[en] Rectifying photosensitive n-Ox/n-InSe heterojunctions, where n-Ox is native oxide of InSe, are obtained by the thermal treatment of the n-InSe crystals in air. The spectra of the relative quantum efficiency of the originally obtained heterojunctions are investigated in natural and linearly polarized radiation. It is shown that the heterojunctions obtained manifest broad-band photosensitivity, and photopleochroism emerges under oblique incidence of the linearly polarized radiation. The nature of the photopleochroism revealed is discussed. It is concluded that the isotype Ox/InSe structures can be used as photoconverters of natural and linearly polarized radiation