EN
The article describes life and works of of Andrzej Bączyński and his most important scientific and organizational achievements. In the description of his youth, attention was drawn to his first scientific interests concerning both industrial applications of physics and issues related to theoretical physics. His first scientific publication was devoted to investigating the possibility of using the famous instrument for integrating the Schrödinger equation – constructed at the Nicolaus Copernicus University by Kazimierz Antonowicz – for calculations on specific problems of atomic and molecular physics. In the following years, as a researcher at this University, he first dealt with experimental research in the field of molecular luminescence and then focused his attention on solid state physics. At that time, he played an important role in the development of the Industrial Institute of Electronics, initiating research in Toruń on photoelectric effects, which led to the development of photoresistor production technology. The most attention in the article is devoted to the works of Bączyński related to the construction of dye lasers. His team had significant achievements thanks to which it gained international recognition as a leading center in the field of laser physics and optoelectronics.