INFRARED LINK

It is possible to create a two channel data transfer system using an infrared link according to the invention. It is possible by utilizing it to transfer data between two terminal devices (10, 20, 50, 60) simultaneously to both directions (full duplex), or to establish a two-channel data transfer connection between two terminal devices (30, 40, 70, 80). An infrared link according to the invention is realized using linearly polarized infrared light (LV, LH). In it a data transfer channel formed using an infrared connection is divided into two separate channels using e.g. polarizers (V1, V2, H1, H2) or beam splitters (BS1, BS2). In this case, when data is transferred between two terminal devices (10, 20, 30, 40, 50, 60, 70, 80), the data transfer to one direction is realized e.g. using vertically polarized infrared light (LV), and correspondingly to the other direction using horizontally polarized infrared light (LH).