Multiband diffuse reflection near-infrared light-emitting photographing apparatus and data acquisition method

Abstract

The present invention relates to a multiband diffuse reflection near-infrared light-emitting photographing apparatus and a data acquisition method using same. The apparatus comprises a transmitting module and a receiving module. The transmitting module comprises at least one light source element and at least one concave mirror for converging light emitted by the light source element; the light source elements are in one-to-one correspondence with the concave mirrors; and the light source elements are arranged on a light source circuit board and sequentially emit near-infrared light of respective wavelengths. The receiving module comprises a band-pass filter and a photoelectric sensor; an optical signal emitted by the light source element of the transmitting module sequentially passes through the concave mirror, a part to be tested, the band-pass filter and the photoelectric sensor; and the optical signal passing through the band-pass filter is near-infrared light diffusely reflected by said part. According to the apparatus provided by the present invention, light sources can be uniformly converged in effective illumination areas, and the interference of other near-infrared light and visible light among ambient light is eliminated, thereby reducing the noise, and further improving the testing accuracy.

Description

A multi-band diffuse reflection near-infrared luminescence shooting device and data acquisition method Technical Field

[0001] The present invention relates to the fields of medical devices and non-invasive detection, and in particular to a multi-band diffuse reflection near-infrared luminescence shooting device and a data acquisition method. Background Art

[0002] Leveraging the unique physical properties of near-infrared light to collect data and then analyze it has been widely applied. In particular, near-infrared spectroscopy (NIRS) and near-infrared chemical imaging (NIRCI) analysis techniques are being used to detect medical indicators for a variety of diseases. Their advantages include being non-invasive, painless, consumable-free, and rapid, effectively overcoming the drawbacks of conventional invasive testing methods. This facilitates the screening, diagnosis, prevention, and treatment of a wide range of diseases, and possesses enormous social and medical benefits. Both physical theory and experiments have demonstrated that transmission near-infrared spectroscopy and near-infrared chemical imaging carry effective information on the concentration of the test component in blood, which can be used for quantitative analysis.

[0003] However, the technical solutions provided by the existing technology for non-invasive detection using NIRS or NIRCI analysis technology cannot achieve the characteristics of high brightness, multi-band, low noise, etc. while the non-invasive detection device meets the requirements of convergence, uniform brightness in the effective lighting area, high light energy utilization, and good structural stability.

[0004] Summary of the Invention

[0005] In view of the above-mentioned defects of the prior art, the purpose of the present invention is to provide a multi-band diffuse reflection near-infrared luminescence imaging device, which can solve at least one of the above-mentioned problems.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A multi-band diffuse reflection near-infrared luminescence shooting device, characterized in that:

[0008] Includes a transmitting module and a receiving module;

[0009] The transmitting module includes at least one light source element and at least one concave mirror for converging the light emitted by the light source element; the light source elements correspond to the concave mirrors one by one, that is, each light source element is equipped with one or more concave mirrors, and the installation position of the concave mirror is determined according to the installation position of the light source element. Preferably, one light source element corresponds to one concave mirror and is installed at the center of the concave surface of the corresponding concave mirror.

[0010] The light source elements are arranged on a light source circuit board and emit near-infrared light of their respective wavelengths in sequence. The near-infrared light emitted by the light source elements is near-infrared light of a pre-selected wavelength. The concave mirror enables the near-infrared light irradiation area of ​​the light source element to evenly cover the part to be measured. Specifically, the concave mirror can adjust the optical path of the near-infrared light emitted by the light source element so that the adjusted near-infrared light is evenly concentrated in a designated area of ​​the part to be measured.

[0011] The receiving module includes a bandpass filter and a photoelectric sensor; the path through which the light emitted by the light source element of the transmitting module passes is the concave mirror, the part to be measured, the bandpass filter and the photoelectric sensor in sequence;

[0012] The light passing through the bandpass filter is near-infrared light diffusely reflected by the part to be measured.

[0013] In some embodiments, the light source element emits light of only one wavelength, and the wavelengths of light emitted by the plurality of light source elements may be the same or different; only the light source elements emitting light of the same wavelength are turned on at the same time.

[0014] In some embodiments, the light source element can emit light of several different wavelengths, and only emit light of one wavelength at a time; at the same time, the light emitted by several light source elements has the same wavelength.

[0015] In some embodiments, the photoelectric sensor is a distortion-free macro photography photoelectric sensor. A distortion-free macro photography photoelectric sensor refers to a photoelectric sensor that can perform distortion-free imaging in macro scenes. Organic photoelectric sensors (OPDs) are one of the most commonly used ones.

[0016] In some embodiments, the bandpass filter neither allows light with a wavelength smaller than the minimum wavelength emitted by the light source element to pass through, nor allows light with a wavelength larger than the maximum wavelength emitted by the light source element to pass through.

[0017] In some embodiments, a light hole is provided in the middle of the light source circuit board, and the light diffusely reflected by the part to be measured passes through the light hole, is filtered by the bandpass filter and finally reaches the photoelectric sensor; the light source element and the concave mirror are arranged around the periphery of the light hole.

[0018] In some embodiments, a centrally symmetrical annular belt is provided around the light hole, on which the light source element and the concave mirror are mounted; the annular belt is circular or square, etc., and most of the electronic circuits are arranged outside the annular belt of the light source circuit board.

[0019] In some embodiments, the light source element is an LED near-infrared lamp or a LD near-infrared lamp, and the wavelength of the emitted light is between 750 and 2250 nm.

[0020] In some embodiments, the bandpass filter can allow light in any wavelength range of 750 to 2250 nm to pass through according to the needs of actual application. The bandpass filter is arranged between the light hole and the photoelectric sensor, preferably at the light hole to save equipment space.

[0021] In some embodiments, the photosensor is an organic photosensor (OPD) and can capture near-infrared images in any wavelength range from 750 nm to 2250 nm, depending on the application requirements. These OPDs offer mechanical flexibility, ease of fabrication, adjustable photoelectric properties, and excellent light sensing performance. Because OPDs have low imaging distance requirements, they eliminate the need for lens focusing for macro imaging.

[0022] In some embodiments, the light source element is an LED near-infrared lamp or an LD near-infrared lamp, and the wavelength of the emitted light is between 750 and 1100 nm; the bandpass filter allows light in any wavelength range between 750 and 1100 nm to pass through; the photoelectric sensor is an organic photoelectric sensor and can capture near-infrared images in any wavelength range between 750 and 1100 nm according to application requirements; the multi-band diffuse reflection near-infrared luminescence shooting device is used to measure the user's blood sugar index and hemoglobin concentration of anemia, etc.

[0023] In some embodiments, the light source element is an LED near-infrared lamp or an LD near-infrared lamp, and the wavelength of the emitted light is between 1550 and 1650 nm; the bandpass filter allows light in any wavelength range between 1550 and 1650 nm to pass through; the photoelectric sensor is an organic photoelectric sensor and can capture near-infrared images in any wavelength range between 1550 and 1650 nm according to application requirements; the multi-band diffuse reflection near-infrared luminescence shooting device is used to measure the user's uric acid index.

[0024] The present invention also provides a method for collecting data using the multi-band diffuse reflection near-infrared luminescence imaging device described above, wherein the collecting steps are as follows:

[0025] After the part to be tested is placed, the transmitting module and the photoelectric sensor are activated;

[0026] The light source elements sequentially emit near-infrared light of respective wavelengths, and at the same time, the wavelengths of the light emitted by the light source elements are the same;

[0027] The photoelectric sensor sequentially captures multiple frames of near-infrared images of the part to be measured after the near-infrared light of the wavelength is diffusely reflected by the part to be measured, in accordance with the timing of the light source element emitting near-infrared light of the respective wavelengths in sequence.

[0028] At least one frame is selected from the near-infrared image of the part to be measured and pre-processed using an external processor, and the processed near-infrared image of the part to be measured is used as a data set for subsequent applications.

[0029] The near-infrared image of the part to be measured includes but is not limited to photos, videos and spectrograms. The method can be used to collect near-infrared photos, continuous videos and spectrograms, etc.

[0030] Preferably, after the photoelectric sensor collects the near-infrared image of the part to be measured at the previous wavelength and confirms that the image can meet the collection purpose, it sends a feedback signal to switch the light source element that emits near-infrared light of the previous wavelength to the light source element that emits near-infrared light of the next wavelength, until the near-infrared light images at all wavelengths are collected.

[0031] The present invention also provides another multi-band diffuse reflection near-infrared luminescence shooting device, which includes a transmitting module and a receiving module;

[0032] The transmitting module includes at least one light source element and at least one concave mirror for converging the light emitted by the light source element; the light source elements correspond to the concave mirrors one by one, that is, each light source element is equipped with one or more concave mirrors, and the installation position of the concave mirror is determined according to the installation position of the light source element. Preferably, one light source element corresponds to one concave mirror and is installed at the center of the concave surface of the corresponding concave mirror.

[0033] The at least one light source element is arranged on a light source circuit board and emits near-infrared light of its own wavelength in sequence. The near-infrared light emitted by the light source element is near-infrared light of a pre-selected wavelength. The concave mirror enables the near-infrared light irradiation area of ​​the light source element to evenly cover the part to be measured. Specifically, the concave mirror can adjust the optical path of the near-infrared light emitted by the light source element so that the adjusted near-infrared light is evenly concentrated in a designated area of ​​the part to be measured.

[0034] The receiving module includes a bandpass filter, a receiving end optical lens group and a photoelectric sensor;

[0035] The path through which the light signal emitted by the light source element of the transmitting module passes is, in sequence, the concave mirror, the part to be measured, the bandpass filter, the receiving end optical lens group, and the photoelectric sensor;

[0036] The optical signal passing through the bandpass filter is near-infrared light diffusely reflected by the part to be measured.

[0037] In some embodiments, the light source element emits light of only one wavelength, and the wavelengths of light emitted by the plurality of light source elements may be the same or different; only the light source elements emitting light of the same wavelength are turned on at the same time.

[0038] In some embodiments, the light source element can emit light of several different wavelengths, and only emit light of one wavelength at a time; at the same time, the light emitted by several light source elements has the same wavelength.

[0039] In some embodiments, the photosensor is a complementary metal oxide semiconductor (CMOS) photosensor.

[0040] In some embodiments, the bandpass filter neither allows light with a wavelength smaller than the minimum wavelength emitted by the light source element to pass through, nor allows light with a wavelength larger than the maximum wavelength emitted by the light source element to pass through.

[0041] In some embodiments, a light hole is provided in the middle of the light source circuit board, and the light diffusely reflected by the part to be measured passes through the light hole, is filtered by the bandpass filter and reaches the photoelectric sensor; the light source element and the concave mirror are arranged around the periphery of the light hole.

[0042] In some embodiments, a centrally symmetrical annular belt is provided around the light-through hole, on which the light source element and the concave mirror are mounted.

[0043] In some embodiments, the receiving module further includes a spectroscopic filter and a camera board; the receiving end optical lens group includes a wide-angle lens and a receiving end convex lens; an imaging channel is formed between the wide-angle lens and the camera board, and the spectroscopic filter is disposed within the imaging channel; the camera board is a circuit board on which the photoelectric sensor is mounted, is associated with the transmitting module, and can be connected to an external processor to receive instructions from the processor to complete tasks such as shooting, data acquisition, and data set analysis and transmission;

[0044] The path through which the light emitted by the light source element of the transmitting module passes is, in sequence, the concave mirror, the part to be measured, the bandpass filter, the wide-angle lens, the receiving end convex lens, the spectroscopic filter, and the photoelectric sensor.

[0045] In some embodiments, the light source element is an LED near-infrared lamp or a LD near-infrared lamp, and the wavelength of the emitted light is between 750 and 2250 nm.

[0046] In some embodiments, the bandpass filter can allow light in any wavelength range of 750 to 2250 nm to pass through according to actual application needs.

[0047] In some embodiments, the photoelectric sensor is an indium gallium arsenide detector, and can capture near-infrared images in any wavelength range between 750 nm and 2250 nm according to application requirements.

[0048] In some embodiments, the spectroscopic filter is a linear gradient filter and allows light in any wavelength range of 750 to 2250 nm to pass through.

[0049] In some embodiments, the light source element is an LED near-infrared lamp or an LD near-infrared lamp, and the wavelength band of the emitted light is between 750 and 1100 nm; the bandpass filter allows light in any wavelength range between 750 and 1100 nm to pass through; the spectroscopic filter is a linear gradient filter, and allows light in any wavelength range between 750 and 1100 nm to pass through; the photoelectric sensor is an indium gallium arsenide detector, which is black and white and can capture near-infrared images in any wavelength range between 750 and 1100 nm according to application requirements; the multi-band diffuse reflection near-infrared luminescence shooting device is used to measure the user's blood sugar index and hemoglobin concentration of anemia, etc.

[0050] In some embodiments, the light source element is an LED near-infrared lamp or an LD near-infrared lamp, and the wavelength of the emitted light is between 1550 and 1650 nm; the bandpass filter allows light in any wavelength range between 1550 and 1650 nm to pass through; the spectroscopic filter is a linear gradient filter, and allows light in any wavelength range between 1550 and 1650 nm to pass through; the photoelectric sensor is an indium gallium arsenide detector, which is black and white and can capture near-infrared images in any wavelength range between 1550 and 1650 nm according to application requirements; the multi-band diffuse reflection near-infrared luminescence shooting device is used to measure the user's uric acid index.

[0051] The present invention also provides a method for collecting data using another multi-band diffuse reflection near-infrared luminescence imaging device as described above, wherein the collection steps are as follows:

[0052] After the part to be tested is placed, the transmitting module and the photoelectric sensor are activated through the camera board;

[0053] The light source elements sequentially emit near-infrared light of respective wavelengths, and at the same time, the wavelengths of the light emitted by the light source elements are the same;

[0054] The photoelectric sensor sequentially captures multiple frames of near-infrared images of the part to be measured after the near-infrared light of the wavelength is diffusely reflected by the part to be measured, in accordance with the timing of the light source element emitting near-infrared light of the respective wavelengths in sequence.

[0055] At least one frame is selected from the near-infrared image of the part to be measured and pre-processed using an external processor, and the processed near-infrared image of the part to be measured is used as a data set for subsequent applications.

[0056] The near-infrared image of the part to be measured includes but is not limited to photos, videos and spectrograms. The method can be used to collect near-infrared photos, continuous videos and spectrograms, etc.

[0057] Preferably, after the photoelectric sensor collects the near-infrared image of the part to be measured at the previous wavelength and confirms that the image can meet the collection purpose, it sends a feedback signal to switch the light source element that emits near-infrared light of the previous wavelength to the light source element that emits near-infrared light of the next wavelength, until the near-infrared light images at all wavelengths are collected.

[0058] Beneficial effects of the present invention:

[0059] The multiple light source elements on the multi-band diffuse reflection near-infrared luminescence shooting device provided by the present invention can respectively and sequentially emit near-infrared light of different wavelengths, and can realize the collection of multiple groups of detection data at different wavelengths in one detection, which helps to improve the detection accuracy; in addition, the shooting device appropriately arranges the light source elements on the light source circuit board so that the overlapping parts of the illumination areas of all light source elements cover the area to be measured, reducing the error caused by the different positions of the light source elements when collecting multi-band data, and a concave mirror is provided in front of each light source element, so that the light source can achieve uniformity while meeting the convergence requirements, that is, it can eventually converge evenly in the detection area, thereby improving the detection accuracy; and a bandpass filter is provided in the receiving module, which only allows near-infrared light in a specific band range emitted by the light source component to pass through and filters out other light, eliminating the interference of other near-infrared light and visible light in the ambient light, reducing noise, and further improving the detection accuracy.

[0060] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] Figure 1 is a schematic diagram of the structure of a multi-band diffuse reflection near-infrared luminescence shooting device

[0062] Figure 2 is a schematic diagram of the optical path of a multi-band diffuse reflection near-infrared luminescence shooting device

[0063] Figure 3 is a side view of the light source circuit board

[0064] Figure 4 is a top view of the light source circuit board

[0065] Figure 5 is a top view of the back of the light source circuit board

[0066] FIG6 is a flow chart of data acquisition using a multi-band near-infrared luminescence imaging device

[0067] FIG7 is another flow chart of data acquisition using a multi-band near-infrared luminescence imaging device

[0068] FIG8 is a schematic diagram of the structure and optical path of another multi-band diffuse reflection near-infrared luminescence imaging device

[0069] In the figure, 1, light source element, 2, light source circuit board, 3, concave mirror, 4, light hole, 5, part to be measured, 6, bandpass filter, 7, photoelectric sensor, 8, annular belt, 91, wide-angle lens, 92, receiving end convex lens, 93, imaging channel, 94, spectroscopic filter, 95, CMOS photoelectric sensor, 96 camera board DETAILED DESCRIPTION

[0070] In order to make the technical means, creative features, objectives and effects of the invention easier to understand, the invention is further described below with reference to specific diagrams. However, the invention is not limited to the following implementation cases.

[0071] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them. They are not used to limit the conditions under which the present invention can be implemented. Therefore, they have no substantive technical significance. Any modification of the structure, change in the proportion relationship or adjustment of the size should still fall within the scope of the technical content disclosed in the present invention without affecting the efficacy and purpose that can be achieved by the present invention.

[0072] One embodiment of the present invention, as shown in Figures 1 to 5, is a multi-band diffuse reflection near-infrared luminescence imaging device, which includes a transmitting module and a receiving module.

[0073] As shown in Figures 1 to 3, the transmitting module includes four light source elements 1, a light source circuit board 2, and a concave mirror 3. In this embodiment, the light source elements are LED lamps. The four light source elements 1 are symmetrically arranged on the square light source circuit board 2 and emit near-infrared light of their respective wavelengths in sequence. The light source element 1 only emits light of one wavelength. The wavelengths of light emitted by several light source elements 1 can be the same or different. At the same time, only the light source elements 1 emitting light of the same wavelength are turned on. In this embodiment, One light source element 1 emits light of only one wavelength, and the wavelengths of light emitted by the four light source elements 1 are different, that is, the four light source elements 1 emit light of four different wavelengths respectively and in sequence.

[0074] A light source element 1 is equipped with a concave mirror 3 to respectively converge the light emitted by the light source element 1. The light source element 1 is installed on the concave surface of the concave mirror 3; the concave mirror 3 enables the near-infrared light irradiation area of ​​the light source element 1 to evenly cover the part to be measured. Specifically, the concave mirror 3 can adjust the optical path of the near-infrared light emitted by the light source element 1 so that the adjusted near-infrared light is evenly converged on the designated area of ​​the part to be measured 5. The part to be measured 5 in this embodiment is the skin on the user's wrist.

[0075] As shown in Figures 4 and 5, a light hole 4 (the dark gray part in the middle of Figures 4 and 5) is provided at the center of the light source circuit board 2, and a centrally symmetrical circular ring belt 8 is provided around the light hole 4, on which four light source elements 1 and four concave mirrors 3 are mounted. Most of the electronic circuits are arranged outside the ring belt 8 of the light source circuit board 2.

[0076] As shown in Figures 1 and 2, the receiving module includes a bandpass filter 6 and a photoelectric sensor 7. The bandpass filter 6 is provided between the light hole 4 and the photoelectric sensor 7, and is preferably provided at the light hole 4 to save equipment space. The bandpass filter 6 does not allow light with a wavelength less than the minimum wavelength emitted by the light source element 1 to pass through, nor does it allow light with a wavelength greater than the maximum wavelength emitted by the light source element 1 to pass through. The photoelectric sensor 7 is a photoelectric sensor for distortion-free macro photography. In this embodiment, the photoelectric sensor is an organic photoelectric sensor (OPD). The organic photoelectric sensor has the characteristics of mechanical flexibility, easy processing, adjustable photoelectric characteristics, and excellent light sensing performance. Since the organic photoelectric sensor has low requirements for the imaging object distance, it is not necessary to use a lens for focusing when using it for macro imaging.

[0077] It should be noted that in Figures 1 to 3, the two light source elements 1 and the corresponding two concave mirrors 3 located before and after the light hole 4 are omitted in order to show the position of the light hole 4 (in the dotted box). The black rectangle in Figures 1 and 2 is the bandpass filter 6 located at the light hole 4.

[0078] As shown in Figure 2 (the solid and dotted light paths represent the routes of light emitted by the left and right LED lamp beads, respectively), the path through which the light signal emitted by the light source element 1 of the transmitting module passes is, in sequence, the concave mirror 3, the part to be measured 5, the light hole 4, the bandpass filter 6 and the photoelectric sensor 7; the light signal passing through the bandpass filter 6 is the near-infrared light diffusely reflected by the part to be measured 5.

[0079] In some embodiments, as shown in FIG8 , the receiving module further includes a spectroscopic filter 94, a camera board 96, and a receiving optical lens assembly. The receiving optical lens assembly includes a wide-angle lens 91 and a receiving convex lens 92. An imaging channel 93 is formed between the wide-angle lens 91 and the camera board 96, and the spectroscopic filter 94 is disposed within the imaging channel. The camera board 96 is a circuit board on which a photoelectric sensor is mounted. The camera board 96 is associated with the transmitting module and can be connected to an external processor to receive processor instructions to perform tasks such as image capture, data acquisition, and data set analysis and transmission. Correspondingly, the photoelectric sensor is a CMOS photoelectric sensor 95 (e.g., an InGaAs detector). The path of light emitted by the light source element 1 of the transmitting module is, in order, the concave mirror 3, the test site 5, the bandpass filter 6, the wide-angle lens 91, the receiving convex lens 92, the spectroscopic filter 94, and the CMOS photoelectric sensor 95. During use, the transmitting module and the photoelectric sensor are activated by the camera board 96.

[0080] The present invention can be embedded in portable devices such as watches or bracelets for close-range measurement of blood sugar, anemia, uric acid, and other indicators. In the multi-band diffuse reflection near-infrared luminescence imaging device provided by the present invention, the light source element 1 emits light in the wavelength range of 750 to 2250 nm, and the bandpass filter 6 allows light in any wavelength range between 750 and 2250 nm to pass through. The photoelectric sensor 7 is an organic photoelectric sensor and can capture near-infrared images in any wavelength range between 750 and 2250 nm according to application requirements.

[0081] The measurement purpose in this embodiment is to obtain the user's blood sugar index. Therefore, the wavelength of the light emitted by the light source element 1 is between 750 and 1000 nm, and the bandpass filter 6 allows the passage of light between 750 and 1000 nm. The photoelectric sensor 7 is an organic photoelectric sensor and can capture near-infrared images between 750 and 1000 nm according to application requirements.

[0082] In some embodiments, when it is necessary to measure the user's anemia index, the wavelength of light emitted by the light source element 1 is between 760 and 1100 nm, and the bandpass filter 6 allows the passage of light between 760 and 1100 nm; the photoelectric sensor 7 is an organic photoelectric sensor and can capture near-infrared images between 760 and 1100 nm according to application requirements.

[0083] In some embodiments, when it is necessary to measure the user's uric acid level, the wavelength of light emitted by the light source element 1 is 1600nm, and the bandpass filter 6 allows light with a wavelength of 1600nm to pass through; the photoelectric sensor 7 is an organic photoelectric sensor and can capture near-infrared images with a wavelength of 1600nm according to application requirements.

[0084] When using the multi-band diffuse reflection near-infrared luminescence imaging device of this embodiment for data acquisition, the acquisition steps are shown in Figure 6. After the target area is placed, the transmitting module and the photoelectric sensor 7 are activated. After the transmitting module is activated, the light source element 1 is simultaneously turned on, and multiple light source elements 1 sequentially emit multiple groups of near-infrared light of different wavelengths. The photoelectric sensor 7 coordinates the timing of the light source elements 1 sequentially emitting multiple groups of near-infrared light of different wavelengths, and sequentially collects multiple frames of near-infrared images of the target area 5 at each wavelength after the near-infrared light of the wavelength is diffusely reflected by the target area 5. Specifically, in this embodiment, the first LED light is turned on to emit near-infrared light of the first wavelength. At the same time, the photoelectric sensor 7 begins to collect three frames of near-infrared images of the wrist after the near-infrared light of the first wavelength is diffusely reflected by the skin of the wrist, and selects the optimal frame. After the selection is completed, the first LED light is turned off, and the second LED light is turned on to emit near-infrared light of the second wavelength. At the same time, the photoelectric sensor 7 begins to collect three frames of near-infrared images of the wrist after the near-infrared light of the second wavelength is diffusely reflected by the skin of the wrist, and selects the optimal frame. After the screening is complete, the second LED is turned off and the third LED is turned on, emitting near-infrared light of the third wavelength. Simultaneously, the photoelectric sensor 7 begins collecting three frames of near-infrared images of the wrist after diffuse reflection of the third wavelength near-infrared light from the wrist skin, and selects the optimal frame. After the screening is complete, the third LED is turned off and the fourth LED is turned on, emitting near-infrared light of the fourth wavelength. Simultaneously, the photoelectric sensor 7 begins collecting three frames of near-infrared images of the wrist after diffuse reflection of the fourth wavelength near-infrared light from the wrist skin, and selects the optimal frame.

[0085] In some embodiments, a light source element 1 emits light of only one wavelength, and multiple light source elements 1 emit light of the same wavelength at the same time. For example, three LED lamps are turned on at the same time to emit near-infrared light of a first wavelength, another three LED lamps are turned on at the same time to emit near-infrared light of a second wavelength, another three LED lamps are turned on at the same time to emit near-infrared light of a third wavelength, and another three LED lamps are turned on at the same time to emit near-infrared light of a fourth wavelength.

[0086] Subsequently, the four frames of photos that were screened out were used as raw data for data pre-processing through an external processor, and the processed wrist near-infrared images were used as a data set for subsequent detection algorithms to ultimately obtain the required detection values.

[0087] In some embodiments, when measuring anemia in a user, only a uric acid index at a single wavelength is required. Therefore, data acquisition requires only activating light source element 1 emitting near-infrared light of the same wavelength. Simultaneously, photoelectric sensor 7 captures three frames of near-infrared wrist images of the same wavelength, after diffuse reflection from the wrist skin, and selects the optimal frame. Subsequently, an external processor processes the selected frame as raw data for data preprocessing. The processed wrist near-infrared image serves as a data set for subsequent detection algorithms, ultimately yielding the desired detection value.

[0088] In another embodiment of the present invention, its structure is similar to that of Figures 1 to 5, with only one light source element 1, which can emit light of several different wavelengths in sequence and only emit light of one wavelength at the same time. The transmitting module of this embodiment includes a light source element 1, a light source circuit board 2 and a concave mirror 3. In this embodiment, the light source element 1 is also an LED lamp. The light source element 1 is located on the light source circuit board and is equipped with a concave mirror 3 to converge the light emitted by the light source element 1. The light source element 1 is located at the center of the concave surface of the concave mirror 3; the concave mirror 3 allows the near-infrared light irradiation area of ​​the light source element 1 to evenly cover the part to be measured. Specifically, the concave mirror 3 can adjust the optical path of the near-infrared light emitted by the light source element 1 so that the adjusted near-infrared light is evenly concentrated in the designated area of ​​the part to be measured 5. The part to be measured in this embodiment is the skin on the user's wrist.

[0089] In some embodiments, there are multiple light source elements 1, each of which can emit light of several different wavelengths, and only emit light of one wavelength at the same time; at the same time, the wavelengths of light emitted by the multiple light source elements 1 are the same, for example, four LED lamps are turned on at the same time to emit near-infrared light of a first wavelength, and then the light emitted by these four LED lamps is simultaneously switched from near-infrared light of the first wavelength to near-infrared light of a second wavelength, and so on.

[0090] In some embodiments, there is only one light source element and the light source element is located at the center of the light source circuit board. Correspondingly, the position of the light hole is also changed, that is, a circle of light holes is provided around the periphery of the light source element.

[0091] Similar to those shown in Figures 4 and 5 , a light-through hole 4 (the dark gray part in the middle of Figures 4 and 5 ) is provided at the center of the light-through hole 4, and a centrally symmetrical circular ring belt 8 is provided around the light-through hole 4, on which a light source element 1 is mounted. Most of the electronic circuits are arranged outside the ring belt 8 of the light source circuit board 2.

[0092] Similar to Figures 1 and 2, the receiving module includes a bandpass filter 6 and a photoelectric sensor 7. The bandpass filter 6 is arranged between the light hole 4 and the photoelectric sensor 7, and is preferably arranged at the light hole 4 to save equipment space. The bandpass filter 6 neither allows light with a wavelength less than the minimum wavelength emitted by the light source element 1 to pass through, nor allows light with a wavelength greater than the maximum wavelength emitted by the light source element 1 to pass through. The photoelectric sensor 7 is a photoelectric sensor for distortion-free macro photography. In this embodiment, the photoelectric sensor is an organic photoelectric sensor (OPD). Organic photoelectric sensors have the characteristics of mechanical flexibility, easy processing, adjustable photoelectric characteristics, and excellent light sensing performance. Since organic photoelectric sensors have low requirements for imaging object distance, there is no need to use a lens for focusing when using them for macro imaging.

[0093] The path through which the light signal emitted by the light source element 1 of the transmitting module passes is, in sequence, the concave mirror 3, the part to be measured 5, the light hole 4, the bandpass filter 6 and the photoelectric sensor 7; the light signal passing through the bandpass filter 6 is the near-infrared light diffusely reflected by the part to be measured 5.

[0094] The present invention can be embedded in portable devices such as watches or bracelets for close-range measurement of blood sugar, anemia, uric acid, and other indicators. In the multi-band diffuse reflection near-infrared luminescence imaging device provided by the present invention, the light source element 1 emits light in the wavelength range of 750 to 2250 nm, and the bandpass filter 6 allows light in any wavelength range between 750 and 2250 nm to pass through. The photoelectric sensor 7 is an organic photoelectric sensor and can capture near-infrared images in any wavelength range between 750 and 2250 nm according to application requirements.

[0095] The measurement purpose in this embodiment is to obtain the user's blood sugar index. Therefore, the wavelength of the light emitted by the light source element 1 is between 750 and 1000 nm, and the bandpass filter 6 allows the passage of light between 750 and 1000 nm. The photoelectric sensor 7 is an organic photoelectric sensor and can capture near-infrared images between 750 and 1000 nm according to application requirements.

[0096] In some embodiments, when it is necessary to measure the user's anemia index, the wavelength of light emitted by the light source element 1 is between 760 and 1100 nm, and the bandpass filter 6 allows the passage of light between 760 and 1100 nm; the photoelectric sensor 7 is an organic photoelectric sensor and can capture near-infrared images between 760 and 1100 nm according to application requirements.

[0097] In some embodiments, when measuring a user's uric acid level, light source element 1 emits light at a wavelength of 1600 nm, and bandpass filter 6 allows light at 1600 nm to pass through. Photoelectric sensor 7 is an organic photoelectric sensor capable of capturing near-infrared images at 1600 nm, depending on the application. In this case, only one wavelength, the uric acid level at 1600 nm, needs to be measured.

[0098] When using the multi-band diffuse reflection near-infrared luminescence imaging device of this embodiment for data acquisition, the acquisition steps are shown in Figure 7. After the target area is placed, the transmitting module and the photoelectric sensor 7 are activated. After the transmitting module is activated, the light source element 1 is simultaneously turned on, and the light source element 1 sequentially emits near-infrared light of multiple different wavelengths. The photoelectric sensor 7 coordinates the timing of the light source element 1 sequentially emitting near-infrared light of multiple different wavelengths, and sequentially collects multiple frames of near-infrared images of the target area 6 at each wavelength after the near-infrared light of the wavelength is diffusely reflected by the target area 6. Specifically, in this embodiment, the LED light is turned on to emit near-infrared light of a first wavelength. At the same time, the photoelectric sensor 7 begins to collect three frames of near-infrared images of the wrist after the near-infrared light of the first wavelength is diffusely reflected by the skin of the wrist, and selects the optimal frame. After the selection is completed, the near-infrared light emitted by the LED light is switched from the first wavelength to the second wavelength. At the same time, the photoelectric sensor 7 begins to collect three frames of near-infrared images of the wrist after the near-infrared light of the second wavelength is diffusely reflected by the skin of the wrist, and selects the optimal frame. After the screening is complete, the near-infrared light emitted by the LED lamp is switched from the second wavelength to the third wavelength. Simultaneously, the photoelectric sensor 7 begins collecting three frames of near-infrared images of the wrist after diffuse reflection of the third wavelength near-infrared light from the wrist skin, and the optimal frame is selected. After the screening is complete, the near-infrared light emitted by the LED lamp is switched from the third wavelength to the fourth wavelength near-infrared light. Simultaneously, the photoelectric sensor 7 begins collecting three frames of near-infrared images of the wrist after diffuse reflection of the fourth wavelength near-infrared light from the wrist skin, and the optimal frame is selected.

[0099] Subsequently, the four frames of photos selected are used as raw data for data pre-processing through an external processor, and the processed wrist near-infrared images are used as a data set for subsequent detection algorithms to ultimately obtain the required detection values.

[0100] The preferred embodiments of the present invention have been described in detail above. It should be understood that numerous modifications and variations based on the concepts of the present invention are possible without inventive effort by those skilled in the art. Therefore, any technical solution that can be derived by one skilled in the art through logical analysis, reasoning, or limited experimentation based on the concepts of the present invention and the prior art should be within the scope of protection defined by the claims.

Claims

1. A multi-band diffuse reflection near-infrared luminescence shooting device, characterized in that: It includes a transmitting module and a receiving module; The transmitting module includes at least one light source element and at least one concave mirror for converging the light emitted by the light source element; the light source element corresponds to the concave mirror one by one; the at least one light source element is arranged on the light source circuit board and emits near-infrared light of respective wavelengths in sequence; the concave mirror makes the near-infrared light irradiation area of ​​the light source element evenly cover the part to be measured; The receiving module includes a bandpass filter and a photoelectric sensor; The path through which the light signal emitted by the light source element of the transmitting module passes is the concave mirror, the part to be measured, the bandpass filter and the photoelectric sensor in sequence; The optical signal passing through the bandpass filter is near-infrared light diffusely reflected by the part to be measured.

2. The multi-band diffuse reflection near-infrared luminescence camera according to claim 1, characterized in that: The light source element emits light of only one wavelength, and the wavelengths of light emitted by the plurality of light source elements may be the same or different; at the same time, only the light source elements emitting light of the same wavelength are turned on.

3. The multi-band diffuse reflection near-infrared luminescence camera according to claim 1, characterized in that: The light source element can emit light of several different wavelengths, and only emit light of one wavelength at the same time; at the same time, the wavelengths of light emitted by several light source elements are the same.

4. The multi-band diffuse reflection near-infrared luminescence camera according to claim 1, characterized in that: The photoelectric sensor is a distortion-free macro shooting photoelectric sensor.

5. The multi-band diffuse reflection near-infrared luminescence camera according to claim 1, characterized in that: The bandpass filter neither allows light with a wavelength smaller than the minimum wavelength emitted by the light source element to pass through, nor allows light with a wavelength larger than the maximum wavelength emitted by the light source element to pass through.

6. The multi-band diffuse reflection near-infrared luminescence camera according to claim 1, characterized in that: A light hole is provided in the middle of the light source circuit board. The light diffusely reflected by the part to be measured passes through the light hole, is filtered by the bandpass filter and reaches the photoelectric sensor; the light source element and the concave mirror are arranged around the periphery of the light hole.

7. The multi-band diffuse reflection near-infrared luminescence camera according to claim 6, characterized in that: A centrally symmetrical ring belt is arranged at the periphery of the light-through hole, on which the light source element and the concave mirror are mounted.

8. The multi-band diffuse reflection near-infrared luminescence camera according to claim 1, characterized in that: The light source element is an LED near-infrared lamp or an LD near-infrared lamp, and the wavelength band of the emitted light is between 750 and 2250 nm.

9. The multi-band diffuse reflection near-infrared luminescence camera according to claim 1, characterized in that: The bandpass filter can allow light in any wavelength range of 750-2250 nm to pass according to the needs of practical applications.

10. The multi-band diffuse reflection near-infrared luminescence camera according to claim 1, characterized in that: The photoelectric sensor is an organic graphic photoelectric sensor, and can capture near-infrared images in any wavelength range between 750nm and 2250nm according to application requirements.

11. A method for data collection using a multi-band diffuse reflection near-infrared luminescence camera as claimed in any one of claims 1 to 10, characterized in that: The collection steps are as follows: After the part to be tested is placed, the transmitting module and the photoelectric sensor are started; The light source elements emit near-infrared light of respective wavelengths in sequence, and at the same time, the wavelengths of the light emitted by the light source elements are the same; The photoelectric sensor cooperates with the light source element to sequentially emit near-infrared light of respective wavelengths, and sequentially collects multiple frames of near-infrared images of the part to be measured after the near-infrared light of the wavelength is diffusely reflected by the part to be measured at each wavelength; At least one frame is selected from the near-infrared image of the part to be tested and pre-processed by an external processor, and the processed near-infrared image of the part to be tested is used as a data set for subsequent applications.

12. The data collection method according to claim 11, characterized in that: After the photoelectric sensor has collected the near-infrared image of the test part at the previous wavelength and confirmed that the image can meet the collection purpose, it sends a feedback signal to switch the light source element that emits near-infrared light of the previous wavelength to the light source element that emits near-infrared light of the next wavelength until the near-infrared light images at all wavelengths are collected.

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