Chemical sensor using two-dimensional lens array
First Claim
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1. A chemical sensor for detecting a plurality of analytes in a sample, said sensor comprising:
- a patterned signal layer comprising a two-dimensional array of discrete, optically transparent test sections at known locations thereon, each of said test sections comprising an immobilized specific binding partner for one of said plurality of analytes, such that specific binding of said analyte to said immobilized specific binding partner generates an optical signal in said test section indicative of the presence of said analyte;
a two-dimensional light sensor array which detects said optical signal in a corresponding discrete detection section; and
a two-dimensional array of graded index of refraction lenses which focuses each said optical signal from each said test section into each said corresponding detection section.
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Abstract
A chemical sensor includes a patterned layer having discrete sections, a -dimensional detector array, and a two-dimensional lens array that focuses an optical signal from the patterned layer onto the two dimensional detector array. Typically, the two-dimensional detector array is a charge-coupled device array and the lens array is a graded index of refraction lens array. The chemical sensor maintains good resolution throughout its field of view.
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Citations
15 Claims
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1. A chemical sensor for detecting a plurality of analytes in a sample, said sensor comprising:
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a patterned signal layer comprising a two-dimensional array of discrete, optically transparent test sections at known locations thereon, each of said test sections comprising an immobilized specific binding partner for one of said plurality of analytes, such that specific binding of said analyte to said immobilized specific binding partner generates an optical signal in said test section indicative of the presence of said analyte; a two-dimensional light sensor array which detects said optical signal in a corresponding discrete detection section; and a two-dimensional array of graded index of refraction lenses which focuses each said optical signal from each said test section into each said corresponding detection section. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of simultaneously detecting a plurality of analytes in a sample, comprising:
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(a) providing a chemical sensor, said sensor comprising; a patterned signal layer comprising a two-dimensional array of discrete, optically transparent test sections at known locations thereon, each of said test sections comprising an immobilized specific binding partner for one of said plurality of analytes, such that specific binding of said analyte to said immobilized specific binding partner generates an optical signal indicative of the presence of said analyte in said test section; a two-dimensional light sensor array which detects said optical signal in a corresponding discrete detection section; and a two-dimensional array of graded index of refraction lenses which focuses each said optical signal from each said test section into each said corresponding detection section; (b) contacting said sample to said patterned signal layer; and (c) detecting the presence or absence of said focused optical signal in each of said detection sections, whereby the presence of said focused optical signal in said detection section indicates the specific binding of the analyte in the test section and thereby indicates the presence of the analyte in the sample. - View Dependent Claims (11, 12, 13, 14)
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15. A method of simultaneously detecting a plurality of analytes in a sample, comprising:
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(a) providing a chemical sensor, said sensor comprising; a patterned signal layer comprising a two-dimensional array of discrete, optically transparent test sections at known locations thereon, each of said test sections comprising an immobilized antibody which specifically binds to one of said plurality of analytes such that the specific binding generates an optical signal indicative of the presence of said analyte in said test section; a two-dimensional light sensor array which detects said optical signal in a corresponding discrete detection section; a two-dimensional array of graded index of refraction lenses which focuses each said optical signal from each said test section into each said corresponding detection section; and
,a light source for irradiating a fluorescent label at a known excitation wavelength such that the fluorescent label emits light a known emission wavelength to provide said optical signal; (b) contacting said sample, said patterned sign layer and a labeled reagent comprising said fluorescent label conjugated to (i) either said analyte or an analog thereof which is specifically bound by said immobilized antibody or (ii) a second antibody which specifically binds to said analyte at a site which does not interfere with the specific binding between said analyte and said immobilized antibody; (c) irradiating said patterned signal layer with said excitation wavelength after said contacting step, thereby producing said focused optical signal; and (d) detecting the presence or absence of said focused optical signal in each of said detection sections, whereby the presence of said focused optical signal indicates the specific binding of the analyte in the test section and thereby indicates the presence of the analyte in the sample.
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Specification