Device and method for performing spectral measurements in flow cells with spatial resolution
First Claim
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1. A device for analyzing the spectral properties of a sample, comprising:
- a light source;
a microfluidic channel for holding a flowing sample to be analyzed;
a variable transmission optical filter having at least two areas with different optical properties;
and detecting means capable of measuring light intensity with at least one dimensional resolution;
wherein when light from said light source is directed at said flowing sample within said channel and through said optical filter and is received by said detecting means, said detecting means analyzes the spectral properties of the flowing sample.
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Abstract
A device and method for performing spectral measurements in flow cells with spatial resolution using a variable transmission optical filter having at least two areas with different optical properties. Light from a light source passes through the variable transmission filter to a flow cell containing a sample to be analyzed. The resultant light pattern is sensed by a detecting means, which analyzes the spectral properties of the sample within the flow cell.
151 Citations
23 Claims
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1. A device for analyzing the spectral properties of a sample, comprising:
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a light source; a microfluidic channel for holding a flowing sample to be analyzed; a variable transmission optical filter having at least two areas with different optical properties; and detecting means capable of measuring light intensity with at least one dimensional resolution; wherein when light from said light source is directed at said flowing sample within said channel and through said optical filter and is received by said detecting means, said detecting means analyzes the spectral properties of the flowing sample. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 21)
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16. A method of analyzing the optical properties of a sample, comprising the steps of:
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locating a flowing sample to be analyzed within a microfluidic measurement cell; directing a light source at said measurement cell; filtering the light from said light source using a variable transmission optical filter having at least two areas with different optical properties; receiving the light from said light source which has passed through said optical filter and said flowing sample within said measurement cell at a detection means and analyzing the spectral properties of said sample. - View Dependent Claims (17, 18, 19, 22, 23)
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20. A method of making an optical filter, comprising the steps of:
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selecting an optically transparent substrate; and attaching to said substrate at least one optically active substance having at least two areas of different optical properties; wherein said method of attaching comprises printing said areas of different optical properties with an ink jet printer.
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Specification