Divergent light optical systems for liquid chromatography
US4475813A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 30, 1982 |
| Grant date | Oct 9, 1984 |
| Priority date | — |
| Expiry date | Aug 30, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N30/94
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Improved optical systems for liquid chromatographic apparatus comprise flow cells with light transparent portions through which one or more beams of light may be passed through an effluent stream flowing in the cell, one or more light sources on one side of the flow cell to project light through the cell and its contained effluent stream, one or more light limiting apertures positioned on the opposite side of the cell in the paths of the light beams, one or more positive light focusing elements positioned in the path of the light beams from the cell to the apertures to image the center of the cell at the apertures and a light sensor positioned in the path of the light beam on the side of each aperture opposite to its respective light focusing element. Improved methods of chromatographic analysis using the new optical systems are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.