[en] Stereoscopic registration of particles in a streamer chamber by means of a pulsed nitrogen laser is described. Helium streamer chamber with a shadow optical device is used in the experiments. The application of a spherical mirror allows one to derive information about track space position by a single photograph only. Special advantages of this new technique as compared to the common photographing are considered. Details of designing the optical device are discussed, and the optimization of the set-up taking into account the astigmatic aberration supperession is presented