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WO2024259790A1 - Appareil de photographie émettant de la lumière proche infrarouge à réflexion diffuse multibande et procédé d'acquisition de données - Google Patents

Appareil de photographie émettant de la lumière proche infrarouge à réflexion diffuse multibande et procédé d'acquisition de données Download PDF

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Publication number
WO2024259790A1
WO2024259790A1 PCT/CN2023/110964 CN2023110964W WO2024259790A1 WO 2024259790 A1 WO2024259790 A1 WO 2024259790A1 CN 2023110964 W CN2023110964 W CN 2023110964W WO 2024259790 A1 WO2024259790 A1 WO 2024259790A1
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WIPO (PCT)
Prior art keywords
light
light source
infrared
wavelength
source element
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PCT/CN2023/110964
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English (en)
Chinese (zh)
Inventor
邓庆平
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Suzhou Optima Medical Solutions Inc
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Suzhou Optima Medical Solutions Inc
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Publication of WO2024259790A1 publication Critical patent/WO2024259790A1/fr
Anticipated expiration legal-status Critical
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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration or pH-value ; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid or cerebral tissue
    • A61B5/1455—Measuring characteristics of blood in vivo, e.g. gas concentration or pH-value ; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid or cerebral tissue using optical sensors, e.g. spectral photometrical oximeters
    • A61B5/14551—Measuring characteristics of blood in vivo, e.g. gas concentration or pH-value ; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid or cerebral tissue using optical sensors, e.g. spectral photometrical oximeters for measuring blood gases
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration or pH-value ; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid or cerebral tissue
    • A61B5/14532—Measuring characteristics of blood in vivo, e.g. gas concentration or pH-value ; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid or cerebral tissue for measuring glucose, e.g. by tissue impedance measurement
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
    • A61B5/6802—Sensor mounted on worn items
    • A61B5/681—Wristwatch-type devices
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/40—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters with provision for controlling spectral properties, e.g. colour, or intensity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present invention relates to the field of medical equipment and non-invasive detection, and in particular to a multi-band diffuse reflection near-infrared luminescence shooting device and a data acquisition method.
  • near-infrared spectroscopy NIRS
  • NIRCI near-infrared chemical imaging
  • transmission near-infrared spectroscopy and near-infrared chemical imaging carry effective information on the concentration of the components to be measured in the blood, which can be used for quantitative analysis.
  • the object of the present invention is to provide a multi-band diffuse reflection near-infrared luminescence shooting device, which can solve at least one of the above-mentioned problems.
  • the present invention adopts the following technical solution:
  • 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 comprises 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, that is, each light source element corresponds to a concave mirror. There is 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.
  • one light source element corresponds to one concave mirror and is installed at the center of the concave surface of the corresponding concave mirror.
  • the light source elements are arranged on a light source circuit board and emit near-infrared light of respective wavelengths respectively and in turn.
  • 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.
  • 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;
  • the light passing through the bandpass filter is near-infrared light diffusely reflected by the part to be measured.
  • 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.
  • the light source element can emit light of several different wavelengths, and emit only one wavelength of light at the same time; at the same time, the wavelength of light emitted by several of the light source elements is the same.
  • the photoelectric sensor is a distortion-free macro photography photoelectric sensor, which refers to a photoelectric sensor capable of performing distortion-free imaging in macro scenes, and an organic photoelectric sensor (OPD) is one of the most widely used ones currently.
  • OPD organic photoelectric sensor
  • 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.
  • 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.
  • a centrally symmetrical annular belt is provided around the light-through 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.
  • 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.
  • the bandpass filter can allow light in any wavelength range of 750 to 2250 nm to pass according to the needs of actual applications.
  • the bandpass filter is arranged between the light hole and the photoelectric sensor, preferably at the light hole to save equipment space.
  • the photoelectric sensor is an organic photoelectric sensor (OPD) and can capture near-infrared images in any band range of 750nm to 2250nm according to application requirements.
  • OPD organic photoelectric sensor
  • 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 a low requirement for imaging object distance, it does not require lens focusing when using it for macro imaging.
  • 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 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.
  • 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.
  • the present invention also provides a method for data collection using the multi-band diffuse reflection near-infrared luminescence shooting device as described above, and the collection steps are as follows:
  • the transmitting module and the photoelectric sensor are started;
  • 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 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.
  • the near-infrared images of the part to be tested include but are not limited to photos, videos and spectrograms.
  • the method can be used to collect near-infrared photos, continuous videos and spectrograms, etc.
  • the photoelectric sensor 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.
  • the present invention also provides another multi-band diffuse reflection near-infrared luminescence shooting device, which includes 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 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 correspondingly 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 at least one light source element is arranged on a light source circuit board and emits near-infrared light of respective wavelengths respectively and in turn.
  • 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.
  • the receiving module includes a bandpass filter, a receiving end optical lens group 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, the receiving end optical lens group 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.
  • 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.
  • the light source element can emit light of several different wavelengths, and only emit emits light of one wavelength; at the same time, the wavelength of light emitted by several light source elements is the same.
  • the photosensor is a complementary metal oxide semiconductor (CMOS) photosensor.
  • CMOS complementary metal oxide semiconductor
  • 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.
  • a light hole is provided in the middle of the light source circuit board, and 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.
  • a centrally symmetrical annular belt is provided at the periphery of the light-through hole, on which the light source element and the concave mirror are mounted.
  • 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 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 connected to an external 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 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.
  • 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.
  • the bandpass filter can allow light in any wavelength range of 750 to 2250 nm to pass according to the needs of practical applications.
  • the photoelectric sensor is an InGaAs detector, and can capture near-infrared images in any wavelength range between 750 nm and 2250 nm according to application requirements.
  • the spectroscopic filter is a linear gradient filter and allows light in any wavelength range of 750 to 2250 nm to pass through.
  • 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 1100 nm; the bandpass filter allows the wavelength of 750 to 1100 nm.
  • the multi-band diffuse reflection near-infrared luminescence shooting device is used to measure the blood sugar index of the user and the hemoglobin concentration of anemia patients, etc.
  • 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 of the 1550-1650 nm band to pass through;
  • the spectroscopic filter is a linear gradient filter, and allows light in any wavelength range of the 1550-1650 nm band 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 of the 1550-1650 nm band according to application requirements;
  • the multi-band diffuse reflection near-infrared luminescence shooting device is used to measure the user's uric acid index
  • the present invention also provides a method for data collection using another multi-band diffuse reflection near-infrared luminescence shooting device as described above, and the collection steps are as follows:
  • the transmitting module and the photoelectric sensor are activated through the camera board;
  • 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.
  • the near-infrared images of the part to be tested include but are not limited to photos, videos and spectrograms.
  • the method can be used to collect near-infrared photos, continuous videos and spectrograms, etc.
  • the photoelectric sensor 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 emit the near-infrared light of the previous wavelength.
  • the light source element is switched 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.
  • 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, so that multiple groups of detection data at different wavelengths can be collected in one detection, which is helpful to improve the detection accuracy; in addition, the shooting device arranges the light source elements appropriately on the light source circuit board so that the overlapping parts of the irradiation areas of all light source elements cover the area to be tested, 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, 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, thereby eliminating interference from other near-infrared light and visible light in
  • FIG. 1 is a schematic diagram of the structure of a multi-band diffuse reflection near-infrared luminescence shooting device
  • FIG. 2 is a schematic diagram of the optical path of a multi-band diffuse reflection near-infrared luminescence shooting device
  • Figure 3 is a side view of the light source circuit board
  • Figure 4 is a top view of the front of the light source circuit board
  • Figure 5 is a top view of the back of the light source circuit board
  • FIG. 6 is a flow chart of data acquisition using a multi-band near-infrared luminescence imaging device
  • FIG. 7 is another flow chart of data acquisition using a multi-band near-infrared luminescence imaging device
  • FIG8 is a schematic diagram of the structure and optical path of another multi-band diffuse reflection near-infrared luminescence shooting device
  • FIGS. 1 to 5 One embodiment of the present invention, as shown in FIGS. 1 to 5 , is a multi-band diffuse reflection near-infrared luminescence camera, which includes a transmitting module and a receiving module.
  • the transmitting module includes four light source elements 1, a light source circuit board 2 and a concave mirror 3.
  • the light source element is an LED lamp.
  • 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 turn.
  • 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.
  • only the light source elements 1 that emit light of the same wavelength are turned on.
  • 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.
  • a light source element 1 is equipped with a concave mirror 3 to respectively converge the light emitted by the light source element 1, and the light source element 1 is installed at the concave surface of the concave mirror 3; the concave mirror 3 makes the near-infrared light irradiation area of the light source element 1 evenly cover the part to be measured.
  • 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 in a designated area of the part to be measured 5.
  • the part to be measured 5 in this embodiment is the skin of the user's wrist.
  • a light-through hole 4 (the dark gray part in the middle of FIGS. 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 outside the light-through hole 4, on which four light-source elements 1 and four concave mirrors 3 are mounted, and most of the electronic circuits are arranged outside the ring belt 8 of the light-source circuit board 2.
  • the receiving module includes a bandpass filter 6 and a photoelectric sensor 7.
  • Bandpass filter 6 The bandpass filter 6 is arranged between the light hole 4 and the photoelectric sensor 7, preferably 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.
  • the photoelectric sensor is an organic photoelectric sensor (OPD).
  • OPD organic photoelectric sensor
  • 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 a low requirement for the imaging object distance, it does not need to use a lens for focusing when using it for macro imaging.
  • the path through which the light signal emitted by the light source element 1 of the transmitting module passes is the concave mirror 3, the part to be measured 5, the light hole 4, the bandpass filter 6 and the photoelectric sensor 7 in sequence; the light signal passing through the bandpass filter 6 is the near-infrared light diffusely reflected by the part to be measured 5.
  • the receiving module further includes a spectroscopic filter 94, a camera board 96 and a receiving end optical lens group;
  • the receiving end optical lens group includes a wide-angle lens 91 and a receiving end 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 arranged in the imaging channel;
  • the camera 96 board is a circuit board, on which a photoelectric sensor is installed, and is associated with the transmitting module, and can be connected to an external processor to receive instructions from the processor to complete shooting, data collection, and data set analysis and transmission;
  • the photoelectric sensor is a CMOS photoelectric sensor 95 (for example, an indium gallium arsenide detector);
  • the path through which the light emitted by the light source element 1 of the transmitting module passes is, in sequence, a concave mirror 3, a part to be measured 5, a bandpass filter 6, a wide-angle lens 91,
  • the present invention can be embedded in portable devices such as watches or bracelets for close-range measurement of blood sugar indexes, anemia indexes, uric acid indexes, etc.
  • the light source element 1 emits light in the band between 750 and 2250 nm
  • the bandpass filter 6 allows light in any band between 750 and 2250 nm to pass through
  • the photoelectric sensor 7 is an organic photoelectric sensor and can shoot near-infrared images in any band between 750 and 2250 nm according to application requirements.
  • the measurement purpose in this embodiment is to obtain the user's blood sugar index. Therefore, the wavelength band of the light emitted by the light source element 1 is between 750 and 1000nm, and the bandpass filter 6 allows the passage of the wavelength band between 750 and 1000nm; the photoelectric sensor 7 is an organic photoelectric sensor and can capture near-infrared images between the wavelength band of 750 and 1000nm according to application requirements.
  • the wavelength band of the light emitted by the light source element 1 is between 760 and 1100 nm, and the bandpass filter 6 allows the passage of the wavelength band between 760 and 1100 nm;
  • the photoelectric sensor 7 is an organic photoelectric sensor and can capture near-infrared images between the wavelength band of 760 and 1100 nm according to application requirements.
  • the wavelength band of the light emitted by the light source element 1 is 1600nm, and the bandpass filter 6 allows light with a wavelength of 1600nm to pass;
  • the photoelectric sensor 7 is an organic photoelectric sensor and can capture near-infrared images with a wavelength of 1600nm according to application requirements.
  • the collection steps are shown in FIG6.
  • the transmitting module and the photoelectric sensor 7 are started.
  • the light source element 1 is turned on at the same time, and multiple light source elements 1 emit multiple groups of near-infrared light of different wavelengths in sequence.
  • the photoelectric sensor 7 cooperates with the time when the light source element 1 emits multiple near-infrared light of different wavelengths in sequence, and collects multiple frames of near-infrared images of the part to be measured after diffuse reflection of the near-infrared light of the wavelength by the part to be measured 5 at each wavelength.
  • the first LED light is turned on to emit near-infrared light of the first wavelength.
  • the photoelectric sensor 7 starts to collect 3 frames of near-infrared images of the wrist after diffuse reflection of the near-infrared light of the first wavelength by the skin of the wrist and selects the best frame.
  • the first LED light is turned off, and the second LED light is turned on, which emits near-infrared light of the second wavelength.
  • the photoelectric sensor 7 starts to collect 3 frames of near-infrared images of the wrist after diffuse reflection of the near-infrared light of the second wavelength by the skin of the wrist and selects the best frame.
  • the second LED light is turned off and the third LED light is turned on, which emits near-infrared light of the third wavelength.
  • the photoelectric sensor 7 starts to collect 3 frames of near-infrared images of the wrist after diffuse reflection of the third wavelength near-infrared light by the wrist skin and selects the best frame.
  • the third LED light is turned off and the fourth LED light is turned on, which emits near-infrared light of the fourth wavelength.
  • the photoelectric sensor 7 starts to collect 3 frames of near-infrared images of the wrist after diffuse reflection of the fourth wavelength near-infrared light by the wrist skin and selects the best frame.
  • a light source element 1 emits light of only one wavelength
  • multiple light sources 1 and 2 emit light of only one wavelength at the same time.
  • the light source elements 1 emit light of the same wavelength.
  • 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
  • another three LED lamps are turned on at the same time to emit near-infrared light of a fourth wavelength.
  • the screened 4 frames of photos are used as raw data for data pre-processing through an external processor, and the processed wrist near-infrared images are used as data sets for subsequent detection algorithms to ultimately obtain the required detection values.
  • the photoelectric sensor 7 starts to collect 3 frames of wrist near-infrared images of the near-infrared light of the wavelength after diffuse reflection from the wrist skin and selects the best frame. Subsequently, the selected frame of photos is used as raw data for data pre-processing through an external processor, and the processed wrist near-infrared image is used as a data set for subsequent detection algorithms to finally obtain the required detection value.
  • the transmitting module of this embodiment includes a light source element 1, a light source circuit board 2 and a concave mirror 3.
  • 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 arranged at the center of the concave surface of the concave mirror 3; the concave mirror 3 makes the near-infrared light irradiation area of the light source element 1 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 user's wrist skin.
  • the light source element is located at the center of the light source circuit board.
  • the position of the light through hole is also changed, that is, a circle of light through holes is provided around the periphery of the light source element.
  • a light through hole 4 is provided at the center of the light source circuit board 2 (the middle one in FIG. 4 and FIG. 5 ).
  • 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.
  • 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.
  • the photoelectric sensor is an organic photoelectric sensor (OPD).
  • OPD organic photoelectric sensor
  • 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.
  • the present invention can be embedded in portable devices such as watches or bracelets for close-range measurement of blood sugar indexes, anemia indexes, uric acid indexes, etc.
  • the light source element 1 emits light in the band between 750 and 2250 nm
  • the bandpass filter 6 allows light in any band between 750 and 2250 nm to pass through
  • the photoelectric sensor 7 is an organic photoelectric sensor and can shoot near-infrared images in any band between 750 and 2250 nm according to application requirements.
  • the measurement purpose in this embodiment is to obtain the user's blood sugar index. Therefore, the wavelength band of the light emitted by the light source element 1 is between 750 and 1000nm, and the bandpass filter 6 allows the passage of the wavelength band between 750 and 1000nm; the photoelectric sensor 7 is an organic photoelectric sensor and can capture near-infrared images between the wavelength band of 750 and 1000nm according to application requirements.
  • the wavelength band of the light emitted by the light source element 1 is between 760 and 1100 nm, and the bandpass filter 6 allows the passage of the wavelength band between 760 and 1100 nm;
  • the photoelectric sensor 7 is an organic photoelectric sensor and can capture near-infrared images between the wavelength band of 760 and 1100 nm according to application requirements.
  • the wavelength of the light emitted by the light source element 1 is 1600nm, and the bandpass filter 6 allows the light of 1600nm wavelength to pass; the photoelectric sensor 7 is an organic
  • the photoelectric sensor can also capture near-infrared images at a wavelength of 1600nm according to application requirements. At this time, only one wavelength, namely the uric acid index at a wavelength of 1600nm, needs to be obtained.
  • the collection steps are shown in FIG7.
  • the transmitting module and the photoelectric sensor 7 are started.
  • the light source element 1 is turned on at the same time, and the light source element 1 emits near-infrared light of multiple different wavelengths in sequence.
  • the photoelectric sensor 7 cooperates with the time when the light source element 1 emits near-infrared light of multiple different wavelengths in sequence, and collects multiple frames of near-infrared images of the part to be measured after diffuse reflection of the near-infrared light of the wavelength by the part to be measured 6 at each wavelength.
  • the LED lamp is turned on to emit near-infrared light of the first wavelength.
  • the photoelectric sensor 7 starts to collect 3 frames of near-infrared images of the wrist after diffuse reflection of the near-infrared light of the first wavelength by the skin of the wrist and selects the best frame.
  • the near-infrared light of the first wavelength emitted by the LED lamp is switched to the near-infrared light of the second wavelength.
  • the photoelectric sensor 7 starts to collect 3 frames of near-infrared images of the wrist after diffuse reflection of the near-infrared light of the second wavelength by the skin of the wrist and selects the best frame.
  • the near-infrared light of the second wavelength emitted by the LED lamp is switched to the near-infrared light of the third wavelength.
  • the photoelectric sensor 7 starts to collect 3 frames of near-infrared images of the wrist after diffuse reflection of the near-infrared light of the third wavelength by the skin of the wrist and screens out the best frame.
  • the near-infrared light of the third wavelength emitted by the LED lamp is switched to the near-infrared light of the fourth wavelength.
  • the photoelectric sensor 7 starts to collect 3 frames of near-infrared images of the wrist after diffuse reflection of the near-infrared light of the fourth wavelength by the skin of the wrist and screens out the best frame.
  • the 4 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 data sets for subsequent detection algorithms to ultimately obtain the required detection values.

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Abstract

La présente invention concerne un appareil de photographie émettant de la lumière proche infrarouge à réflexion diffuse multibande et un procédé d'acquisition de données l'utilisant. L'appareil comprend un module de transmission et un module de réception. Le module de transmission comprend au moins un élément source de lumière et au moins un miroir concave pour faire converger la lumière émise par l'élément source de lumière ; les éléments sources de lumière sont en correspondance biunivoque avec les miroirs concaves ; et les éléments sources de lumière sont agencés sur une carte de circuit de source de lumière et émettent séquentiellement une lumière proche infrarouge de longueurs d'onde respectives. Le module de réception comprend un filtre passe-bande et un capteur photoélectrique ; un signal optique émis par l'élément source de lumière du module de transmission passe séquentiellement à travers le miroir concave, une partie à tester, le filtre passe-bande et le capteur photoélectrique ; et le signal optique traversant le filtre passe-bande est une lumière proche infrarouge réfléchie de manière diffuse par ladite partie. Selon l'appareil fourni par la présente invention, des sources de lumière peuvent converger uniformément dans des zones d'éclairage efficaces, et l'interférence d'une autre lumière proche infrarouge et de la lumière visible parmi la lumière ambiante est éliminée, ce qui permet de réduire le bruit, et d'améliorer davantage la précision de test.
PCT/CN2023/110964 2023-06-21 2023-08-03 Appareil de photographie émettant de la lumière proche infrarouge à réflexion diffuse multibande et procédé d'acquisition de données Pending WO2024259790A1 (fr)

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