FRITSCH technology: Reverse Fourier design

35 years ago, FRITSCH was the first company in the industry to bring a revolutionary alternative to the conventional design onto the market in the form of laser diffraction in a convergent laser beam: By positioning the Fourier lens in front of the measuring cell, a convergent laser beam passes through the measuring cell. The scattered light is focused directly on the detector without additional optical elements. This design is now in widespread use and can be designed so that a main detector can be used to capture small scattering angles for measuring larger particles. For the large scattering angles of the small particles, a suitable detector system then needs to be integrated for the sideward and backward scattering.