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1. WO2020197497 - SELF-CALIBRATING SPECTRAL SENSOR MODULES

Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

[ EN ]

CLAIMS

1. A system comprising:

a first light source;

a second light source;

a photodetector; and

an electronic control device operable to:

cause the first light source to emit first light within a range of wavelengths towards a subject;

measure, using the photodetector, the first light reflected from the subject; cause the second light source to emit second light, the second light comprising a plurality of emission peaks within the range of wavelengths;

measure, using the photodetector, the second light; and

determine, based on the measured first light and the measured second light, spectral information regarding the subject.

2. The system of claim 1, wherein the first light is broadband light.

3. The system of claim 1, wherein the wavelengths of the plurality of emission peaks are evenly distributed.

4. The system of claim 1, wherein the electronic control device is operable to determine the spectral information regarding the subject by:

identifying one or more emission peaks of the plurality of emission peaks in the measured second light; and

transforming a representation of the measured first light based on the identified one or more emission peaks.

5. The system of claim 4, wherein the representation of the measured first light comprises a data record indicating spectral components of the measured first light.

6. The system of claim 1, wherein the electronic control device is operable to determine the spectral information regarding the subject by:

determining a difference between the measured second light and the measured first light; and

transforming a representation of the measured first light based on the difference.

7. The system of claim 6, wherein the representation of the measured first light comprises a data record indicating spectral components of the measured first light.

8. The system of claim 1, wherein the electronic control device operable to:

cause the second light source to emit the second light towards the subject, and measure, using the photodetector, the second light reflected from the subject.

9. The system of claim 1, wherein the electronic control device operable to:

cause the second light source to emit the second light towards a light guide optically coupled to the photodetector, and

measure, using the photodetector, the second light emitted from the light guide.

10. The system of claim 1, wherein the second light source comprises one or more dielectric coating filters and a broadband light emitting element.

11. The system of claim 10, wherein the broadband light emitting element comprises an incandescent lamp.

12. The system of claim 1, further comprising a host device, and

wherein the first light source, the second light source, the photodetector, and the electronic control device are disposed, at least in part, in the host device.

13. The system of claim 12, wherein the host device is at least one of a smart phone or a wearable device.

14. A method comprising:

emitting first light within a range of wavelengths towards a subject;

measuring the first light reflected from the subject;

emitting second light, the second light comprising a plurality of emission peaks within the range of wavelengths;

measuring the second light; and

determining, based on the measured first light and the measured second light, spectral information regarding the subject.

15. The method of claim 14, wherein the first light is broadband light.

16. The method of claim 14, wherein the wavelengths of the plurality of emission peaks are evenly distributed.

17. The method of claim 14, wherein determining the spectral information regarding the subject comprises:

identifying one or more emission peaks of the plurality of emission peaks in the measured second light; and

transforming a representation of the measured first light based on the identified one or more emission peaks.

18. The method of claim 17, wherein the representation of the measured first light comprises a data record indicating spectral components of the measured first light.

19. The method of claim 14, wherein determining the spectral information regarding the subject comprises:

determining a difference between the measured second light and the measured first light; and

transforming a representation of the measured first light based on the difference.

20. The method of claim 19, wherein the representation of the measured first light comprises a data record indicating spectral components of the measured first light.

21. The method of claim 14, wherein emitting second light comprises emitting the second light towards the subject, and

wherein measuring the second light comprises measuring the second light reflected from the subject.

22. The method of claim 14, wherein emitting second light comprises emitting the second light towards a light guide, and

wherein measuring the second light comprises measuring the second light emitted from the light guide.