Physical-Technical Institute  
220141 Minsk, Kuprevicha St.,10

Technology for obtaining protective and antireflection coatings for thermal imaging equipment










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Palina Zharkouskaya
+375 17 272 9628
Physical-Technical Institute offers consumers a technology for obtaining protective and antireflection coatings for thermal imaging equipment under a commercial agreement with technical assistance or a license agreement and is looking for partners to conclude a technical cooperation agreement.
The intensive development of thermal imaging technology and the wide possibilities for its use in various industries, medicine, the Ministry of Emergency Situations and military equipment require the creation of new materials, including thin-film materials that combine high optical and mechanical properties.

An experimental technology has been developed for obtaining fluorine-containing diamond-like coatings (DLC) with a thickness of 1.2 μm on aspherical lenses made of germanium, intended for photodetectors of thermal imaging equipment in the wavelength range of 8–12 μm.

Coatings are formed on the lens surface using the combined PVD-CVD method, designed to increase the transmission of infrared radiation in the range of 8-12 microns and protect the lens surface from adverse environmental factors.
Coatings are characterized by high hardness and abrasion resistance. They provide an average infrared transmittance of 97%.

Coating thickness, µm
 Unevenness coatings in thickness for a spherical lens with a diameter of 52 mm, radius curvature of 54.3 mm and an aspherical lens with a diameter of 37 mm, mm no more than 4
 Average display over the wavelength range 8-12 µm, % no more than 2
 Refractive index 2.2-2.5
 Transmission of infrared radiation with one-sided coating of the lens, % 63
 Coating adhesion (scratch testing) over 12 N and exceeds germanium adhesion 

The theoretical significance of the study is to establish the regularities of the interaction of the plasma of a pulsed cathode-arc discharge with tetrofluoroethane vapor and the synthesis of diamond-like carbon thin-film materials with the inclusion of fluorine, which provides a refractive index close to the optimal value for effective enlightenment, as well as a low surface energy to reduce the sorption of moisture and drops salt fog, increase the abrasion resistance of the lens surface.
Advantages and Innovations
The dependences of the rate and uniformity of coating deposition on the conditions of cathode-arc deposition, the formation of types of chemical bonds between carbon and fluorine atoms and their influence on hardness, friction coefficient, the value of the polar and dispersed components of surface energy, and the edge of the fundamental light absorption band are established. Plasma-chemical synthesis of two-component DLC coatings from secondary plasma, which is formed during the interaction of plasma of a high-intensity pulsed cathode-arc discharge with vapors of tetrafluoroethane - refrigerant R143a, which does not adversely affect the environment, has been implemented.

- high transmission capacity of lenses in the mid-IR wavelength range;
- precise setting of the required refractive index, including the gradient in thickness;
- high uniformity of drawing;
- protection of the outer side from mechanical damage and aggressive atmosphere.
Stage of development
Field tested/evaluated (TRL8)
Funding source
State budged
IPR status
Exclusive rights
Secret know-how
Sector group
Aeronautics, Space and Dual-Use Technologies
Maritime Industry and Services

Client information

R&D institution
Year established
NACE keywords
C.25.50 - Forging, pressing, stamping and roll-forming of metal; powder metallurgy
C.25.61 - Treatment and coating of metals
M.72.19 - Other research and experimental development on natural sciences and engineering
M.74.90 - Other professional, scientific and technical activities n.e.c.
Turnover (in EUR)
Already engaged in transnational cooperation
Additional comments
Physical-Technical Institute develops materials processing technologies using laser, ion and electron beams, plasma flows, high pressures and electromagnetic fields, as well as new multifunctional materials and coatings with improved characteristics for mechanical engineering, tool production, microelectronics, medicine, etc. The Institute is actively developing technologies and equipment that are used in manufacturing of products.

Coatings, deposition technologies and equipment:
- protective coatings for protection the parts fr om corrosion in various aggressive environments, as wel as at high temperatures;
- protective and decorative coatings for decoration of parts with simultaneous protection fr om corrosion;
- special coatingsapplied to confer special properties (wear resistance, hardness, electrical insulating, magnetic properties, etc.), as well as the restoration of worn parts.

Casting technologies.
Casting production is a field of mechanical engineering wich formed parts and billets by pouring by the molten metal intothe moulds wh ere their have the congiguration of reuired parts. In the casting process, metal solidifies in the mould during the cooling process obtaining a casting mold - finished part or a billet which can can be mechanically treated if it is necessary (increase of dimension accuracy and roughness reduction). In this respect, the casting production has the task to obtain casting moulds wh ere the dimension and the shape ar as possible to dimension and the shape of finished part.

Industrial technologies of surface engineering.
Surface engineering combines methods for directional changes of physical and chemical properties of the manerial surface layers by deformation, midification, deposition of films, coatings, protective layer using various combined methods.
- ion thermochemical treatment;
- laser treatment of materials;
- nitrocarburising;
- induction heating;
- magnetic-pulse treatment and etc.

New materials.
New materials are composite materials such as carbon fiber reinforced plastic, glass-fiberreinforced plastic, basalt plastics, aramid plastics and metal composites, high-tech ceramics - aluminum, zirconia, oxide, nitride, carbide ceramics and others, new construction materials - new insulating materials from foam glass, modifying agenrs of roadway surfacing based on rubber powder or polymer fibers, new concrete rypes. The application range of new materials is the widest - space and aircraft industry, construction engineering, medicine, protection and safety..

Metal working.
Technologies implies changing the shapes and dimensions of billets due to the effect of applied forces with a subsequenr result saving. The shape and dimension of the product do not change after the pressure loss. In order to increase the practicity, metal as heated to the specific temperature before thq beginning of the treatment/ The temperature is determined individually for each type of the material depending on its specific physical and chemical characteristics.

Cooperation has been established with various organizations in Vietnam, Egypt, Kazakhstan, China, Korea, Latvia, Lithuania, Poland, Russia, Slovakia, Uzbekistan, Ukraine, the Czech Republic and other countries in the field of metal processing technologies and the creation of protective coatings.
Languages spoken

Information about partnership

Type of partnership considered
Commercial agreement with technical assistance
License agreement
Technical cooperation agreement
Type and role of partner sought
Consumers interested in purchasing technology for obtaining protective and antireflection coatings for thermal imaging equipment under a commercial agreement with technical assistance or a license agreement.

Partners interested in the development of technology for obtaining protective and antireflection coatings for thermal imaging equipment under a technical cooperation agreement.
Type and size of partner sought
SME 51-250
SME 11-50
SME <= 10
R&D Institution
Sole proprietor


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