Blood glucose measuring device

Abstract

Disclosed is a blood glucose measurement device capable of improving blood glucose measurement accuracy by focusing rays of light for blood glucose measurement in the measurement area of an object. According to an embodiment of the present invention, the blood glucose measurement device comprises: a light source unit disposed to output a plurality of first light rays for measuring blood glucose in the measurement area of an object; an optical unit including one or more optical bodies disposed to emit a plurality of first light rays toward the measurement area of the object; and a light-receiving unit disposed to receive a plurality of second light rays output through an interaction between the plurality of first light rays and the object. The one or more optical bodies include: a plurality of lenses arranged to condense a plurality of first light rays on the first surface of one or more optical bodies facing the light source unit; a reflective surface arranged to reflect a plurality of first light rays condensed by the plurality of lenses on the second surface of one or more optical bodies; and a refractive surface arranged to refract a plurality of first light rays reflected at the reflective surface toward the measurement area of the object on the third surface of one or more optical bodies.

Description

blood glucose measuring device

[0001] The present invention relates to an apparatus for measuring blood sugar, and more specifically, to a non-invasive blood sugar measuring apparatus.

[0002] Recently, various sensors capable of measuring a user's biometric information are being incorporated into electronic devices. One example of the various sensors installed in electronic devices is an optical sensor that includes a light-emitting element and a light-receiving element. Optical sensors can be used to measure biometric information such as a user's blood glucose levels.

[0003] Methods for measuring blood glucose can be classified into invasive and non-invasive methods. Invasive methods, for example, involve drawing blood from the human body to measure the glucose content within the blood. In the case of invasive methods, since blood is collected using a lancet, it can cause pain to the user, and carrying and storing the lancet may be inconvenient.

[0004] Non-invasive methods can measure a user's blood glucose using light of a specific wavelength. Since non-invasive methods do not require a blood sampling process, they do not use lancets, allowing for relatively simple and rapid blood glucose measurement. The accuracy of blood glucose measurement using non-invasive methods depends on the position, direction, and irradiation (focus) distribution of the light directed toward the user.

[0005] The information described above may be provided as related art for the purpose of aiding understanding of the present disclosure. No claim or determination is made as to whether any of the foregoing may be applied as prior art related to the present disclosure.

[0006] One objective of the present invention is to provide a blood glucose measuring device capable of improving the accuracy of blood glucose measurement by focusing lights for blood glucose measurement into a measurement area of ​​an object.

[0007] The technical problems that the present invention aims to solve are not limited to those mentioned above, and other unmentioned technical problems will be clearly understood by those skilled in the art from the description below.

[0008] A blood glucose measuring device according to an embodiment of the present invention may include: a light source unit arranged to output a plurality of first lights for measuring blood glucose in a measurement area of ​​a subject; an optical unit comprising one or more optical bodies arranged to irradiate the plurality of first lights toward the measurement area of ​​the subject; and a light receiving unit arranged to receive a plurality of second lights output by the interaction of the plurality of first lights with the subject.

[0009] The above one or more optical bodies may include: a plurality of lenses arranged to concentrate a plurality of first lights on a first surface of the one or more optical bodies facing the light source; a reflective surface arranged to reflect a plurality of first lights concentrated by the plurality of lenses on a second surface of the one or more optical bodies; and a refractive surface arranged to refract a plurality of first lights reflected from the reflective surface toward a measurement area of ​​the object on a third surface of the one or more optical bodies.

[0010] The light source unit may include a plurality of light sources each arranged to output the first light. The plurality of lenses may be arranged to have an arrangement corresponding to the plurality of light sources.

[0011] The plurality of light sources may be arranged to surround the one or more optical bodies. The plurality of lenses may be arranged on the outer periphery surface of the one or more optical bodies.

[0012] The above reflective surface may be disposed on the inner surface of one or more optical bodies provided on the inner side of the outer perimeter surface.

[0013] The above reflective surface may include a total reflection surface that totally reflects the plurality of first lights.

[0014] The above-mentioned reflective surface may have an inclination of 30° or more and 60° or less with respect to the direction of propagation of the first light incident on the above-mentioned reflective surface.

[0015] In one embodiment of the present invention, the reflective surface may be a curved surface.

[0016] In another embodiment of the present invention, the reflective surface may be flat.

[0017] The above refractive surface may be disposed on the upper surface of the one or more optical bodies.

[0018] In one embodiment of the present invention, the refraction surface may be a curved surface that is convex toward the top.

[0019] In another embodiment of the present invention, the refraction surface may be a flat plane.

[0020] The above one or more optical bodies may include: a first optical body having a plurality of lenses that concentrate a plurality of first lights output from the light source unit and a first reflective surface that reflects the concentrated first lights; a second optical body having a second reflective surface that reflects a plurality of first lights reflected from the first reflective surface; and a third optical body having a third reflective surface that reflects a plurality of first lights reflected from the second reflective surface toward a measurement area of ​​the object.

[0021] The first optical body may include a plurality of first reflective surfaces. The plurality of first reflective surfaces may be arranged to have an offset with respect to the direction in which the first light is incident on the first reflective surfaces.

[0022] According to an embodiment of the present invention, a blood glucose measuring device can be provided that can improve the accuracy of blood glucose measurement by focusing lights for blood glucose measurement into a measurement area of ​​an object.

[0023] The effects that the present invention aims to achieve are not limited to those mentioned above, and other unmentioned effects can be clearly understood by those skilled in the art from the description below.

[0024] FIG. 1 is a plan view showing a blood glucose measuring device according to a first embodiment of the present invention.

[0025] FIG. 2 is a plan view illustrating the light propagation path of a blood glucose measuring device according to a first embodiment of the present invention.

[0026] FIG. 3 is a cross-sectional view illustrating the light propagation path of a blood glucose measuring device according to a first embodiment of the present invention.

[0027] FIGS. 4a and 4b are drawings for explaining the process of arranging an optical unit and a light source unit that constitute a blood glucose measuring device according to an embodiment of the present invention.

[0028] FIG. 5a is a perspective view showing a blood glucose measuring device according to a second embodiment of the present invention.

[0029] FIG. 5b is a plan view showing a blood glucose measuring device according to a second embodiment of the present invention.

[0030] FIG. 5c is a plan view showing a part of a blood glucose measuring device according to a second embodiment of the present invention.

[0031] FIG. 5d is a side view showing a third optical element constituting a blood glucose measuring device according to a second embodiment of the present invention.

[0032] FIG. 6a is a perspective view showing a blood glucose measuring device according to a third embodiment of the present invention.

[0033] FIG. 6b is a plan view showing a blood glucose measuring device according to a third embodiment of the present invention.

[0034] FIG. 6c is a plan view showing a part of a blood glucose measuring device according to a third embodiment of the present invention.

[0035] FIGS. 6d and FIGS. 6e are cross-sectional views illustrating the light transmission path of a blood glucose measuring device according to a third embodiment of the present invention.

[0036] FIG. 7 is a drawing showing an optical element constituting a blood glucose measuring device according to the fourth embodiment of the present invention.

[0037] Hereinafter, embodiments of the present invention are described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. The present invention may be embodied in various different forms and is not limited to the embodiments described herein. It should be noted that the drawings are schematic and not drawn to scale. Relative dimensions and proportions of parts in the drawings are exaggerated or reduced in size for clarity and convenience in the drawings, and any dimensions are merely illustrative and not limiting. The same reference numerals may be used to denote similar features for the same structure, element, or part appearing in two or more drawings.

[0038] The embodiments of the present invention specifically illustrate ideal embodiments of the present invention. As a result, various variations of the illustrations are expected. Accordingly, the embodiments are not limited to specific forms of the illustrated areas and include, for example, variations in form resulting from manufacturing. All technical and scientific terms used herein, unless otherwise defined, have the meaning generally understood by those skilled in the art to which the present invention pertains. All terms used herein are selected for the purpose of further clarifying the present invention and are not selected to limit the scope of rights according to the present invention.

[0039] Expressions used in this specification, such as "comprising," "having," and "having," should be understood as open-ended terms implying the possibility of including other embodiments, unless otherwise stated in the phrase or sentence containing such expressions. Singular expressions described in this specification may include a plural meaning unless otherwise stated, and this applies likewise to singular expressions described in the claims. Expressions such as "first," "second," etc., used in this specification are used to distinguish multiple components from one another and do not limit the order or importance of said components. In describing embodiments of the present invention, detailed descriptions of related known functions or known configurations may be omitted if it is determined that such detailed descriptions could unnecessarily obscure the essence of the present invention.

[0040] FIG. 1 is a plan view showing a blood glucose measuring device according to a first embodiment of the present invention. FIG. 2 is a plan view for explaining the light propagation path of a blood glucose measuring device according to a first embodiment of the present invention. FIG. 3 is a cross-sectional view for explaining the light propagation path of a blood glucose measuring device according to a first embodiment of the present invention. In FIG. 3, the light propagation path is indicated by an arrow in the part marked by a dotted line. Referring to FIG. 1 to FIG. 3, a blood glucose measuring device (100) according to a first embodiment of the present invention is for measuring blood glucose (blood glucose amount) of a subject (10), and may include a light source unit (200), an optical unit (300), and a light receiving unit (400).

[0041] The light source unit (200) may be arranged to output a plurality of first lights (L1) for measuring blood glucose in the measurement area (11) of the subject (10). The measurement area (11) of the subject (10) is a target area where blood glucose can be measured, and may be an area corresponding to a part of the user's body, such as a person's finger or wrist. The measurement area (11) of the subject (10) may be various body parts not exemplified.

[0042] In an embodiment of the present invention, the light source unit (200) may be arranged to surround the optical unit (300). The light source unit (200) may include a plurality of light sources. The plurality of light sources may be arranged so that light is directed toward the center of the optical body (310) constituting the optical unit (300). The plurality of light sources may be arranged on a substrate in an array form. The plurality of light sources may be arranged to output a plurality of first light (L1) for blood glucose measurement. The plurality of light sources may sequentially emit light when measuring blood glucose for a target (10). Alternatively, the plurality of light sources may emit light simultaneously.

[0043] In the embodiments of FIGS. 1 and 2, the light source unit (200) may include a plurality of array light sources (200a, 200b, 200c, 200d) arranged along the perimeter of an optical body (310) constituting the optical unit (300). When the optical body (310) has a rectangular side shape, the plurality of array light sources (200a, 200b, 200c, 200d) may be arranged to face the four sides of the optical body (310).

[0044] The arrangement of multiple light sources constituting the light source unit (200) is not limited to the illustrated structure and can be varied in various ways. For example, the light source unit (200) may include multiple light sources arranged in a circular pattern. Alternatively, the light source unit (200) may be positioned on one side of the optical body (310) or arranged in a side area of ​​some of the multiple side areas.

[0045] The light source may include, for example, a laser diode. The light source may be implemented as, for example, an edge-emitting laser (EEL) including a distributed feedback (DFB) laser diode, and / or a vertical cavity surface emitting laser (VCSEL). The beam output by the light source may have various shapes, such as a circular shape, an elliptical shape with a major axis in the vertical direction, or an elliptical shape with a major axis in the horizontal direction.

[0046] A laser diode may comprise one or more array chips (201) and one or more electrodes (N-electrode and / or P-electrode) (202). For example, an array chip (201) implemented as a distributed feedback laser diode can form light of multiple single wavelengths and has high stability and precise frequency characteristics, making it suitable for use as a light source for blood glucose measurement. The electrodes (202) and / or array chips (201) may be joined by solder (203) formed by jet soldering (203). Alternatively, the electrodes (202) and / or array chips (201) may be joined by wire bonding.

[0047] At least two of the plurality of light sources may be implemented to emit light of different wavelengths. When light of various wavelengths is irradiated onto a subject (10), the intensity and / or wavelength of the light outputs that interact (e.g., reflection, transmission, and / or scattering) with the measurement area (11) of the subject (10) may change according to the blood glucose level in the blood vessels of the subject (10). Accordingly, the blood glucose of the subject (10) may be measured based on the intensity and / or wavelength of the light outputs that interact with the measurement area (11) of the subject (10).

[0048] The accuracy of the blood glucose level measured for a subject (10) may be affected by the amount of light, energy density, position and / or direction of light irradiated to the measurement area (11) of the subject (10). Accordingly, in order to improve the accuracy of blood glucose measurement for the subject (10), it is necessary to accurately control the beam shape, direction, angle, etc. of the light irradiated to the measurement area (11) of the subject (10).

[0049] The optical unit (300) may be provided to focus, reflect, and refract light output from the light source unit (200) so that a plurality of lights output from the light source unit (200) can be intensively irradiated onto the measurement area of ​​the object. The optical unit (300) may be positioned between the light source unit (200) and the measurement area of ​​the object with respect to the direction of light propagation.

[0050] The optical part (300) may include one or more optical bodies (310). The optical body (310) may be formed of a light-transmitting material. The light-transmitting material may be, for example, a material having a light transmittance of 50% or more, preferably 80% or more, more preferably 90% or more. The optical body (310) may have a refractive index greater than 1.0. More preferably, the optical body (310) may have a refractive index greater than 1.1. The optical body (310) may be provided as a polymer layer such as silicon, epoxy, polycarbonate (PC), polymethyl methacrylate (PMMA), etc., or as glass, ceramic, etc., but is not limited to these exemplified materials.

[0051] The optical body (310) may be positioned to irradiate a plurality of first lights toward a measurement area of ​​an object. The optical body (310) may irradiate a plurality of first lights output from a light source unit (200) by focusing, reflecting, and / or refracting them toward a measurement area of ​​an object. The optical body (310) may be manufactured by a process such as imprinting, molding, or lithography.

[0052] The optical body (310) may be provided with a plurality of lenses (microlenses) (320) for collecting a plurality of first lights output from a light source unit (200), a reflective surface (330) for reflecting the plurality of first lights collected by the plurality of lenses (320) toward a refractive surface (340), and a refractive surface (340) for refracting the plurality of first lights reflected from the reflective surface (330) toward a measurement area (11) of an object (10).

[0053] A plurality of lenses (320) may be arranged to concentrate a plurality of first light (L1) on a first surface (311) of an optical body (310) facing a light source part (200). The plurality of lenses (320) may also be referred to as the first optical surface. A plurality of light sources may be arranged to surround the optical body (310). A plurality of lenses (320) may be arranged on the outer circumference surface of the optical body (310).

[0054] A plurality of lenses (320) may be arranged to have an arrangement corresponding to a plurality of light sources. An anti-reflective coating layer may be disposed on the surface of the plurality of lenses (320). The lenses (320) may be implemented, for example, as convex lenses, spherical lenses, aspherical lenses, asymmetric lenses, etc.

[0055] Multiple lenses (320) can prevent the first light (L1) output from the light source (200) from spreading out and increase the light focusing efficiency to improve the accuracy of blood glucose measurement. To obtain this function, the multiple lenses (320) may be arranged so as to be spaced apart from the light output position of the corresponding light source by a distance of about 0 μm to 200 μm.

[0056] If the lens (320) is separated from the light source by a greater distance, the light emitted from the light source may be diverged and may not be efficiently focused into the measurement area (11) of the object (10). It may be preferable for the plurality of lenses (320) to be separated from the light output position of the corresponding light source by a distance of about 100 μm or less.

[0057] Since the laser beams emitted from the multiple light sources of the light source unit (200) can have a fast axis (large divergence angle) and a slow axis (small divergence angle), the multiple lenses (320) may be formed to have different curvature profiles in the horizontal direction and / or the vertical direction.

[0058] The reflective surface (330) may be positioned to reflect a plurality of first lights (L2) focused by a plurality of lenses (320) on a second surface (312) of the optical body (310). The reflective surface (330) may also be referred to as a second optical surface. The reflective surface (330) may be positioned on an inner surface provided on an inner side of the optical body (310) rather than on an outer perimeter surface.

[0059] The reflective surface (330) may be placed on a plane at the same height as the plurality of lenses (320). In other words, the reflective surface (330) may be placed at a height that overlaps with the plurality of lenses (320) in the horizontal direction. The reflective surface (330) may function as a reflector while simultaneously providing beam shaping and beam deflection functions.

[0060] The reflective surface (330) may include a total reflection surface that totally reflects a plurality of first lights (L2). If the reflective surface (330) is formed such that the angle of incidence of the beam is greater than the critical angle of total reflection, the reflectance at the reflective surface (330) can be maintained at approximately 99% or more. Preferably, the reflective surface (330) may be arranged to have an angle of inclination (θ) of 30° or more and 60° or less with respect to the direction of propagation of the incident first light (L2).

[0061] The reflective surface (330) may be a curved surface or a flat surface. In the embodiment illustrated in FIG. 3, the reflective surface (330) is made of a curved surface. The reflective surface (330) may have a curved shape in which the angle of inclination increases from the outer circumferential surface of the optical body (310) toward the center. Accordingly, the angle of reflection can be changed according to the incident height of the first light (L2), thereby improving the irradiation (concentration) distribution of light.

[0062] The beams reflected from the reflective surface (330) are deflected upward toward the measurement area (11) of the object (10) and reach the refractive surface (340). The refractive surface (340) may also be referred to as a third optical surface. The refractive surface (340) may be positioned to refract a plurality of first lights (L3) reflected from the reflective surface (330) toward the measurement area (11) of the object (10) from the third surface (313) of the optical body (310).

[0063] The refractive surface (340) may be placed on the upper surface of the optical body (310). The refractive surface (340) may be a curved surface that is convex upward or a flat surface. An anti-reflective coating layer may be placed on the surface of the refractive surface (340). As beams are refracted at the refractive surface (340), the beam width and divergence angle are adjusted, and at the same time, the propagation direction may be changed.

[0064] The refractive surface (340) can additionally perform light refraction, beam shaping, and beam deflection functions. Through the processes of light gathering, reflection, and refraction by the aforementioned plurality of lenses (320), reflective surface (330), and refractive surface (340), the laser beam can be efficiently shaped and focused to be provided suitable for optical detection purposes such as blood glucose measurement.

[0065] In the embodiment of FIG. 3, a plurality of first light rays (L3) can be refracted toward the measurement area (11) of the object (10) at a refractive surface (340) that is convex upward. The first light rays (L4) refracted at the refractive surface (340) can be incident on the measurement area (11) of the object (10). The refractive surface (340) can function to refract the first light rays (L3) reflected from the reflective surface (330) to the size of the measurement area.

[0066] The light receiving unit (400) may be arranged to receive a plurality of second lights (L5) output when a plurality of first lights (L4) interact with the subject (10). The light receiving unit (400) may include, for example, a photodiode. The light signal received by the light receiving unit (400) may be used to measure the blood glucose of the subject. For example, the wavelength of the light signal received by the light receiving unit (400) may be detected by a wavelength detection circuit (not shown), such as a Mach-Zehnder interferometer, and the blood glucose of the subject may be measured based on the detected wavelength of the light signal. At this time, the amount of blood glucose may be measured based on the spectrum of the light signal.

[0067] In the embodiments of FIGS. 1 and 3, the light receiving unit (400) is positioned so as to overlap with the center of the optical body (310) in the vertical direction. This arrangement may be suitable for efficiently receiving the second light (L5) from the measurement area (11) of the object (10) at the light receiving unit (400). To improve the light receiving efficiency of the second light (L5), an opening (315) may be formed in the center of the optical body (310).

[0068] Instead of forming an opening in the center of the optical body (310) to improve the light reception efficiency of the second light (L5), the second light (L5) may be concentrated through the center of the optical body (310) and incident on the light receiving unit (400). Unlike what is illustrated, the light receiving unit (400) may be arranged at any location where the second light (L5) can be effectively received from the measurement area (11) of the object (10). For example, the light receiving unit (400) may be placed around the optical body (310).

[0069] For example, the blood glucose of a subject can be measured by receiving and analyzing light output by a light receiving unit (400) through the interaction of light of various wavelengths with the subject (e.g., reflection, transmission, and / or scattering, etc.). For example, the user's reference blood glucose information and the characteristics of the received light of various wavelengths corresponding to the user's reference blood glucose information can be stored in memory as a mapping table. The mapping table can be used as an indicator for blood glucose measurement.

[0070] For example, if a user's blood sugar is high, fluid or water in the vascular area may penetrate into the blood vessels, increasing light absorption at specific wavelengths, while the amplitude of light scattered or reflected from the vascular area may decrease. Accordingly, if there is a large fluctuation in response gain at a specific wavelength, it can be interpreted as fluctuations in water or fluid within the skin tissue caused by blood sugar information. The wavelength of light output from the light source can be set to a wavelength that responds sensitively to changes in blood sugar.

[0071] FIGS. 4a and 4b are drawings for explaining the process of arranging an optical unit and a light source unit constituting a blood glucose measuring device according to an embodiment of the present invention. Referring to FIG. 4a, an optical unit (300) may be arranged on a substrate (110). The optical unit (300) may be arranged by being bonded or coupled to the substrate (110).

[0072] For example, the bottom surface of the optical body (310) may be bonded onto the substrate (110) by means of a photosensitive material capable of photocuring and / or heat curing, or the optical body (310) may be placed on the substrate (110) using a socket-type coupling structure (e.g., a structure for coupling / uncoupling by inserting or removing a locking device) or a detachable plug-in structure capable of coupling / uncoupling. However, the method of placing the optical body (310) is not limited to the methods listed.

[0073] The optical body (310) may include a body portion (310a) and a protrusion (310b) formed protruding from the lower surface of the body portion (310a). The protrusion (310b) may be arranged to protrude in a ring shape from the lower part of the body portion (310a), or may be arranged to protrude spaced apart along the circumferential direction from the lower part of the body portion (310a). A plurality of lenses (320) may be arranged on the outer surface of the protrusion (310b), and a reflective surface (330) may be arranged on the inner surface of the protrusion (310b).

[0074] A plurality of lenses (320) may be positioned at a predetermined height from the bottom surface of the protrusion (310b). For example, a plurality of lenses (320) may be positioned in the optical body (310) such that the vertical distance between the plurality of lenses (320) and the bottom surface (314) of the protrusion (310b) is equal to the vertical distance between the upper surface of the substrate (110) and the light output portion of the laser diode (220) of the light source unit (200).

[0075] As illustrated in FIG. 4b, as the laser diode (220) and a plurality of lenses (320) are positioned at the same height, light output from the laser diode (220) can be focused by the lenses (320) and incident on the reflective surface (330). Accordingly, as parallel light or light having a reduced diffusion angle is reflected from the reflective surface (330), light having a beam shape suitable for blood glucose measurement can be provided to the measurement area of ​​the object.

[0076] A mount (210) may be placed on a substrate (110) so that the laser diode (220) and the lens (320) are positioned at the same height. The laser diode (220) may be placed on the mount (210). The upper and lower thickness of the mount (210) may be designed so that the laser diode (220) is positioned at the same height as the lens (320) when the laser diode (220) is placed on the mount (210).

[0077] In the case where the laser diode (220) is a side light-emitting diode, the light output portion of the laser diode (220) may be positioned to protrude in a direction toward the optical body (310) from the side of the mount (210) facing the optical body (310) in order to improve the light transmission efficiency. In addition, for example, in the case of a semiconductor laser with an n-type substrate, if the laser diode (220) is p-down bonded so that the light-emitting surface is close to the mount, the heat generated in the active layer is easily released to the mount, which is advantageous for heat dissipation, and the position of the exact light-emitting surface can be known, which is advantageous for positioning it at the same height as the lens (320).

[0078] According to the blood glucose measuring device of the embodiment of the present invention as described above, light can be focused at a position and direction suitable for blood glucose measurement into a measurement area of ​​a target. In addition, according to the embodiment of the present invention, light can be transmitted to a measurement area of ​​a target to have a beam shape and beam output distribution suitable for blood glucose measurement, thereby improving the accuracy of blood glucose measurement.

[0079] FIG. 5a is a perspective view showing a blood glucose measuring device according to a second embodiment of the present invention. FIG. 5b is a plan view showing a blood glucose measuring device according to a second embodiment of the present invention. FIG. 5c is a plan view showing a part of a blood glucose measuring device according to a second embodiment of the present invention. FIG. 5d is a side view showing a third optical body constituting a blood glucose measuring device according to a second embodiment of the present invention.

[0080] Referring to FIGS. 5a through 5d, the blood glucose measuring device according to the second embodiment of the present invention differs from the first embodiment described above in that the optical unit (500) is configured to include a plurality of optical bodies (510, 530, 540). The blood glucose measuring device according to the second embodiment of the present invention may include a first optical body (510), a second optical body (530), and a third optical body (540). In FIGS. 5a through 5d, the illustration of the light receiving unit is omitted. In describing the blood glucose measuring device according to the second embodiment of the present invention, redundant descriptions of components identical or corresponding to those of the first embodiment described above may be omitted.

[0081] The light source unit (230) may be positioned to output a plurality of first lights for blood glucose measurement toward the first optical body (510). The light source unit (230) may be positioned to surround the optical unit (500). The light source unit (230) may include a plurality of light sources. The plurality of light sources may be arranged on a substrate in an array form. The light source unit (230) may include a plurality of array light sources (230a, 230b) arranged along the perimeter of the optical unit (500).

[0082] The arrangement of multiple light sources constituting the light source unit (230) is not limited to the illustrated structure and can be varied in various ways. For example, the light source unit (230) may include multiple light sources arranged in a circular pattern. Alternatively, the light source unit (230) may be positioned on one side of the optical unit (500) or arranged in a side area of ​​some of the multiple side areas.

[0083] The optical unit (500) may be provided to focus, reflect, and refract light output from the light source unit (230) so that a plurality of lights output from the light source unit (230) can be intensively irradiated onto the measurement area of ​​the object. The optical unit (500) may be positioned between the light source unit (230) and the measurement area of ​​the object with respect to the direction of light propagation.

[0084] In the embodiments of FIGS. 5a to 5d, the optical unit (500) may include a plurality of sub-optical units (500a, 500b, 500c, 500d) arranged in a shape corresponding to a plurality of light sources. For example, when the light source unit (230) is arranged along a rectangular shape, the plurality of sub-optical units (500a, 500b, 500c, 500d) may be arranged along the rectangular shape to face the light source unit (230). The arrangement of the light source unit (230) and the optical unit (500) is not limited to the illustrated form and can be changed in various ways.

[0085] The first optical body (510), the second optical body (530), and / or the third optical body (540) may be fixed and assembled, for example, by an adhesive. The assembled sub-optical parts (500a, 500b, 500c, 500d) may be fixed and positioned on a substrate and / or structure, etc. after being aligned with the light source of the light source part (230).

[0086] A plurality of first lights output from a light source unit (230) can be incident on a first optical body (510). The first optical body (510) can collect and reflect a plurality of first lights output from the light source unit (230) and irradiate them to a second optical body (530). The first optical body (510) may be equipped with a plurality of lenses (520) that collect a plurality of first lights output from a light source unit (200), and a first reflective surface (511a, 512a, …519a) that reflects the collected first lights (L11) toward the second optical body (530).

[0087] The first optical body (510) may have a refractive index greater than 1.0. More preferably, the first optical body (510) may have a refractive index greater than 1.1. The first optical body (510) may be provided as a polymer layer such as, for example, silicon, epoxy, polycarbonate (PC), polymethyl methacrylate (PMMA), glass, ceramic, etc., but is not limited to these exemplified materials. The first optical body (510) may be manufactured by a process such as imprinting, molding, or lithography.

[0088] A plurality of light sources of the light source unit (230) may be arranged to face the first optical body (510). A plurality of lenses (520) may be arranged to concentrate a plurality of first lights on the surface of the first optical body (510) facing the light source unit (230). A plurality of lenses (520) may be arranged on the outer circumferential surface of the first optical body (510). A plurality of lenses (520) may be arranged to have an arrangement corresponding to a plurality of light sources.

[0089] A plurality of lenses (520) can prevent the first light output from the light source unit (200) from emitting and increase the light focusing efficiency to improve the accuracy of blood glucose measurement. To obtain this function, the plurality of lenses (520) may be arranged so as to be spaced apart from the light output position of the corresponding light source by a distance of about 0 μm to 200 μm.

[0090] If the lens (520) is separated from the light source by a greater distance, the light emitted from the light source may be diverged, and the light may not be efficiently focused into the measurement area of ​​the object. It may be preferable for the plurality of lenses (520) to be separated from the light output position of the corresponding light source by a distance of about 100 μm or less.

[0091] The first optical body (510) may include a plurality of first reflective surfaces (511a, 512a, …519a). The first reflective surfaces (511a, 512a, …519a) may be arranged to reflect a plurality of first lights (L11) collected by a plurality of lenses (520) on the surface of the first optical body (510). The first reflective surfaces (511a, 512a, …519a) may be arranged on the inner surface of the first optical body (510). The inner surface of the first optical body (510) may be provided on the inner side of the optical part (500). The inner surface of the first optical body (510) may be arranged further away from the light source part (230) than the outer perimeter surface of the first optical body (510).

[0092] The first reflective surfaces (511a, 512a, …519a) may be total reflection surfaces. The first reflective surfaces (511a, 512a, …519a) may be positioned at an angle such that the first light (L11) concentrated by a plurality of lenses (520) is totally reflected. The first reflective surfaces (511a, 512a, …519a) may be positioned at an angle of about 30° to 60° with respect to the direction in which the first light output from the light source unit (230) is incident. Preferably, the first reflective surfaces (511a, 512a, …519a) may be positioned at an angle of about 45° with respect to the incident light.

[0093] A plurality of first reflective surfaces (511a, 512a, …519a) may be arranged to have an offset based on the incident direction of the first light output from the light source unit (230). For example, when the first light output from the light source unit (230) is incident on the first optical body (510) in a first direction (X), the plurality of first reflective surfaces (511a, 512a, …519a) may be arranged to have an offset based on the first direction (X) in which the first light is incident on the first reflective surfaces (511a, 512a, …519a).

[0094] The first optical body (510) may include a first optical structure (510a) comprising a plurality of first sub-optical bodies (511, 512, 513, 514) arranged to correspond to the first light sources of the first array light source (230a), and a second optical structure (510b) comprising a plurality of second sub-optical bodies (515, 516, 517, 518, 519) arranged to correspond to the second light sources of the second array light source (230b). The first optical body (510) may be manufactured by joining a plurality of first sub-optical bodies (511, 512, 513, 514) and / or a plurality of second sub-optical bodies (515, 516, 517, 518, 519), or may be manufactured by processing a single optical body.

[0095] A plurality of first sub-optical bodies (511, 512, 513, 514) may be arranged along a second direction (Y) perpendicular to a first direction (X). A plurality of second sub-optical bodies (515, 516, 517, 518, 519) may be arranged along the second direction (Y). A plurality of first sub-optical bodies (511, 512, 513, 514) and a plurality of second sub-optical bodies (515, 516, 517, 518, 519) may be spaced apart along the second direction (Y).

[0096] The first reflective surfaces (511a, 512a, …519a) may be disposed in the first sub-optical body (511, 512, 513, 514) and the second sub-optical body (515, 516, 517, 518, 519), respectively. A plurality of first reflective surfaces (511a, 512a, 513a, 514a) disposed in the first sub-optical body (511, 512, 513, 514) may be disposed to have an offset with respect to the incident direction of the first light output from the light source unit (230). A plurality of second reflective surfaces (515a, 516a, 517a, 518a, 519a) disposed on the second sub-optical body (515, 516, 517, 518) may be disposed to have an offset based on the incident direction of the first light output from the light source unit (230).

[0097] A plurality of first reflective surfaces (511a, 512a, …519a) can be positioned at different locations relative to the incident direction of light so that when the direction of propagation of a parallel beam output by a plurality of lenses (520) is bent by 90°, each beam does not interfere, and also so that the size of the beam can be reduced when the beam reaches the second optical body (530). For example, by making the lengths of the sub-optical bodies (511, 512, …519) different, the plurality of first reflective surfaces (511a, 512a, …519a) can be offset from each other.

[0098] The second optical body (530) may be positioned between the first optical structure (510a) and the second optical structure (510b). The second optical body (530) may have a second reflective surface (531a, 531b, 532a, 532b) that reflects a plurality of first light (L12) reflected from the first reflective surface (511a, 512a, …519a) of the first optical body (510). The second reflective surface (531a, 531b, 532a, 532b) may be positioned to overlap with the first reflective surface (511a, 512a, …519a) in the second direction (Y).

[0099] The second optical body (530) may have a refractive index greater than 1.1. The second optical body (530) may be provided with a polymer layer such as silicon, epoxy, polycarbonate (PC), polymethyl methacrylate (PMMA), glass, ceramic, etc., but is not limited to these exemplified materials.

[0100] For example, the second optical body (530) may include a first reflector (530a) and a second reflector (530b). The first reflector (530a) and the second reflector (530b) may have a roughly triangular cross-sectional shape. The first reflector (530a) may have a second reflector (531a) that reflects a plurality of first lights (L12) reflected from the first reflector surfaces (511a, 512a, 513a, 514a) of the first optical structure (510a) and causes them to be incident on the third optical body (540), and a second reflector (532a) that reflects a plurality of first lights (L12) reflected from the first reflector surfaces (515a, 516a, 517a, 518a, 519a) of the second optical structure (510b) and causes them to be incident on the third optical body (540).

[0101] The second reflector (530b) may have a second reflector (531b) that reflects a plurality of first lights (L12) reflected from the first reflector surfaces (515a, 516a, 517a, 518a, 519a) of the second optical structure (510b) and causes them to be incident on the third optical body (540), and a second reflector (532b) that reflects a plurality of first lights (L12) reflected from the first reflector surfaces (511a, 512a, 513a, 514a) of the first optical structure (510a) and causes them to be incident on the third optical body (540).

[0102] Among the second reflective surfaces (531a, 531b, 532a, 532b), the second reflective surface (531a) of the first reflector (530a) and the second reflective surface (532b) of the second reflector (530b) may be reflective surfaces that reflect a plurality of first light (L12) having a first wavelength reflected from the first reflective surfaces (511a, 512a, 513a, 514a) of the first optical structure (510a) and transmit a plurality of first light (L12) having a second wavelength reflected from the first reflective surfaces (515a, 516a, 517a, 518a, 519a) of the second optical structure (510b).

[0103] Among the second reflective surfaces (531a, 531b, 532a, 532b), the second reflective surface (531b) of the second reflector (530b) and the second reflective surface (532a) of the first reflector (530a) may be reflective surfaces that reflect a plurality of first light (L12) having a second wavelength reflected from the first reflective surfaces (515a, 516a, 517a, 518a, 519a) of the second optical structure (510b) and transmit a plurality of first light (L12) having a first wavelength reflected from the first reflective surfaces (511a, 512a, 513a, 514a) of the first optical structure (510a).

[0104] The first reflector (530a) and the second reflector (530b) can be manufactured by forming a coating layer that reflects light of a specific wavelength on the surface of an optical element that is transparent to a plurality of first lights (L12). The coating layer may be a reflective layer coated with a material such as TiO2 or SiO2, for example, but is not limited thereto. The second reflective surface (531a, 531b, 532a, 532b) may be formed in addition to the method of forming a coating layer that causes reflection, by satisfying total internal reflection conditions.

[0105] A plurality of first lights (L13) reflected from the second reflective surfaces (531a, 531b, 532a, 532b) may be incident on the third optical body (540). The third optical body (540) may be arranged at each position corresponding to the array light source, or it may be formed as a single optical component. The third optical body (540) may have a third reflective surface (541) that reflects a plurality of first lights (L13) reflected from the second reflective surfaces (531a, 531b, 532a, 532b) toward the measurement area of ​​the object.

[0106] The third reflective surface (541) may include a total reflection surface that totally reflects a plurality of first light (L13). The third reflective surface (541) may be positioned to have an angle of inclination (θ) of 30° or more and 60° or less with respect to the direction of propagation of the incident first light (L13). The third reflective surface (541) may be a curved surface or a flat surface. In the embodiment illustrated in FIG. 5d, the third reflective surface (541) is formed as a flat surface in cross-section, but the third reflective surface (541) may have a curved shape in which the angle of inclination increases in the direction from the outer circumference surface of the third optical body (540) toward the center.

[0107] The third optical body (540) may have a refractive index greater than 1.0. More preferably, the third optical body (540) may have a refractive index greater than 1.1. The third optical body (540) may be provided as a polymer layer such as, for example, silicon, epoxy, polycarbonate (PC), polymethyl methacrylate (PMMA), glass, ceramic, etc., but is not limited to these exemplified materials. The third optical body (540) may be manufactured by a process such as imprinting, molding, or lithography.

[0108] A plurality of first lights can be reflected by the third reflective surface (541) in a third direction (Z) toward the measurement area of ​​the object and incident on a refractive surface disposed on the upper surface of the third optical body (540). The upper surface of the third optical body (540) may be a refractive surface that refracts a plurality of first lights reflected from the third reflective surface (541). The refractive surface of the third optical body (540) may be arranged to refract a plurality of first lights reflected from the third reflective surface (541) toward the measurement area of ​​the object from the upper surface of the third optical body (540). The upper surface of the third optical body (540) may be a planar refractive surface or may be formed as a refractive surface with an upwardly convex curve. A plurality of first lights (L14) refracted from the refractive surface disposed on the upper surface of the third optical body (540) may be incident on the measurement area of ​​the object.

[0109] According to the blood glucose measuring device according to the second embodiment of the present invention, light can be focused to a position and direction suitable for blood glucose measurement in a measurement area of ​​a target by means of a plurality of lenses (520) and a first reflective surface (511a, 512a, …519a) of a first optical body (510), a second reflective surface (531a, 531b, 532a, 532b) of a second optical body (530), a third reflective surface (541) and a refractive surface (upper surface of the third optical body) of a third optical body (540). In addition, according to an embodiment of the present invention, light can be transmitted to a measurement area of ​​a target to have a beam shape and beam output distribution suitable for blood glucose measurement, thereby improving the accuracy of blood glucose measurement.

[0110] FIG. 6a is a perspective view showing a blood glucose measuring device according to a third embodiment of the present invention. FIG. 6b is a plan view showing a blood glucose measuring device according to a third embodiment of the present invention. FIG. 6c is a plan view showing a part of a blood glucose measuring device according to a third embodiment of the present invention. FIG. 6d and FIG. 6e are cross-sectional views for explaining the light transmission path of a blood glucose measuring device according to a third embodiment of the present invention.

[0111] Referring to FIGS. 6a through 6e, the blood glucose measuring device according to the third embodiment of the present invention differs from the previously described embodiments in that the optical unit (600) is configured to include a plurality of sub-optical units (600a, 600b, 600c, 600d). Each sub-optical unit (600a, 600b, 600c, 600d) may include an optical body (610). In FIGS. 6a through 6e, the illustration of the light source unit and the light receiving unit is omitted. The optical unit (600) may be arranged in a form corresponding to the light source array of the light source unit.

[0112] The optical unit (600) may be provided to focus, reflect, and refract light output from the light source unit so that a plurality of lights output from the light source unit can be intensively irradiated onto the measurement area of ​​the object. The optical unit (600) may be positioned between the light source unit and the measurement area of ​​the object with respect to the direction of light propagation.

[0113] The optical body (610) may have a refractive index greater than 1.0. More preferably, the optical body (610) may have a refractive index greater than 1.1. The optical body (610) may be provided with a polymer layer such as, for example, silicon, epoxy, polycarbonate (PC), polymethyl methacrylate (PMMA), glass, ceramic, etc., but is not limited to these exemplified materials.

[0114] The optical body (610) may be positioned to irradiate a plurality of first lights toward a measurement area of ​​an object. The optical body (610) may irradiate a plurality of first lights output from a light source unit by focusing, reflecting, and / or refracting them toward a measurement area of ​​an object. The optical body (610) may be manufactured by a process such as imprinting, molding, or lithography.

[0115] The optical body (610) may be provided with a plurality of lenses (620) for concentrating a plurality of first lights output from a light source, a reflective surface (630) for reflecting the plurality of first lights concentrated by the plurality of lenses (620) toward a refractive surface (640), and a refractive surface (640) for refracting the plurality of first lights reflected from the reflective surface (630) toward a measurement area of ​​an object.

[0116] A plurality of lenses (620) may be arranged to concentrate a plurality of first lights on a first surface (611) of an optical body (610) facing a light source. A plurality of lenses (620) may be arranged on the outer circumferential surface of the optical body (610). A plurality of lenses (620) may be arranged to have an arrangement corresponding to a plurality of light sources.

[0117] Multiple lenses (620) can serve to prevent the first light output from the light source from spreading out and to increase the light focusing efficiency, thereby improving the accuracy of blood glucose measurement. To obtain this function, the multiple lenses (620) may be positioned so as to be spaced apart from the light output position of the corresponding light source by a distance of approximately 0 μm to 200 μm. If the lenses (620) are spaced apart from the light source by a greater distance, the light emitted from the light source may diverge, and the light may not be efficiently focused into the measurement area of ​​the object. It may be preferable for the multiple lenses (620) to be spaced apart from the light output position of the corresponding light source by a distance of approximately 100 μm or less.

[0118] The reflective surface (630) may be positioned to reflect a plurality of first lights (L21) collected by a plurality of lenses (620) on a second surface (612) of the optical body (610). The reflective surface (630) may be positioned on an inner surface provided on the inner side of the optical body (610) rather than on the outer perimeter surface. The reflective surface (630) may include a total reflection surface that totally reflects a plurality of first lights (L21). The reflective surface (630) may be positioned to have an angle of inclination (θ) of 30° or more and 60° or less with respect to the direction of travel of the incident first light (L21).

[0119] The reflective surface (630) may be a curved surface or a flat surface. In the embodiment illustrated in FIG. 6d and FIG. 6e, the reflective surface (630) is flat, but to improve the distribution of light irradiation (concentration), the reflective surface (630) may have a curved shape in which the angle of inclination increases from the outer circumferential surface of the optical body (610) toward the center.

[0120] The refractive surface (640) may be positioned to refract a plurality of first lights (L22) reflected from the reflective surface (630) toward the measurement area of ​​the object on the third surface (613) of the optical body (310). The refractive surface (640) may be positioned on the upper surface of the optical body (610). The refractive surface (640) may be an upwardly convex curved surface or a flat surface. A plurality of first lights (L22) may be refracted toward the measurement area of ​​the object on the refractive surface (640) which is formed as an upwardly convex curved surface.

[0121] The first light (L23) refracted at the refractive surface (640) can be incident on the measurement area of ​​the object. The second light, which is output through interactions such as reflection, transmission, and diffraction in the measurement area of ​​the object, can be incident on the light receiving part. The second light can be incident on the light receiving part through the space between the inner surfaces (615) of the plurality of optical bodies (610). Alternatively, if the light receiving part is not positioned on the lower side of the center of the optical part, the shape of the optical part (600) can be designed so that light is incident on the area where the light receiving part is positioned.

[0122] According to the blood glucose measuring device of the embodiment of the present invention as described above, light can be focused at a position and direction suitable for blood glucose measurement into a measurement area of ​​a target. In addition, according to the embodiment of the present invention, light can be transmitted to a measurement area of ​​a target to have a beam shape and beam output distribution suitable for blood glucose measurement, thereby improving the accuracy of blood glucose measurement.

[0123] FIG. 7 is a diagram showing an optical body constituting a blood glucose measuring device according to a fourth embodiment of the present invention. In the fourth embodiment of the present invention, the optical unit may include a prism-shaped optical body (610a). The optical body (610a) may have one or more lenses (620a) on the side facing the light source to concentrate light emitted from the light source of the light source unit into a parallel beam (or a beam with a reduced divergence angle) of light (L31). One or more lenses (620a) may be arranged to have an arrangement corresponding to one or more light sources.

[0124] The optical body (610a) may have a plurality of reflective surfaces (630a, 630b). The reflective surfaces (630a, 630b) may be total reflection surfaces. Light (L32) totally reflected from the reflective surface (630a) provided on the first surface (e.g., an inclined lower inner surface) of the optical body (610a) may be incident on the reflective surface (630b) provided on the second surface (e.g., an inclined upper side surface) of the optical body (610a).

[0125] The light (L33) totally reflected from the reflective surface (630b) can be transmitted toward the measurement area of ​​the object, or transmitted to the refractive surface (640a) placed on the upper surface of the optical body (610a) as shown in FIG. 7, so that the light (L34) refracted from the refractive surface (640a) of a flat or curved shape can be transmitted to the measurement area of ​​the object.

[0126] According to the embodiment of FIG. 7, the position, shape, direction (angle), etc. of light can be controlled in a form suitable for blood glucose measurement by means of a lens (620a) and a plurality of reflective surfaces (630a, 630b) and / or a refractive surface (640a). By doing so, the accuracy of blood glucose measurement of a non-invasive blood glucose measuring device can be improved.

[0127] Various embodiments of the present invention, including specific structural and functional details, are exemplary. Accordingly, embodiments of the present invention are not limited to those described above and may be implemented in various other forms. Furthermore, the terms used in the present invention are intended to describe some embodiments and are not to be interpreted as limiting the embodiments. For example, singular words and the phrase "above" may be interpreted to include plural forms unless the context clearly indicates otherwise. Embodiments of the present invention may be implemented by combining components of different embodiments, provided they are not arranged with one another.

[0128] In this invention, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which such concepts belong. Furthermore, commonly used terms, such as those defined in advance, should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology.

[0129] Although the present invention has been described in relation to some embodiments, various modifications and changes may be made without departing from the scope of the invention as understood by a person skilled in the art to which the invention pertains. Furthermore, such modifications and changes should be considered to fall within the scope of the claims appended to this specification.

[0130] [Explanation of the symbol]

[0131] 10: Object

[0132] 11: Measurement area

[0133] 100: Blood glucose meter

[0134] 110: Substrate

[0135] 200: Light source

[0136] 200a, 200b, 200c, 200d: Array light source

[0137] 201: Array Chip

[0138] 202: Electrode

[0139] 210: Mount

[0140] 220: Laser diode

[0141] 230: Light source

[0142] 230a, 230b: Array light source

[0143] 300: Optical section

[0144] 310: Optical element

[0145] 310a: Body part

[0146] 310b: Protrusion

[0147] 311: First surface

[0148] 312: Second Surface

[0149] 313: The Third Surface

[0150] 315: Opening

[0151] 320: Lens (Microlens)

[0152] 330: Reflective surface

[0153] 340: Refractive surface

[0154] 400: Light receiving unit

[0155] 500: Optical section

[0156] 500a, 500b, 500c, 500d: Sub-optics

[0157] 510: First optical body

[0158] 510a: First optical structure

[0159] 510b: Second optical structure

[0160] 511, 512, … 519: Sub-optical

[0161] 511a, 512a, … 519a: First reflective surface

[0162] 520: Lens (Microlens)

[0163] 530: Second optical body

[0164] 530a: First reflector

[0165] 530b: Second reflector

[0166] 531a, 531b, 532a, 532b: Second reflective surface

[0167] 540: Third optical body

[0168] 541: Third reflective surface

[0169] 600: Optical section

[0170] 600a, 600b, 600c, 600d: Sub-optics

[0171] 610: Optical element

[0172] 611: First surface

[0173] 612: Second Surface

[0174] 613: The Third Surface

[0175] 615: Medial side

[0176] 620: Lens (Microlens)

[0177] 630: Reflective surface

[0178] 640: Refractive surface

Claims

1. A light source unit arranged to output a plurality of first lights for measuring blood glucose in a measurement area of ​​a subject; An optical unit comprising one or more optical bodies arranged to irradiate the plurality of first lights toward a measurement area of ​​the object; and It includes a light receiving unit arranged to receive a plurality of second lights output by the plurality of first lights interacting with the object, and The above one or more optical bodies are, A plurality of lenses arranged to concentrate the plurality of first lights on a first surface of the one or more optical bodies facing the light source unit; A reflective surface arranged to reflect a plurality of first lights focused by the plurality of lenses on a second surface of the one or more optical bodies; and A refractive surface arranged to refract a plurality of first lights reflected from the above-mentioned reflective surface toward a measurement area of ​​the object at a third surface of the one or more optical bodies; A blood glucose measuring device including 2. In Claim 1, The light source unit includes a plurality of light sources arranged to output the first light, each of which is, A blood glucose measuring device in which the plurality of lenses are arranged to have an arrangement corresponding to the plurality of light sources.

3. In Claim 2, The plurality of light sources are arranged to surround the one or more optical bodies, and A blood glucose measuring device in which the plurality of lenses are disposed on the outer circumferential surface of the one or more optical bodies.

4. In Claim 3, A blood glucose measuring device, wherein the reflective surface is disposed on the inner surface of one or more optical bodies provided on the inner side of the outer perimeter surface.

5. In Claim 1, A blood glucose measuring device comprising a reflective surface that reflects the plurality of first lights.

6. In Claim 1, A blood glucose measuring device, wherein the reflective surface has an inclination of 30° or more and 60° or less with respect to the direction of propagation of the first light incident on the reflective surface.

7. In Claim 1, A blood glucose measuring device in which the above-mentioned reflective surface is a curved surface.

8. In Claim 1, A blood glucose measuring device in which the above-mentioned reflective surface is flat.

9. In Claim 1, A blood glucose measuring device wherein the above refractive surface is disposed on the upper surface of one or more optical bodies.

10. In Claim 1, A blood glucose measuring device in which the above-mentioned refractive surface is a curved surface convex toward the top.

11. In Claim 1, A blood glucose measuring device in which the above-mentioned refractive surface is flat.

12. In Claim 1, The above one or more optical bodies are, A first optical body having a plurality of lenses for concentrating a plurality of first lights output from the light source unit, and a first reflective surface for reflecting the concentrated first lights; A second optical body having a second reflective surface that reflects a plurality of first lights reflected from the first reflective surface; and A third optical body comprising a third reflective surface that reflects a plurality of first lights reflected from the second reflective surface toward a measurement area of ​​the object, Blood glucose measuring device.

13. In Claim 12, The first optical body includes a plurality of first reflective surfaces, and A blood glucose measuring device in which the plurality of first reflective surfaces are arranged to have an offset with respect to the direction in which a first light is incident on the first reflective surfaces.

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