Nephelometer with detection system focused on optical dark region
US4136953A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 19, 1977 |
| Grant date | Jan 30, 1979 |
| Priority date | — |
| Expiry date | Jul 19, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/51
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A nephelometer including an optical excitation system for directing light through a first window area into a cylindrical glass container and an optical detection system for quantitatively monitoring light scattered by a substance within the container and passing therefrom through a second window area. The optical detection system includes a lens system in optical alignment with the second window area and focused on an optical dark region on an inner wall of the container opposite the second window area. The optical dark region is free of internal light reflections. Therefore, the light monitored by the detection system is scattered light from the substance substantially free of internal light reflections representing background error.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.