Gas cell with reflected light bundles

Details Gas cell with reflected light bundles Gas cell with reflected light bundles

2005-07-26

2005-07-26

Porta, David (Department: 2878)

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

C250S343000, C250S353000, C250S574000, C250S575000, C250S576000

Reexamination Certificate

active

06921899

ABSTRACT:
The invention relates to a gas cell (2′) that includes a cavity (20) for a chosen gas volume, a light source (30), and one or more light bundle receiving units or detectors (21, 22, 23, 24, 25). The cavity (20) is formed by and delimited by, inter alia, a first partially elliptical mirror surface (20a) and two partially elliptical mirror surfaces, a second (20b) and a third (20c), which are opposed to said first mirror surface (20a) and which are so orientated in relation to each other that a light bundle (130a, 130b) will be reflected by said mirror surfaces (20a, 20b, 20c) so as to form an optical measurement path extremity, and terminate in a light-receiving unit (21, 22, 23, 24, 25) allocated to a chosen measurement path extremity. The light source (30) is disposed in one end region of said cavity (20) and a reflector (30a, 30b) which functions to cause emitted light bundles to converge towards a focusing point (F) is also disposed in said one end region.

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patent: 5973326 (1999-10-01), Parry et al.
patent: 6016203 (2000-01-01), Martin
patent: 4214840 (1993-11-01), None
patent: 97/10460 (1997-03-01), None
patent: 98/09152 (1998-03-01), None
International Search Report.

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