SCATTERING-ANGLE CALIBRATION IN AN AUTOMATED SMALL-ANGLE LIGHT-SCATTERING APPARATUS

Quantitative analysis in the small-angle light scattering technique fo r crystalline polymer studies is facilitated by the incorporation of c harge-coupled detectors and image digitization and processing schemes which enable the intensity and angular dependence of scattered light t o be measured. This task, however, can only be successfully achieved i f a calibration procedure, where each pixel in the camera is related t o its respective scattering angle component, is first implemented. In this article, a rapid and convenient calibration procedure that uses t he diffraction pattern from a grating with a predetermined center-to-c enter distance is outlined. (C) 1996 John Wiley & Sons, Inc.