Laser absorption spectral diffraction type gas detector and...

Details Laser absorption spectral diffraction type gas detector and... Laser absorption spectral diffraction type gas detector and...

2005-04-05

2005-04-05

Toatley, Jr., Gregory J. (Department: 2877)

Optics: measuring and testing

For light transmission or absorption

Of fluent material

Reexamination Certificate

active

06876450

ABSTRACT:
A laser absorption spectroscopy type gas detection device is provided in which a light source device emits a laser beam containing a light component having a wavelength corresponding to an absorption spectrum of gas to be detected. A concave mirror has a reflecting surface to reflect and condense the laser beam reflected by material body existing in an advancing direction of the laser beam. A light receiver is disposed at the condensing position by the concave mirror and outputs an electric signal for detecting whether the gas to be detected is present in a vicinity of the material body. An adjustment mechanism freely moves and adjusts a relative position of the concave mirror and the light receiver in accordance with a distance to the material body such that the light receiver is positioned at the condensing position.

REFERENCES:
patent: 5767976 (1998-06-01), Ankerhold et al.
patent: 58-198746 (1983-11-01), None
patent: 62-66142 (1987-03-01), None
patent: 1-280272 (1989-11-01), None
patent: 7-103887 (1995-04-01), None

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