CN218497180U - Heart rate and/or blood oxygen detection device based on super lens and intelligent wearable equipment - Google Patents

Abstract

The utility model relates to an intelligence is dressed technical field, specifically, this disclosure relates to heart rate and/or blood oxygen detection device and intelligent wearing equipment based on super lens. The method specifically comprises the following steps: the transmitting module is used for transmitting the detection light to the object to be detected; a receiving module for receiving the light reflected from the object and converting it into an electrical signal; the transmitting module comprises an LED and a first super lens device, wherein the first super lens device is arranged on the light path and is arranged at the downstream of the LED so as to focus the detection light on the measured object; the receiving module comprises a detector and a second super lens device, wherein the detector is arranged on the optical path and is arranged at the downstream of the measured object so as to focus the light reflected from the measured object on the detector; the first and second superlens devices each include a substrate and a superstructure unit. The utility model discloses a first super lens unit and the super lens unit of second can reduce the space that optical element occupy when guaranteeing light transmittance and focus effect, can not produce the oppression sense to the user during the use.

Description

Heart rate and/or blood oxygen detection device based on super lens and intelligent wearable equipment

Technical Field

The utility model relates to an intelligence dress technical field, specifically, this disclosure relates to heart rate and/or blood oxygen detection device and intelligent wearing equipment based on super lens.

Background

Heart rate and blood oxygen are the most important vital signs of the human body, and each person varies with age, sex and other physiological conditions. The significance of measuring heart rate and blood oxygen is mainly reflected in three aspects. First, in terms of sports, the heart rate can represent the real information of the body of the user when the user is in motion. In the aspect of diseases, the functions of preventing diseases in time can be achieved by monitoring whether the resting heart rate is in a normal range, monitoring cardiac arrest and abnormal heart rate increase in daily activities and the like, and even whether the heart rate is abnormal can be detected by monitoring the heart rate through electrocardio. Finally, mental aspects, autonomic function assessments such as mental stress, degree of stress and relaxation, and sleep quality may be analyzed from the monitored heart rate variability.

At present, most of blood oxygen detection devices use a Fresnel lens as an optical element, but the Fresnel lens is thick and inconvenient to use. For example, when wrist-watch or the bracelet that have blood oxygen detection device were worn, the fresnel lens in the middle of the dorsal scale of wrist-watch or bracelet can form the arch, and protruding position can bring oppression sense and foreign matter sense to wearer's wrist, and experience effect is poor. In addition, because the arch leads to intelligent wearing equipment can't closely laminate, and then reduced measurement accuracy.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned defect of prior art, the utility model provides a pair of rhythm of heart and/or blood oxygen detection device and intelligent wearing equipment based on super lens has solved above-mentioned technical problem.

In order to achieve the above object, the utility model provides a following technical scheme:

according to one embodiment of the present disclosure, there is provided a superlens-based heart rate and/or blood oxygen detection apparatus comprising:

at least one emission module used for emitting detection light to the object to be measured;

at least one receiving module for receiving the light reflected from the measured object and converting it into an electrical signal;

the emission module comprises at least one LED and a first super lens device, wherein the first super lens device is arranged on the light path and is arranged at the downstream of the LED so as to focus the detection light on the measured object;

the receiving module comprises at least one detector and a second super lens device, wherein the detector is arranged on the optical path and is arranged at the downstream of the measured object so as to focus the light reflected from the measured object on the detector;

the first super lens device and the second super lens device respectively comprise a substrate and a super structure unit which is arranged on the substrate and used for adjusting incident light.

In one embodiment, the LEDs comprise at least one LED emitting light with a wavelength of 532nm and/or at least one LED emitting light with a wavelength of 660nm and at least one LED emitting light with a wavelength of 940 nm.

In one embodiment, the first superlens device and the second superlens device can have any shape.

In one embodiment, the number of receiving modules is greater than or equal to the number of transmitting modules.

In one embodiment, the number of the receiving modules and the number of the transmitting modules are both one.

In one embodiment, the detector comprises a CCD detector or a CMOS detector.

In one embodiment, the superstructure units are arranged in an array; the superstructure unit is regular hexagon or square.

In one embodiment, the superstructure unit is a regular hexagon, and each vertex and the central position of the regular hexagon are provided with at least one nanostructure; the superstructure unit is square, and each vertex and the central position of the square are provided with at least one nano structure.

In one embodiment, the nanostructure material comprises one of titanium oxide, silicon nitride, fused silica, aluminum oxide, gallium nitride, gallium phosphide, amorphous silicon, crystalline silicon, and hydrogenated amorphous silicon.

In one embodiment, the nanostructure is a polarization-dependent structure or a polarization-independent structure; the polarization dependent structure comprises nanofins or nanoellipsoids; the polarization independent structure comprises a nanocylinder or a nanocylinder.

In one embodiment, a transparent filler is disposed around the nanostructures, and the difference between the refractive index of the filler and the refractive index of the nanostructures is greater than or equal to 0.5.

In one embodiment, the substrate is one of fused silica, crown glass, flint glass, and sapphire.

According to another embodiment of the present disclosure, there is provided a smart wearable device comprising a superlens-based heart rate and/or blood oxygen detection apparatus as described above.

The beneficial effects of the utility model are that: the utility model provides a pair of rhythm of heart and/or blood oxygen detection device based on super lens, the transmission module is used for sending the detected light to measurand, accepts the module and is used for receiving from the light that measurand reflects and change it into the signal of telecommunication, wherein, the super lens unit of first super lens unit and second can reduce the shared space of optical element when guaranteeing printing opacity and focus effect, can not produce the oppression sense to the user when using, has improved the comfort level of using.

Furthermore, the utility model provides a pair of intelligence wearing equipment, after using the rhythm of the heart and/or the blood oxygen detection device based on super lens, can be so that intelligence wearing equipment's detection face levels, increased area of contact to guarantee that intelligence wearing equipment closely laminates with the measured object, improve measurement accuracy.

Drawings

The technical solution and other advantages of the present invention will become apparent from the following detailed description of the embodiments of the present invention with reference to the accompanying drawings.

FIG. 1 is a schematic diagram of a superlens-based heart rate detection device of the present invention;

FIG. 2 is a schematic structural diagram of a transmitting module of the superlens-based heart rate and/or blood oxygen detecting apparatus of the present invention;

FIG. 3 is a schematic view of the receiving module of the heart rate and/or blood oxygen detecting device based on the super lens according to the present invention;

FIG. 4 is a schematic diagram of the blood oxygen detecting device based on the super lens of the present invention;

FIG. 5 is a schematic diagram of a superstructure unit of the superlens-based heart rate and/or blood oxygen detection device of the present invention; wherein the content of the first and second substances,

FIG. 5A is a schematic diagram of a superstructure cell being a regular hexagon;

FIG. 5B is a schematic diagram of a superstructure cell being square;

FIG. 5C is a schematic of a nanopillar in a nanostructure;

FIG. 5D is a schematic diagram of a nanofin in a nanostructure;

fig. 6 is a schematic diagram of a dial plate structure of the smart watch of the present invention;

fig. 7 is a side schematic view of fig. 6.

Reference numerals:

1. an LED; 2. a detector; 3. a first superlens device; 4. a second superlens device; 5. a superlens; 6. a bottom cover;

7. a nanostructure; 71. a substrate; 72. a filling layer; 73. a nanofin; 74. a nano elliptic cylinder.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present application. The word "if," as used herein, may be interpreted as "at … …" or "at … …" or "in response to a determination," depending on the context. The features of the following examples and embodiments may be combined with each other without conflict.

Referring to fig. 1 to 7, in one aspect of the present application, an embodiment of the present application provides a superlens-based heart rate and/or blood oxygen detecting apparatus including at least one transmitting module and at least one receiving module.

As shown in fig. 1 and fig. 4, it should be noted that the emitting module is used for emitting the probe light to the measured object. Further, the emitted light may be suitable for heart rate and blood oxygen detection.

The emitting module comprises at least one LED 1 and a first super lens device 3, wherein the first super lens device 3 is arranged on the light path and at the downstream of the LED 1 so as to focus the detection light on the measured object.

It should be noted that the receiving module is used for receiving the light reflected from the measured object and converting the light into an electrical signal.

Wherein the receiving module comprises at least one detector 2 and a second superlens device 4, the detector 2 is arranged on the optical path and at the downstream of the measured object, so as to focus the reflected light from the measured object on the detector 2.

Further, the first and second superlens devices 3 and 4 each include a substrate 71 and a superstructure unit provided on the substrate 71 for adjusting incident light.

The material of the substrate 71 may be at least one of fused silica, crown glass, flint glass and sapphire.

The superstructure unit is an element manufactured based on semiconductor technology and used for adjusting incident light so as to change the emergent direction of at least part of light rays.

The first superlens device 3 and the second superlens device 4 are respectively superlenses 5 modulated in different phases, and the first superlens device 3 and the second superlens device 4 can respectively realize two functions of sending and receiving the detection light through the different phases.

As shown in fig. 2, the schematic structural diagram of the transmitting module of the heart rate detecting device in fig. 2 is the same as the schematic structural diagram of the LED transmitting module of the blood oxygen detecting device. The probe light emitted by the LED 1 is focused within the subject to be measured so as to be absorbed by hemoglobin and oxygenated hemoglobin in the blood vessels of the subject.

As shown in fig. 3, the schematic structure of the receiving module of the heart rate detecting apparatus in fig. 3 is the same as the schematic structure of the receiving module of the blood oxygen detecting apparatus. The second superlens arrangement 4 focuses the reflected light on the detector 2 so that the detector 2 processes the received optical signal to form an electrical signal.

In the present embodiment, the first superlens unit 3 focuses probe light emitted from the LED 1, the second superlens unit 4 focuses reflected light and/or transmitted light of the object to be measured, the first superlens unit 3 and the second superlens unit 4 are thinner and lighter than, for example, a fresnel lens commonly used in the heart rate and/or blood oxygen detecting apparatus in the related art, and furthermore, the total thickness of the heart rate and/or blood oxygen detecting apparatus can be significantly reduced by using the first superlens unit 3 and the second superlens unit 4.

In some of these embodiments, the first superlens device 3 and the second superlens device 4 may directly contact the surface of the object to be measured.

In some of the embodiments, the first superlens apparatus 3 and the second superlens apparatus 4 may be individually packaged or may be integrally packaged, wherein since the superlens device is manufactured by semiconductor technology, the packaging thereof may preferably adopt wafer level packaging to further improve the packaging processing efficiency, and at the same time, the size, especially the thickness, of the packaging may be further reduced, so that the heart rate and/or blood oxygen detection apparatus according to the present application is more suitable for use in a smart wearable device.

It should be noted that, in the case of the superlens apparatus being integrally packaged, one superlens 5 may be designed and divided into an area for the first superlens apparatus 3 and an area for the second superlens apparatus 4 to achieve the functions of the respective apparatuses.

In some embodiments, the emitting module comprises at least three LEDs 1, wherein a first LED emits a detection light capable of detecting a heart rate; the second LED emits detection light capable of detecting hemoglobin; the third LED emits detection light capable of detecting oxyhemoglobin.

The emitting module may further include four LEDs 1, five LEDs 1, or six LEDs 1. Based on cost and function considerations, it is preferred that the emission module comprises three LEDs 1, and the specific functions of the three LEDs 1 are as follows:

the first LED is used for emitting detection light for detecting blood in a blood vessel of a detected object, and preferably, the wavelength of the detection light emitted by the first LED is 532nm.

The second LED is used for emitting detection light for detecting hemoglobin in a blood vessel of the measured object, and preferably, the wavelength of the detection light emitted by the second LED is 660nm.

The third LED is used for emitting detection light for detecting oxyhemoglobin in the blood vessel of the measured object, and preferably, the wavelength of the detection light emitted by the third LED is 964nm.

In this embodiment, when the number of the LEDs 1 included in the emission module is more than three, at least two LEDs 1 may be set to emit the same wavelength, and the principle is not described in detail. The plurality of LEDs 1 may emit detection light with different wavelengths to the object to be measured, and it is understood that if only one or two of the heart rate, hemoglobin and oxyhemoglobin need to be detected, the number of LED lamps emitting corresponding detection light may be reduced.

In some embodiments, the number of receiving modules is equal to or greater than the number of transmitting modules.

Specifically, the number of the detectors 2 included in the receiving module may be greater than or equal to the number of the LEDs 1 included in the transmitting module, and one or more detectors 2 may be designed as required. In order to improve the efficiency and accuracy of the detection.

Wherein, the detector 2 is a CCD detector or a CMOS detector.

A CCD (Charge-coupled Device) detector, i.e. a CCD image sensor. A CMOS (Complementary Metal-Oxide-Semiconductor) detector.

Further, the detector 2 receives detection light emitted from the LED 1 to detect a heart rate. Since human blood is red and absorbs green light strongly, the LED 1 emits green light with a wavelength of 532nm. Then, as the blood vessel performs periodic pacing, the distance between the blood vessel and the detector 2 changes periodically, the LED 1 continuously emits green light, the detector 2 receives a group of periodic absorption peaks, and the heart rate curve can be obtained by processing signals to a certain extent.

The probe 2 receives the probe light emitted from the LED 1 to detect the blood oxygen saturation.

The calculation formula of the blood oxygen saturation is as follows:

wherein, SPO2 is the blood oxygen saturation, HB is the hemoglobin attached to the human erythrocyte, and HBO2 is the oxygenated hemoglobin generated by the combination of the hemoglobin and oxygen.

The normal value of the blood oxygen saturation is in the range of 90% to 100%. Hemoglobin HB absorbs red light more strongly and infrared light less strongly, while oxygenHehemoglobin HBO ₂ The absorption of red light is weak, and the absorption of infrared light is strong. The LED 1 emits red light with a wavelength of 660nm and near infrared light with a wavelength of 940nm as incident light sources, respectively, into the blood vessel of the object to be measured, and the other probe 2 receives the reflected light and calculates the blood oxygen saturation degree by the difference between the emitted and received light intensities.

As shown in fig. 5, in some embodiments, the substrate 71 and the superstructure unit included in the first and second superlens devices 3 and 4 are explained as follows.

The superstructure unit may be a regular hexagon or a square, comprising a plurality of nanostructures 7.

It should be noted that, if the superstructure units are arranged in an array, the superstructure units may be all in a square or regular hexagon, or may be arranged in a staggered manner, or may be formed in a manner that one area is a square and the other area is a regular hexagon. It will be appreciated that the actual product may have the absence of nanostructures 7 at the edges of the superlens, due to the limitations of the superlens shape, making it less than perfect hexagonal or square.

When the superstructure unit of fig. 5A is a regular hexagon, at least one nanostructure 7 is disposed at each vertex and center position of the regular hexagon.

Specifically, the superstructure unit comprises a central nanostructure 7, wherein a plurality of peripheral nanostructures 7 with the same distance are surrounded around the central nanostructure 7, and the peripheral nanostructures 7 are uniformly distributed on the circumference to form a regular hexagon, which can also be understood as the combination of regular triangles formed by a plurality of nanostructures 7.

When the superstructure unit of fig. 5B is a square, at least one nanostructure 7 is disposed at each vertex and center position of the square.

Specifically, the superstructure unit comprises a central nanostructure 7 surrounded by a plurality of peripheral nanostructures 7 spaced apart from each other by equal distances, forming a square.

It should be noted that, the phase required by the nanostructures 7 at different wavelengths may be searched for the closest phase nanostructure 7 in the nanostructure 75 database.

The nano-structure 7 may be an all-dielectric structure, and has high transmittance in the operating band, and the selectable materials include: titanium oxide, silicon nitride, fused silica, aluminum oxide, gallium nitride, gallium phosphide, amorphous silicon, crystalline silicon, hydrogenated amorphous silicon, and the like.

The nanostructures 7 are sub-wavelength artificial nanostructures.

The nano-structures 7 may be nano-pillar structures, or may be other nano-structures 7 that are axisymmetric along horizontal and vertical axes, respectively.

The following description will be given taking the nano-structure 7 as a nano-pillar structure as an example; it should be understood that when the nano-structure 7 is other structure, the nano-pillar structure may be replaced with a corresponding structure in the following embodiments.

The nanopillar structure may include one of a positive nanopillar, a negative nanopillar, a positive nanopillar structure, a negative nanopillar structure, a hollow nanopillar structure, a negative hollow nanopillar structure, a Fang Nami pillar structure, a negative square nanopillar structure, a hollow square nanopillar structure, a negative hollow square nanopillar structure, and a topological nanopillar structure.

Illustratively, the nano-pillar structure in the same super lens is one of a positive nano-pillar structure, a negative nano-pillar structure, a hollow nano-pillar structure, a negative hollow nano-pillar structure, a Fang Nami pillar structure, a negative square nano-pillar structure, a hollow square nano-pillar structure, a negative hollow square nano-pillar structure and a topological nano-pillar structure, and the processing is convenient.

The optical phase of the nano-structure 7, the height of the nano-pillar structure, the shape of the cross section, and the material of the nano-pillar structure. Wherein the cross-section of the nano-pillar structure is parallel to the substrate 71.

It should be further noted that the nanostructure 7 may be a polarization-dependent structure, such as the nanofin 73 and the nanoelliptic cylinder 74, which exert a geometric phase on the incident light; the nanostructures 7 may also be polarization independent structures, such as nanocylinders and nanocquares, which impose a propagation phase on the incident light.

As shown in fig. 5C and 5D, in the present embodiment, the operating wavelength bands of the superstructure unit are red, green, and yellow. The filling layer 72 is filled between the nanostructures 7 and 7. The filling layer 72 is used to space the two nanostructures 7.

Wherein the filling layer 72 comprises an air filling or a filling material with a refractive index different from that of the nano-structure 7, and the filling material is a transparent or semitransparent material.

The absolute value of the difference between the refractive index of the filling material and the refractive index of the nano-polarization related structure is greater than or equal to 0.5.

The filler material may be alumina.

In another aspect of the present application, a wearable part comprising a superlens based heart rate and/or blood oxygen detection apparatus is presented, the wearable part being adapted to be secured at a subject. The wearing part is provided with a heart rate and blood oxygen detection area; any one area in the heart rate and blood oxygen detection area is provided with a first super lens device 3, and any other area except the position of the first super lens device 3 is provided with a second super lens device 4.

Wherein, because the detection face of wearing the part forms based on 5 preparation of super lens, again because super lens can have the characteristics of arbitrary shape, can be with wearing the more nimble of the detection face design of part, wherein the wearing part can for example include intelligent wrist-watch, intelligent bracelet, intelligent ring etc..

Furthermore, as can be seen from the advantages of the heart rate and/or blood oxygen detecting device based on the super lens 5 according to the above embodiments, the detecting surface can be configured without protrusions, so that the seamless fit between the wearing part and the measured object is increased, and the measurement accuracy is improved and ensured.

Wearing the relatively level and smooth that the detection face of part can design in this application, no arch, consequently, can set up first super lens unit 3 and second super lens unit 4 in heart rate and blood oxygen detection area's a plurality of regional selections, and needn't just can design the central zone in heart rate and blood oxygen detection area like fresnel lens for increase measurement accuracy.

Another embodiment of the utility model provides an intelligence wearing equipment is still provided, include as above-mentioned heart rate and/or blood oxygen detection device based on super lens.

In the following, an exemplary description is given of the smart wearable device as a smart watch, and the exemplary description is not to be construed as a limitation of the present technical solution.

As shown in fig. 6 and 7, a smart watch includes a bottom cover 6, a receiving module (i.e., a probe 2), a superlens 5, and three LEDs 1.

Wherein, the embedding has three LED 1 and receiving module in the intelligent wrist-watch, is equipped with superlens 5 on the bottom 6, and furtherly, three LED 1 becomes the central zone of triangular distribution at bottom 6. In the optical path, a superlens 5 disposed downstream of the LED 1 focuses the probe light on the blood vessels in the wrist. On the light path, the super lens 5 arranged at the downstream of the receiving module focuses the reflected light and the transmitted light of the blood vessel on the receiving module, the receiving module converts the received optical signal into an electric signal, and the electric signal can be converted into image or character information through other equipment so as to be viewed by a watch wearer.

Specifically, the three LEDs 1 emit detection lights having wavelengths of 532nm, 660nm, and 964nm, respectively, to detect different information, respectively.

It will be appreciated that part of the area of the superlens 5 may fulfil the function of the first superlens means 3 and part of the area may fulfil the function of the second superlens means 4.

The superlens 5 may be implemented by disposing the nanostructures 7 of different phases on the substrate 71 to implement the division function.

In some embodiments, the rear cover of the smart watch cannot be tightly attached to the measured object due to the convex structure of the fresnel lens, and particularly, the relative position of the sensor and the wrist is different during movement, so that the monitoring result is unstable, and the difference between the result and the calibration value is large. In order to overcome the above problems, most of the existing solutions use multiple sets of sensors to improve the stability of the monitoring result, for example, if the sensors are arranged in multiple directions of the back cover of the watch, the method can improve the stability of the monitoring result, but the cost is increased by the multiple sets of sensors.

The utility model provides an intelligence wrist-watch includes a transmission module and a receiving module.

Specifically, the emission module comprises an LED 1 and a first superlens device 3; the receiving module comprises a detector 2 and a second superlens arrangement 4.

It can be understood that the detection face of the back cover of the smart watch is made of the superlens 5, so that the detection face of the back cover is flat, the smart watch can still keep the detection face tightly attached to the surface of the measured object in motion, the stability of the monitoring result is ensured, and particularly in the motion requiring the arm to swing greatly, the detection face tightly attached to the surface of the measured object can ensure the reliability of the monitoring result. Therefore, according to the utility model discloses an intelligence wrist-watch is under the condition that has only a transmission module and a receiving module, also can guarantee to measure the precision of structure.

To sum up, the detection face of lid behind the intelligence wrist-watch is made based on super lens 5, can be so that the detection face with the relative level and smooth of back lid, and then increase the back lid and survey the area of contact of object to closely laminate, guarantee measurement accuracy, in addition, still can make the person of wearing when wearing the intelligence wrist-watch, the free from foreign object feels, improve the comfort level of wearing.

Heart rate detection or blood oxygen based on super lens 5 detect the more small and exquisite frivolous of module, and intelligence wearing equipment based on this is lighter.

The intelligent watch receiving module based on the super lens 5 is larger in contact area with the wrist, and the probability that the detection result is inaccurate to appear is reduced.

The smart watch based on the super lens 5 can realize that the detection surface is level with the surface of the rear cover, so that a wearer does not feel oppression and foreign body sensation when wearing the smart watch, and the wearing comfort level is high.

The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (13)

1. A superlens based heart rate and/or blood oxygen detection device, comprising:

at least one emission module used for emitting detection light to the object to be measured;

at least one receiving module used for receiving the light reflected from the measured object and converting the light into an electric signal;

the emission module comprises at least one LED and a first super lens device, and the first super lens device is arranged on an optical path and is arranged downstream of the LED so as to focus the detection light on a measured object;

wherein the receiving module comprises at least one detector and a second superlens device, the detector is arranged on the optical path at the downstream of the measured object so as to focus the reflected light from the measured object on the detector;

wherein the first and second superlens devices each include a substrate and a superstructure unit disposed on the substrate for adjusting incident light.

2. The superlens-based heart rate and/or blood oxygen detection device of claim 1, wherein the LEDs comprise at least one LED emitting light at a wavelength of 532nm and/or at least one LED emitting light at a wavelength of 660nm and at least one LED emitting light at a wavelength of 940 nm.

3. The superlens-based heart rate and/or blood oxygen detection device of claim 1, wherein the first superlens device and the second superlens device may have any shape.

4. The superlens-based heart rate and/or blood oxygen detection device according to claim 1, wherein the number of receiving modules is greater than or equal to the number of transmitting modules.

5. The superlens-based heart rate and/or blood oxygen detecting device according to claim 1, wherein the number of the receiving modules and the transmitting modules is one.

6. The superlens-based heart rate and/or blood oxygen detection device of claim 1, wherein the detector comprises a CCD detector or a CMOS detector.

7. The superlens-based heart rate and/or blood oxygen detection device according to any one of claims 1-6, wherein the superstructure units are arranged in an array; the superstructure unit is a regular hexagon or a square.

8. The superlens-based heart rate and/or blood oxygen detection device of claim 7, wherein the superstructure unit is a regular hexagon, and at least one nanostructure is disposed at each vertex and center position of the regular hexagon; the superstructure unit is a square, and at least one nanostructure is arranged at each vertex and the center of the square.

9. The superlens-based heart rate and/or blood oxygen detection device of claim 8, wherein the nano-structured material comprises one of titanium oxide, silicon nitride, fused silica, aluminum oxide, gallium nitride, gallium phosphide, amorphous silicon, crystalline silicon, and hydrogenated amorphous silicon.

10. The superlens-based heart rate and/or blood oxygen detection device of claim 8, wherein the nanostructure is a polarization-dependent structure or a polarization-independent structure; the polarization-dependent structure comprises a nanofin or a nanoelliptic cylinder; the polarization independent structure comprises a nano-cylinder or a nano-square column.

11. The superlens-based heart rate and/or blood oxygen detection device of claim 8, wherein a transparent filler is disposed around the nanostructures, and a difference between a refractive index of the filler and a refractive index of the nanostructures is greater than or equal to 0.5.

12. The superlens-based heart rate and/or blood oxygen detection device of claim 7, wherein the substrate is one of fused silica, crown glass, flint glass, and sapphire.

13. A smart wearable device comprising the superlens-based heart rate and/or blood oxygen detection apparatus of any of claims 1-12.

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