Capillary flow cell with bulbous ends
AssigneeEldex Laboratories, Inc.
InventorMiner N. Munk
Life of this patent
Estimating the term…
Abstract
A bent capillary flow cell with protruding end bulbs coaxial with centerline of an elongated center cylindrical section of capillary tubing. The bulbs provide a high light throughput entrance window for the cell. Light is piped along the elongated center section by total internal reflection at the outside surface of the cell wall. An external light absorbing band is placed in optical contact with outer surface of the cell wall over a transition cone region between the bulb and center cylindrical section of the cell. Each of the external light absorbing bands extend a short prescribed distance over the cylindrical wall to absorb light rays that would otherwise be light piped within the cell wall and have little exposure to the liquid in the cell.
Claims11
A capillary flow cell comprising:
- a tube having a first bend and a second bend;
- a first bulb located at said first bend in said tube for receiving light;
- and
- a second bulb located at said second bend in said tube for allowing said light to exit said tube.
A sample absorbance measuring system comprising:
- a light source for supplying light;
- a first lens for focusing said light;
- a capillary flow cell for receiving said focused light, comprising
- a tube having a first bend and a second bend;
- a first bulb located at said first bend in said tube for receiving said focused light;
- and
- a second bulb located at said second bend in said tube for allowing said focused light to exit said tube;
- and
- a light detector for detecting the light that exits the tube.
Dependencies are inferred from the claim text.