EP 0970353 A1 20000112 - 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
Application
Priority
- FR 9800590 W 19980324
- FR 9703717 A 19970326
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
IPC 8 full level
CPC (source: EP US)
G01J 1/04 (2013.01 - EP US); G01J 1/0407 (2013.01 - EP US); G01J 9/02 (2013.01 - EP US)
Citation (search report)
See references of WO 9843054A1
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
FR 2761488 A1 19981002; FR 2761488 B1 19990611; EP 0970353 A1 20000112; US 6191863 B1 20010220; WO 9843054 A1 19981001
DOCDB simple family (application)
FR 9703717 A 19970326; EP 98917219 A 19980324; FR 9800590 W 19980324; US 38185599 A 19990927