Aperture System for Multi-Angle Light Scattering Detectors
First Claim
1. Apparatus for measuring the light scattering properties of a sample in a liquid medium, wherein the liquid medium with the sample is illuminated by a laser beam (2) in a measuring cell (3) transversely to the direction of filling the liquid medium in the measuring cell or transversely to the flow direction of the liquid medium within the measuring cell (3), comprising a laser (1), a cylindrical measuring cell (3), a first inner aperture system (4), a second outer aperture system (5) and at least two detectors (6), whereinthe detectors (6) are arranged outside of the second outer aperture system (5) so that they collect the light scattered on the sample within set, different angle ranges,characterized in that the first inner aperture system (4) and the second outer aperture system (5) are formed and arranged circularly and concentrically around the axis of the measuring cell (3).
1 Assignment
0 Petitions
Accused Products
Abstract
An apparatus for measuring the light scattering properties of a sample in a liquid medium, wherein the liquid medium with the sample is illuminated by a laser beam in a measuring cell transversely to the direction of filling the liquid medium in the measuring cell or transversely to the flow direction of the liquid medium within the measuring cell, comprising a laser, a cylindrical measuring cell, a first inner aperture system, a second outer aperture system and at least two detectors, wherein the detectors are arranged outside of the second outer aperture system so that they collect the light scattered on the sample within set, different angle ranges, wherein the first inner aperture system and the second outer aperture system are formed and arranged circularly and concentrically around the axis of the measuring cell. Use of the apparatus and a method that makes use of the apparatus are also disclosed.
-
Citations
15 Claims
-
1. Apparatus for measuring the light scattering properties of a sample in a liquid medium, wherein the liquid medium with the sample is illuminated by a laser beam (2) in a measuring cell (3) transversely to the direction of filling the liquid medium in the measuring cell or transversely to the flow direction of the liquid medium within the measuring cell (3), comprising a laser (1), a cylindrical measuring cell (3), a first inner aperture system (4), a second outer aperture system (5) and at least two detectors (6), wherein
the detectors (6) are arranged outside of the second outer aperture system (5) so that they collect the light scattered on the sample within set, different angle ranges, characterized in that the first inner aperture system (4) and the second outer aperture system (5) are formed and arranged circularly and concentrically around the axis of the measuring cell (3).
-
10. A method for measuring the light scattered on a sample located within a liquid medium, comprising the following steps:
-
a) introducing the liquid medium that contains the sample into a cylindrical measuring cell (3), b) illuminating the sample located within the measuring cell (3) transversely to the direction of filling the liquid medium in the measuring cell or transversely to the flow direction of the liquid medium within the measuring cell (3) with a laser beam (2), and c) detecting the resulting scattered light beams (7) with at least two detectors (6) arranged circularly and concentrically around the measuring cell (3) which collect the light scattered on the sample within set, different angle ranges, characterized in that the detectors are shielded from scattered light beams, which do not come within the respectively set angle ranges, and remissions by a first inner aperture system (4) and a second outer aperture system (5) which are formed and arranged circularly and concentrically around the axis of the measuring cell (3). - View Dependent Claims (11)
-
Specification