[en] We describe a method for calculation of the efficiency of detection and identification of charged particles by a telescope composed of three silicon semiconductor detectors. The calculation is based on modeling the charged particles (e.g. nucleus of hydrogen and helium isotopes) passage through the detector matter taking into account the ionization loss fluctuations and multiple Coulomb scattering. Calculations are done for a telescope composed of detectors with equal radii of sensitive surface (8 mm). The considered telescope has a high efficiency and an admissible separation by mass and charge of detected particles. The developed algorithm may be applied for calculation of telescopes with a more complicated configuration, containing up to 10 detectors differing in diameter, thickness and distance between them