Detection of biochemical interactions on a biosensor using tunable filters and tunable lasers
First Claim
1. A measuring apparatus for use in detecting a biochemical interaction, the measuring apparatus comprising, in combination:
- a biosensor, wherein the biosensor comprises a colorimetric resonant optical biosensor embedded into a surface of a device receiving a sample to be tested,an illumination system including a light source for generating collimated light, the illumination system and directing the collimated light towards a surface of the biosensor;
a tunable filter operable to receive light transmitted through the biosensor and to pass a narrow band of light having wavelengths substantially centered at a passband wavelength and to reflect substantially all other wavelength, wherein the passband wavelength is adjusted according to a tuning voltage of the tunable filter, anda detector receiving light from the tunable filter wherein the detector of the measuring apparatus detects a biochemical interaction occurring on the colormetric resonant optical biosensor.
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Accused Products
Abstract
An apparatus and method for detection of peak wavelength values of colorimetric resonant optical biosensors using tunable filters and tunable lasers is provided. Biomolecular interactions may be detected on a biosensor by directing collimated white light towards a surface of the biosensor. Molecular binding on the surface of the biosensor is indicated by a shift in the peak wavelength value of reflected or transmitted light from the biosensor, while an increase in the wavelength corresponds to an increase in molecular absorption. A tunable laser light source may generate the collimated white light and a tunable filter may receive the reflected or transmitted light and pass the light to a photodiode sensor. The photodiode sensor then quantifies an amount of the light reflected or transmitted through the tunable filter as a function of the tuning voltage of the tunable filter.
106 Citations
20 Claims
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1. A measuring apparatus for use in detecting a biochemical interaction, the measuring apparatus comprising, in combination:
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a biosensor, wherein the biosensor comprises a colorimetric resonant optical biosensor embedded into a surface of a device receiving a sample to be tested, an illumination system including a light source for generating collimated light, the illumination system and directing the collimated light towards a surface of the biosensor; a tunable filter operable to receive light transmitted through the biosensor and to pass a narrow band of light having wavelengths substantially centered at a passband wavelength and to reflect substantially all other wavelength, wherein the passband wavelength is adjusted according to a tuning voltage of the tunable filter, and a detector receiving light from the tunable filter wherein the detector of the measuring apparatus detects a biochemical interaction occurring on the colormetric resonant optical biosensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. Apparatus comprising in combination:
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a colorimetric resonant optical biosensor embedded in the surface of a device for receiving a sample; a measuring apparatus for use in detecting a wavelength of maximum intensity in reflected light reflected from the biosensor, the measuring apparatus comprising; (1) a light source for generating collimated white light; (2) a power splitter receiving the collimated while light from the light source and directing the collimated white light towards a surface of the biosensor; and (3) a tunable detector that receives light reflected by the biosensor and measures a radiation spectrum of the light reflected from the biosensor, wherein the tunable detector includes a filter which passes a narrow band of light having wavelengths substantially centered at a passband wavelength from the light reflected by the biosensor, where the passband wavelength is adjusted according to a tuning voltage of the tunable detector; wherein the tunable detector of the measuring apparatus detects a biochemical interaction occurring on the colorimetric resonant optical biosensor. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification