Proprietary zoom optics with a square transmitting lens, offering the features of a round lens with a 20% greater diameter that can generate a much more intensive beam. This revolutionary optical system works with no visible moving parts and without movement of the front panel. The square transmitting lens offers a particular advantage for the manufacture of linear, square, or rectangular luminaires. This format helps to optimise the light output side and prevents lost space between the beams. (Patents FR1652938, FR1652944, WO2017/174902 & WO2017/191386)