Multiband near-infrared light-emitting photographing apparatus and data collection method

Abstract

Disclosed are a multiband near-infrared light-emitting photographing apparatus and a data collection method therefor, the apparatus comprising a transmitting module and a receiving module. The transmitting module comprises at least one light source element and a transmitting end optical lens group, the light source elements being symmetrically arranged in a light source element mounting area on the light source circuit board, so that overlapping parts of the irradiation areas of all the light source elements cover a portion to be measured, and sequentially emitting near-infrared light having respective wavelengths thereof, and the transmitting end optical lens group comprising at least one convex lens. The receiving module comprises a band-pass optical filter, a receiving-end optical lens group and a photoelectric sensor; the light passing through the band-pass optical filter is diffuse transmission light penetrating through the part to be measured. The photographing apparatus provided by the present invention can cause a light source to uniformly converge in an effective illumination area, while eliminating interference from light in other wave bands in the ambient light, reducing noise and further improving detection accuracy.

Description

A multi-band 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 near-infrared luminescence imaging 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 object of the present invention is to provide a multi-band 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 near-infrared luminescence shooting device, comprising a transmitting module and a receiving module;

[0008] The transmitting module includes at least one light source element and a transmitting end optical lens group; the transmitting end optical lens group includes at least one transmitting end convex lens;

[0009] The receiving module includes a bandpass filter, a receiving end optical lens group and a photoelectric sensor;

[0010] The path through which the light emitted by the light source element of the transmitting module passes is, in sequence, the transmitting end optical lens group, the part to be measured, the bandpass filter, the receiving end optical lens group and the photoelectric sensor.

[0011] The light passing through the bandpass filter is diffusely transmitted light penetrating the part to be measured.

[0012] In some embodiments, the light source elements are symmetrically arranged in the light source element mounting area on the light source circuit board, so that the overlapping parts of the illumination areas of all the light source elements cover the part to be measured, and respectively emit near-infrared light of their respective wavelengths in turn; the light source element mounting area is located on the light source circuit board and can be rectangular, circular, etc.; the light source circuit board is circular or rectangular, etc.

[0013] Symmetrical arrangements include central symmetry, axial symmetry, etc. For example, when the number of the light source elements is one, they can be arranged at the center of the light source circuit board; when the number of the light source elements is three, they can be arranged in an equilateral triangle on the light source circuit board, that is, each light source element is located at the vertex of the equilateral triangle, and the center of the equilateral triangle is the center of the light source circuit board.

[0014] In some embodiments, the transmitting module also includes 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, 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 concave center of the corresponding concave mirror; 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 converged on the designated area of ​​the part to be measured.

[0015] The path through which the light emitted by the light source element of the transmitting module passes is, in sequence, the concave mirror, the transmitting end optical lens group, the part to be measured, the bandpass filter, the receiving end optical lens group and the photoelectric sensor.

[0016] In some embodiments, the emitting end convex lens is two plano-convex lenses.

[0017] 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.

[0018] In some embodiments, the emission module further includes a light source temperature control system, and the light source temperature control system is installed on any side of the light source circuit board, preferably on the back side.

[0019] In some embodiments, the multi-band near-infrared luminescence shooting device also includes a detection object fixing device for placing the part to be measured; an elastic material, preferably silicone, is provided in the detection object fixing device to limit and fix the position of the part to be measured; detection object fixing device light holes are respectively provided on both sides of the detection object fixing device, so that the light transmitted from the optical lens group at the transmitting end passes through the detection object fixing device light hole on one side to reach the part to be measured, and after diffuse transmission through the part to be measured, passes through the detection object fixing device light hole on the other side and reaches the receiving module.

[0020] In some embodiments, the detection object fixing device further comprises a mechanical switch, and contact of the detected part triggers the mechanical switch, thereby activating the emission module and the photoelectric sensor.

[0021] 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, and the receiving end convex lens can be a plano-convex lens group; an imaging channel is formed between the wide-angle lens and the camera board, and the receiving end convex lens and the spectroscopic filter are arranged in the imaging channel; the camera board is a circuit board on which the photoelectric sensor is mounted, and 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;

[0022] The imaging channel is mainly used to constrain the imaging range and prevent other stray light inside the shooting device from entering the receiving end optical lens group and the photoelectric sensor; the receiving end optical lens group allows the diffuse transmitted light passing through the part to be measured to be accurately collected and converged to the photoelectric sensor; the spectroscopic filter only allows the light of a specific wavelength band emitted by the light source element to pass through and reach the photoelectric sensor; the photoelectric sensor is a high-precision and high-quality photoelectric sensor, and the light received is diffusely transmitted near-infrared light that penetrates the part to be measured.

[0023] The path through which the light emitted by the light source element of the transmitting module passes is, in sequence, the transmitting end optical lens group, the part to be measured, the bandpass filter, the wide-angle lens, the receiving end convex lens, the spectroscopic filter, and the photoelectric sensor.

[0024] In some embodiments, the multi-band near-infrared light-emitting camera device further includes a connecting and fixing component device for connecting and fixing each component separately, and a plurality of clips are provided on the connecting and fixing component device for installing and fixing components. The connecting and fixing component device simplifies the installation of each component, especially the installation and fixation of the imaging channel becomes a simple accumulation similar to building blocks, so that once the multi-band near-infrared light-emitting camera device is installed, there is no need to make other adjustments to its optical path convergence and shooting focus.

[0025] In some embodiments, the light source element is an LED lamp; the light source temperature control system is a semiconductor refrigerator (TEC); the spectroscopic filter is a linear variable filter (LVF); the photoelectric sensor is an indium gallium arsenide (InGaAs) detector; and the camera board is a PCB electronic circuit board.

[0026] In some embodiments, the light source element can emit light of several wavelengths between 750 and 2250 nm according to the detection purpose; the bandpass filter can allow light in a certain band range in the 750 to 2250 nm band to pass according to the wavelength of the light emitted by the light source element; the spectroscopic filter can allow light of several wavelengths in the 750 to 2250 nm band to pass according to the wavelength of the light emitted by the light source element; the photosensor is black and white and can capture near-infrared images at several wavelengths in the 700 to 2500 nm band according to the wavelength of the light emitted by the light source element.

[0027] In some embodiments, the photographing device is used to measure the user's blood sugar index and hemoglobin concentration of anemia, etc.; the wavelength of light emitted by the light source element is between 750 and 1000 nm; the bandpass filter allows light in the 750-1000 nm band to pass through; the spectroscopic filter allows light of several wavelengths in the 750-1000 nm band to pass through; the photosensor is black and white and can capture near-infrared images of several wavelengths in the 750-1000 nm band.

[0028] In some embodiments, the photographing device is used to measure the user's uric acid index; the wavelength of light emitted by the light source element is between 1550 and 1650 nm; the bandpass filter allows light in the 1550-1650 nm band to pass through; the spectroscopic filter allows light of several wavelengths in the 1550-1650 nm band to pass through; the photosensor is black and white and can capture near-infrared images of several wavelengths in the 1550-1650 nm band.

[0029] The data acquisition method using the multi-band near-infrared luminescence imaging device described above has the following acquisition steps:

[0030] Placing the part to be tested on the test object fixing device, the part to be tested triggers the mechanical switch through direct contact, and the mechanical switch activates the transmitting module and the photoelectric sensor through the camera board;

[0031] The plurality of 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;

[0032] 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 passes through 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.

[0033] At least one frame is selected from the near-infrared image of the part to be measured to perform preliminary data processing, and the processed near-infrared image of the part to be measured is used as a data set for subsequent applications.

[0034] The near-infrared image of the part to be measured includes but is not limited to photos, continuous video clips and spectrograms.

[0035] Preferably, after the photoelectric sensor has collected the near-infrared image of the part to be measured 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.

[0036] The present invention also provides another multi-band near-infrared luminescence imaging device, the technical solution of which is as follows:

[0037] A multi-band near-infrared luminescence shooting device, comprising a reflective transmitting module and a receiving module;

[0038] The reflective emission module includes at least one light source element and an emission end optical lens group; the emission end optical lens group includes at least one emission end concave mirror;

[0039] The receiving module includes a bandpass filter, a receiving end optical lens group and a photoelectric sensor.

[0040] The path through which the light emitted by the light source element of the reflective transmitting module passes is, in sequence, the transmitting end concave mirror, the part to be measured, the bandpass filter, the receiving end optical lens group and the photoelectric sensor;

[0041] The light passing through the bandpass filter is diffusely transmitted light penetrating the part to be measured.

[0042] In some embodiments, the light source elements are symmetrically arranged in the light source element mounting area on the light source circuit board, so that the overlapping parts of the illumination areas of all the light source elements cover the part to be measured, and respectively emit near-infrared light of their respective wavelengths in turn; the light source element mounting area can be rectangular, circular, etc.; the light source circuit board can be rectangular, circular, etc.

[0043] Symmetrical arrangement includes central symmetry, axial symmetry, etc. For example, when the number of the light source elements is three, they can be arranged in an equilateral triangle on the light source circuit board, that is, each light source element is located at the vertex of the equilateral triangle, and the center of the equilateral triangle is the center of the light source circuit board.

[0044] In some embodiments, the transmitting end optical lens group also includes at least one transmitting end convex lens, preferably two plano-convex lenses; the path through which the light emitted by the light source element of the reflective transmitting module passes is, in sequence, the transmitting end concave mirror, the transmitting end convex lens, the part to be measured, the bandpass filter, the receiving end optical lens group and the photoelectric sensor.

[0045] In some embodiments, a light source circuit board light hole is provided in the middle of the light source circuit board, and the light focused by the concave mirror at the transmitting end passes through the light source circuit board light hole to reach the receiving module; the light source elements are arranged around the light source circuit board light hole.

[0046] In some embodiments, the bandpass filter neither allows light with a wavelength less than the minimum wavelength emitted by the light source element to pass through, nor allows light with a wavelength greater than the maximum wavelength emitted by the light source element to pass through. The bandpass filter is disposed between the light aperture and the photosensor, preferably at the light aperture to save equipment space.

[0047] In some embodiments, the reflective emission module also includes a light source temperature control system, which maintains the temperature of all the light source elements within a reasonable range through heating or cooling to reduce measurement errors caused by temperature differences of the light source elements. The light source temperature control system is installed on any side of the light source circuit board, preferably on the back of the light source circuit board.

[0048] In some embodiments, the multi-band near-infrared luminescence shooting device also includes a detection object fixing device for placing the part to be measured; an elastic material, preferably silicone, is provided in the detection object fixing device to limit and fix the position of the part to be measured; detection object fixing device light holes are respectively provided on both sides of the detection object fixing device, so that the light transmitted from the optical lens group at the transmitting end passes through the detection object fixing device light hole on one side to reach the part to be measured, and after diffuse transmission through the part to be measured, passes through the detection object fixing device light hole on the other side and reaches the receiving module.

[0049] In some embodiments, the detection object fixing device further comprises a mechanical switch, and contact of the detected part triggers the mechanical switch, thereby activating the emission module and the photoelectric sensor.

[0050] 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, and the receiving end convex lens can be a plano-convex lens group; an imaging channel is formed between the wide-angle lens and the camera board, and the receiving end convex lens and the spectroscopic filter are arranged in the imaging channel; the camera board is a circuit board on which the photoelectric sensor is mounted, and 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;

[0051] The path through which the light emitted by the light source element of the reflective emission module passes is, in sequence, the concave mirror at the emission end, the part to be measured, the bandpass filter, the wide-angle lens, the convex lens at the receiving end, the spectroscopic filter, and the photoelectric sensor.

[0052] In some embodiments, the multi-band near-infrared light-emitting camera further includes a component connection and fixing device for connecting and fixing each component separately, and a plurality of buckles are provided on the component connection and fixing device for fixing the components.

[0053] In some embodiments, the light source element is an LED lamp; the light source temperature control system is a semiconductor refrigerator; the spectroscopic filter is a linear gradient filter; the photoelectric sensor is an indium gallium arsenide detector; and the camera board is a PCB electronic circuit board.

[0054] In some embodiments, the light source element can emit light of several wavelengths between 750 and 2250 nm according to the detection purpose; the bandpass filter can allow light in a certain band range in the 750 to 2250 nm band to pass according to the wavelength of the light emitted by the light source element; the spectroscopic filter can allow light of several wavelengths in the 750 to 2250 nm band to pass according to the wavelength of the light emitted by the light source element; the photoelectric sensor is black and white and can capture near-infrared images at several wavelengths in the 700 to 2500 nm band according to the wavelength of the light emitted by the light source element.

[0055] In some embodiments, the photographing device is used to measure the user's blood sugar index and hemoglobin concentration of anemia, etc.; the wavelength of light emitted by the light source element is between 750 and 1000 nm; the bandpass filter allows light in the 750-1000 nm band to pass through; the spectroscopic filter allows light of several wavelengths in the 750-1000 nm band to pass through; the photosensor is black and white and can capture near-infrared images of several wavelengths in the 750-1000 nm band.

[0056] In some embodiments, the photographing device is used to measure the user's uric acid index; the wavelength of light emitted by the light source element is between 1550 and 1650 nm; the bandpass filter allows light in the 1550-1650 nm band to pass through; the spectroscopic filter allows light of several wavelengths in the 1550-1650 nm band to pass through; the photosensor is black and white and can capture near-infrared images of several wavelengths in the 1550-1650 nm band.

[0057] The data acquisition method using the multi-band near-infrared luminescence imaging device described above has the following acquisition steps:

[0058] Placing the part to be tested on the test object fixing device, the part to be tested triggers the mechanical switch through direct contact, and the mechanical switch activates the transmitting module and the photoelectric sensor through the camera board;

[0059] The plurality of 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;

[0060] 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 passes through 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.

[0061] At least one frame of the near-infrared image of the part to be measured is selected for preliminary data processing, and the processed near-infrared image of the part to be measured is used as a data set for a subsequent detection algorithm.

[0062] The near-infrared image of the part to be measured includes but is not limited to photos, continuous video clips and spectrograms.

[0063] Preferably, after the photoelectric sensor has collected the near-infrared image of the part to be measured 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.

[0064] The present invention also provides another multi-band near-infrared luminescence imaging device, the technical solution of which is as follows:

[0065] A multi-band near-infrared luminescence shooting device, comprising a reflective transmitting module and a lens-less receiving module;

[0066] The reflective emission module includes at least one light source element and an emission end optical lens group; the emission end optical lens group includes at least one emission end concave mirror;

[0067] The lens-free receiving module includes a bandpass filter and a photoelectric sensor, and the photoelectric sensor is a photoelectric sensor for distortion-free macro photography; a distortion-free macro photography photoelectric sensor refers to a photoelectric sensor that can perform distortion-free imaging in macro scenes, and an organic photoelectric sensor (OPD) is one of the most widely used ones at present.

[0068] The path through which the light emitted by the light source element of the reflective emission module passes is, in sequence, the emission end concave mirror, the part to be measured, the bandpass filter, and the photoelectric sensor;

[0069] The light passing through the bandpass filter is diffusely transmitted light penetrating the part to be measured.

[0070] In some embodiments, the light source elements are symmetrically arranged in the light source element mounting area on the light source circuit board, so that the overlapping parts of the illumination areas of all the light source elements cover the part to be measured, and respectively emit near-infrared light of their respective wavelengths in turn; the light source element mounting area can be rectangular, circular, etc.; the light source circuit board can be rectangular, circular, etc.

[0071] Symmetrical arrangement includes central symmetry, axial symmetry, etc. For example, when the number of the light source elements is three, they can be arranged in an equilateral triangle on the light source circuit board, that is, each light source element is located at the vertex of the equilateral triangle, and the center of the equilateral triangle is the center of the light source circuit board.

[0072] In some embodiments, the transmitting end optical lens group also includes at least one transmitting end convex lens, preferably two plano-convex lenses; the path through which the light emitted by the light source element of the reflective transmitting module passes is, in sequence, the transmitting end concave mirror, the transmitting end convex lens, the part to be measured, the bandpass filter and the photoelectric sensor.

[0073] In some embodiments, a light source circuit board light hole is provided in the middle of the light source circuit board, and the light focused by the concave mirror at the transmitting end passes through the light source circuit board light hole to reach the lens-free receiving module; the light source elements are arranged around the light source circuit board light hole.

[0074] In some embodiments, the bandpass filter neither allows light with a wavelength less than the minimum wavelength emitted by the light source element to pass through, nor allows light with a wavelength greater than the maximum wavelength emitted by the light source element to pass through. The bandpass filter is disposed between the light aperture and the photosensor, preferably at the light aperture to save equipment space.

[0075] In some embodiments, the reflective emission module also includes a light source temperature control system, which maintains the temperature of all the light source elements within a reasonable range through heating or cooling to reduce measurement errors caused by temperature differences of the light source elements. The light source temperature control system is installed on any side of the light source circuit board, preferably on the back of the light source circuit board.

[0076] In some embodiments, the multi-band near-infrared luminescence shooting device also includes a detection object fixing device for placing the part to be measured; an elastic material, preferably silicone, is provided in the detection object fixing device to limit and fix the position of the part to be measured; detection object fixing device light holes are respectively provided on both sides of the detection object fixing device, so that the light transmitted from the optical lens group at the transmitting end passes through the detection object fixing device light hole on one side to reach the part to be measured, and after diffuse transmission through the part to be measured, passes through the detection object fixing device light hole on the other side and reaches the receiving module.

[0077] In some embodiments, the detection object fixing device further comprises a mechanical switch, and contact of the detected part triggers the mechanical switch, thereby activating the emission module and the photoelectric sensor.

[0078] In some embodiments, the multi-band near-infrared light-emitting camera device further includes a connecting and fixing component device for connecting and fixing each component separately, and a plurality of clips are provided on the connecting and fixing component device for installing and fixing the components. The connecting and fixing component device simplifies the installation of each component, and the installation and fixation of each component becomes a simple accumulation similar to building blocks. This means that once the multi-band near-infrared light-emitting camera device is installed, there is no need to make other adjustments to its optical path convergence and shooting focus.

[0079] In some embodiments, the light source element is an LED lamp; the light source temperature control system is a semiconductor cooler; and the photoelectric sensor for distortion-free macro photography is an organic pattern photoelectric sensor. These organic photoelectric sensors offer mechanical flexibility, ease of processing, adjustable photoelectric properties, and excellent light sensing performance. Because organic photoelectric sensors have low imaging object distance requirements, lens focusing is not required when using them for macro imaging.

[0080] In some embodiments, the light source element can emit light of several wavelengths between 750 and 2250 nm according to the detection purpose; the bandpass filter can allow light in a certain band range between 750 and 2250 nm to pass according to the wavelength of the light emitted by the light source element; the photoelectric sensor can capture near-infrared images at several wavelengths in the 700 to 2500 nm band according to the wavelength of the light emitted by the light source element.

[0081] In some embodiments, the photographing device is used to measure the user's blood sugar index and hemoglobin concentration of anemia, etc.; the wavelength of light emitted by the light source element is between 750 and 1000 nm; the bandpass filter allows light in the wavelength range of 750 to 1000 nm to pass through; and the photoelectric sensor can capture near-infrared images of several wavelengths in the 750 to 1000 nm band.

[0082] In some embodiments, the photographing device is used to measure the user's uric acid index; the light emitted by the light source element has a wavelength range of 1550 to 1650 nm; the bandpass filter allows light in the 1550 to 1650 nm band to pass through; and the photoelectric sensor can capture near-infrared images of several wavelengths in the 1550 to 1650 nm band.

[0083] The data acquisition method using the multi-band near-infrared luminescence imaging device described above has the following acquisition steps:

[0084] Placing the part to be tested on the test object fixing device, the part to be tested triggers the mechanical switch through direct contact, and the mechanical switch activates the transmitting module and the photoelectric sensor through the camera board;

[0085] The plurality of 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;

[0086] 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 passes through 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.

[0087] At least one frame of the near-infrared image of the part to be measured is selected for preliminary data processing, and the processed near-infrared image of the part to be measured is used as a data set for a subsequent detection algorithm.

[0088] The near-infrared image of the part to be measured includes but is not limited to photos, continuous video clips and spectrograms.

[0089] Preferably, after the photoelectric sensor has collected the near-infrared image of the part to be measured 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.

[0090] The present invention also provides another multi-band near-infrared luminescence imaging device, the technical solution of which is as follows:

[0091] A multi-band near-infrared luminescence shooting device, comprising a transmitting module and a lens-free receiving module;

[0092] The transmitting module includes at least one light source element and a transmitting end optical lens group; the transmitting end optical lens group includes at least one transmitting end convex lens;

[0093] The lens-free receiving module includes a bandpass filter and a photoelectric sensor, and the photoelectric sensor is a photoelectric sensor for distortion-free macro photography; a distortion-free macro photography photoelectric sensor refers to a photoelectric sensor that can perform distortion-free imaging in macro scenes, and an organic photoelectric sensor (OPD) is one of the most widely used ones at present.

[0094] The path through which the light emitted by the light source element of the transmitting module passes is, in sequence, the transmitting end optical lens group, the part to be measured, the bandpass filter and the photoelectric sensor.

[0095] The light passing through the bandpass filter is diffusely transmitted light penetrating the part to be measured.

[0096] In some embodiments, the light source elements are symmetrically arranged in the light source element mounting area on the light source circuit board, so that the overlapping parts of the illumination areas of all the light source elements cover the part to be measured, and respectively emit near-infrared light of their respective wavelengths in turn; the light source element mounting area is located on the light source circuit board and can be rectangular, circular, etc.; the light source circuit board is circular or rectangular, etc.

[0097] In some embodiments, the transmitting module also includes 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, 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 concave center of the corresponding concave mirror; 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 converged on the designated area of ​​the part to be measured.

[0098] The path through which the light emitted by the light source element of the transmitting module passes is, in sequence, the concave mirror, the transmitting end optical lens group, the part to be measured, the bandpass filter and the photoelectric sensor.

[0099] 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.

[0100] In some embodiments, the emitting end convex lens is two plano-convex lenses.

[0101] In some embodiments, the emission module further includes a light source temperature control system, and the light source temperature control system is installed on any side of the light source circuit board, preferably on the back side.

[0102] In some embodiments, the multi-band near-infrared luminescence shooting device also includes a detection object fixing device for placing the part to be measured; an elastic material, preferably silicone, is provided in the detection object fixing device to limit and fix the position of the part to be measured; detection object fixing device light holes are respectively provided on both sides of the detection object fixing device, so that the light transmitted from the optical lens group at the transmitting end passes through the detection object fixing device light hole on one side to reach the part to be measured, and after diffuse transmission through the part to be measured, passes through the detection object fixing device light hole on the other side and reaches the receiving module.

[0103] In some embodiments, the detection object fixing device further comprises a mechanical switch, and contact of the detected part triggers the mechanical switch, thereby activating the emission module and the photoelectric sensor.

[0104] In some embodiments, the multi-band near-infrared luminescence camera further includes a connecting and fixing component device for connecting and fixing each component separately, and a plurality of buckles are provided on the device for installing and fixing the components.

[0105] In some embodiments, the light source element is an LED lamp; the light source temperature control system is a semiconductor cooler (TEC); and the photoelectric sensor for distortion-free macro photography is an organic pattern photoelectric sensor. These organic photoelectric sensors are characterized by mechanical flexibility, ease of processing, adjustable photoelectric properties, and excellent light sensing performance. Because organic photoelectric sensors have low imaging object distance requirements, lens focusing is not required when using them for macro imaging.

[0106] In some embodiments, the light source element can emit light of several wavelengths between 750 and 2250 nm according to the detection purpose; the bandpass filter can allow light in a certain band range between 750 and 2250 nm to pass according to the wavelength of the light emitted by the light source element; the photoelectric sensor can capture near-infrared images at several wavelengths in the 700 to 2500 nm band according to the wavelength of the light emitted by the light source element.

[0107] In some embodiments, the photographing device is used to measure the user's blood sugar index and hemoglobin concentration of anemia, etc.; the wavelength of light emitted by the light source element is between 750 and 1000 nm; the bandpass filter allows light in the wavelength range of 750 to 1000 nm to pass through; and the photoelectric sensor can capture near-infrared images of several wavelengths in the 750 to 1000 nm band.

[0108] In some embodiments, the photographing device is used to measure the user's uric acid index; the light emitted by the light source element has a wavelength range of 1550 to 1650 nm; the bandpass filter allows light in the 1550 to 1650 nm band to pass through; and the photoelectric sensor can capture near-infrared images of several wavelengths in the 1550 to 1650 nm band.

[0109] The data acquisition method using the multi-band near-infrared luminescence imaging device described above has the following acquisition steps:

[0110] Placing the part to be tested on the test object fixing device, so that the part to be tested triggers the mechanical switch by direct contact, and the mechanical switch then activates the transmitting module and the photoelectric sensor;

[0111] The plurality of 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;

[0112] 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 passes through 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.

[0113] At least one frame is selected from the near-infrared image of the part to be measured to perform preliminary data processing, and the processed near-infrared image of the part to be measured is used as a data set for subsequent applications.

[0114] The near-infrared image of the part to be measured includes but is not limited to photos, continuous video clips and spectrograms.

[0115] Preferably, after the photoelectric sensor has collected the near-infrared image of the part to be measured 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.

[0116] Beneficial effects of the present invention:

[0117] The multiple light source elements on the multi-band near-infrared luminescence shooting device provided by the present invention can respectively emit 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 arranges the light source elements evenly 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 errors caused by the different positions of the light source elements when collecting data in multiple bands, and providing a transmitting end convex lens in the transmitting end lens group, so that the light source can achieve uniformity while meeting the convergence, that is, it can finally 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 light in other bands in the ambient light, reducing noise, and further improving the detection accuracy.

[0118] 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

[0119] FIG1 is a schematic diagram of the structure of a multi-band near-infrared luminescence shooting device.

[0120] FIG2 is a schematic diagram of the structure of the light source circuit board.

[0121] FIG3 is a light path diagram of a multi-band near-infrared luminescence imaging device.

[0122] FIG4 is another structural diagram of a multi-band near-infrared luminescence imaging device

[0123] FIG5 is another optical path diagram of the multi-band near-infrared luminescence imaging device.

[0124] FIG6 is a flow chart of data acquisition using a multi-band near-infrared luminescence imaging device.

[0125] FIG. 7 is another flow chart of data acquisition using a multi-band near-infrared luminescence imaging device.

[0126] FIG8 is a schematic structural diagram of a multi-band near-infrared luminescence camera device having a reflective emission module.

[0127] FIG9 is a schematic diagram of the structure of a light source circuit board of a multi-band near-infrared light-emitting camera device having a reflective emission module.

[0128] FIG10 is a light path diagram of a multi-band near-infrared luminescence camera device having a reflective emission module.

[0129] FIG11 is a schematic structural diagram of a multi-band near-infrared luminescence shooting device having a reflective transmitting module and a lens-less receiving module.

[0130] FIG12 is a light path diagram of a multi-band near-infrared light-emitting camera having a reflective transmitting module and a lens-less receiving module.

[0131] FIG13 is a schematic structural diagram of a multi-band near-infrared luminescence shooting device having a lens-free receiving module.

[0132] FIG14 is a light path diagram of a multi-band near-infrared luminescence shooting device having a lens-free receiving module.

[0133] Description of the drawings: 1a, transmitting module, 111, light source circuit board, 112, light source element, 113, light through hole of the light source circuit board, 114, concave mirror, 115, light source installation area, 12, convex lens at the transmitting end, 13, concave mirror at the transmitting end, 2a, receiving module, 21, bandpass filter, 22, shooting component, 221, wide-angle lens, 222, convex lens at the receiving end, 223, spectroscopic filter, 224, photoelectric sensor, 225, camera board, 226, imaging channel, 227, lens holder, 1b, reflective transmitting module, 2b, lens-less receiving module. DETAILED DESCRIPTION

[0134] 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.

[0135] 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.

[0136] One embodiment of the present invention, as shown in Figures 1 and 3, is a multi-band near-infrared luminescence shooting device, which includes a transmitting module 1a, a detection object fixing device and a receiving module 2. The part to be tested is the epidermis of the fingertip, and the purpose of detection is to non-invasively detect the blood sugar level or uric acid level of the human body.

[0137] The transmitting module 1a includes a light source element 112 and a transmitting end optical lens group. The transmitting end optical lens group contains two transmitting end convex lenses 12, preferably two plano-convex lenses, and the convex surfaces of the two plano-convex lenses are facing inward. The light source element 112 is an LED lamp (Figure 2), each light source element 112 only emits one wavelength of light, and the four light source elements 112 are symmetrically arranged in the light source element installation area. Each light source element 112 only emits one wavelength of light, and the wavelengths of light emitted by the four light source elements 112 are different. It should be noted that two light source elements 112 are omitted in Figures 1 and 3 for ease of reading. The symmetrical arrangement of the LED lamps combined with the transmitting end optical lens group ensures that the near-infrared light emitted by the LED lamps at different positions covers the detection position after being converged by the transmitting end optical lens group, and the brightness is evenly illuminated in the detection area. A light source temperature control system is provided on the back of the light source circuit board 111, which is a semiconductor refrigerator (TEC). The wavelength of the near-infrared light emitted by LED lamps will affect the results of subsequent data collection and analysis. The presence of TEC can ensure the temperature stability of the LED lamp during operation, thereby ensuring that the wavelength of the near-infrared light emitted by the LED lamp during operation will not be affected by the operating and ambient temperatures, increasing the accuracy of the results and reducing the error in the test results caused by different operating and ambient temperatures.

[0138] In some embodiments, one light source element 112 emits light of only one wavelength, and multiple light source elements 112 emit light of the same wavelength at the same time. For example, three LED lights are turned on at the same time to emit near-infrared light of a first wavelength, another three LED lights are turned on at the same time to emit near-infrared light of a second wavelength, another three LED lights are turned on at the same time to emit near-infrared light of a third wavelength, and another three LED lights are turned on at the same time to emit near-infrared light of a fourth wavelength.

[0139] In some embodiments, as shown in Figures 4 and 5 , each light source element 112 is equipped with a concave mirror 114 to focus the light emitted by each light source element 112. Light source element 112 is mounted on the concave surface of concave mirror 114. The presence of concave mirror 114 facilitates adjusting the optical path of the near-infrared light emitted by light source element 112, so that the adjusted near-infrared light is uniformly focused on a designated area of ​​the test site. Note that Figures 4 and 5 omit two light source elements 112 and their concave mirrors 114 for ease of reading.

[0140] In some embodiments, as shown in Figures 8-10, the transmitting module is a reflective transmitting module 1b, which includes a light source element 112 and a transmitting optical lens assembly. The transmitting optical lens assembly includes a transmitting concave mirror 31 and two transmitting convex lenses 12, preferably two plano-convex lenses. A circular light source circuit board light hole 113 (Figure 9) is provided in the center of the square light source circuit board 111, allowing light concentrated by the transmitting concave mirror 31 to smoothly pass through the light source circuit board 111 to reach the plano-convex lenses of the transmitting optical lens assembly. Four light source elements 112 are symmetrically arranged around the periphery of the light source circuit board light hole 113 in the light source element mounting area. It should be noted that two light source elements 112 are omitted in Figures 8 and 9 for ease of reading. A light source temperature control system is provided on the back of the light source circuit board 111. The optical path of the camera device is that the light emitted by the light source element 112 of the reflective transmitting module passes through a transmitting concave mirror 31, two plano-convex lenses, and the target area. The light diffusely transmitted through the target area then enters the receiving module 2.

[0141] The object holder (not shown) is equipped with an elastic material, such as silicone, located on the upper and lower sides of the finger to limit and fix the finger's position. This eliminates the positional changes of the test site caused by the fatness and placement of different fingers. This reduces the need to adjust the optical path, increasing user convenience while ensuring measurement accuracy. Two light holes are provided on both sides of the object holder, allowing light to enter the object holder smoothly, reach the test site, and diffusely transmit to the receiving module 2. A mechanical switch is also provided in the object holder. After the fingertip is placed, direct contact triggers the mechanical switch, thereby activating the transmitting module and photoelectric sensor 224.

[0142] The receiving module 2 includes a bandpass filter 21 and a camera component 22. The camera component 22 comprises a lens holder 227 supporting the lens, a camera board 225, and a sequentially arranged receiving optical lens assembly, a spectroscopic filter 223, and a photoelectric sensor 224. The receiving optical lens assembly comprises a wide-angle lens 221 and a receiving convex lens 222. The wide-angle lens 221 and the camera board 225 form an imaging channel 226, within which the receiving convex lens 222 and the spectroscopic filter 223 are located. The camera board 225 is a PBC electronic circuit board associated with the transmitting module. The photoelectric sensor 224 is mounted on the camera board 225 and can be connected to an external processor to receive instructions from the processor to perform tasks such as capturing, data acquisition, and data set analysis and transmission. In this embodiment, the bandpass filter 21 and spectroscopic filter 223 effectively filter out interference light not required for capturing and data acquisition, thereby significantly improving the accuracy of capturing images and enhancing the effectiveness of scientific analysis and data processing.

[0143] In some embodiments, an organic photoelectric sensor (OPD) is preferably used. As shown in Figures 11 and 12, the receiving module does not have a lens frame, a camera board, a receiving end optical lens group, and a spectroscopic filter. It only has a bandpass filter 21 and a photoelectric sensor 224, which is called a lens-free receiving module 2b. The photoelectric sensor 224 in the lens-free receiving module 2b is a photoelectric sensor for distortion-free macro photography. A distortion-free macro photography photoelectric sensor refers to a photoelectric sensor that can perform distortion-free imaging in macro scenes. It has the characteristics of mechanical flexibility, ease of processing, adjustable photoelectric characteristics, and excellent light sensing performance. It has low requirements for imaging object distance, so when using it for macro imaging, it does not require lens focusing. An organic photoelectric sensor (OPD) is preferably used. The optical path of the shooting device is that the light emitted by the light source element 112 passes through the transmitting end optical lens group and the part to be measured in sequence. The light after diffuse transmission through the part to be measured then passes through the bandpass filter 21 and finally reaches the photoelectric sensor 224.

[0144] In some embodiments, the shooting device also includes a connecting and fixing component device for connecting and fixing each component separately, and a plurality of clips are provided on the device for fixing the components that need to be connected, especially making the installation and fixation of the shooting component 22 a simple plug-in similar to building blocks, so that once the multi-band near-infrared light-emitting shooting device is installed, there is no need to make other adjustments to its optical path convergence and shooting focus.

[0145] In the multi-band near-infrared luminescence shooting device provided in this embodiment, the light source element 112 can emit light of any number of wavelengths between the 750 and 2250 nm bands, and the wavelength of the emitted light is determined according to the detection purpose; the bandpass filter 21 allows light of any wavelength range in the 750 to 2250 nm band to pass through, and the wavelength range allowed to pass through is determined according to the wavelength of the light emitted by the light source element 112; the spectroscopic filter 223 allows light of any number of wavelengths in the 750 to 2250 nm band to pass through, and the number of wavelengths allowed to pass through is determined according to the wavelength of the light emitted by the light source element 112; the photoelectric sensor 224 is black and white and can capture near-infrared images at any number of wavelengths in the 700 to 2500 nm band, and the number of near-infrared images at the wavelengths allowed to be captured is determined according to the wavelength of the light emitted by the light source element 112.

[0146] In some embodiments, the photographing device is used to measure the user's blood sugar index and hemoglobin concentration of anemia; the wavelength of light emitted by the light source element 112 is between 750 and 1000 nm; the bandpass filter 21 allows light in any wavelength range of 750 to 1000 nm to pass through; the spectroscopic filter 223 allows light of any number of wavelengths in the 750 to 1000 nm band to pass through; the photosensor 224 is black and white and can capture near-infrared images of any number of wavelengths in the 750 to 1000 nm band.

[0147] In some embodiments, the photographing device is used to measure the user's uric acid index; the wavelength of light emitted by the light source element 112 is between 1550 and 1650 nm; the bandpass filter 21 allows light in any wavelength range of 1550 to 1650 nm to pass through; the spectroscopic filter 223 allows light of any number of wavelengths in the 1550 to 1650 nm band to pass through; the photosensor 224 is black and white and can capture near-infrared images of any number of wavelengths in the 1550 to 1650 nm band.

[0148] As shown in Figure 3, the optical path of the multi-band near-infrared luminescence imaging device described in this embodiment is as follows: light emitted by the light source element 112 of the transmitting module passes through two transmitting-end convex lenses 12, the target site, and then passes through the bandpass filter 21 to enter the imaging channel 226. The light then passes through the wide-angle lens 221, the receiving-end convex lens 222, the spectroscopic filter 223, and finally reaches the photosensor 224. Specifically, when passing through the two transmitting-end convex lenses 12, the light enters from the plane of one plano-convex lens, passes through the convex surface, enters the convex surface of the other plano-convex lens, and is emitted from the plane of the other plano-convex lens. The dashed and solid lines represent the paths of light emitted by the left and right light sources 112, respectively.

[0149] In some embodiments, as shown in Figure 5, the optical path of the multi-band near-infrared light-emitting shooting device is that the light emitted by the light source element 112 of the transmitting module passes through the concave mirror 114 matching the light source element 112, the two transmitting-end convex lenses 12, and the part to be measured in sequence. The light after diffuse transmission through the part to be measured then passes through the bandpass filter 21 into the imaging channel 226 and passes through the wide-angle lens 221, the receiving-end convex lens 222, the spectroscopic filter 223 in sequence and finally reaches the photoelectric sensor 224. When passing through the two transmitting-end convex lenses 12, the light enters from the plane of a plano-convex lens, passes through the convex surface, enters the convex surface of another plano-convex lens, and is emitted from the plane of the plano-convex lens.

[0150] During use, as shown in FIG6 , after placing the fingertip into the detection object fixing device, the fingertip contact triggers the mechanical switch, thereby starting the photoelectric sensor 224 and the light source element 112 through the camera board 225. After starting the light source element 112, multiple light source elements 112 sequentially emit near-infrared light of their respective wavelengths. The photoelectric sensor 224 sequentially collects multiple frames of fingertip near-infrared images at each wavelength after the near-infrared light of the wavelength passes through the fingertip in accordance with the timing of the light source element 112 sequentially emitting near-infrared light of its respective wavelength.

[0151] Then, the fingertip is taken out, and the camera board 225 receives the instruction of the external processor to store and pre-process the screened frames of photos as raw data, and applies the processed fingertip near-infrared image as a data set to the subsequent detection algorithm and finally obtains the required detection value, and finally turns off the mechanical switch.

[0152] As shown in FIG6 , an embodiment of data acquisition provided by the present invention is implemented in combination with the multi-band near-infrared light-emitting camera shown in FIG1 , 4 , and 8 . Specifically, after placing the fingertip in the detection object fixing device, the fingertip contacts and triggers the mechanical switch, thereby activating the photoelectric sensor 224 and the light source element 112 through the camera board 225 . After activating the light source element 112 , multiple light source elements 112 sequentially emit near-infrared light of their respective wavelengths. The photoelectric sensor 224 coordinates the timing of the light source element 112 sequentially emitting near-infrared light of their respective wavelengths, and sequentially collects multiple frames of fingertip near-infrared images of the fingertip after the near-infrared light of the wavelength passes through the fingertip at each wavelength. In this embodiment, specifically, the first LED light is turned on to emit near-infrared light of the first wavelength. At the same time, the photoelectric sensor 224 begins to collect 3 frames of fingertip near-infrared images of the fingertip after the near-infrared light of the first wavelength passes through the fingertip and selects the best frame. After the screening is completed, the first LED light is turned off and the second LED light is turned on, which emits near-infrared light of the second wavelength. At the same time, the photoelectric sensor 224 begins to collect 3 frames of near-infrared images of the fingertips after the second wavelength of near-infrared light passes through the fingertips and screens out the best frame. After the screening is completed, the second LED light is turned off and the third LED light is turned on, which emits near-infrared light of the third wavelength. At the same time, the photoelectric sensor 224 begins to collect 3 frames of near-infrared images of the fingertips after the third wavelength of near-infrared light passes through the fingertips and screens out the best frame. After the screening is completed, the third LED light is turned off and the fourth LED light is turned on, which emits near-infrared light of the fourth wavelength. At the same time, the photoelectric sensor 224 begins to collect 3 frames of near-infrared images of the fingertips after the fourth wavelength of near-infrared light passes through the fingertips and screens out the best frame.

[0153] Then, the fingertip is taken out, and the camera board 225 receives the instruction of the external processor to perform data pre-processing on the 4 frames of photos that have been screened out, and applies the processed fingertip near-infrared image as a data set to the subsequent detection algorithm and finally obtains the required detection value, and finally turns off the mechanical switch.

[0154] In another embodiment of the present invention, the shooting device is shown in Figures 1, 4, and 8. Each light source element 112 can emit light of several different wavelengths, and only emits light of one wavelength at the same time. At the same time, the wavelength of the light emitted by the light source element 112 is the same. Specifically, four LED lights 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 lights is simultaneously switched from the near-infrared light of the first wavelength to the near-infrared light of the second wavelength, and so on.

[0155] When using the multi-band near-infrared luminescence camera of this embodiment for data collection, its collection steps are shown in Figure 7. After the fingertip is placed in the detection object fixing device, the fingertip contacts the triggering mechanical switch to activate the photoelectric sensor 224 and the light source element 112 through the camera board 225. After the light source element 112 is activated, the light source element 112 emits multiple groups of near-infrared light of different wavelengths in sequence. The photoelectric sensor 224 cooperates with the time when the light source element 112 emits multiple groups of near-infrared light of different wavelengths in sequence, and collects multiple frames of the fingertip near-infrared image of the fingertip after the near-infrared light of the wavelength passes through the fingertip at each wavelength. Specifically, in this embodiment, four LED lights are turned on and emit near-infrared light of the first wavelength at the same time. At the same time, the photoelectric sensor 224 starts to collect 3 frames of the fingertip near-infrared image of the fingertip after the near-infrared light of the first wavelength passes through the fingertip and selects the best frame. After the screening is completed, the near-infrared light of the first wavelength emitted by the four LED lights is switched to the near-infrared light of the second wavelength. At the same time, the photoelectric sensor 224 starts to collect 3 frames of the fingertip near-infrared image of the fingertip after the near-infrared light of the second wavelength passes through the fingertip and selects the best frame. After the screening is complete, the near-infrared light emitted by the four LEDs is switched from the second wavelength to the third wavelength. Simultaneously, the photoelectric sensor 224 begins collecting three frames of near-infrared images of the fingertips after the third wavelength of near-infrared light passes through the fingertips, and the optimal frame is selected. After the screening is complete, the near-infrared light emitted by the four LEDs is switched from the third wavelength to the fourth wavelength. Simultaneously, the photoelectric sensor 224 begins collecting three frames of near-infrared images of the fingertips after the fourth wavelength of near-infrared light passes through the fingertips, and the optimal frame is selected.

[0156] Then, the fingertip is taken out, and the camera board 225 receives the instruction of the external processor to perform data pre-processing on the 4 frames of photos that have been screened out, and applies the processed fingertip near-infrared image as a data set to the subsequent detection algorithm and finally obtains the required detection value, and finally turns off the mechanical switch.

[0157] As shown in Figure 6, another embodiment of data acquisition provided by the present invention is implemented in combination with the multi-band near-infrared light-emitting shooting device shown in Figures 11 and 13. The specific steps are similar to the description of Figure 6 above. The difference is that the photoelectric sensor 224 and the light source element 112 do not need to be started through the camera board but directly.

[0158] As shown in Figure 7, another embodiment of data acquisition provided by the present invention is implemented in combination with the multi-band near-infrared light-emitting shooting device shown in Figures 11 and 13. The specific steps are similar to the description of Figure 7 above. The difference is that the photoelectric sensor 224 and the light source element 112 do not need to be started through the camera board but directly.

[0159] The above describes in detail the preferred embodiments of the present invention. It should be understood that numerous modifications and variations based on the concepts of the present invention can be made by those skilled in the art without inventive effort. Therefore, any technical solution that can be derived by those skilled in the art based on the concepts of the present invention through logical analysis, reasoning, or limited experimentation based on the existing technology should be within the scope of protection defined by the claims.

Claims

1. A multi-band near-infrared luminescence camera, characterized in that: It includes a transmitting module and a receiving module; The transmitting module includes at least one light source element and a transmitting end optical lens group; the light source elements are symmetrically arranged in the light source element installation area on the light source circuit board, so that the overlapping parts of the irradiation areas of all the light source elements cover the part to be measured, and emit near-infrared light of respective wavelengths respectively and in turn; the transmitting end optical lens group includes at least one transmitting end convex lens; The receiving module includes a bandpass filter, a receiving end optical lens group and a photoelectric sensor; The path through which the light emitted by the light source element of the transmitting module passes is, in sequence, the transmitting end optical lens group, the part to be measured, the bandpass filter, the receiving end optical lens group and the photoelectric sensor; The light passing through the bandpass filter is diffuse transmission light penetrating the part to be measured.

2. The multi-band near-infrared light-emitting camera according to claim 1, characterized in that: The transmitting module also includes 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 path through which the light emitted by the light source element of the transmitting module passes is, in sequence, the concave mirror, the transmitting end optical lens group, the part to be measured, the bandpass filter, the receiving end optical lens group and the photoelectric sensor.

3. The multi-band near-infrared light-emitting 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.

4. The multi-band near-infrared light-emitting device according to claim 1, characterized in that: The transmitting module also includes a light source temperature control system, and the light source temperature control system is installed on the back of the light source circuit board.

5. The multi-band near-infrared light-emitting camera according to claim 4, characterized in that: It also includes a detection object fixing device for placing the part to be tested; an elastic material is arranged inside the detection object fixing device for limiting and fixing the position of the part to be tested; and detection object fixing device light holes are arranged on both sides of the detection object fixing device, so that the light transmitted from the optical lens group at the transmitting end passes through the detection object fixing device light hole on one side to reach the part to be tested, passes through the detection object fixing device light hole on the other side after diffuse transmission through the part to be tested, and reaches the receiving module.

6. The multi-band near-infrared light-emitting camera according to claim 5, characterized in that: The detection object fixing device also includes a mechanical switch, and the contact of the detected part triggers the mechanical switch, thereby starting the transmitting module and the photoelectric sensor.

7. The multi-band near-infrared light-emitting camera according to claim 6, characterized in that: 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 receiving end convex lens and the spectroscopic filter are arranged in the imaging channel; the camera board is a circuit board on which the photoelectric sensor is installed, and is associated with the transmitting module, and can be externally connected to a processor to receive instructions from the processor to complete shooting, data collection, and data set analysis and sending; The path through which the light emitted by the light source element of the transmitting module passes is, in sequence, the transmitting end optical lens group, the part to be measured, the bandpass filter, the wide-angle lens, the receiving end convex lens, the spectroscopic filter, and the photoelectric sensor.

8. The multi-band near-infrared light-emitting camera according to claim 7, characterized in that: It also includes a component connection and fixing device for connecting and fixing each component respectively, and a plurality of buckles are arranged on the device for fixing the components.

9. The multi-band near-infrared light-emitting camera according to claim 8, characterized in that: The light source element is an LED lamp; the light source temperature control system is a semiconductor refrigerator; the spectroscopic filter is a linear gradient filter; the photoelectric sensor is an indium gallium arsenide detector; and the camera board is a PCB electronic circuit board.

10. The multi-band near-infrared light-emitting camera according to claim 8, characterized in that: The light source element can emit light of several wavelengths in the band of 750 to 2250nm according to the detection purpose; the bandpass filter can allow light in a certain band range of the band of 750 to 2250nm to pass according to the wavelength of the light emitted by the light source element; the spectroscopic filter can allow light of several wavelengths in the band of 750 to 2250nm to pass according to the wavelength of the light emitted by the light source element; the photoelectric sensor is black and white and can capture near-infrared images at several wavelengths in the band of 700 to 2500nm according to the wavelength of the light emitted by the light source element.

11. A method for data collection using a multi-band near-infrared light-emitting camera as claimed in any one of claims 7 to 10, characterized in that: The collection steps are as follows: The part to be tested is placed on the detection object fixing device, and the part to be tested triggers the mechanical switch through direct contact, and the mechanical switch activates the transmitting module and the photoelectric sensor through the camera board; 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; The photoelectric sensor cooperates with the light source element to sequentially emit the near-infrared light of each wavelength, and sequentially collects multiple frames of near-infrared images of the part to be measured after the near-infrared light of the wavelength passes through the part to be measured at each wavelength; At least one frame is selected from the near-infrared image of the part to be measured for preliminary data processing, and the processed near-infrared image of the part to be measured 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.

13. A multi-band near-infrared luminescence camera, characterized in that: It includes a reflective transmitting module and a receiving module; The reflective transmitting module includes at least one light source element and a transmitting end optical lens group; the light source elements are symmetrically arranged in the light source element installation area on the light source circuit board, so that the overlapping parts of the irradiation areas of all the light source elements cover the part to be measured, and emit near-infrared light of respective wavelengths respectively and in turn; the transmitting end optical lens group includes at least one transmitting end concave mirror; The receiving module includes a bandpass filter, a receiving end optical lens group and a photoelectric sensor; The path through which the light emitted by the light source element of the reflective transmitting module passes is, in sequence, the transmitting end concave mirror, the part to be measured, the bandpass filter, the receiving end optical lens group and the photoelectric sensor; The light passing through the bandpass filter is diffuse transmission light penetrating the part to be measured.

14. The multi-band near-infrared light-emitting camera according to claim 13, characterized in that: The transmitting end optical lens group also includes at least one transmitting end convex lens; the path through which the light emitted by the light source element of the reflective transmitting module passes is, in sequence, the transmitting end concave mirror, the transmitting end convex lens, the part to be measured, the bandpass filter, the receiving end optical lens group and the photoelectric sensor.

15. The multi-band near-infrared light-emitting camera according to claim 13, characterized in that: A light source circuit board light hole is provided in the middle of the light source circuit board, and the light focused by the transmitting end concave mirror passes through the light source circuit board light hole to reach the receiving module; the light source elements are arranged around the light source circuit board light hole.

16. A multi-band near-infrared luminescence camera, characterized in that: It includes a reflective transmitting module and a receiving module; The reflective transmitting module includes at least one light source element and a transmitting end optical lens group; the light source elements are symmetrically arranged in the light source element installation area on the light source circuit board, so that the overlapping parts of the irradiation areas of all the light source elements cover the part to be measured, and emit near-infrared light of respective wavelengths respectively and in turn; the transmitting end optical lens group includes at least one transmitting end concave mirror; The receiving module includes a bandpass filter and a photoelectric sensor; the photoelectric sensor is a photoelectric sensor for distortion-free macro photography; The path through which the light emitted by the light source element of the reflective emission module passes is the emission end concave mirror, the part to be measured, the bandpass filter and the photoelectric sensor in sequence; The light passing through the bandpass filter is diffuse transmission light penetrating the part to be measured.

17. The multi-band near-infrared light-emitting camera according to claim 16, characterized in that: The transmitting end optical lens group also includes at least one transmitting end convex lens; the path through which the light emitted by the light source element of the reflective transmitting module passes is the transmitting end concave mirror, the transmitting end convex lens, the part to be measured, the bandpass filter and the photoelectric sensor in sequence.

18. The multi-band near-infrared light-emitting camera according to claim 16, characterized in that: A light source circuit board light hole is provided in the middle of the light source circuit board, and the light focused by the transmitting end concave mirror passes through the light source circuit board light hole to reach the receiving module; the light source elements are arranged around the light source circuit board light hole.

19. The multi-band near-infrared light-emitting camera according to claim 16, characterized in that: The light source element is an LED lamp; the photoelectric sensor for distortion-free macro photography is an organic graphic photoelectric sensor.

20. The multi-band near-infrared light-emitting camera according to claim 16, characterized in that: The light source element can emit light of several wavelengths between 750 and 2250 nm according to the detection purpose; the bandpass filter can allow light in a certain band range of 750 to 2250 nm to pass according to the wavelength of the light emitted by the light source element; the photoelectric sensor can capture near-infrared images at several wavelengths in the 700 to 2500 nm band according to the wavelength of the light emitted by the light source element.

21. A multi-band near-infrared luminescence camera, characterized in that: It includes a transmitting module and a receiving module; The transmitting module includes at least one light source element and a transmitting end optical lens group; the light source elements are symmetrically arranged in the light source element installation area on the light source circuit board, so that the overlapping parts of the irradiation areas of all the light source elements cover the part to be measured, and emit near-infrared light of respective wavelengths respectively and in turn; the transmitting end optical lens group includes at least one transmitting end convex lens; The receiving module includes a bandpass filter and a photoelectric sensor; the photoelectric sensor is a photoelectric sensor for distortion-free macro photography; The path through which the light emitted by the light source element of the transmitting module passes is the transmitting end optical lens group, the part to be measured, the bandpass filter and the photoelectric sensor in sequence; The light passing through the bandpass filter is diffuse transmission light penetrating the part to be measured.

22. The multi-band near-infrared light-emitting camera according to claim 21, characterized in that: The light source element is an LED lamp; the photoelectric sensor for distortion-free macro photography is an organic graphic photoelectric sensor.

23. The multi-band near-infrared light-emitting camera according to claim 21, characterized in that: The light source element can emit light of several wavelengths between 750 and 2250 nm according to the detection purpose; the bandpass filter can allow light in a certain band range of 750 to 2250 nm to pass according to the wavelength of the light emitted by the light source element; the photoelectric sensor can capture near-infrared images at several wavelengths in the 700 to 2500 nm band according to the wavelength of the light emitted by the light source element.

Images