Optical analysis system and method for real time multivariate optical computing
First Claim
1. A method of determining information carried by light using a multivariate optical analysis system, the method comprising:
- filtering a source light through a spectral element;
reflecting the filtered light through a first region of a cavity in a first direction of a sample to be measured, the cavity including an element forming a first aperture for passage of the reflected filtered light, the element defining a second aperture having no reflected filtered light passing therethrough;
focusing the reflected light proximate to the sample;
reflecting the focused light from the sample through the second aperture in a second direction of a beamsplitter, the light being reflected from the sample, the reflected light carrying information about the sample;
splitting the light from the second aperture with the beamsplitter into a first light and a second light;
optically extracting the information of the first light with an optical element into an orthogonal component;
directing the first light extracted by the optical element onto a first photodetector to measure a first signal;
directing the second light onto a second photodetector to measure a second signal; and
comparing the first signal to the second signal to determine a property of the sample.
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Accused Products
Abstract
An optical analysis system and method for determining information carried by light include a multivariate optical element disposed in the system to receive a source light from an illumination source; filtering the source light through a spectral element in the optical element analysis system; reflecting the filtered light through an inner region of a cavity in a first direction of a sample to be measured, the cavity defining a second region disposed about the inner region; focusing the reflected light proximate the sample; reflecting the focused light from the sample through the second region in a second direction of a beamsplitter, the light being reflected from the sample carrying data from the sample; splitting the sample carrying light with the beamsplitter into a first light and a second light; optically filtering the data of the first light with the multivariate optical element into an orthogonal component; directing the first light filtered by the multivariate optical element onto a first photodetector; directing the second light onto a second photodetector; and comparing the orthogonal component to information present in the second light to determine a property of the sample.
168 Citations
41 Claims
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1. A method of determining information carried by light using a multivariate optical analysis system, the method comprising:
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filtering a source light through a spectral element; reflecting the filtered light through a first region of a cavity in a first direction of a sample to be measured, the cavity including an element forming a first aperture for passage of the reflected filtered light, the element defining a second aperture having no reflected filtered light passing therethrough; focusing the reflected light proximate to the sample; reflecting the focused light from the sample through the second aperture in a second direction of a beamsplitter, the light being reflected from the sample, the reflected light carrying information about the sample; splitting the light from the second aperture with the beamsplitter into a first light and a second light; optically extracting the information of the first light with an optical element into an orthogonal component; directing the first light extracted by the optical element onto a first photodetector to measure a first signal; directing the second light onto a second photodetector to measure a second signal; and comparing the first signal to the second signal to determine a property of the sample. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 26)
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15. An optical analysis system for determining information carried by light, the optical analysis system comprising:
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a light source being configured to radiate a first light along a first ray path; a modulator disposed in the first ray path, the modulator being configured to modulate the first light to a desired frequency; a spectral element disposed proximate the modulator, the spectral element being configured to filter the first light for a spectral range of interest of a sample; a cavity in communication with the spectral element, the cavity being configured to direct the first light in a direction of the sample, the sample reflecting the first light as a second light, the cavity being further configured to direct the second light and comprising a geometrical element to form a first aperture for the first light different from a second aperture for the second light, having no first light passing through the second aperture; a beamsplitter being configured to split the second light into a first beam and a second beam; an optical element disposed to receive the first beam, the optical element being configured to optically extract information carried by the first beam into at least one orthogonal component of the first beam; a first detector in communication with the optical element to measure a property of the orthogonal component to measure the information; and a second detector being configured to receive the second beam for comparison of the property of the orthogonal component to the second beam. - View Dependent Claims (16, 17, 18, 19, 25)
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20. An optical analysis system for determining information carried by light, the optical analysis system comprising:
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a light source being configured to radiate a first light along a first ray path; a cavity disposed along said first ray path, the cavity being configured to direct the first light in a direction of the sample, the sample reflecting the first light as a second light, the cavity being further configured to direct the second light and comprising a geometrical element to form a first aperture for the first light different from a second aperture for the second light, having no first light passing through the second aperture; a beamsplitter being configured to split the second light into a first beam and a second beam; an optical element disposed to receive the first beam, the optical element being configured to optically extract at least one orthogonal component of the first beam; a first detector in communication with the optical element to measure a property of the orthogonal component; and a second detector configured to receive the second beam. - View Dependent Claims (21, 22, 23)
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24. A method of determining information carried by light using a multivariate optical analysis system, the method comprising:
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filtering a source light through a spectral element; reflecting the filtered light through a first region of a cavity in a first direction of a sample to be measured, the cavity defining a separate second region within the cavity; focusing the reflected light proximate to the sample; reflecting the focused light from the sample through the second region in a second direction of a beamsplitter, the light being reflected from the sample, the reflected light carrying information about the sample; separating the light reflected from the sample and the filtered light in the second region; splitting the light reflected from the sample with the beamsplitter into a first light and a second light; optically extracting the information of the first light with an optical element into an orthogonal component; directing the first light extracted by the optical element onto a first photodetector to measure a first signal; directing the second light onto a second photodetector to measure a second signal; and comparing the first signal to the second signal to determine a property of the sample; and auto-calibrating the multivariate optical analysis system using a first signal corresponding to the signal from a detector through an optical element and a second signal corresponding to a reference signal from a separate detector. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41)
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Specification