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US 12,215,263 B2Granted
Tracer composition
AssigneeChelsea Technologies Ltd
InventorsJerry Cross, Charles Whitfield, John Attridge
Life of this patent
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Abstract
The disclosure provides a tracer composition. The composition comprises a fluorescent molecule which fluoresces when exposed to an excitation wavelength, and thereby emit a photon with a wavelength between 400 and 600 nm; and a gelling agent.
Claims18
A food safe tracer composition, the composition comprising:
- (i) a food safe fluorescent molecule which fluoresces when exposed to an excitation wavelength, and thereby emits a photon with a wavelength between 400 and 600 nm,
- wherein the food safe fluorescent molecule is a compound of formula (I):
- wherein each of R1 to R8 is independently hydrogen or a C1-5 alkyl, or a salt and/or solvate thereof;
- (ii) a stabilizing agent configured to improve the photostability of the fluorescent molecule, wherein the stabilizing agent comprises thiosulfuric acid or a salt and/or solvate thereof or a compound of formula (II):
- wherein each of R9 to R12 is independently hydrogen or a C1-5 alkyl or a salt and/or solvate thereof;
- and
- (iii) a gelling agent, wherein the gelling agent comprises a saccharide and an alcohol, and the weight ratio of the saccharide to the alcohol is between 1:10 and 10:1.
4 more elements
An apparatus comprising:
- a dual wavelength light emitting device to selectively illuminate a surface at a first wavelength and to selectively illuminate the surface at a second wavelength, wherein the surface has a material thereon and wherein the first wavelength is in the range of 400 to 500 nm and the second wavelength is in the range of 500 to 600 nm;
- a camera sensor for generating a first fluorescence image in response to the illumination of said surface at the first wavelength and a first visual image in response to the illumination of said surface at the second wavelength;
- and
- a processor configured to process the first visual image to generate a mask indicative of an area of the first visual image;
- generate a second fluorescence image by masking the first fluorescence image using the mask;
- and process the second fluorescence image to determine a coverage information and/or a dosage information of said material.
3 more elements
A method comprising:
- selectively illuminating a surface at a first wavelength, wherein the surface has a material thereon and the first wavelength is in the range of 400 to 500 nm;
- generating a first fluorescence image of said surface in response to the illumination at the first wavelength;
- selectively illuminating the surface at a second wavelength, wherein the second wavelength is in the range of 500 to 600 nm;
- generating a first visual image of said surface in response to the illumination at the second wavelength;
- processing the first visual image to generate a mask indicative of an area of the first visual image;
- generating a second fluorescence image by masking the first fluorescence image using the mask;
- and
- processing the second fluorescence image to determine a coverage information and/or a dosage information of said material.
5 more elements
Dependencies are inferred from the claim text.