SINGLE-ZONE-PLATE ACHROMATIC FRESNEL-TRANSFORM SETUP - PATTERN TUNABILITY

White-light point-source illumination results in the chromatic blurrin g of the optical field diffracted by an aperture. In this paper, broad band dispersion compensation for a continuous set of Fresnel diffracti on patterns associated with an arbitrary input transparency is carried out, in a sequential way, by means of a single on-axis blazed zone pl ate. The input is illuminated with a white-light converging spherical wavefront and the diffractive lens is inserted at the virtual source p lane, We recognize that the position of the input along the optical ax is permits to achieve a different achromatic Fresnel diffraction patte rn with low residual chromatic aberrations. The theory derived here ca n be easily applied to allow the recording of different achromatic whi te-light self-images without changing the diffractive lens component, what is confirmed by our experimental results.