BI-200SM Research Goniometer and Laser Light Scattering System

Description

Brookhaven Instruments' BI-200SM is a versatile goniometer system configured for sophisticated light scattering experiments. It functions as a foundational instrument for conducting both Static Light Scattering (SLS) and Dynamic Light Scattering (DLS) analyses, which are used to determine properties like molecular weight, radius of gyration, and particle size distribution. The system centers on a high-precision, motor-driven turntable that rotates the detector assembly with minimal wobble, ensuring accurate angular positioning critical for these measurements. The detector module includes an adjustable focusing achromat, a 200-micron slit, and a viewing eyepiece for aligning the sample. A key component is a filter turret that houses narrow bandpass optical filters for specific laser wavelengths (488, 514, 532, 633, and 637 nm) alongside a selection of pinhole apertures. Built on a standard optical rail, the system supports modular expansion with various optical accessories. An advanced configuration option allows for the addition of a second detector to perform cross-correlation DLS, which can reduce artifacts in measurements of concentrated or turbid samples.