Portable spectrometer for chemical sensing

Patent metadata

Field	Value
Publication number	US-11692942-B2
Application number	US-202016999667-A
Country	US
Kind code	B2
Filing date	Aug 21, 2020
Priority date	Aug 22, 2019
Publication date	Jul 4, 2023
Grant date	Jul 4, 2023

Abstract

Techniques are disclosed for a chemical sensor architecture based on a fabric-based spectrometer. An example apparatus implementing the techniques includes a portable spectrometer device including a first fabric layer and a second fabric layer coupled to the first fabric layer to form a pouch. The second fabric layer includes a fiber fabric spectrometer substrate comprising a fiber material including one or more electronic devices, wherein the pouch is configured to receive a colorimetric substrate and the fiber fabric spectrometer substrate is configured to measure reflectance of a colorimetric substrate disposed in the pouch.

First claim

What is claimed is:

1. A portable spectrometer device comprising:
a first fabric layer;
a control component; and
a second fabric layer coupled to the first fabric layer to form a pouch, the second fabric layer comprising a fiber fabric spectrometer substrate comprising a fiber material including one or more electronic devices coupled to the control component programmed to measure reflectance of a removable colorimetric substrate inserted into the pouch, wherein
the control component is disposed in the pouch, the control component coupled to the fiber fabric spectrometer substrate and configured to control at least one of the one or more electronic devices of the fiber fabric spectrometer substrate.

2. The portable spectrometer device of claim 1 , wherein a surface of the removable colorimetric substrate is disposed over a surface of the fiber fabric spectrometer substrate.

3. The portable spectrometer device of claim 1 , wherein the removable colorimetric substrate comprises at least one colorimetric sensor element, the at least one colorimetric sensor element configured to undergo an electronic structure change upon reaction with an analyte.

4. The portable spectrometer device of claim 1 , further comprising means for aligning the removable colorimetric substrate with the fiber fabric spectrometer substrate.

5. The portable spectrometer device of claim 1 , further comprising means for calibrating the fiber fabric spectrometer substrate.

6. The portable spectrometer device of claim 1 , wherein:
the one or more electronic devices comprise a plurality of light emitting diodes (LEDs) and a plurality of photodiodes; and
the removable colorimetric substrate is disposed such that at least some of the plurality of light emitting diodes (LEDs) and the plurality of photodiodes face the removable colorimetric substrate.

7. The portable spectrometer device of claim 1 , wherein the one or more electronic devices comprise at least one of: a plurality of light emitting diodes (LEDs); and a plurality of photodiodes.

8. The portable spectrometer device of claim 7 , wherein the plurality of LEDs emit frequency modulated light onto the removable colorimetric substrate.

9. The portable spectrometer device of claim 7 , wherein the plurality of photodiodes detects reflectance of light from the removable colorimetric substrate.

10. The portable spectrometer device of claim 7 , wherein the plurality of photodiodes comprises one of silicon (Si) photodiodes or indium gallium arsenide (InGaAs) photodiodes.

11. The portable spectrometer device of claim 7 , wherein the one or more electronic devices comprise at least one red, green, blue (RGB) LED-photodiode (PD) quartet, the at least one RGB LED-PD quartet configured to detect reflectance of light from the removable colorimetric substrate.

12. The portable spectrometer device of claim 1 , further comprising a light blocking substrate configured to reduce ambient light intensity, the light blocking substrate disposed such that the removable colorimetric substrate is between the fiber fabric spectrometer substrate and the light blocking substrate.

13. The portable spectrometer device of claim 1 , wherein the removable colorimetric substrate is comprised of a fabric, paper, or glass.

Assignees

• Massachusetts Inst Technology

Inventors

• Kingsborough Richard
• Stolyarov Alexander
• Tysk Shane
• Cantley Lauren

Classifications

• G01N2021/7773

  Reflection · CPC title

• G01N2201/0627

  Use of several LED's for spectral resolution · CPC title

• G01N21/31

  Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry {(G01N21/72 takes precedence)} · CPC title

• G01N2021/7756

  Sensor type · CPC title

• G01N21/78 Primary

  producing a change of colour · CPC title