A two element holographic lens is proposed for obtaining high efficiency in a holographic lens. The two element holographic lens is made up of an off-axis holographic lens and a plane holographic grating. The proposed holographic lens can be used for the correction of chromatic aberration in an achromatic doublet. The theory of the holographic lens and the V-value of the holographic lens are given. The formulae for longitudinal chromatic aberration, transverse chromatic aberration present in a simple holographic lens and a two element holographic lens are derived. It is observed that the expressions for longitudinal chromatic aberration is the same for both the conventional holographic lens and the two element holographic lens proposed in this paper. It is also observed that the expression for the transverse chromatic aberration is the same for both the conventional holographic lens and the two element holographic lens. The two element holographic lens may find application for designing large size achromatic doublet in combination with a glass lens for magnifying purpose.