Destruction of the image of the Pendry lens during detection

The energy transfer through the Pendry lens is considered. It is demonstrated that part of energy transmitted by evanescent waves is totally determined by losses and causes a phase shift between the evanescent waves forming source and image fields. In case of a lens made of a material with negative permittivity, this phase shift depends on the wave number of the evanescent wave. This results in destructive interference of the evanescent waves forming the image and, as a consequence, in deterioration of the image. The role of losses in the lens and in detector is considered.