EP 1161674 A1 20011212 - BREWSTER ANGLE LIGHT SCATTERING CELL
Title (en)
BREWSTER ANGLE LIGHT SCATTERING CELL
Title (de)
ZELLE ZUR LICHTSTREUUNG UNTER DEM BREWSTERWINKEL
Title (fr)
CELLULE A DIFFUSION DE LUMIERE SOUS UN ANGLE DE BREWSTER
Publication
Application
Priority
- US 0004302 W 20000218
- US 12085899 P 19990219
- US 12085799 P 19990219
Abstract (en)
[origin: WO0049390A1] Methods and apparatus are provided for measuring component concentration in a liquid containing relatively large particles and relatively small particles. The invention may be utilized for measuring fat and casein concentrations in a dairy product, but is not limited to such use. A polarized light beam (112) is directed through a scattering cell (120) having first and second windows (122, 124) and containing a sample of the liquid. A normal to an exterior surface of the second window (124) of the scattering cell (120) is at or near Brewster's angle with respect to the light beam (112) to reduce or eliminate reflections. A first light detector, positioned at an angle of about 5 degree to about 45 degree with respect to the light beam, detects scattered light from a first component of the liquid, such as fat particles. A second light detector, positioned at an angle of about 130 degree to about 160 degree with respect to the light beam, detects scattered light from a second component of the liquid, such as casein particles. When the liquid is a dairy product, the detector signals are representative of fat and casein concentrations. Component concentrations of a dairy product may be measured without requiring the use of a chemical diluent.
IPC 1-7
IPC 8 full level
G01N 15/02 (2006.01); G01N 15/06 (2006.01); G01N 33/04 (2006.01); G01N 33/06 (2006.01)
CPC (source: EP)
G01N 15/0205 (2013.01); G01N 15/06 (2013.01); G01N 33/04 (2013.01); G01N 33/06 (2013.01); G01N 2015/0687 (2013.01)
Citation (search report)
See references of WO 0049390A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 0049390 A1 20000824; AT E417262 T1 20081215; AU 3495100 A 20000904; AU 4167700 A 20000904; AU 776883 B2 20040923; DE 60041040 D1 20090122; DK 1161670 T3 20090330; EP 1161670 A1 20011212; EP 1161670 A4 20041110; EP 1161670 B1 20081210; EP 1161674 A1 20011212; WO 0049388 A1 20000824
DOCDB simple family (application)
US 0004302 W 20000218; AT 00913516 T 20000218; AU 3495100 A 20000218; AU 4167700 A 20000218; DE 60041040 T 20000218; DK 00913516 T 20000218; EP 00913516 A 20000218; EP 00921336 A 20000218; US 0004177 W 20000218