Evanescent scanning of biochemical array
First Claim
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1. An apparatus for detecting a target substance in a pixel array comprising:
- (a) a light source to emit a light suitable for exciting the target substance;
(b) a total internal reflection (TIR) member having a TIR surface on which a pixel array is located, the light from the light source passing into the TIR member and is reflected by the TIR surface, the pixel array being within an evanescent field region at the TIR surface; and
(c) a light detector for detection of light emitted from the pixel array as a result of evanescent excitation of the target substance.
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Abstract
An apparatus for detecting a target substance in a pixel array is provided. The apparatus has a light source to emit a light suitable for exciting the target substance in the array, a total internal reflection (TIR) member, and a light detector. The TIR member has a TIR surface on which the array is located. The light from the light source passes into the TIR member and is reflected by the TIR surface. The array is within an evanescent field region at the TIR surface. The light detector is adapted to detect light emitted from the array as a result of evanescent excitation of the target substance.
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Citations
19 Claims
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1. An apparatus for detecting a target substance in a pixel array comprising:
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(a) a light source to emit a light suitable for exciting the target substance; (b) a total internal reflection (TIR) member having a TIR surface on which a pixel array is located, the light from the light source passing into the TIR member and is reflected by the TIR surface, the pixel array being within an evanescent field region at the TIR surface; and (c) a light detector for detection of light emitted from the pixel array as a result of evanescent excitation of the target substance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of analyzing a pixel array of chemical molecules for a target substance, comprising:
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(a) contacting a chemical array with a sample suspected of containing a target substance to form the pixel array; (b) directing light from a light source to pass into a total internal reflection (TIR) member having a TIR surface and an array surface on which the pixel array is located to result in an evanescent field region such that the pixel array is within the evanescent field region at the TIR surface, thereby causing excitation of the target substance on the pixel array, the light from the light source being reflected from the TIR surface; and (c) detecting light emitted from the pixel array as a result of the excitation of the target substance caused by the evanescent field. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A method of making an apparatus for detecting a target substance on a pixel array comprising:
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(a) mounting a total internal reflection (TIR) member on a support, the TIR member having a TIR surface on which the pixel array can be located, the pixel array being capable of binding the target substance; (b) mounting a light source on the support to irradiate a light suitable for exciting the target substance on a pixel array located on the TIR surface such that the light from the light source passes into the TIR member and is reflected by the TIR surface to result in an evanescent field region, the pixel array being within the evanescent field region at the TIR surface; and (c) mounting a light detector on the support for detecting light emitted from the pixel array as a result of the evanescent excitation of the target substance.
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Specification