Optics: measuring and testing – For light transmission or absorption – Of fluent material
Reexamination Certificate
2008-07-01
2008-07-01
Toatley, Jr., Gregory J. (Department: 2877)
Optics: measuring and testing
For light transmission or absorption
Of fluent material
Reexamination Certificate
active
07394545
ABSTRACT:
A system and method for counting opaque particles within a fluid sample. The system uses an optical lens system to focus a light beam onto a sample on a multi-dimensional translation stage. The translation stage is moved in a pattern such that the intensity of the transmitted light is measured as a function of path length. A photo detector is used to measure the transmitted light through the sample. An analog-to-digital converter quantifies the transmitted light intensity. Changes in light intensity along the path length are correlated with the detection of an opaque particle. Data processing algorithms are implemented to automatically determine the background noise level associated with the acquired data and to set a discriminator level above which a particle is registered. The total number of particles and an areal density is reported along with an estimate of the uncertainty.
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Codella Peter J.
Lasiuk Brian W.
Parker Wiley Lyle
Vanhove Andre
GE Betz, Inc.
Merlino Amanda H
Toatley , Jr. Gregory J.
Wegman Hessler & Vanderburg
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