CN116616765A - Multi-band diffuse reflection near infrared light-emitting shooting device and data acquisition method - Google Patents

Multi-band diffuse reflection near infrared light-emitting shooting device and data acquisition method Download PDF

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CN116616765A
CN116616765A CN202310744145.1A CN202310744145A CN116616765A CN 116616765 A CN116616765 A CN 116616765A CN 202310744145 A CN202310744145 A CN 202310744145A CN 116616765 A CN116616765 A CN 116616765A
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light
near infrared
light source
band
wavelength
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邓庆平
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Suzhou Optimization Medical Technology Co ltd
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    • 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, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
    • A61B5/1455—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using optical sensors, e.g. spectral photometrical oximeters
    • A61B5/14551—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, 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, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
    • A61B5/14532—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, 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]

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  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Surgery (AREA)
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  • Heart & Thoracic Surgery (AREA)
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  • Molecular Biology (AREA)
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  • General Engineering & Computer Science (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

The invention relates to a multiband diffuse reflection near infrared light-emitting shooting device and a data acquisition method thereof. The device comprises a transmitting module and a receiving module; the emitting module comprises at least one light source element and at least one concave mirror for converging light emitted by the light source element; the light source elements are in one-to-one correspondence with the concave mirrors; the light source elements are arranged on the light source circuit board and respectively emit near infrared light with respective wavelengths in sequence. The receiving module comprises a band-pass filter and a photoelectric sensor; the path through which the light signal emitted by the light source element of the emission module passes is a concave mirror, a part to be detected, a band-pass filter and a photoelectric sensor in sequence; the optical signal passing through the band-pass filter is near infrared light diffusely reflected by the part to be detected. The device provided by the invention can enable the light source to be uniformly converged in the effective illumination area, simultaneously prevent the interference of other near infrared light and visible light in the ambient light, reduce noise and further improve detection accuracy.

Description

Multi-band diffuse reflection near infrared light-emitting shooting device and data acquisition method
Technical Field
The invention relates to the field of medical equipment and noninvasive detection, in particular to a multiband diffuse reflection near infrared light-emitting shooting device and a data acquisition method.
Background
The method has the advantages of no wound, no pain, no consumable, quick analysis and the like in the detection application of medical indexes of various diseases by utilizing the characteristics of near infrared special physical parameters, collecting data and then analyzing the data parameters, in particular, near infrared spectroscopy (NIRS) and near infrared chemical imaging (NIRCI) analysis technologies, can effectively overcome the defects existing in the conventional invasive detection method, is favorable for realizing the screening, diagnosis, prevention and treatment of various diseases, and has great social benefit and medical value. Physical theory and experiment show that the transmission near infrared spectrum and near infrared chemical imaging carry effective information of the concentration of the component to be detected in blood, and can be used for quantitative analysis.
However, the technical scheme of performing non-invasive detection by using NIRS or NIRCI analysis technology provided by the prior art cannot realize the characteristics of high brightness, multiband, low noise and the like of the non-invasive detection device, and simultaneously, the characteristics of convergence, uniform brightness in an effective illumination area, high light energy utilization rate and good structural stability are satisfied.
Disclosure of Invention
In view of the foregoing drawbacks of the prior art, an object of the present invention is to provide a multi-band diffuse reflection near infrared light-emitting photographing device, which can solve at least one of the above problems,
in order to achieve the above purpose, the invention adopts the following technical scheme:
a multi-band diffuse reflection near infrared light-emitting shooting device is characterized in that,
comprises a transmitting module and a receiving module;
the emitting module comprises at least one light source element and at least one concave mirror for converging light emitted by the light source element; the light source elements are in one-to-one correspondence with the concave mirrors, namely, each light source element is correspondingly provided with one or more concave mirrors, the installation positions of the concave mirrors are determined according to the installation positions of the light source elements, and preferably, one light source element corresponds to one concave mirror and is installed at the center of the concave surface of the corresponding concave mirror;
the light source elements are arranged on the light source circuit board and respectively emit near infrared light with respective wavelengths in sequence, and near infrared light emitted by the light source elements is near infrared light with a preselected wavelength; the concave mirror enables the near infrared light irradiation area of the light source element to uniformly cover the part to be measured, and particularly, the concave mirror can adjust the light path of the near infrared light emitted by the light source element, so that the adjusted near infrared light is uniformly converged in the appointed area of the part to be measured.
The receiving module comprises a band-pass filter and a photoelectric sensor; the path of the light emitted by the light source element of the emitting module is sequentially the concave mirror, the part to be detected, the band-pass filter and the photoelectric sensor;
the light passing through the band-pass filter is near infrared light which is diffusely reflected by the part to be detected.
In some embodiments, the light source element emits light of only one wavelength, and the wavelengths of the light emitted by the light source elements may be the same or different; only the light source elements that emit light of the same wavelength are turned on at the same time.
In some embodiments, the light source element may emit light of several different wavelengths, only one wavelength at a time; at the same time, the wavelengths of the light emitted by the light source elements are the same.
In some embodiments, the photosensor is an undistorted macro-imaging photosensor, which refers to a photosensor capable of undistorted imaging in macro scenes, and an Organic Photosensor (OPD) is one of the more currently used.
In some embodiments, the bandpass filter does not allow light of a wavelength less than the minimum wavelength emitted by the light source element to pass, nor does it allow light of a wavelength greater than the maximum wavelength emitted by the light source element to pass.
In some embodiments, a light passing hole is formed in the middle of the light source circuit board, and light diffusely reflected by the to-be-detected part passes through the light passing hole, is filtered by the band-pass filter and finally reaches the photoelectric sensor; the light source elements and the concave mirrors are arranged around the periphery of the light transmission hole.
In some embodiments, a central symmetrical annular band is arranged at the periphery of the light passing hole, and the light source element and the concave mirror are arranged on the annular band; the endless belt is circular or square, and most of the electronic circuits are arranged on the outer part of the endless belt of the light source circuit board.
In some embodiments, the light source element is an LED near infrared lamp or an LD near infrared lamp, and the emitted light has a wavelength band between 750 and 2250 nm.
In some embodiments, the band-pass filter may allow light of a wavelength range of 750-2250 nm wave Duan Naren to pass through according to practical application requirements, and the band-pass filter is disposed between the light-passing hole and the photoelectric sensor, preferably disposed at the light-passing hole to save equipment space.
In some implementations, the photosensors are Organic Photosensors (OPDs) and can capture near infrared images of a band interval of 750nm to 2250nm waves Duan Naren, depending on the application requirements. The organic photoelectric sensor has the characteristics of mechanical flexibility, easiness in processing, adjustable photoelectric property and excellent light sensing performance. Because the organic photoelectric sensor has low requirement on imaging object distance, lens focusing is not needed when the organic photoelectric sensor is used for micro-distance imaging.
In some embodiments, the light source element is an LED near infrared lamp or an LD near infrared lamp, and the emitted light has a wavelength band between 750 and 1100 nm; the band-pass filter allows light in a wavelength range of 750-1100 nm waves Duan Naren to pass through; the photoelectric sensor is an organic photoelectric sensor and can shoot a near infrared image of a wave Duan Naren band interval of 750-1100 nm according to application requirements; the multiband diffuse reflection near infrared light-emitting shooting device is used for measuring blood glucose indexes of a user, hemoglobin concentration of anaemia and the like.
In some embodiments, the light source element is an LED near infrared lamp or an LD near infrared lamp, and the emitted light has a wavelength band between 1550 and 1650 nm; the band-pass filter allows light in a band interval of 1550-1650 nm waves Duan Naren to pass through; the photoelectric sensor is an organic photoelectric sensor and can shoot a near infrared image of a band interval of 1550-1650 nm waves Duan Naren according to application requirements; the multiband diffuse reflection near infrared light-emitting shooting device is used for measuring uric acid indexes of a user.
The invention also provides a method for collecting data by using the multiband diffuse reflection near infrared light-emitting shooting device, which comprises the following collecting steps:
after the part to be measured is placed, the transmitting module and the photoelectric sensor are started;
the light source elements sequentially emit near infrared light with respective wavelengths, and the wavelengths of the light emitted by the light source elements are the same at the same time;
the photoelectric sensor is matched with the time of the light source element to sequentially emit near infrared light with respective wavelengths, and continuously collects near infrared images of the to-be-detected part after diffuse reflection of near infrared light with the wavelengths for a plurality of frames of the wavelengths at each wavelength;
and screening at least one frame in the near infrared image of the part to be detected, performing data pre-processing through an external processor, and applying the processed near infrared image of the part to be detected as a data set to subsequent application.
The near infrared image of the part to be detected comprises but is not limited to a photo, a video and a spectrogram, and the method can be used for collecting the near infrared photo, continuous video and the spectrogram and the like.
Preferably, after the photoelectric sensor collects the near infrared image of the part to be measured at the previous wavelength and confirms that the image can meet the collection purpose, the light source element which emits near infrared light at the previous wavelength is switched to the light source element which emits near infrared light at the next wavelength by emitting a feedback signal until the near infrared light images at all wavelengths are collected.
The invention also provides another multiband diffuse reflection near infrared light-emitting shooting device, which comprises a transmitting module and a receiving module;
the emitting module comprises at least one light source element and at least one concave mirror for converging light emitted by the light source element; the light source elements are in one-to-one correspondence with the concave mirrors, namely, each light source element is correspondingly provided with one or more concave mirrors, the installation positions of the concave mirrors are determined according to the installation positions of the light source elements, and preferably, one light source element corresponds to one concave mirror and is installed at the center of the concave surface of the corresponding concave mirror;
the at least one light source element is arranged on the light source circuit board and respectively emits near infrared light with respective wavelengths in sequence, and near infrared light emitted by the light source element is near infrared light with a preselected wavelength; the concave mirror enables the near infrared light irradiation area of the light source element to uniformly cover the part to be measured, and particularly, the concave mirror can adjust the light path of the near infrared light emitted by the light source element, so that the adjusted near infrared light is uniformly converged in the appointed area of the part to be measured.
The receiving module comprises a band-pass filter, a receiving end optical lens group and a photoelectric sensor;
the path through which the optical signal emitted by the light source element of the emission module passes is sequentially the concave mirror, the part to be detected, the band-pass filter, the receiving end optical lens group and the photoelectric sensor;
the optical signal passing through the band-pass filter is near infrared light diffusely reflected by the part to be detected.
In some embodiments, the light source element emits light of only one wavelength, and the wavelengths of the light emitted by the light source elements may be the same or different; only the light source elements that emit light of the same wavelength are turned on at the same time.
In some embodiments, the light source element may emit light of several different wavelengths, only one wavelength at a time; at the same time, the wavelengths of the light emitted by the light source elements are the same.
In some implementations, the photosensor is a Complementary Metal Oxide Semiconductor (CMOS) photosensor.
In some embodiments, the bandpass filter does not allow light of a wavelength less than the minimum wavelength emitted by the light source element to pass, nor does it allow light of a wavelength greater than the maximum wavelength emitted by the light source element to pass.
In some embodiments, a light passing hole is formed in the middle of the light source circuit board, and light diffusely reflected by the to-be-detected part passes through the light passing hole, is filtered by the band-pass filter and reaches the photoelectric sensor; the light source elements and the concave mirrors are arranged around the periphery of the light transmission hole.
In some embodiments, a central symmetrical annular band is arranged at the periphery of the light passing hole, and the light source element and the concave mirror are arranged on the central symmetrical annular band.
In some embodiments, the receiving module further comprises a spectral filter, a camera plate; the receiving end optical lens group comprises a wide-angle lens and a receiving end convex lens; an imaging channel is formed between the wide-angle lens and the camera plate, and the spectral filter is arranged in the imaging channel; the camera board is a circuit board, is provided with the photoelectric sensor, is associated with the transmitting module, and can be externally connected with a processor to receive instructions of the processor to complete shooting, data acquisition, data set analysis, transmission and other works;
the path through which the light emitted by the light source element of the emission module passes is the concave mirror, the part to be detected, the band-pass filter, the wide-angle lens, the receiving end convex lens, the beam-splitting filter and the photoelectric sensor in sequence.
In some embodiments, the light source element is an LED near infrared lamp or an LD near infrared lamp, and the emitted light has a wavelength band between 750 and 2250 nm.
In some embodiments, the bandpass filter may allow light in any band interval of 750-2250 nm according to the needs of practical applications to pass.
In some embodiments, the photosensor is an InGaAs detector, and can capture near infrared images of any band interval between 750nm and 2250nm according to application requirements.
In some embodiments, the spectral filter is a linear graded filter and allows light in any band interval of the 750-2250 nm band to pass.
In some embodiments, the light source element is an LED near infrared lamp or an LD near infrared lamp, and the emitted light has a wavelength band between 750 and 1100 nm; the band-pass filter allows light in a wavelength range of 750-1100 nm waves Duan Naren to pass through; the light splitting filter is a linear gradient filter and allows light in any band interval of 750-1100 nm to pass through; the photoelectric sensor is an InGaAs detector, is black and white and can shoot a near infrared image of a wavelength interval of 750-1100 nm waves Duan Naren according to application requirements; the multiband diffuse reflection near infrared light-emitting shooting device is used for measuring blood glucose indexes of a user, hemoglobin concentration of anaemia and the like.
In some embodiments, the light source element is an LED near infrared lamp or an LD near infrared lamp, and the emitted light has a wavelength band between 1550 and 1650 nm; the band-pass filter allows light in a band interval of 1550-1650 nm waves Duan Naren to pass through; the light splitting filter is a linear gradient filter and allows light in any band interval of 1550-1650 nm to pass through; the photoelectric sensor is an InGaAs detector, is black and white and can shoot a near infrared image of 1550-1650 nm wave Duan Naren-band interval according to application requirements; the multiband diffuse reflection near infrared light-emitting shooting device is used for measuring uric acid indexes of users
The invention also provides a method for collecting data by using the other multiband diffuse reflection near infrared light-emitting shooting device, which comprises the following collecting steps:
after the part to be measured is placed, the transmitting module and the photoelectric sensor are started through the camera plate;
the light source elements sequentially emit near infrared light with respective wavelengths, and the wavelengths of the light emitted by the light source elements are the same at the same time;
the photoelectric sensor is matched with the time of the light source element to sequentially emit near infrared light with respective wavelengths, and continuously collects near infrared images of the to-be-detected part after diffuse reflection of near infrared light with the wavelengths for a plurality of frames of the wavelengths at each wavelength;
and screening at least one frame in the near infrared image of the part to be detected, performing data pre-processing through an external processor, and applying the processed near infrared image of the part to be detected as a data set to subsequent application.
The near infrared image of the part to be detected comprises but is not limited to a photo, a video and a spectrogram, and the method can be used for collecting the near infrared photo, continuous video and the spectrogram and the like.
Preferably, after the photoelectric sensor collects the near infrared image of the part to be measured at the previous wavelength and confirms that the image can meet the collection purpose, the light source element which emits near infrared light at the previous wavelength is switched to the light source element which emits near infrared light at the next wavelength by emitting a feedback signal until the near infrared light images at all wavelengths are collected.
The invention has the beneficial effects that:
the multiple light source elements on the multiband diffuse reflection near-infrared light-emitting shooting device can respectively and sequentially emit near-infrared light with different wavelengths, so that detection data under multiple groups of different wavelengths can be collected in one-time detection, and the detection precision is improved; in addition, the shooting device properly arranges the light source elements on the light source circuit board, so that the overlapping part of the irradiation areas of all the light source elements covers the area to be detected, errors caused by different positions of the light source elements when multi-band data acquisition is reduced, and concave mirrors are arranged in front of each light source element in a matching way, so that the light source can realize uniformity while meeting convergence, namely, the light source can be finally and uniformly converged in the detection area, and the detection precision is improved; and the receiving module is provided with a band-pass filter which only allows near infrared light in a specific wave band interval emitted by the light source component to pass through so as to filter other light, thereby avoiding interference of other near infrared light and visible light in the environment light, reducing noise and further improving detection accuracy.
The conception, specific structure, and technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, features, and effects of the present invention.
Drawings
Fig. 1 is a schematic diagram of a multiband diffuse reflection near infrared light emitting imaging device
Fig. 2 is a schematic diagram of an optical path of a multiband diffuse reflection near infrared light-emitting photographing device
Fig. 3 is a side view of a light source circuit board
FIG. 4 is a top plan view of the front side of the light source circuit board
FIG. 5 is a top view of the back side of the light source circuit board
FIG. 6 is a flow chart of data acquisition using a multiband near infrared light emitting camera
FIG. 7 is another flow chart of data acquisition using a multiband near infrared light emitting camera
Fig. 8 is a schematic view of the structure and optical path of another multiband diffuse reflection near infrared light emitting camera
In the figure, 1, a light source element, 2, a light source circuit board, 3, a concave mirror, 4, a light passing hole, 5, a part to be measured, 6, a band-pass filter, 7, a photoelectric sensor, 8, an annular belt, 91, a wide-angle lens, 92, a receiving end convex lens, 93, an imaging channel, 94, a light splitting filter, 95, a CMOS photoelectric sensor and 96 camera plates
Detailed Description
The invention is further described with reference to the following detailed description in order to make the technical means, the inventive features, the achieved objects and the effects of the invention easy to understand. The present invention is not limited to the following examples.
It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the invention to the extent that it can be practiced, since modifications, changes in the proportions, or otherwise, used in the practice of the invention, are not intended to be critical to the essential characteristics of the invention, but are intended to fall within the spirit and scope of the invention.
One embodiment of the present invention, as shown in fig. 1 to 5, is a multiband diffuse reflection near infrared light emitting photographing device, which includes a transmitting module and a receiving module.
As shown in fig. 1 to 3, the emission module includes four light source elements 1, a light source circuit board 2 and a concave mirror 3, in this embodiment, the light source elements are LED lamps, and the four light source elements 1 are symmetrically arranged on the light source circuit board 2 having a square shape and respectively emit near infrared light with respective wavelengths in sequence. The light source element 1 emits light of only one wavelength, the wavelengths of the light emitted from the light source elements 1 may be the same or different, and only the light source element 1 emitting light of the same wavelength is turned on at the same time. In the present embodiment, one light source element 1 emits light with only one wavelength, and the wavelengths of the light emitted by the four light source elements 1 are different, that is, the four light source elements 1 sequentially emit light with four different wavelengths, respectively.
A light source element 1 is provided with a concave mirror 3 to converge light emitted from the light source element 1, respectively, the light source element 1 being mounted at a concave surface of the concave mirror 3; the concave mirror 3 uniformly covers the near infrared light irradiation area of the light source element 1 on 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 uniformly converged on the designated area of the part to be measured 5, and the part to be measured 5 in this embodiment is the wrist skin of the user.
As shown in fig. 4 and 5, the light-transmitting hole 4 (the middle dark gray part in fig. 4 and 5) is provided at the center of the light-source circuit board 2, a circular ring belt 8 with central symmetry is provided at the periphery of the light-transmitting hole 4, four light-source elements 1 and four concave mirrors 3 are mounted thereon, and most of electronic circuits are arranged at the outer part of the ring belt 8 of the light-source circuit board 2.
As shown in fig. 1 and 2, the receiving module includes a bandpass filter 6 and a photosensor 7. The bandpass filter 6 is disposed between the light-passing hole 4 and the photosensor 7, preferably at the light-passing hole 4 to save the space of the apparatus, and the bandpass filter 6 allows neither light having a wavelength smaller than the minimum wavelength emitted from the light source element 1 nor light having a wavelength larger than the maximum wavelength emitted from the light source element 1 to pass. The photoelectric sensor 7 is a photoelectric sensor for distortion-free macro shooting, and in the present embodiment, the photoelectric sensor is an organic photoelectric sensor (OPD), and the organic photoelectric sensor has the characteristics of mechanical flexibility, easy processing, adjustable photoelectric characteristics, and excellent light sensing performance. Because the organic photoelectric sensor has low requirement on the imaging object distance, a lens is not required to be adopted for focusing when the organic photoelectric sensor is used for micro-distance imaging.
It should be noted that, in fig. 1 to 3, two light source elements 1 and two corresponding concave mirrors 3 located before and after the light-passing hole 4 are omitted for showing the position of the light-passing hole 4 (at the dashed line frame), and the black rectangle in fig. 1 and 2 is the bandpass filter 6 located at the light-passing hole 4.
As shown in fig. 2 (the solid line and the dotted line light paths respectively represent the paths of the light emitted by the left and right LED lamp beads), the paths through which the light signals emitted by the light source element 1 of the emitting module pass are sequentially a concave mirror 3, a part to be measured 5, a light passing hole 4, a band-pass filter 6 and a photoelectric sensor 7; the light signal passing through the band-pass filter 6 is near infrared light diffusely reflected by the portion 5 to be measured.
In some embodiments, as shown in fig. 8, the receiving module further includes a spectral filter 94, a camera plate 96, and a receiving end optical lens set; 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 plate 96, and a spectral filter 94 is arranged in the imaging channel; the camera 96 board is a circuit board, is provided with a photoelectric sensor, is associated with the transmitting module, and can be externally connected with a processor to receive instructions of the processor to complete shooting, data acquisition, data set analysis, transmission and other works; correspondingly, the photosensors are CMOS photosensors 95 (e.g., indium gallium arsenide detectors); the light emitted from the light source element 1 of the emission module passes through a concave mirror 3, a portion to be measured 5, a band-pass filter 6, a wide-angle lens 91, a receiving-end convex lens 92, a spectral filter 94, and a CMOS photosensor 95 in this order. In use, the emission module and the photoelectric sensor are activated via the camera board 96.
The invention can be embedded into portable equipment such as a watch or a bracelet and the like, and is used for measuring blood glucose indexes, anemia indexes, uric acid indexes and the like in a short distance. In the multiband diffuse reflection near infrared light-emitting shooting device provided by the invention, the wave band of light emitted by the light source element 1 is 750-2250 nm, and the band-pass filter 6 allows light in any wave band interval between the wave bands of 750-2250 nm to pass through; the photoelectric sensor 7 is an organic photoelectric sensor and can shoot near infrared images of any band interval between the 750-2250 nm bands according to application requirements.
The purpose of the measurement in this embodiment is to obtain the blood glucose level of the user, so that the light emitted from the light source element 1 has a wavelength band of 750 to 1000nm, and the bandpass filter 6 allows the passage of the wavelength band of 750 to 1000 nm; the photoelectric sensor 7 is an organic photoelectric sensor and can shoot near infrared images between the wave bands of 750-1000 nm according to application requirements.
In some embodiments, when it is required to measure the anemia index of the user, the band of light emitted by the light source element 1 is between 760 and 1100nm, and the band-pass filter 6 allows the passage of the light between 760 and 1100 nm; the photoelectric sensor 7 is an organic photoelectric sensor and can shoot near infrared images between 760-1100 nm wave bands according to application requirements.
In some embodiments, when it is desired to measure the uric acid level of the user, the light source element 1 emits light with a wavelength band of 1600nm, and the band-pass filter 6 allows light with a wavelength of 1600nm to pass; the photosensor 7 is an organic photosensor and can take near infrared images of 1600nm wavelength according to application requirements.
When the multiband diffuse reflection near infrared light emitting photographing device of the present embodiment is used for data collection, the collection steps are as shown in fig. 6, after the to-be-measured part is placed, the emission module and the photoelectric sensor 7 are started, after the emission module is started, the light source elements 1 are simultaneously turned on, the plurality of light source elements 1 sequentially emit a plurality of groups of near infrared light with different wavelengths, the photoelectric sensor 7 cooperates with the light source elements 1 to sequentially emit the plurality of near infrared light with different wavelengths, and near infrared images of the to-be-measured part after the near infrared light with the wavelength is diffusely reflected by the to-be-measured part 5 are sequentially collected at each wavelength. In this embodiment, the first LED lamp is turned on to emit near infrared light of the first wavelength, and at the same time, the photosensor 7 starts to collect 3 frames of near infrared images of the wrist portion after the near infrared light of the first wavelength is diffusely reflected by the wrist skin, and then screens out the optimal 1 frame. After the screening is finished, the first LED lamp is turned off, the second LED lamp is turned on, the second LED lamp emits near infrared light with a second wavelength, and at the same time, the photoelectric sensor 7 starts to collect 3 frames of near infrared images of the wrist after the near infrared light with the second wavelength is diffusely reflected by the wrist skin, and the optimal 1 frame is screened. After the screening is finished, the second LED lamp is turned off, the third LED lamp is turned on, the third LED lamp emits near infrared light with a third wavelength, and at the same time, the photoelectric sensor 7 starts to collect 3 frames of near infrared images of the wrist part after the near infrared light with the third wavelength is diffusely reflected by the wrist skin, and the optimal 1 frame is screened. After the screening is finished, the third LED lamp is turned off, the fourth LED lamp is turned on, the fourth LED lamp emits near infrared light with a fourth wavelength, and at the same time, the photoelectric sensor 7 starts to collect 3 frames of near infrared images of the wrist part after the near infrared light with the fourth wavelength is diffusely reflected by the wrist skin, and the optimal 1 frame is screened.
In some embodiments, one light source element 1 emits light with only one wavelength, and a plurality of light source elements 1 emit light with the same wavelength at the same time, for example, three LED lamps are simultaneously turned on to emit near infrared light with a first wavelength, three other LED lamps are simultaneously turned on to emit near infrared light with a second wavelength, three other LED lamps are simultaneously turned on to emit near infrared light with a third wavelength, and three other LED lamps are simultaneously turned on to emit near infrared light with a fourth wavelength.
And then, carrying out data preprocessing on the screened 4 frames of photos serving as original data by an external processor, and applying the processed wrist near infrared image serving as a data set to a subsequent detection algorithm to finally obtain a required detection value.
In some embodiments, when the anemia index of the user needs to be measured, only the uric acid index under one wavelength needs to be obtained, so that the light source element 1 emitting near infrared light with the same wavelength only needs to be started when the data acquisition is performed, and at the same time, the photoelectric sensor 7 starts to acquire 3 frames of near infrared images of the wrist after the near infrared light with the wavelength is diffusely reflected by the wrist skin, and the optimal 1 frame is screened. And then, carrying out data preprocessing on the screened 1 frame of photo serving as original data by an external processor, and applying the processed wrist near infrared image serving as a data set to a subsequent detection algorithm to finally obtain a required detection value.
In another embodiment of the invention, which is similar in structure to fig. 1 to 5, there is only one light source element 1, which can sequentially emit light of several different wavelengths, and only one wavelength at a time. The emitting module of the present embodiment includes a light source element 1, a light source circuit board 2 and a concave mirror 3, in this embodiment, the light source element 1 is also an LED lamp, the light source element 1 is located on the light source circuit board and is provided with the concave mirror 3 to collect the light emitted by the light source element 1, and the light source element 1 is located at the concave center of the concave mirror 3; the concave mirror 3 uniformly covers the near infrared light irradiation area of the light source element 1 on 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 uniformly converged on the designated area of the part to be measured 5, and the part to be measured in this embodiment is the wrist skin of the user.
In some embodiments, the number of light source elements 1 is plural, each light source element 1 can emit light with several different wavelengths, and only one wavelength is emitted at a time; at the same time, the wavelengths of the lights emitted by the light source elements 1 are the same, for example, four LED lamps are simultaneously turned on to emit near infrared light of a first wavelength, then the lights emitted by the four LED lamps are simultaneously switched from near infrared light of the first wavelength to near infrared light of a second wavelength, and so on.
In some embodiments, there is only one light source element, and the light source element is located in the center of the light source circuit board, and correspondingly, the position of the light through holes is changed, that is, a circle of light through holes is arranged around the periphery of the light source element.
Similar to the one shown in fig. 4 and 5, the light-transmitting hole 4 (the middle dark gray part in fig. 4 and 5) is provided in the center of the light-source circuit board 2, and a circular ring belt 8 with central symmetry is provided around the light-transmitting hole 4, on which 1 light-source element 1 is mounted, and most of the electronic circuits are arranged on the outer part of the ring belt 8 of the light-source circuit board 2.
Similar to fig. 1, 2, the receiving module comprises a bandpass filter 6 and a photosensor 7. The bandpass filter 6 is disposed between the light-passing hole 4 and the photosensor 7, preferably at the light-passing hole 4 to save the space of the apparatus, and the bandpass filter 6 allows neither light having a wavelength smaller than the minimum wavelength emitted from the light source element 1 nor light having a wavelength larger than the maximum wavelength emitted from the light source element 1 to pass. The photosensor 7 is a photosensor for undistorted macro imaging, and in the present embodiment, the photosensor is an Organic Photosensor (OPD). The organic photoelectric sensor has the characteristics of mechanical flexibility, easiness in processing, adjustable photoelectric property and excellent light sensing performance. Because the organic photoelectric sensor has low requirement on the imaging object distance, a lens is not required to be adopted for focusing when the organic photoelectric sensor is used for micro-distance imaging.
The path through which the optical signal emitted by the light source element 1 of the emission module passes is sequentially a concave mirror 3, a part to be detected 5, a light passing hole 4, a band-pass filter 6 and a photoelectric sensor 7; the light signal passing through the band-pass filter 6 is near infrared light diffusely reflected by the portion 5 to be measured.
The invention can be embedded into portable equipment such as a watch or a bracelet and the like, and is used for measuring blood glucose indexes, anemia indexes, uric acid indexes and the like in a short distance. In the multiband diffuse reflection near infrared light-emitting shooting device provided by the invention, the wave band of light emitted by the light source element 1 is 750-2250 nm, and the band-pass filter 6 allows light in any wave band interval between the wave bands of 750-2250 nm to pass through; the photoelectric sensor 7 is an organic photoelectric sensor and can shoot near infrared images of any band interval between the 750-2250 nm bands according to application requirements.
The purpose of the measurement in this embodiment is to obtain the blood glucose level of the user, so that the light emitted from the light source element 1 has a wavelength band of 750 to 1000nm, and the bandpass filter 6 allows the passage of the wavelength band of 750 to 1000 nm; the photoelectric sensor 7 is an organic photoelectric sensor and can shoot near infrared images between the wave bands of 750-1000 nm according to application requirements.
In some embodiments, when it is required to measure the anemia index of the user, the band of light emitted by the light source element 1 is between 760 and 1100nm, and the band-pass filter 6 allows the passage of the light between 760 and 1100 nm; the photoelectric sensor 7 is an organic photoelectric sensor and can shoot near infrared images between 760-1100 nm wave bands according to application requirements.
In some embodiments, when it is desired to measure the uric acid level of the user, the light source element 1 emits light with a wavelength band of 1600nm, and the band-pass filter 6 allows light with a wavelength of 1600nm to pass; the photosensor 7 is an organic photosensor and can take near infrared images of 1600nm wavelength according to application requirements. At this time, only the uric acid index at one wavelength, namely, 1600nm wavelength, needs to be obtained.
When the multiband diffuse reflection near infrared light emitting photographing device of the present embodiment is used for data collection, the collection steps are as shown in fig. 7, after the to-be-measured part is placed, the emission module and the photoelectric sensor 7 are started, after the emission module is started, the light source element 1 is simultaneously started, the light source element 1 sequentially emits near infrared light with a plurality of different wavelengths, the photoelectric sensor 7 sequentially cooperates with the light source element 1 to sequentially emit the near infrared light with a plurality of different wavelengths, and near infrared images of the to-be-measured part after the near infrared light with the wavelength is diffusely reflected by the to-be-measured part 6 are sequentially collected at each wavelength. In this embodiment, the LED lamp is turned on to emit near infrared light of the first wavelength, and at the same time, the photosensor 7 starts to collect 3 frames of near infrared images of the wrist portion after the near infrared light of the first wavelength is diffusely reflected by the wrist skin, and then screens out the optimal 1 frame. After the screening is finished, the near infrared light with the first wavelength emitted by the LED lamp is switched to the near infrared light with the second wavelength, and at the same time, the photoelectric sensor 7 starts to collect 3 frames of near infrared images of the wrist part after the near infrared light with the second wavelength is diffusely reflected by the wrist skin, and the optimal 1 frame is screened. After the screening is finished, the near infrared light with the second wavelength emitted by the LED lamp is switched to the near infrared light with the third wavelength, and at the same time, the photoelectric sensor 7 starts to collect 3 frames of near infrared images of the wrist part after the near infrared light with the third wavelength is diffusely reflected by the wrist skin, and the optimal 1 frame is screened. After the screening is finished, the near infrared light with the third wavelength emitted by the LED lamp is switched to the near infrared light with the fourth wavelength, and at the same time, the photoelectric sensor 7 starts to collect 3 frames of near infrared images of the wrist part after the near infrared light with the fourth wavelength is diffusely reflected by the wrist skin, and the optimal 1 frame is screened.
And then, carrying out data preprocessing on the screened 4 frames of photos serving as original data by an external processor, and applying the processed wrist near infrared image serving as a data set to a subsequent detection algorithm to finally obtain a required detection value.
The foregoing describes in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be made in accordance with the concepts of the invention without requiring creative effort by one of ordinary skill in the art. Therefore, all technical solutions which can be obtained by logic analysis, reasoning or limited experiments based on the prior art by the person skilled in the art according to the inventive concept shall be within the scope of protection defined by the claims.

Claims (12)

1. A multi-band diffuse reflection near infrared light-emitting shooting device is characterized in that,
comprises a transmitting module and a receiving module;
the emitting module comprises at least one light source element and at least one concave mirror for converging light emitted by the light source element; the light source elements are in one-to-one correspondence with the concave mirrors; the at least one light source element is arranged on the light source circuit board and respectively emits near infrared light with respective wavelengths in sequence; the concave mirror enables the near infrared light irradiation area of the light source element to uniformly cover the part to be detected;
the receiving module comprises a band-pass filter and a photoelectric sensor;
the path through which the optical signal emitted by the light source element of the emission module passes is the concave mirror, the part to be detected, the band-pass filter and the photoelectric sensor in sequence;
the optical signal passing through the band-pass filter is near infrared light diffusely reflected by the part to be detected.
2. The multi-band diffuse reflection near infrared light-emitting photographing device according to claim 1, wherein the light source element emits light of only one wavelength, and the wavelengths of the light emitted from the light source elements may be the same or different; only the light source elements that emit light of the same wavelength are turned on at the same time.
3. The multi-band diffuse reflection near infrared light-emitting photographing device according to claim 1, wherein the light source element emits light having a plurality of different wavelengths, and emits light having only one wavelength at a time; at the same time, the wavelengths of the light emitted by the light source elements are the same.
4. The multi-band diffuse reflection near infrared light emitting camera of claim 1, wherein the photosensor is a distortion-free macro camera photosensor.
5. The near infrared light emission photographing apparatus of claim 1, wherein the band pass filter allows neither light having a wavelength smaller than a minimum wavelength emitted from the light source element nor light having a wavelength larger than a maximum wavelength emitted from the light source element to pass therethrough.
6. The multi-band diffuse reflection near infrared light-emitting shooting device according to claim 1, wherein a light passing hole is formed in the middle of the light source circuit board, and light diffusely reflected by a part to be detected passes through the light passing hole, is filtered by the band-pass filter and reaches the photoelectric sensor; the light source elements and the concave mirrors are arranged around the periphery of the light transmission hole.
7. The device of claim 6, wherein a central symmetrical ring is disposed around the light hole, and the light source element and the concave mirror are mounted on the ring.
8. The multi-band diffuse reflection near infrared light-emitting photographing device according to claim 1, wherein the light source element is an LED near infrared lamp or an LD near infrared lamp, and the emitted light has a wavelength band of 750-2250 nm.
9. The multi-band diffuse reflection near infrared light-emitting shooting device according to claim 1, wherein the band-pass filter can allow light in any band interval of 750-2250 nm bands to pass according to the practical application requirement.
10. The multi-band diffuse reflection near infrared light-emitting shooting device according to claim 1, wherein the photoelectric sensor is an organic pattern photoelectric sensor, and can shoot near infrared images of any band interval between 750nm and 2250nm according to application requirements.
11. A method for data acquisition using a multiband diffuse reflection near infrared light emitting camera according to any one of claims 1 to 10, wherein the acquisition steps are as follows:
after the part to be measured is placed, the transmitting module and the photoelectric sensor are started;
the light source elements sequentially emit near infrared light with respective wavelengths, and the wavelengths of the light emitted by the light source elements are the same at the same time;
the photoelectric sensor is matched with the time of the light source element to sequentially emit near infrared light with respective wavelengths, and continuously collects near infrared images of the to-be-detected part after diffuse reflection of near infrared light with the wavelengths for a plurality of frames of the wavelengths at each wavelength;
and screening at least one frame in the near infrared image of the part to be detected, performing data pre-processing through an external processor, and applying the processed near infrared image of the part to be detected as a data set to subsequent application.
12. The method according to claim 11, wherein after the photoelectric sensor collects the near infrared image of the part to be measured at the previous wavelength and confirms that the image can meet the collection purpose, the light source element emitting near infrared light at the previous wavelength is switched to the light source element emitting near infrared light at the next wavelength by emitting a feedback signal until the near infrared light images at all wavelengths are collected.
CN202310744145.1A 2023-06-21 2023-06-21 Multi-band diffuse reflection near infrared light-emitting shooting device and data acquisition method Pending CN116616765A (en)

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CN116616765A true CN116616765A (en) 2023-08-22

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