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US 7,119,899 B2Granted
Particle sensor system
AssigneeLighthouse Worldwide Solutions, Inc.
InventorsRocco D. Pochy, Scott H. Salton, Thomas C. Saunders, William L. Shade, Jr.
Life of this patent
Estimating the term…
Abstract
A device is illustrated for detecting particles in a fluid that can detect smaller particles without the need for added power or space and can be implemented inexpensively. The device utilizes two mirrors and a photo-diode. The housing of the photo-electric diode is machined to form one of the mirrors. The mirrors have a special positioning so that the second mirror uses the first mirror to reflect light deflected by particles back to the photo-electric diode.
Claims19
A particle sensor comprising:
- a light detection device;
- a housing in communication with said light detection device;
- a first concave reflective surface on said housing;
- wherein said reflective surface has a first focal point and a second focal point defining a first axis of symmetry;
- a second reflective surface having a concave ellipsoidal shape;
- wherein said second reflective surface has a first focal point and a second focal point defining a second axis of symmetry;
- and
- a means for conducting a gas stream with small particles through the said first focal point of said second reflective surface;
- and
- a means for projecting light through the said first focal point of said second reflective surface.
7 more elements
A particle sensor comprising:
- a first reflective surface having a concave shape;
- wherein said first reflective surface has a first focal point and a second focal point defining a first axis of symmetry;
- a second reflective surface having a concave ellipsoidal shape;
- wherein said second reflective surface has a first focal point and a second focal point defining a second axis of symmetry;
- and,
- wherein said first symmetry of axis and said second axis of symmetry are coaxial;
- a means for conducting gas stream with small particles through the said first focal point of said second reflective surface;
- a means for projecting light through the said first focal point of said second reflective surface;
- a housing in communication with said first reflective surface;
- and
- a means for detecting light in communication with said housing.
8 more elements
Dependencies are inferred from the claim text.