Patent ID: 7362429
Filing Date: 2008-04-22
Classification: G01N

Abstract:
1. A set of light-guiding flowcells for a fluid comprising: a set of channels formed in a substrate of material having an index of refraction lower than an index of said fluid and an absorption coefficient sufficient to substantially attenuate light propagating through said material; a set of channel covers formed in a section of material having an index of refraction identical to said substrate material and an absorption coefficient sufficient to substantially attenuate light propagating through said material, said set of channel covers fixed to said set of channels forming a set of covered channels; at least one covered channel having a fluid inlet and outlet port configured off an axis of said covered channel; at least one covered channel having a source of light at a light entrance end and having a light exit end; whereby said at least one covered channel and fluid effect guiding of said light by attenuated total reflection and said at least one covered channel has minimal absorptive effect on said light guided by internal reflection.