■ FOURIER AND REVERSE FOURIER OPTICAL SYSTEM
The Bettersizer 2600 is superior in the combination of Fourier and inverse Fourier design. This smart design allows, on the one hand, the detection of stray light in a very wide angular range from 0.016° to 165°. On the other hand, in contrast to the inverse Fourier design, the particles do not have to lie on one plane – the simultaneously accurate measurement of small and large particles is therefore achieved.