous intensity index, directional light reflection characteristic. It was evaluated the influence of such a characteristic as the indicator of light reflection on the detection range of optical surveillance devices, which is in the service of border units. In the conditions of application by the enemy of laser devices of optical countermeasures, one of the requirements put forward to the optical devices which are made (purchased) for needs of border guard service are optical devices with a low indicator of light reflection index. If the light reflection index is not high enough or due to the laser location in the pulsed mode with increased radiation power of the laser optical device, possible options of reducing the reflection index are using of special apertures and limiting the spectral range of the lens by using IR-Cut filters. ; Засоби, які забезпечують виявлення оптичних та оптикоелектронних приладів, стають невід'ємною складовою сучасного озброєння, оскільки вони надають інформацію щодо наявності спостереження протилежною стороною, а найголовніше дозволяють ...

We study the effect of Cu incorporation on the morphological evolution and the optoelectronic properties of thin Ag films deposited by magnetron sputtering on weakly-interacting SiO2 substrates. In situ and real time spectroscopic ellipsometry data show that by adding up to 4at.% Cu throughout the entire film deposition process, wetting of the substrate by the metal layer is promoted, as evidenced by a decrease of the thickness at which the film becomes continuous from 19.5nm (pure Ag) to 15nm (Ag96Cu4). The in situ data are consistent with ex situ x-ray reflectometry analyses which show that Cu-containing films exhibit a root mean square roughness of 1.3nm compared to the value 1.8nm for pure Ag films, i.e., Cu leads to smoother film surfaces. These morphological changes are coupled with an increase in continuous-layer electrical resistivity from 1.0×10-5Ωcm (Ag) to 1.25×10-5Ωcm (Ag96Cu4). Scanning electron microscopic studies of discontinuous layers reveal that the presence of Cu at the film growth front promotes smooth surfaces (as compared to pure Ag films) by hindering the rate of island coalescence. To further understand the effect of Cu on film growth and electrical properties, in a second set of experiments, we deploy Cu with high temporal precision to target specific film-formation stages. The results show that longer presence of Cu in the vapor flux and the film growth front promote flat morphology. However, both a flat surface and a continuous-layer electrical resistivity that is equal to that of pure Ag films can only be achieved when Cu is deployed during the first 2.4nm of film deposition, during which morphological evolution is, primarily, governed by island coalescence. Our overall results highlight potential pathways for fabricating high-quality multifunctional metal contacts in a wide range of optoelectronic devices based on weakly-interacting oxides and van der Waals materials. ; Funding agencies: The French Government program "Investissements d'Aveni"r (LABEX INTERACTIFS, reference ANR-11-LABX-0017-01), Linköping University ("LiU Career Contract, Dnr-LiU-2015-01510, 2015-2020"), The Swedish research council (contract VR-2015-04630), The ÅForsk foundation (contracts ÅF 19-137 and ÅF 19-746), The Olle Engkvist foundation (contract SOEB 190-312), The Wenner-Gren foundations (contracts UPD2018-0071 and UPD2019-0007)

A three-dimensional (3D) topological insulator (TI) is a unique quantum phase of matter with exotic physical properties and promising spintronic applications. However, surface spin current in a common 3D TI remains difficult to control and the out-of-plane spin texture is largely unexplored. Here, by means of surface spin photocurrent in Bi2Te3 TI devices driven by circular polarized light, we identify the subtle effect of the spin texture of the topological surface state including the hexagonal warping term on the surface current. By exploring the out-of-plane spin texture, we demonstrate spin injection from GaAs to TI and its significant contribution to the surface current, which can be manipulated by an external magnetic field. These discoveries pave the way to not only intriguing new physics but also enriched spin functionalities by integrating TI with conventional semiconductors, such that spin-enabled optoelectronic devices may be fabricated in such hybrid structures. ; Funding Agencies|Linkoping University; Swedish Research Council [621-2011-4254, 2016-05091]; Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University [2009-00971]; Swedish Foundation for Strategic Research [EM11-0002]; Key Program of Natural Science Foundation of China [61334004]; Creative Research Group Project of Natural Science Foundation of China [61321492]; Natural Science Foundation of China [61404153]; Shanghai Pujiang Program [14PJ1410600]

Magnesium hydroxide [Mg(OH)2] has a layered brucitelike structure in its bulk form and was recently isolated as a new member of two-dimensional monolayer materials. We investigated the electronic and optical properties of monolayer crystals of Mg(OH)2 and WS2 and their possible heterobilayer structure by means of first-principles calculations. It was found that both monolayers of Mg(OH)2 and WS2 are direct-gap semiconductors and these two monolayers form a typical van der Waals heterostructure with a weak interlayer interaction and a type-II band alignment with a staggered gap that spatially separates electrons and holes. We also showed that an out-of-plane electric field induces a transition from a staggered to a straddling-type heterojunction. Moreover, by solving the Bethe-Salpeter equation on top of single-shot G0W0 calculations, we show that the low-energy spectrum of the heterobilayer is dominated by the intralyer excitons of the WS2 monolayer. Because of the staggered interfacial gap and the field-tunable energy-band structure, the Mg(OH)2-WS2 heterobilayer can become an important candidate for various optoelectronic device applications in nanoscale. ; Flemish Science Foundation (FWO-Vl); Methusalem foundation of the Flemish government; FWOPegasus Long Marie Curie Fellowship; TUBITAK (114F397); Science Academy, Turkey, under BAGEP program

PUBLISHED ; Transparent conductive oxides (TCOs) are important materials for a wide range of optoelectronic devices. Amorphous zinc tin oxide (a-ZTO) is a TCO and one of the best nontoxic, low-cost replacements for more expensive amorphous indium-gallium-zinc oxide. Here, we employ spray pyrolysis (SP), an inexpensive and versatile chemical vapor deposition-based technique, to synthesize a-ZTO with an as-deposited conductivity of ≈300 S/cm—the highest value hitherto among the reported solution-processed films. Compositional analysis via X-ray photoelectron spectroscopy reveals a nonstoichiometric transfer of Zn and Sn from the dissolved precursors into the film, with the best electrical properties achieved at a film composition of xfilm = 0.38 ± 0.04 ((ZnO)x(SnO2)1–x (0 < x < 1)). The morphology of these films is compared to films synthesized by physical vapor deposition (PVD), and a strong correlation between morphology and electrical properties is revealed. The granular nature of the SP-grown films, which seems like a drawback at first glance, brings about the prospect of using a-ZTO in ink-jet-printed films from a nanoparticle suspension for the room-temperature deposition. Brief post-anneal cycles in N2 gas improve the conductivity of the films by means of grain boundary (GB) passivation. ; This work was supported by Science Foundation Ireland [grant number 12/IA/1264], Irish Research Council Laureate Award [grant number IRCLA/2019/171]. A.Z. and K.Z. would like to thank the Government of Republic of Kazakhstan under the Bolashak program for a PhD funding.

Perylene bisimides (PBIs) are n-type semiconducting and photogenerating materials widely used in a variety of optoelectronic devices. Particularly interesting are PBIs that are simultaneously water-soluble and liquid-crystalline (PBI-W+LC) and, thus, attractive for the development of high-performing easily processable applications in biology and "green" organic electronics. In this work, singular temperatures connected to charge transport mechanism transitions in a PBI-W+LC derivative are determined with high accuracy by means of temperature-dependent photocurrent studies. These singular temperatures include not only the ones observed at 60 and 110 °C, corresponding to phase transition temperatures from crystalline to liquid-crystalline (LC) and from LC to the isotropic phase, respectively, as confirmed by differential scanning calorimetry (DSC), but also a transition at 45 °C, not observed by DSC. By analyzing the photocurrent dependence simultaneously on temperature and on light intensity, this transition is interpreted as a change from monomolecular to bimolecular recombination. These results might be useful for other semiconducting photogenerating materials, not necessarily PBIs or even organic semiconductors, which also show transport behavior changes at singular temperatures not connected with structural or phase transitions. ; We appreciate support from the Spanish government (MINECO) and the European Community (FEDER) through Grant MAT-2011-28167-C02-01, as well as the University of Alicante. We gratefully acknowledge financial support from MINECO (MAT2014-52305-P) and the UCM-BSCH joint project (GR3/14-910759). A. de la Peña thanks Universidad Complutense for a predoctoral fellowship.

Custom expertise of cultural values is caused by mass of imported and exported cultural heritage. This publication is devoted to the specific issues related to the technical and methodological support of customs expertise in the organization of work with prints (graphic art). Print is one of the most democratic art forms and often becomes the object of customs expertise. To solve expert problems, it is necessary to develop a holistic methodology. Optoelectronic methods of research for customs purposes with the availability of special training, practical experience and developed methodological base can provide exhaustive answers to questions about the technique of prints, the state of its preservation, the possibility of counterfeiting and the time of its creation. Dating is established during the examination of prints. Literate dating is impossible without the definition of technology, region of origin, etc. When attributing (determining the place of creation, the region, the identification of the master), it becomes necessary to carefully study the technique of making the work, as well as to identify possible falsification (in some cases). To form a reliable conclusion, the main and only acceptable is to recognize microscopy (research with the help of multiple magnification), which belongs to the group of optical and optoelectronic methods. A customs expert working with prints should have the skills of an expert combining an art critic and a criminalist. Also taking into account the fact that the examination of cultural property in customs authorities is a new direction where the number of art historians is small, the problem of practical provision and preparation of simple recommendations and control over their implementation is acute.This article considers the algorithm of working with a print, the technical means used and some examples from practice. ; Экспертиза культурных ценностей, проводимая таможенными органами, связана со значительным объемом ввозимых и вывозимых объектов культурного наследия. Данная публикация посвящена обозначению круга специфических вопросов, связанных с техническим и методическим обеспечением таможенной экспертной деятельности при организации работы с эстампами, то есть произведениями графики. Эстамп является одним из наиболее демократичных видов искусства и часто становится объектом таможенной экспертизы. Для решения экспертных задач в отношении эстампа необходима разработка целостной методики. Оптико-электронные методы исследования для таможенных целей при наличии специальной подготовки, практического опыта и разработанной методической базы могут дать исчерпывающие ответы на вопросы о технике эстампа, состоянии его сохранности, возможности подделки и о времени его создания. Датировка устанавливается в процессе проведения экспертизы эстампов. Грамотная датировка невозможна без определения техники, региона происхождения и т.д. При атрибуции возникает необходимость в тщательном изучении техники изготовления произведения, а также в выявлении возможной подделки. Для формирования достоверного вывода основным и единственно допустимым стоит признать микроскопию (исследование с помощью многократного увеличения), которая относится к группе оптических и оптико-электронных методов. Таможенный эксперт, работающий с эстампами, должен иметь навыки эксперта, сочетающего в себе искусствоведа и криминалиста. Также учитывая то, что экспертиза культурных ценностей в таможенных органах – это новое направление, где количество искусствоведов невелико, остро стоит задача практического обеспечения и подготовки простых рекомендаций и контроль их реализации. В статье рассмотрен алгоритм работы с эстампом, применяемые технические средства, а также приведены примеры из практики.