The security systems of the wide area objects are dominated by fiber optic sensors, used primarily to perimeter protection as well as to the protection of vast objects such as pipelines. Critical infrastructure objects are not only industrial facilities but also the transmission lines. Authors present the sensor systems compared to sensors for extensive object security currently available on the market. The designed systems, such as double interferometer system as well as more and more popular QKD systems are sensors with distributed sensing field. These systems, described by authors in many publications, are excellent solutions for the protection of wide area infrastructural objects. Presented fiber sensors, besides sabotage detection also offer the possibility of locating the disturbance along many kilometers of the zone. The solution presented in this paper was designed to adapt well known solutions to the physical protection of the transmission line without interfering with the transmitted data. According to the knowledge of potential threats of fiber optic telecommunications, the authors present methods of protecting fiber optics telecommunication cable, and present their own solutions and describe their application possibilities.

This paper presents infrared sensor for eye tracking system for ophthalmology and truck drivers. System is based on camera and near infrared diode illuminator. We present test results of sensor detection at dierent operating parameters. Tests were chosen so as to see how the sensor behaves in dicult conditions, additionally tested whether long-term operation of the sensor has an impact on the examined person.

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Due to agricultural producers’ increasing awareness and the introduction of increasingly restrictive crop protection standards, producers have to use new technologies that are safer for consumers and the environment. In order to meet the requirements of these standards, it is necessary to take the physical properties of crops and agricultural raw materials (basic geometric parameters, shape factors, and equivalent spherical diameters) into account when designing machinery for the harvesting, transport, and processing of agricultural produce. When designing machinery, methods used for calculating the strength of the machine construction and the discrete element method (DEM) used in computer simulations of processes involving seeds or particles require the provision of the exact geometrical dimensions of particles and seeds. The aim of the study was to develop a universal method of measurement of the overall dimensions of granular material particles using a widely available application based on image analysis. The study presents the possibility of using a new method of measuring overall dimensions by means of the widely available ImageJ application on a specially designed test facility.

In this paper we demonstrate measurement results of the modalmetric fiber optic sensor used for the monitoring of the fiber optic link integrity to protect it against unauthorized access to classified information. The presented construction is based on the detection of changes of the modes distribution in a multimode fiber. Any mechanical stress on the multimode fiber causes changes of polarization and distribution of propagating modes, hence it changes the distribution of modes at the end of the multimode fiber. Observation of these changes using a narrow core single-mode fiber allows to use the structure as an optical fiber sensor. We used several kilometers long optical links to conduct field tests of laboratory sensor. On this basis the prototype module of modalmetric fiber optic sensor wasbuilt. The modification of optoelectronic part, the variation of sensor length and the change of the method of light reflection at the end of the fiber enable the use of the modalmetric fiber optic sensor in many applications. The sensor finds wide range of applications in security systems. It can be applied to protect the museum's collection, transmission lines and to protect objects of critical infrastructure.