Purpose:
- A visual demonstration and the possibility of investigating certain types of aberrations for educational and research purposes as part of a training set of holographic optical elements.
- Transformation of geometric wave fronts.

Benefits:
- The training set on physics, optics and holography has no analogues both in Russia and abroad.

"Aberrant" synthesized hologram lens (SGL),
cylindrical SGL,
SGL-tor,
synthesized hologram simulator (SGI) of spherical aberrations of the 3rd and 5th orders,
GIS of 5th order spherical aberrations,
GIS of Sinusoidal Aberrations
(for all elements of this set, the light diameter is 35 mm, the working wavelength is 633 nm and the diffraction efficiency is ~ 40%).