Methods and devices for optically determining a characteristic of a substance
First Claim
1. A method of determining a characteristic of a sample, comprising:
- optically interacting an electromagnetic radiation source with the sample and a first integrated computational element arranged within a primary channel and a second integrated computational element arranged within a reference channel, wherein the first and second computational elements are configured to be positively or negatively correlated to the characteristic of the sample;
producing first and second modified electromagnetic radiations from the first and second integrated computational elements, respectively, wherein, when a resulting signal from the first modified electromagnetic radiation increases with an increased sample characteristic, a resulting signal from the second modified electromagnetic radiation decreases, and wherein, when the resulting signal from the first modified electromagnetic radiation decreases with the increased sample characteristic, the resulting signal from the second modified electromagnetic radiation increases;
receiving the first and second modified electromagnetic radiations with a first detector; and
generating an output signal with the first detector, the output signal corresponding to the characteristic of the sample.
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Abstract
Optical computing devices are disclosed. One exemplary optical computing device includes an electromagnetic radiation source configured to optically interact with a sample and first and second integrated computational elements arranged in primary and reference channels, respectively, the first and second computational elements are configured to be either positively or negatively correlated to the characteristic of the sample. The first and second integrated computational elements produce first and second modified electromagnetic radiations, and a detector is arranged to receive the first and second modified electromagnetic radiations and generate an output signal corresponding to the characteristic of the sample.
101 Citations
20 Claims
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1. A method of determining a characteristic of a sample, comprising:
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optically interacting an electromagnetic radiation source with the sample and a first integrated computational element arranged within a primary channel and a second integrated computational element arranged within a reference channel, wherein the first and second computational elements are configured to be positively or negatively correlated to the characteristic of the sample; producing first and second modified electromagnetic radiations from the first and second integrated computational elements, respectively, wherein, when a resulting signal from the first modified electromagnetic radiation increases with an increased sample characteristic, a resulting signal from the second modified electromagnetic radiation decreases, and wherein, when the resulting signal from the first modified electromagnetic radiation decreases with the increased sample characteristic, the resulting signal from the second modified electromagnetic radiation increases; receiving the first and second modified electromagnetic radiations with a first detector; and generating an output signal with the first detector, the output signal corresponding to the characteristic of the sample. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of determining a characteristic of a sample, comprising:
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optically interacting an electromagnetic radiation source with the sample and a first integrated computational element arranged within a primary channel and a second integrated computational element arranged within a reference channel, wherein the first and second computational elements are configured to be positively or negatively correlated to the characteristic of the sample; producing first and second modified electromagnetic radiations from the first and second integrated computational elements, respectively, wherein, when a resulting signal from the first modified electromagnetic radiation increases with an increased sample characteristic, a resulting signal from the second modified electromagnetic radiation decreases, and wherein, when the resulting signal from the first modified electromagnetic radiation decreases with the increased sample characteristic, the resulting signal from the second modified electromagnetic radiation increases; receiving the first modified electromagnetic radiation with a first detector; receiving the second modified electromagnetic radiation with a second detector; generating a first output signal with the first detector and a second output signal with the second detector; and computationally combining the first and second output with a signal processor to determine the characteristic of interest of the sample. - View Dependent Claims (11, 12, 13)
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14. A method for optically determining a characteristic of a sample, the method comprising:
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optically interacting an electromagnetic radiation with the sample; separating the electromagnetic radiation optically interacted with the sample into a first optically interacted portion and a second optically interacted portion; modifying the first optically interacted portion with a first integrated computational element; modifying the second optically interacted portion with a second integrated computational element; forming a primary channel signal with the modified first optically interacted portion, the primary channel signal having a primary channel correlation with the characteristic of the sample; forming a reference channel signal with the modified second optically interacted portion, the reference channel signal having a reference channel correlation with the characteristic of the sample; generating an output signal corresponding to the characteristic of the sample; and configuring wherein the primary channel correlation opposite to the reference channel correlation so that when the primary channel signal decreases with an increased sample characteristic, the reference channel signal increases, and when the primary channel signal increases with an increased sample characteristic, the reference channel signal decreases. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification