| US 7,502,110 B2 | ||
| Design for particle sensor system | ||
| Thomas C. Saunders, Milpitas, Calif. (US); William L. Shade, San Mateo, Calif. (US); Rocco D. Pochy, Milpitas, Calif. (US); and Scott H. Salton, Fremont, Calif. (US) | ||
| Assigned to Lighthouse Worldwide Solutions, Inc, Fremont, Calif. (US) | ||
| Filed on Oct. 09, 2006, as Appl. No. 11/539,836. | ||
| Application 11/539836 is a continuation of application No. 10/710568, filed on Jul. 21, 2004, granted, now 7,119,899. | ||
| Prior Publication US 2007/0285661 A1, Dec. 13, 2007 | ||
| Int. Cl. G01N 15/02 (2006.01) | ||
| U.S. Cl. 356—336 | 9 Claims |
| 1. A particle sensor comprising:
a light detection device;
a housing in communication with said light detection device;
a first reflective surface on said housing;
a second reflective surface;
a means for conducting a 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;
wherein said first reflective surface has a first focal point and a second focal point defining a first axis of symmetry;
wherein said first symmetry of axis and said second axis of symmetry are coaxial; and
wherein said second reflective surface has a first focal point and a second focal point defining a second axis of symmetry.
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