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1. (WO1997018460) GAS SENSOR
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1997/018460 International Application No.: PCT/SE1996/001448
Publication Date: 22.05.1997 International Filing Date: 11.11.1996
Chapter 2 Demand Filed: 07.03.1997
IPC:
G01N 21/35 (2006.01)
G PHYSICS
01
MEASURING; TESTING
N
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21
Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible, or ultra-violet light
17
Systems in which incident light is modified in accordance with the properties of the material investigated
25
Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
31
Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
35
using infra-red light
Applicants:
MARTIN, Hans, Göran, Evald [SE/SE]; SE
Inventors:
MARTIN, Hans, Göran, Evald; SE
Agent:
LINDBLOM, Erik, J.; Flotthamn S-150 23 Enhörna, SE
Priority Data:
9504020-013.11.1995SE
Title (EN) GAS SENSOR
(FR) DETECTEUR A GAZ
Abstract:
(EN) The invention comprises a gas sensor (1), designed to enable a measurement of a gas sample that is enclosed in a cavity (2), having the shape of a block (50); the wall or wall sections of the cavity exhibiting highly-reflective properties for light. Said cavity contains means (51) for incoming rays of light, and means (52) for outgoing rays of light. Said cavity (2) exhibits opposing surface sections (55a, 56a, 57a) that are designed and coordinated so that incoming rays of light (60) are arranged to pass - without reflecting, or without appreciably reflecting within a plane (the x-z plane) - across said cavity (2) to a concave mirror surface (55a) that is oriented in a right angle to the plane; that said rays of light are arranged to pass reflected across said cavity (2) in a plane of the mirror surface to the other surfaces (56a, 57a), thereby forming a measuring path before the reflected beams of light are aimed towards said means (52) for exiting light.
(FR) L'invention a trait à un détecteur à gaz (1) se présentant sous la forme d'un bloc (50), conçu pour faciliter la mesure d'un échantillon de gaz enfermé dans une cavité (2). La paroi ou les parties de paroi de la cavité ont des propriétés hautement réfléchissantes vis à vis de la lumière. La cavité (2), qui comporte des moyens (51) permettant l'entrée de rayons et d'autres (52) leur sortie, comporte également des parties de surface opposées (55a, 56a, 57a) conçues et coordonnées pour faire en sorte que les rayons lumineux entrant traversent - sans se réfléchir ou sans se réfléchir de façon notable dans un plan (plan x-z) - la cavité (2) en direction d'une surface concave d'un miroir (55a) orienté à angle droit par rapport au plan. Il est fait en sorte que ces rayons lumineux traversent la cavité (2), une fois réfléchis dans un plan de la surface du miroir, en direction des autres surfaces (56a, 57a), constituant, de ce fait, un parcours de mesure avant que les faisceaux lumineux réfléchis ne soient orientés vers lesdits moyens (52) de sortie de la lumière.
Designated States: AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, CA, CH, CN, CU, CZ, DE, DK, EE, ES, FI, GB, GE, HU, IL, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, TJ, TM, TR, TT, UA, UG, US, UZ, VN
African Regional Intellectual Property Organization (ARIPO) (KE, LS, MW, SD, SZ, UG)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, CH, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
EP0873505JP2007256281US6016203JP2000500237CA2236039AU1996076592