Fluid refractive index optimizing particle counter
US11320360B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 30, 2019 |
| Grant date | May 3, 2022 |
| Priority date | — |
| Expiry date | Nov 15, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2015/1486
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Provided herein are systems and methods of optical particle counters which account and adjust for the refractive index of the carrier fluid being analyzed. The provided systems are robust and may be implemented in a variety of optical particle counters including obscured light, reflected light, emitted light and scattered light particle counters. The described systems may be useful with any fluid, including gases or liquids. In some cases, the system can account for the differences in refractive index between two liquids, for example, ultrapure water and an acid, such as sulfuric, hydrochloric, hydrofluoric, acetic, phosphoric, chromic phosphoric, and the like. By accounting for the refractive index of the carrier fluid, the described systems and methods are also more sensitive and able to more accurately detect and characterize smaller particles, including nanoscale sized particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.