The invention relates to an imaging system and a method for three-dimensional imaging of the interior of an object. The imaging system comprises illumination means (10), detection means (11) and reconstruction means. The illumination means is adapted to illuminate the interior of the object with light, wherein the illumination means (10) is capable of generating different spatial light intensity distributions on the interior of the object. The detection means (11) is adapted to detect the different spatial light intensity distributions, and the reconstruction means is adapted to reconstruct a three-dimensional image from the detected different spatial light intensity distributions. The invention relates further to an optical fiber system comprising a transfer mechanism to transfer the optical fiber system from a first condition, in which optical fibers diverge from each other, to a second condition, in which optical fibers are parallel to each other, and vice versa.
