EP 1463929 A1 20041006 - METHOD AND ARRAY FOR THE DETECTION OF FOREIGN GAS IN OPTICAL IMAGING AND/OR BEAM CONTROL SYSTEMS
Title (en)
METHOD AND ARRAY FOR THE DETECTION OF FOREIGN GAS IN OPTICAL IMAGING AND/OR BEAM CONTROL SYSTEMS
Title (de)
VERFAHREN UND ANORDNUNG ZUR FREMDGASERKENNUNG IN OPTISCHEN ABBILDUNGS- UND/ODER STRAHLFÜHRUNGSSYSTEMEN
Title (fr)
PROCEDE ET DISPOSITIF DE RECONNAISSANCE DE GAZ ETRANGER DANS DES SYSTEMES OPTIQUES DE FORMATION D'IMAGES ET/OU DE GUIDAGE DE FAISCEAUX
Publication
Application
Priority
- DE 10200349 A 20020108
- EP 0214806 W 20021230
Abstract (en)
[origin: WO03058213A1] The invention relates to a method and an array for detecting foreign substances in the beam path of optical imaging or beam control systems (10), in which the housing enclosing the beam path and the optical components (10') is filled or flushed with a protective gas. Said protective gas is exposed to an intensity-modulated electromagnetic analytical wavefield (4') in a test volume (3). A photoacoustic signal (5) is generated for detecting impurities or foreign gases by means of the photoacoustic effect created when frequency components of the analytical wavefield (4') are absorbed by said foreign gases and/or impurities.
IPC 1-7
IPC 8 full level
B23K 26/12 (2006.01); B23K 26/70 (2014.01); G01N 21/17 (2006.01)
CPC (source: EP)
B23K 26/12 (2013.01); B23K 26/128 (2013.01); B23K 26/705 (2015.10); G01N 21/1702 (2013.01)
Citation (search report)
See references of WO 03058213A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SI SK TR
DOCDB simple family (publication)
WO 03058213 A1 20030717; AU 2002367326 A1 20030724; DE 10200349 A1 20030717; EP 1463929 A1 20041006
DOCDB simple family (application)
EP 0214806 W 20021230; AU 2002367326 A 20021230; DE 10200349 A 20020108; EP 02806029 A 20021230