Detection device and blood glucose meter

Abstract

This invention relates to the field of blood glucose detection technology, and discloses a detection device and a blood glucose meter, including a substrate, a laser, a first lens, a photosensitive element, and a second lens. The laser is disposed on the substrate and is used to emit laser light. The laser emission direction is inclined to the substrate. The first lens is disposed on the light-emitting side of the laser and is used to receive the laser light emitted by the laser and focus the laser light onto a target object. The target object is used to receive the laser light and emit light, which includes laser light and Raman scattered light. The photosensitive element is disposed on the substrate, and the photosensitive element and the laser are located on the same side of the substrate. The second lens is disposed on the side of the photosensitive element opposite to the substrate and is used to receive the light emitted by the target object and focus the light light onto the photosensitive element. The detection device and blood glucose meter using the embodiments of this invention have a relatively simple optical path, a relatively simple structure, and a small overall size.

Description

Technical Field

[0001] This invention relates to the field of blood glucose detection technology, and more particularly to a detection device and a blood glucose meter. Background Technology

[0002] High blood sugar (glucose in the blood) levels can trigger various acute and long-term complications, such as kidney disease, neurological and circulatory system diseases, cardiovascular disease, blindness, and stroke. Blood sugar testing technologies include invasive, minimally invasive, and non-invasive methods. Invasive and minimally invasive methods can cause pain and discomfort to patients and carry potential risks such as infection.

[0003] Therefore, current blood glucose testing primarily promotes non-invasive methods, using Raman spectroscopy for non-destructive detection of blood glucose in the human body. This involves using a laser to irradiate the patient's skin to generate Raman scattered light, which is then received by a photosensitive element to achieve blood glucose detection.

[0004] However, the optical path of existing detection devices is relatively complex, the structure of the detection devices is relatively complex, and the overall size is relatively large. Summary of the Invention

[0005] This invention discloses a detection device and a blood glucose meter. The detection device has a relatively simple optical path, a relatively simple structure, and a small overall size.

[0006] In a first aspect, embodiments of the present invention disclose a detection device, including a substrate, a laser, a first lens, a photosensitive element, and a second lens. The laser is disposed on the substrate and is used to emit laser light. The emission direction of the laser light is inclined to the substrate. The first lens is disposed on the light-emitting side of the laser and is used to receive the laser light emitted by the laser and focus the laser light onto a target object. The target object is used to receive the laser light and emit light, the light including the laser light and Raman scattered light. The photosensitive element is disposed on the substrate and is located on the same side of the substrate as the laser. The second lens is disposed on the side of the photosensitive element away from the substrate and is used to receive the light emitted by the target object and focus the light onto the photosensitive element.

[0007] As an optional implementation, in this embodiment of the invention, the detection device further includes a mounting member disposed on the substrate, the mounting member having an inclined surface that is inclined to the substrate, the laser being disposed on the inclined surface, and the laser emission direction being perpendicular to the inclined surface.

[0008] As an optional implementation, in this embodiment of the invention, the angle between the inclined surface and the substrate is α, where 30°≤α≤75°.

[0009] As an optional implementation, in this embodiment of the invention, the angle between the incident direction of the laser focused onto the target object and the target object is θ, where 15°≤θ≤60°.

[0010] As an optional implementation, in this embodiment of the invention, the detection device further includes a narrowband filter disposed between the laser and the first lens.

[0011] As an optional implementation, in this embodiment of the invention, the light beam further includes Rayleigh scattered light, and the detection device further includes a notch filter disposed between the second lens and the photosensitive element. The notch filter is used to filter the laser light and the Rayleigh scattered light in the light beam, and to transmit the Raman scattered light to the photosensitive element.

[0012] As an optional implementation, in this embodiment of the invention, the detection device further includes a bandpass filter disposed between the second lens and the photosensitive element.

[0013] As an optional implementation, in this embodiment of the invention, the detection device further includes a plurality of photosensitive elements and a plurality of bandpass filters. The plurality of photosensitive elements are spaced apart on the substrate, and the center wavelengths of the plurality of bandpass filters are different. The plurality of bandpass filters are respectively configured to correspond one-to-one with the plurality of photosensitive elements.

[0014] As an optional implementation, in this embodiment of the invention, the first lens includes one of a Fresnel lens, a diffractive lens, and a superlens, and the second lens includes one of a Fresnel lens, a diffractive lens, and a superlens.

[0015] Secondly, embodiments of the present invention disclose a blood glucose meter, including the detection device of the first aspect.

[0016] Compared with the prior art, the embodiments of the present invention have at least the following beneficial effects:

[0017] In this embodiment of the invention, a laser is mounted on a substrate, emitting laser light with its emission direction tilted towards the substrate. A first lens focuses the laser light onto a target object. The target object then emits light through a second lens, which focuses the light onto a photosensitive element mounted on the substrate. The photosensitive element then receives Raman scattered light from the emitted light, thereby enabling blood glucose detection. Furthermore, because the laser emission direction is tilted towards the substrate, and the light emitted from the target object is focused by the first lens onto the target object, the light is then focused by the second lens onto the photosensitive element. This results in a simpler optical path and structure for the detection device, leading to a smaller overall size. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a detection device disclosed in Embodiment 1 of the present invention;

[0020] Figure 2 This is a simplified structural diagram of a blood glucose meter disclosed in Embodiment 2 of the present invention.

[0021] Explanation of main figure symbols

[0022] 100. Detection device; 10. Substrate; 11. Laser; 12. First lens; 13. Photosensitive element; 14. Second lens; 15. Mounting component; 15a. Inclined surface; 16. Narrowband filter; 17. Notch filter; 18. Bandpass filter; 200. Blood glucose meter; a. Target object. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing the invention and its embodiments, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to be constructed and operated in a specific orientation.

[0025] Furthermore, some of the aforementioned terms, besides indicating direction or positional relationships, may also have other meanings. For example, the term "above" may, in certain circumstances, indicate a dependency or connection. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0026] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0027] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0028] This invention discloses a detection device and a blood glucose meter. The detection device has a relatively simple optical path, a relatively simple structure, and a small overall size.

[0029] Example 1

[0030] Please see Figure 1This is a schematic diagram of a detection device 100 provided in Embodiment 1 of the present invention. The detection device 100 includes a substrate 10, a laser 11, a first lens 12, a photosensitive element 13, and a second lens 14. The laser 11 is disposed on the substrate 10 and is used to emit laser light. The laser emission direction is inclined to the substrate 10. The first lens 12 is disposed on the light-emitting side of the laser 11 and is used to receive the laser light emitted by the laser 11 and focus the laser light onto a target object. The target object is used to receive the laser light and emit light, which includes laser light and Raman scattered light. The photosensitive element 13 is disposed on the substrate 10 and is located on the same side of the substrate 10 as the laser 11. The second lens 14 is disposed on the side of the photosensitive element 13 away from the substrate 10 and is used to receive the light emitted by the target object and focus the light onto the photosensitive element 13.

[0031] In this context, target object 'a' can be the user's skin. A laser is emitted from a laser device onto the user's skin. After reaching the skin's surface, the laser light is absorbed, reflected, and scattered by the skin's constituent substances. Reflection includes the laser light emitted by the device, while scattering includes Rayleigh scattering and Raman scattering. Figure 1 In the diagram, the optical path of the detection device 100 is represented by a dashed line with an arrow.

[0032] For example, the photosensitive element 13 can be an APD (Avalanche Photon Diode) sensor or a SPAD (Single Photon Avalanche Diode) sensor. In this embodiment, the photosensitive element 13 can be an APD as an example.

[0033] In this embodiment, a laser 11 is mounted on a substrate 10. The laser 11 emits laser light, and the laser emission direction is tilted towards the substrate 10. A first lens 12 focuses the laser light onto the target object. After receiving the laser light, the target object emits light to a second lens 14, which then focuses the light onto a photosensitive element 13 mounted on the substrate 10. The photosensitive element 13 then receives the Raman scattered light from the laser, thereby achieving blood glucose detection. Furthermore, in related technologies, the detection device 100 requires multiple mirrors to assist in changing the light path, so that the laser light emitted by the laser 11 can be reflected by the mirrors to the target object, and the light emitted by the target object can be reflected by the mirrors to the photosensitive element 13. The optical path of the detection device 100 is relatively complex, and the use of multiple mirrors results in a complex structure and a large overall size. In this embodiment, the laser emitted by the laser 11 is inclined to the substrate 10. After the laser is focused to the target object by the first lens 12, the light emitted from the target object can be focused to the second lens 14 and then focused to the photosensitive element 13 by the second lens 14. The optical path of the detection device 100 is relatively simple, the structure of the detection device 100 is relatively simple, and the overall volume is small.

[0034] The laser 11 can be a vertical-cavity surface-emitting laser (VCSEL), which can emit multiple infrared spots simultaneously. Alternatively, the laser 11 can be an edge-emitting laser, which can emit a single infrared spot. In this case, the detection device 100 also needs to be equipped with diffractive optical elements to diffuse the single infrared spot, thereby increasing the number of infrared spots and achieving the emission of multiple infrared spots in a single operation.

[0035] In some embodiments, the detection device 100 further includes a mounting member 15 disposed on the substrate 10. The mounting member 15 has an inclined surface 15a, which is inclined to the substrate 10. The laser 11 is disposed on the inclined surface 15a, and the laser emission direction is perpendicular to the inclined surface 15a. Thus, on the one hand, by mounting the laser 11 on the substrate 10 using the inclined surface 15a of the mounting member 15, the laser 11 can be stably mounted on the substrate 10. On the other hand, by using the inclined surface 15a of the mounting member 15 to be inclined to the substrate 10, the laser emission direction emitted by the laser 11 is perpendicular to the inclined surface 15a. Therefore, the laser emission direction is inclined to the substrate 10, and the tilt angle of the laser emission direction can be determined by the tilt angle between the inclined surface 15a and the substrate 10. This tilt angle can be controlled through processing and assembly, making the tilt angle of the laser emission direction controllable.

[0036] Optionally, the angle between the inclined surface 15a and the substrate 10 is α, where 30°≤α≤75°. Thus, by forming an angle α between the inclined surface 15a and the substrate 10, the laser beam emitted perpendicularly to the inclined surface 15a is focused by the first lens 12 onto the target object. The angle between the incident direction of the laser beam and the target object is θ, and θ=90°-α. That is, 30°≤90°-θ≤75°, and therefore 15°≤θ≤60°. If α<30°, then θ>60°. In this case, the angle θ between the incident direction of the laser beam and the target object is large. Given the same distance d between the laser 11 and the photosensitive element 13, a larger distance L is required between the laser 11 and the target object to focus the light emitted from the target object onto the photosensitive element 13, resulting in a longer operating distance L for the detection device 100. If α > 75°, then θ < 60°. In this case, the angle θ between the incident direction of the laser and the target object is large. When the distance L between the laser 11 and the target object is the same, the distance d between the laser 11 and the photosensitive element 13 is large, and the overall volume of the detection device 100 is large.

[0037] Therefore, the angle α between the inclined surface 15a and the substrate 10 can be 30°≤α≤75°, and the angle θ between the incident direction of the laser focused on the target object and the target object can be 15°≤θ≤60°. The detection device 100 has a short operating distance L and a small distance d between the laser 11 and the photosensitive element 13, resulting in a small overall size of the detection device 100. The angle α can be 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, etc., and the angle θ can be 15°, 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, etc., but this embodiment does not specifically limit these values.

[0038] In some embodiments, the detection device 100 further includes a narrowband filter 16 disposed between the laser 11 and the first lens 12. Thus, by placing the narrowband filter 16 between the laser 11 and the second lens 14, stray light of other wavelengths is filtered out, allowing the laser emitted by the laser 11 to be directed to the first lens 12, reducing the influence of stray light and improving the sensitivity of blood glucose detection.

[0039] For example, the light also includes Rayleigh scattered light, and the detection device 100 further includes a notch filter 17, which is disposed between the second lens 14 and the photosensitive element 13. The notch filter 17 is used to filter out laser light and Rayleigh scattered light in the light, and to transmit Raman scattered light to the photosensitive element 13. In this way, by filtering laser light and Rayleigh scattered light by the notch filter 17, interference caused by laser light and Rayleigh scattered light can be avoided, the signal-to-noise ratio of the Raman spectrum can be improved, thereby improving the sensitivity of blood glucose detection.

[0040] In some embodiments, the detection device 100 further includes a bandpass filter disposed between the second lens 14 and the photosensitive element 13. Thus, by using a bandpass filter to filter stray light, Raman scattered light of a specific wavelength or bandwidth is directed to the photosensitive element 13, thereby obtaining a specific characteristic peak.

[0041] For example, the detection device 100 includes multiple photosensitive elements 13 and multiple bandpass filters. The multiple photosensitive elements 13 are spaced apart on the substrate 10, and the multiple bandpass filters have different center wavelengths. Each bandpass filter corresponds to one of the multiple photosensitive elements 13. In this way, by using multiple bandpass filters with different center wavelengths to filter stray light, Raman scattered light of different specific wavelengths is directed to different photosensitive elements 13. This allows the collection of Raman characteristic peak intensities of multiple specific wavelengths, improving the accuracy of blood glucose detection. For example, the detection device 100 has four bandpass filters and four photosensitive elements 13. The four photosensitive elements 13 can be arranged in a 2x2 configuration to collect the Raman characteristic peak intensities of four characteristic wavelengths, including three characteristic peaks of glucose and one characteristic peak of hemoglobin. Specifically, the center wavelengths of the four bandpass filters can be 845.5 nm, 865.6 nm, 861 nm, and 893.5 nm, respectively, with a bandwidth of 0.5 nm. Then, the three characteristic peaks of glucose can be collected at 911 cm⁻¹, 993.5 nm, and 893.5 nm, respectively. -1 1060cm -1 1125cm -1 And a characteristic peak of hemoglobin is 1549 cm⁻¹. -1 .

[0042] Optionally, the first lens 12 includes one of a Fresnel lens, a diffractive lens, and a superlens, and the second lens 14 includes one of a Fresnel lens, a diffractive lens, and a superlens. This embodiment provides a variety of first lenses 12 and second lenses 14 with different structures, which can be selected according to actual conditions. This embodiment does not make specific limitations on this.

[0043] Embodiment 1 of the present invention provides a detection device 100. A laser 11 is disposed on a substrate 10. The laser 11 emits laser light, and the laser emission direction is tilted towards the substrate 10. A first lens 12 focuses the laser light onto a target object. After receiving the laser light, the target object emits light to a second lens 14, which then focuses the light onto a photosensitive element 13 disposed on the substrate 10. The photosensitive element 13 then receives Raman scattered light from the laser light, thereby realizing blood glucose detection. Furthermore, since the laser emitted by the laser 11 is tilted towards the substrate 10, and the light emitted by the target object is focused by the first lens 12 onto the target object, the light emitted by the target object can reach the second lens 14 and be focused onto the photosensitive element 13. The optical path of the detection device 100 is relatively simple, the structure of the detection device 100 is relatively simple, and the overall size is small.

[0044] Example 2

[0045] Please see Figure 2 This is a simplified structural diagram of a blood glucose meter 200 provided in Embodiment 2 of the present invention. The blood glucose meter 200 includes the detection device 100 of Embodiment 1.

[0046] Embodiment 2 of the present invention provides a blood glucose meter 200, the optical path of its detection device 100 is relatively simple, the structure of the detection device 100 is relatively simple, and the overall volume is small, which is conducive to the miniaturization design of the blood glucose meter 200.

[0047] The above provides a detailed description of a detection device and blood glucose meter disclosed in the embodiments of the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the detection device and blood glucose meter of the present invention and its core ideas. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A detection device, characterized in that, include: substrate; A laser, the laser being disposed on the substrate, the laser being used to emit laser light, the laser emission direction being inclined to the substrate; A first lens is disposed on the light-emitting side of the laser. The first lens is used to receive the laser emitted by the laser and focus the laser onto a target object. The target object is used to receive the laser and emit light, the light including the laser and Raman scattered light. A photosensitive element, wherein the photosensitive element is disposed on the substrate, and the photosensitive element and the laser are located on the same side of the substrate; and The second lens is disposed on the side of the photosensitive element away from the substrate. The second lens is used to receive the light emitted from the target object and converge the light to the photosensitive element. The Raman scattered light in the light received by the photosensitive element is used to detect blood glucose in the target object.

2. The detection device according to claim 1, characterized in that, The detection device further includes a mounting component disposed on the substrate. The mounting component has an inclined surface that is inclined to the substrate. The laser is disposed on the inclined surface, and the laser emission direction is perpendicular to the inclined surface.

3. The detection device according to claim 2, characterized in that, The angle between the inclined surface and the substrate is α, where 30°≤α≤75°.

4. The detection device according to claim 1, characterized in that, The angle between the incident direction of the laser beam focused onto the target object and the target object is θ, where 15°≤θ≤60°.

5. The detection device according to any one of claims 1 to 4, characterized in that, The detection device also includes a narrowband filter, which is disposed between the laser and the first lens.

6. The detection device according to any one of claims 1 to 4, characterized in that, The light also includes Rayleigh scattered light, and the detection device further includes a notch filter disposed between the second lens and the photosensitive element. The notch filter is used to filter the laser light and the Rayleigh scattered light in the light, and to transmit the Raman scattered light to the photosensitive element.

7. The detection device according to any one of claims 1 to 4, characterized in that, The detection device further includes a bandpass filter, which is disposed between the second lens and the photosensitive element.

8. The detection device according to claim 7, characterized in that, The detection device includes a plurality of photosensitive elements and a plurality of bandpass filters. The plurality of photosensitive elements are spaced apart on the substrate. The plurality of bandpass filters have different center wavelengths and are respectively arranged in a one-to-one correspondence with the plurality of photosensitive elements.

9. The detection device according to any one of claims 1 to 4, characterized in that, The first lens includes one of a Fresnel lens, a diffractive lens, and a superlens, and the second lens includes one of a Fresnel lens, a diffractive lens, and a superlens.

10. A blood glucose meter, characterized in that, Includes the detection device as described in any one of claims 1 to 9.

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