Global Patent Index - EP 1086365 A1

EP 1086365 A1 2001-03-28 - POLARIMETRIC METHOD FOR DETERMINING THE (MAIN-)OSCILLATION PLANE OF POLARISED LIGHT ON ABOUT 0.1 mo AND MINIATURISABLE DEVICE FOR ITS IMPLEMENTATION

Title (en)

POLARIMETRIC METHOD FOR DETERMINING THE (MAIN-)OSCILLATION PLANE OF POLARISED LIGHT ON ABOUT 0.1 mo AND MINIATURISABLE DEVICE FOR ITS IMPLEMENTATION

Title (de)

POLARIMETRISCHES VERFAHREN ZUR BESTIMMUNG DER (HAUPT-) SCHWINGUNGSEBENE POLARISIERTEN LICHTS AUF ETWA 0,1 mo UND MINIATURISIERBARE VORRICHTUNG ZU SEINER DURCHFÜHRUNG

Title (fr)

PROCEDE POLARIMETRIQUE POUR LA DETERMINATION DU PLAN D'OSCILLATION (PRINCIPAL) DE LA LUMIERE POLARISEE SUR ENVIRON 0,1 mo, ET DISPOSITIF MINIATURISABLE POUR SA MISE EN OEUVRE

Publication

EP 1086365 A1 (DE)

Application

EP 99929174 A

Priority

  • DE 19826294 A
  • EP 9904015 W

Abstract (en)

[origin: WO9966309A1] The invention relates to a method and a device for accurate determination of the oscillation plane of polarised light. According to said method, the light of a light source (1) is polarised by means of a polarisation filter (2) having an adjustment angle theta 0 determined relatively to the first reference plane, i.e. the incidence plane on the reflecting surface (4). The polarised beam (12) penetrates the object to be measured in the measuring chamber (3) and the rotation angle varies by a low angular value theta MG. The sum of theta 0 and theta MG is equal to the rotation angle theta e with which the beam (13) exiting the measuring chamber is partially reflected on the surface of an optically thicker medium (4). The partially reflected beam is then decomposed into two partial beams (15a: extraordinary beam, 15b: ordinary beam) in a polarisation prism (5) having a reference plane, i.e. the oscillation plane of the ordinary beam, with an adjustment angle ( theta *) determined relatively to the first reference plane, the two partial beams having oscillation planes which are exactly perpendicular to one another. The intensities I0 et Ia of the two partial beams are determined photometrically by means of two detectors (6a, 6b) and the ratio (Q) of the measured intensities is formed (ratio builder: 8).

IPC 1-7 (main, further and additional classification)

G01N 21/21; A61B 5/00; G01J 4/04

IPC 8 full level (invention and additional information)

A61B 5/145 (2006.01); A61B 5/1455 (2006.01); G01J 4/04 (2006.01); G01N 21/21 (2006.01)

CPC (invention and additional information)

G01J 4/04 (2013.01)

Citation (search report)

See references of WO 9966309A1

Designated contracting state (EPC)

AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

WO 9966309 A1 19991223; AU 4607499 A 20000105; CN 1305586 A 20010725; DE 19826294 C1 20000210; EP 1086365 A1 20010328; JP 2002518669 A 20020625; US 6577393 B1 20030610

INPADOC legal status


2002-09-11 [18W] WITHDRAWN

- Date of withdrawal: 20020717

2001-06-13 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20010425

2001-03-28 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20001130

2001-03-28 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

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

2001-03-28 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Free text: AL PAYMENT 20001130;LT PAYMENT 20001130;LV PAYMENT 20001130;MK PAYMENT 20001130;RO PAYMENT 20001130;SI PAYMENT 20001130