Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate
2011-07-19
2011-07-19
Lee, John (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
C073S293000
Reexamination Certificate
active
07982201
ABSTRACT:
A system and method for identifying the levels of one or more liquids in a vessel using an optical imager and one or more appropriately positioned light sources and an optical imager for capturing digital images of the illuminated vessel. A laser line generator is positioned oppositely from the imager and oriented to project a laser line through the vessel so that it may be imaged by the imager. A second light source, such as an LED, may be positioned above or below the vessel and oriented to project light downwardly or upwardly through the vessel and its contents. Captured images of the vessel are then processed by a programmable device, such as a microcontroller, to determine the levels of materials in the vessel based on the optical characteristics revealed in the captured image.
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Title: Design and operation of a fiber optic sensor for liquid level detection Author: Golnabi Source: Optics and Lasers in Engineering, vol. 41, Issue 5, May 2004, pp. 801.
Barber Charles Paul
Bryant Steven Thomas
Bond Schoeneck & King
JADAK, LLC
Lee John
Nocilly David L.
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