Global Patent Index - EP 1161674 A1

EP 1161674 A1 2001-12-12 - 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

EP 1161674 A1 (EN)

Application

EP 00921336 A

Priority

  • US 0004302 W
  • US 12085899 P
  • US 12085799 P

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 (main, further and additional classification)

G01N 21/00; G01J 4/00; G01N 1/10

IPC 8 full level (invention and additional information)

G01N 15/02 (2006.01); G01N 15/06 (2006.01); G01N 33/04 (2006.01); G01N 33/06 (2006.01)

CPC (invention and additional information)

G01N 33/04 (2013.01); G01N 15/0205 (2013.01); G01N 15/06 (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

EPO simple patent family

WO 0049390 A1 20000824; AT 417262 T 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

INPADOC legal status


2002-01-02 [18W] WITHDRAWN

- Date of withdrawal: 20011026

2001-12-12 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20010910

2001-12-12 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2001-12-12 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Free text: AL;LT;LV;MK;RO;SI