System and method for determining characteristics of an object or a sample

The invention relates to a system and a method for determining characteristics of an object or a sample, the system comprising: at least a first and a second transmitter unit (11, 12), wherein the first transmitter (11) unit is configured for transmitting first electromagnetic waves (T1) towards the object (2) and the second transmitter (12) unit is configured for transmitting second electromagnetic waves (T2) towards the object (2); at least one receiver unit (13) for receiving electromagnetic waves from the object (2), the receiver unit (13) generating a receiver signal upon receipt of the electromagnetic waves from the object (2), wherein the first and the second transmitter unit (11, 12) is configured in such a way that the first and the second electromagnetic waves (T1, T2) are modulated differently in such a way that by demodulating the receiver signal, a portion of the receiver signal evoked by the first electromagnetic waves (T1) can be separated from a portion of the receiver signal evoked by the second electromagnetic waves (T2), and/or the first and the second transmitter unit (11, 12) is configured in such a way that at the same point in time the frequency of the first electromagnetic waves (T1) is different from the frequency of the second electromagnetic waves (T2) such that a portion of the receiver signal evoked by the first electromagnetic waves (T1) can be separated from a portion of the receiver signal evoked by the second electromagnetic waves (T2).