Miniaturowy wyświetlacz obrazu termowizyjnego

W artykule przedstawiono miniaturowy wyświetlacz o rozdzielczości 852x600 przeznaczony do kamer termowizyjnych. Układ optyczny składa się z trzech soczewek. Wykonano obliczenia aberracyjne. Aberracje typowe dla układów obserwacyjnych czyli krzywizna pola (<1mm) i dystorsja (<2%) są akceptowalne. Możliwa jest zmiana parametrów wyświetlania kontrastu i nasycenia. Wykonano dwie wersje przyrządu. Pierwsza dedykowana do celownika CTS-1, zasilana z celownika. Druga z własnym zasilaniem - autonomiczna.

The paper presents a miniature, external display device for thermal cameras. It is built on an OLED panel of 852x600 pixels. The optical system consists of three lenses (Fig.3). The unwanted effect of user's face illumination was investigated. The results of calculations of aberrations carried out with the ZEMAX software are included. The typical aberrations as well as the field curvature and distortions achieved an acceptable level (Fig. 4). The sufficient resolution was obtained for intended applications of the presented device (Fig. 5). The ±2 D diopter adjustment is provided. The display is controlled by a microprocessor circuit which also controls the simple user and serial communication interface. The durable casing was designed to provide adequate protection against electromagnetic interference. There are two versions of microdisplay. One, intended to enhance the capabilities of CTS-1 thermal weapon sight, drives the power from it. The second, a standalone device can display video signals from various thermal cameras and has its own Li-Ion battery. The operating temperature range is from -20ºC to +60ºC. The basic technical specifications are presented in Table 1.