Supersonic nozzle for use in an infrared spectrometer

Details Supersonic nozzle for use in an infrared spectrometer Supersonic nozzle for use in an infrared spectrometer

1987-08-20

1989-08-29

Howell, Janice A.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250343, G01N 2103

Patent

active

048619990

ABSTRACT:
This invention relates to a supersonic nozzle (2) for injecting a gas into an infrared spectrometer, said nozzle having an aperture (24) that produces a one-dimensional expansion of said gas. The nozzle has an entrance (4) and exit (6) and between the aperture (24) and the exit (6) is a region for one-dimensional expansion of the gas. The region has two windows (14) that extend on either side of said aperture (24) towards said exit, said windows having an interior surface (30) that is set back slightly from said aperture (24). The windows (14) are made of an appropriate material such as zinc selenide to pass infrared rays and allow the gas to expand in one dimension only.

REFERENCES:
patent: 2731877 (1956-01-01), Clamann
patent: 3901820 (1975-08-01), Wood
patent: 4440013 (1984-04-01), Adams
patent: 4717827 (1988-01-01), Harvey
patent: 4730111 (1988-03-01), Vestal et al.

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