| US 7,554,661 B2 | ||
| Systems and methods for detection and classification of waterborne particles using a multiple angle light scattering (MALS) instrument | ||
| John A. Adams, Escondido, Calif. (US); Kristina M. Crousore, Oceanside, Calif. (US); Cherish K. Teters, San Diego, Calif. (US); and Oscar Hemberg, La Jolla, Calif. (US) | ||
| Assigned to JMAR Technologies, Inc., San Diego, Calif. (US) | ||
| Filed on Oct. 05, 2006, as Appl. No. 11/539,166. | ||
| Application 11/539166 is a continuation in part of application No. 11/231350, filed on Sep. 19, 2005. | ||
| Application 11/231350 is a continuation in part of application No. 11/381346, filed on May 02, 2006. | ||
| Prior Publication US 2007/0146703 A1, Jun. 28, 2007 | ||
| Int. Cl. G01N 21/00 (2006.01) | ||
| U.S. Cl. 356—338 | 26 Claims |
| 1. A system for detecting and identifying a particle in a liquid, the system comprising:
an optical axis;
a target zone, the optical axis intersecting the target zone;
at least one light source configured to generate a light beam and direct the light beam through the target zone;
an optic lens system configured to collect light scattered by the particle in the liquid medium in the target zone and direct
the scattered light to at least one detector, the detector configured to detect the light and generate a digital signal; and
a computer system coupled with the detector, the computer system configured to execute a set of programmed instructions to
identify and classify the particle, the instructions causing the computer system to:
extract events from the digital signal;
calculate the similarity between the extracted event and a known event; and
classify the event based on the similarity,
wherein similarity is determined by calculation of the ratios of outer pixels to inner pixels and comparing between the extracted
event and a known event.
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