On October 16, 2020, a meeting of the Department of Nanometrology was held, at which representatives of the Department of Optics and Photonics of the Faculty of Faculty of Fundamental Problems of Technology talked about their research. PhD Eng. Sławomir Drobczyński introduced us to the history and construction of optical tweezers, while MSc. Eng Weronika Lamperska described the secrets of two-photon lithography and the construction of microtools produced with the technique. Thank you for your interesting speeches and we hope for further cooperation with Professor Jan Masajada's group.