Global patent index - EP 1093573 A1

EP 1093573 A1 2001-04-25 - DEVICE FOR DETECTING A CHEMICAL ELEMENT BY PHOTOEXCITATION

Title (en)

DEVICE FOR DETECTING A CHEMICAL ELEMENT BY PHOTOEXCITATION

Title (de)

VORRICHTUNG ZUR DETEKTION EINES CHEMISCHES ELEMENT DURCH OPTISCHER ANREGUNG

Title (fr)

DISPOSITIF DE DETECTION D'UN ELEMENT CHIMIQUE PAR PHOTOEXCITATION

Publication

EP 1093573 A1 (FR)

Application

EP 99959124 A

Priority

  • CH 9900284 W
  • FR 9808711 A

Abstract (en)

[origin: FR2780788A1] The invention concerns a device for detecting by photoexcitation a chemical element in a host substrate, comprising: an optical excitation source (1) emitting, in the direction of a substance sample, a light beam whereof the wavelength, located in the mid infrared, corresponds to an absorption band specific of the element; and means for detecting and measuring (11, 12, 13) the heating effects of the host substance, resulting from the interaction of the element molecules excited by said beam with said substance. The optical excitation source is a III/V semiconductor laser. It can be a quantum cascade laser, a type II quantum well laser, a type II cascade quantum laser or a multi-quantum laser using materials with low forbidden band energy.

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

G01N 21/17

IPC 8 full level (invention and additional information)

G01N 21/17 (2006.01)

CPC (invention and additional information)

G01N 21/171 (2013.01)

Citation (search report)

See references of WO 0002033A1

Designated contracting state (EPC)

CH DE GB LI

EPO simple patent family

FR 2780788 A1 20000107; FR 2780788 B1 20000922; EP 1093573 A1 20010425; WO 0002033 A1 20000113

INPADOC legal status

2005-04-20 [18R] REFUSED

- Ref Legal Event Code: 18R

- Effective date: 20041126

2003-12-03 [17Q] FIRST EXAMINATION REPORT

- Ref Legal Event Code: 17Q

- Effective date: 20031021

2001-04-25 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20001229

2001-04-25 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): CH DE GB LI