Optical sampling arrangements

Details Optical sampling arrangements Optical sampling arrangements

2006-10-04

2009-11-17

Le, Que T (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C250S576000, C250S216000

Reexamination Certificate

active

07619235

ABSTRACT:
An infra-red liquid sampling cell has a sapphire base plate with a part-spherical concave recess. A sapphire upper plate is hinged relative to the base plate larger radius of curvature than the recess. When the upper plate is lowered into contact with the base plate its convex surface contacts the liquid sample thereby excluding air bubbles and, when in contact with the edge of the recess, produces a well-defined sample thickness. An infra-red source directs radiation down through both plates and the liquid sample to a detector.

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Infrared Window Materials, http://infrared.als.lbl.gov/IRwindows.html.

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