Methods and devices for optically determining a characteristic of a substance
First Claim
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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;
producing first and second modified electromagnetic radiations from the first and second integrated computational elements, respectively;
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, wherein the first integrated computational element is selected according to a first spectral response associated with the characteristic of the sample, and the second integrated computational element is selected according to a second spectral response associated with the same characteristic of the sample, thereby increasing a sensitivity of the output signal.
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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 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.
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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; producing first and second modified electromagnetic radiations from the first and second integrated computational elements, respectively; 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, wherein the first integrated computational element is selected according to a first spectral response associated with the characteristic of the sample, and the second integrated computational element is selected according to a second spectral response associated with the same characteristic of the sample, thereby increasing a sensitivity of the output signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for determining a characteristic of a sample, comprising:
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directing electromagnetic radiation to the sample and thereby generating optically interacted light; separating the optically interacted light into a first portion and a second portion; directing the first portion to a first integrated computational element; directing the second portion to a second integrated computational element; forming a first primary channel according to a first spectral response to the first integrated computational element, the first spectral response being associated with the characteristic of the sample; forming a second primary channel according to a second spectral response to the second integrated computational element, the second spectral response also being associated with the same characteristic of the sample, thereby increasing a sensitivity of the output signal; and determining the characteristic of the sample with an increased sensitivity based on a signal from the first primary channel and a signal from the second primary channel. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification