Leak detection system and method

A leak detection system (1) for detecting leaks in flexible packets is provided, comprising a test bed (3) which supports at least one packet (15) comprising at least one flexible portion, a pressure chamber (5) containing the test bed and the packet which applies a first pressure to the packet producing a first volume of the flexible portion of the packet and then applies a second pressure to the packet producing a second volume of the flexible portion of the packet, an illumination source (9) which produces structured illumination which is incident on the packet at the first pressure and the second pressure, an illumination detector (11) which captures illumination reflected from the packet at the first pressure and produces a first image dataset of the packet and which captures illumination reflected from the packet at the second pressure and produces a second image dataset of the packet, a processor (13) connected to the illumination detector to receive the first and second image datasets of the packet and which determines the first volume of the flexible portion of the packet at the first pressure, determines the second volume of the flexible portion of the packet at the second pressure, uses the first volume and the second volume to determine a change in volume of the flexible portion of the packet between the first and second pressures, compares the change of volume with a threshold and when the change of volume is greater than the threshold determines that the packet is leak-free and when the change of volume is less than the threshold determines that the packet has at least one leak.A method of detecting leaks in flexible packets is also provided.