Fabrication of radial DOEs with quantized relief by two-photon polymerization technique

The present work is devoted to the realization of binary (two-level) as well as 4-level diffractive microrelief of radial DOE´s using the 2PP-technique. These DOE´s can be applied for the generation of any desired longitudinal intensity distributions (coaxial lines, sets of sequential axial focuses, etc.) required for many laser technologies. As important examples the following applications can be mentioned: laser alignment of different units at large distances, formation of images from extended or moving objects, which is also required for medicine, nondestructive investigations of materials and devices, laser scanning and interferometry, as well as, the fabrication of intraocular lenses.