Abstract: It is disclosed a portable system for detecting an object at least partially hidden by a flame. The system comprises a first portable device comprising a fiber optic laser emitting an infrared radiation. The system also comprises a second portable device comprising a fiber optic splitter optically coupled to the fiber optic laser and an infrared detector. The fiber optic splitter divides the infrared radiation into an object beam and a reference beam, directs the object beam onto the object to be detected and directs the reference beam onto the infrared detector. The infrared detector detects a hologram formed by the reference beam interfering with the object beam scattered by the object. The system further comprises a data processing unit which reconstructs images of the object by numerically processing the hologram, and a display which visualizes the reconstructed images.