Patent ID: 9074990
Filing Date: 2015-07-07
Classification: E21B,G01J,G01N,G02B,G06E

Abstract:
1. A device, comprising: an electromagnetic radiation source configured to optically interact with a sample having a characteristic of interest; a first integrated computational element arranged within a primary channel and configured to optically interact with the electromagnetic radiation source and produce a first modified electromagnetic radiation, wherein the first integrated computational element is configured to be positively or negatively correlated to the characteristic of interest; a second integrated computational element arranged within a reference channel and configured to optically interact with the electromagnetic radiation source and produce a second modified electromagnetic radiation, wherein the second integrated computational element is configured to be correlated to the characteristic of interest with an opposite sign relative to the first integrated computational element; and a first detector arranged to generate a first signal from the first modified electromagnetic radiation and a second signal from the second modified electromagnetic radiation, and generate an output signal corresponding to the characteristic of the sample, wherein the second signal decreases when the first signal increases according to the characteristic of the sample, and wherein the second signal increases when the first signal decreases according to the characteristic of the sample.