Patent ID: 7894055
Filing Date: 2011-02-22
Classification: G01N

Abstract:
1. An optical cell, comprising: a frontal plate having a first optical window through which an incident light beam can pass; a back plate; a spacer in contact with the front plate and the back plate, the spacer being separable from the front plate and the back plate; and a frame in contact with the front plate and the back plate; wherein the front and back plates and the spacer define a sample space capable of containing a sample and having a sample gap between the front plate and the back plate; wherein the front plate, back plate, spacer, and frame are selected to have coefficients of linear expression and height dimensions so that the optical cell is spectroscopically stable with respect to varying temperature of the sample space in a temperature range of experimentation, and wherein the spacer comprises a hydrocarbon-resistant polymer.