Global Patent Index - EP 1019688 A1

EP 1019688 A1 2000-07-19 - ORRICHTUNG Z

Title (en)

ORRICHTUNG Z

Title (de)

VORRICHTUNG ZUR MESSUNG DER WELLENLÄNGE EINES LICHTBÜNDELS

Title (fr)

APPAREIL DE MESURE DE LA LONGUEUR D'ONDE D'UN FAISCEAU LUMINEUX

Publication

EP 1019688 A1 (FR)

Application

EP 99936719 A

Priority

  • FR 9901967 W
  • FR 9810329 A

Abstract (en)

[origin: FR2782383A1] The device has an interferometer measuring system that includes a Fizeau wedge (18,20) delimited by two fixed, transparent plates slightly inclined to each other. The interferometer system has an optical transformer (12,16) to transform the light beam into a slightly divergent spherical light wave, which illuminates the Fizeau wedge, to eliminate measurement uncertainties resulting from parasitic reflections on the first plate. The light beam passes through the Fizeau wedge along an optical path of fixed length and enters the wedge (18,20) through the first plate. The external face of the first plate is treated with an anti-reflective material. The system has a high resolution detector (30,32), of interference fringes resulting from reflections of the light beam on the two internal faces of the two plates. The detector generates electrical signals corresponding to the interference fringes. An electrical signal processor (72,74,76) calculates the wavelength of the light beam from maximal positions of the electrical signals.

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

G01J 9/02

IPC 8 full level (invention and additional information)

G01B 9/02 (2006.01); G01J 9/02 (2006.01)

CPC (invention and additional information)

G01J 9/02 (2013.01)

Citation (search report)

See references of WO 0009978A1

Designated contracting state (EPC)

DE GB NL

EPO simple patent family

FR 2782383 A1 20000218; FR 2782383 B1 20000915; EP 1019688 A1 20000719; JP 2002522782 A 20020723; WO 0009978 A1 20000224

INPADOC legal status


2004-05-26 [RBV] DESIGNATED CONTRACTING STATES (CORRECTION):

- Ref Legal Event Code: RBV

- Designated State(s): DE GB NL

2003-10-01 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20030304

2000-07-19 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20000327

2000-07-19 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

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