TY - JOUR N2 - In recent years, many scientific and industrial centres in the world developed virtual reality systems or laboratories. At present, among the most advanced virtual reality systems are CAVE-type (Cave Automatic Virtual Environment) installations. Such systems usually consist of four, five, or six projection screens arranged in the form of a closed or hemi-closed space. The basic task of such systems is to ensure the effect of user “immersion” in the surrounding environment. The effect of user “immersion” into virtual reality in such systems is largely dependent on optical properties of the system, especially on quality of projection of three-dimensional images. In this paper, techniques of projection of three-dimensional (3D) images in CAVE-type virtual reality systems are analysed. The requirements of these techniques for such virtual reality systems are outlined. Based on the results of measurements performed in a unique CAVE-type virtual reality laboratory equipped with two different 3D projection techniques, named Immersive 3D Visualization Lab (I3DVL), that was recently opened at the Gdańsk University of Technology, the stereoscopic parameters and colour gamut of Infitec and Active Stereo stereoscopic projection techniques are examined and discussed. The obtained results enable to estimate the projection system quality for application in CAVE-type virtual reality installations. L1 - http://journals.pan.pl/Content/110243/PDF/art_13.pdf L2 - http://journals.pan.pl/Content/110243 PY - 2019 IS - No 1 EP - 151 DO - 10.24425/mms.2019.126330 KW - virtual reality KW - projection systems KW - cave automatic virtual environment KW - Active Stereo projection KW - projection of spectrum separation KW - Immersive 3D Visualization Laboratory A1 - Mazikowski, Adam PB - Polish Academy of Sciences Committee on Metrology and Scientific Instrumentation VL - vol. 26 DA - 2019.04.01 T1 - Investigation of optical properties of infitec and active stereo stereoscopic techniques for CAVE-type virtual reality systems SP - 139 UR - http://journals.pan.pl/dlibra/publication/edition/110243 T2 - Metrology and Measurement Systems ER -