Global Patent Index - EP 0939893 A1

EP 0939893 A1 19990908 - MINIATURISED PHOTOACOUSTIC SPECTROMETER

Title (en)

MINIATURISED PHOTOACOUSTIC SPECTROMETER

Title (de)

MINIATURISIERTES PHOTOAKUSTISCHES SPEKTROMETER

Title (fr)

SPECTROMETRE PHOTOACOUSTIQUE MINIATURISE

Publication

EP 0939893 A1 19990908 (FR)

Application

EP 98944020 A 19980918

Priority

  • FR 9802003 W 19980918
  • FR 9711697 A 19970919

Abstract (en)

[origin: FR2768813A1] An infrared source (18) modulated at about 20 Hz and mirror (24) are formed and sealed (22) between semiconducting substrata (2,4) and a further substrata (6) constitutes a filter. A micro-oven (12) is formed in another substratum (8) which is also used with a final substratum (10) to form a microphone (14) having electrodes (38,39).

IPC 1-7

G01N 21/17

IPC 8 full level

G01N 29/00 (2006.01); G01N 21/00 (2006.01); G01N 21/17 (2006.01); G02B 26/00 (2006.01)

CPC (source: EP US)

G01N 21/1702 (2013.01 - EP US); G02B 26/001 (2013.01 - EP US)

Citation (search report)

See references of WO 9915879A1

Designated contracting state (EPC)

DE GB IT

DOCDB simple family (publication)

FR 2768813 A1 19990326; FR 2768813 B1 19991022; EP 0939893 A1 19990908; JP 2002511946 A 20020416; US 6344647 B1 20020205; WO 9915879 A1 19990401

DOCDB simple family (application)

FR 9711697 A 19970919; EP 98944020 A 19980918; FR 9802003 W 19980918; JP 51863599 A 19980918; US 29708799 A 19990517