Optics: measuring and testing – For light transmission or absorption – Of fluent material
Reexamination Certificate
2007-08-07
2007-08-07
Toatley, Jr., Gregory J. (Department: 2877)
Optics: measuring and testing
For light transmission or absorption
Of fluent material
C356S432000
Reexamination Certificate
active
11027930
ABSTRACT:
Each of two sensors, positioned to simultaneously detect electromagnetic radiation absorption along a path, is calibrated to define a unique response curve associated therewith that relates a change in voltage output for each sensor to a change in optical density. A ratio-of-responses curve is defined by a ratio of the response curve associated with the first sensor to the response curve associated with the second sensor. A ratio of sensor output changes is generated using outputs from the sensors. An operating point on the ratio-of-responses curve is established using the ratio of sensor output changes. The established operating point is indicative of an optical density. When the operating point is in the non-linear response region of at least one of the sensors, the operating point and optical density corresponding thereto can be used to establish an actual response of at least one of the sensors whereby the actual sensor output can be used in determining changes in the optical density.
REFERENCES:
patent: 4443791 (1984-04-01), Risgin et al.
patent: 4578762 (1986-03-01), Wong
patent: 4730479 (1988-03-01), Pyke et al.
patent: 5034725 (1991-07-01), Sorensen
patent: 5341214 (1994-08-01), Wong
patent: 5789659 (1998-08-01), Williams
patent: 5841137 (1998-11-01), Whitney
patent: 6008928 (1999-12-01), Sachse et al.
patent: 6051123 (2000-04-01), Joshi et al.
patent: 6057923 (2000-05-01), Sachse
patent: 6289288 (2001-09-01), Kraft
patent: 6360582 (2002-03-01), Chelvayohan et al.
patent: 6574031 (2003-06-01), Sachse
patent: 6611329 (2003-08-01), Sachse
patent: 6688159 (2004-02-01), Grunewald
patent: 6789021 (2004-09-01), Rendahl et al.
patent: 2003/0147080 (2003-08-01), Sarkis et al.
patent: 2003/0206325 (2003-11-01), Sachse et al.
patent: 2004/0156050 (2004-08-01), Sachse et al.
patent: 2005/0253061 (2005-11-01), Cameron et al.
patent: 2006/0047445 (2006-03-01), Williams et al.
Rana Mauro
Sachse Glen W.
Galus Helen M.
Underwood Jarreas
United States of America as represented by the Administrator of
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