Lens for capillary electrophoresis and chromatography
US5239360A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 31, 1990 |
| Grant date | Aug 24, 1993 |
| Priority date | — |
| Expiry date | Jul 31, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2201/0638
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for enhancing signal to noise ratio in the detection of electromagnetic radiation traversing a capillary tube includes a ball lens and a holding element for holding the ball lens and the capillary tube, the holding element having an aperture so that the aperature and the lens together define an optic axis. The holding element is configured to hold the capillary tube such that the center of the capillary tube traverses the optic axis. The lens has a focal length and is held at such a position relative to that focal length by the holding element such that electromagnetic radiation incident on the aperature is focussed to pass radially through the capillary tube. Thus, the effective path length is 100% of the inside diameter of the capillary tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.