Compensating optical systems. Part 1: broadband holographic reconstruction.

The primary chromatic aberrations of a reconstructed holographic image can be compensated by a dispersive lens placed at the quasi-achromatic (QA) point of a hologram. The conditions for obtaining this compensation are derived. Three experimental systems that employ this compensation are discussed. Two of these are in line and use either a zone plate lens or flint glass lens as the dispersive element centered at the QA point. In the third system, an off-axis hologram is followed by an off-axis zone plate lens positioned at the offset QA point.