With the present invention, there is provided a data transmission system for transmitting an electrical data to a target, and a data receiving system for receiving an electrical data from a target. Said data transmission system comprises at least two phototransistor crystals (T), each of which is stimulated by light (I), to form an electrical signal an image source (4) which allows the light (I) to be sent to said phototransistor crystals (T) and allows controlling the amount of light (I) transmitted to each phototransistor crystal (T) independently of each other and at least one control unit which is connected to said image source (4) and controls the amount of light (I) transmitted from the image source (4) to each of the phototransistor crystals (T). Said data receiving system comprises at least two light crystals (P), each of which is connected to a target and emits light (I) by means of an electric signal received from the corresponding target an image sensor (14) for detecting the light emitted by each light crystal (P) independently of each other and a control unit to which said image sensor (14) is connected and to which the image generated by the image sensor (14) is transmitted.
