Laboratory measurements and T-matrix calculations of the scattering matrixof rutile particles in water

We present experimentally determined scattering matrix elements of birefrin gent rutile particles in water as a function of the scattering angle for a wavelength of 633 nm (in air). These elements are compared with the results of T-matrix calculations for prolate spheroids. For the diagonal matrix el ements the results of the T-matrix calculations are in good agreement with those of the measurements. A good fit for the whole matrix, including the o ff-diagonal elements, is obtained when we compensate for the birefringence of the rutile particles by performing the computations for spheroids with a slightly larger length/width ratio than measured. (C) 1999 Optical Society of America. OCIS codes: 290.0290, 120.5410.