Global patent index - EP 0970353 A1

EP 0970353 A1 2000-01-12 - DEVICE AND PROCESS FOR EXTINGUISHING A SOURCE

Title (en)

DEVICE AND PROCESS FOR EXTINGUISHING A SOURCE

Title (de)

VERFAHREN UND VORRICHTUNG ZUM ABSCHALTEN EINER LICHTQUELLE

Title (fr)

DISPOSITIF ET PROCEDE D'EXTINCTION DE SOURCE

Publication

EP 0970353 A1 (FR)

Application

EP 98917219 A

Priority

  • FR 9800590 W
  • FR 9703717 A

Abstract (en)

[origin: FR2761488A1] The invention relates to a device and process for extinguishing a source. Said device comprises an interferometer (2) which receives an incident light beam (10) emanating from a central point source. The interferometer has a separator (4) separating the incident beam into two secondary beams (13, 14) with the same focal power, and two arms (5,6) each equipped with an optical system, and having optical paths of equal length. Combining elements (7) merge the secondary beam into one output beam (12). Each of the focal points (F1, F'1) of the principal planes (31, 32) and of the antiprincipal planes of one of the two optical systems is respectively superposed on a focus (F1, F'2), an antiprincipal plane (33, 34), and a principal plane of the other optical system beyond the formation of the output beam. The arms each have a number of passages through at least one of the focal points of the optical system corresponding to that arm, with the number of passages differing by an uneven number. In this way, the point source has one contribution extinguished in the output beam. The application of the invention is achromatic interferential coronographs.

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

G01J 9/02

IPC 8 full level (invention and additional information)

G01J 1/04 (2006.01); G01J 9/02 (2006.01)

CPC (invention and additional information)

G01J 9/02 (2013.01); G01J 1/04 (2013.01); G01J 1/0407 (2013.01)

Citation (search report)

See references of WO 9843054A1

Designated contracting state (EPC)

DE FR GB IT

EPO simple patent family

FR 2761488 A1 19981002; FR 2761488 B1 19990611; EP 0970353 A1 20000112; US 6191863 B1 20010220; WO 9843054 A1 19981001

INPADOC legal status

2007-09-26 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20070325

2006-12-13 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20060130

2000-01-12 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19991026

2000-01-12 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): DE FR GB IT