Achromatic Cascade Optical System with Hybrid Lenses for Distortion-compensated Multifocusing of Ultrashort Pulse Beams Topics: Applied Industrial Optics; Ultrafast Electronics, Photonics and Optoelectronics In Proceedings of the 7th International Conference on Photonics, Optics and Laser Technology PHOTOPTICS - Volume 1, 241-247, 2019 , Prague, Czech Republic