Biological information acquisition device and wearable equipment
By designing the dislocation structure of the imaging module in smart glasses, the problem of unclear local imaging and waste of the field of eyeballs are solved, and more efficient eyeball imaging is realized.
Patent Information
- Application Number
- CN202420624587.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-28
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-03-28
Smart Images
Figure CN222398295U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of bio-information collection, and in particular to a bio-information collection device and a wearable device. Background Art
[0002] With the development of near-eye display technology and wearable devices, smart wearable electronic products are gradually entering the consumer market. Among them, smart glasses such as AR (Augmented Reality), VR (Virtual Reality), MR (Mixed Reality), and XR (Extended Reality) have attracted the attention of different customer groups. In order to further improve the user experience of smart glasses, it is necessary to enable smart glasses to have eye tracking functions so that smart glasses can identify the user's visual direction and then determine the content that the user is paying attention to.
[0003] Figure 1 A schematic diagram of the structure of a smart glasses provided by the prior art. Figure 1 In the prior art, a camera 102 is usually arranged at the edge of the smart glasses 101, and the camera 102 is tilted toward the eyeball to facilitate photographing the eyeball. In this solution, since the tilt of the camera 102 causes a part of the eyeball to deviate from the object plane 103 of the camera, it is easy to cause the problem of unclear imaging of the part of the eyeball.
[0004] To solve this problem, Figure 2 A schematic diagram of another type of smart glasses provided by the prior art. Figure 2 , the camera 102 set at the edge of the smart glasses 101 is no longer tilted towards the eyeball. Although this setting can prevent the eyeball from deviating from the object plane 103 of the camera, since the camera 102 is located at the edge of the device, the camera 102 needs to have a larger field of view FOV so that the object plane area of the camera covers the eyeball. Figure 2 It can be understood that in this solution, most of the field of view of the camera 102 is wasted and is not used for imaging the eyeball. Utility Model Content
[0005] The purpose of this application is to provide a biological information collection device and a wearable device to address the deficiencies in the above-mentioned prior art.
[0006] To achieve the above purpose, the technical solution adopted in the embodiment of the present application is as follows:
[0007] According to one aspect of an embodiment of the present application, a biological information acquisition device is provided, comprising an imaging module and an image sensor located in an optical path, wherein the imaging module is used to guide reflected light from an eyeball to the image sensor for imaging, the object plane of the imaging module is parallel to the image plane, and the center line of the object plane of the imaging module and the center line of the image plane do not overlap.
[0008] Optionally, the imaging module includes a deflecting lens and an imaging lens group located in the optical path, and the optical axis of the light output surface of the deflecting lens is deflected by a preset angle relative to the optical axis of the light incident surface of the deflecting lens, so that the center line of the object plane and the center line of the image plane of the imaging module do not coincide, and the reflected light from the eyeball is guided to the image sensor through the deflecting lens and the imaging lens group for imaging.
[0009] Optionally, the deflecting lens has a first edge and a second edge opposite to each other, and a thickness of the deflecting lens at the first edge is greater than a thickness of the deflecting lens at the second edge.
[0010] Optionally, the light incident surface and the light emitting surface of the deflecting lens are both planes;
[0011] The light incident surface of the deflection lens is a plane, and the light emitting surface is a free-form surface;
[0012] The light incident surface of the deflection lens is a free-form surface, and the light emitting surface is a plane;
[0013] Alternatively, the light incident surface and the light emitting surface of the deflecting lens are both free-form surfaces.
[0014] Optionally, the preset angle is greater than or equal to 20°.
[0015] Optionally, the field of view angle of the imaging module is greater than or equal to 40°.
[0016] Optionally, the imaging lens group includes at least one imaging lens, and the deflection lens is located on the light incident side of the imaging lens group;
[0017] The imaging lens group includes at least one imaging lens, and the deflection lens is located at the light exit side of the imaging lens group;
[0018] Alternatively, the imaging lens group includes at least two imaging lenses, and the deflection lens is located between two adjacent imaging lenses.
[0019] Optionally, the light incident surface and / or the light exit surface of the imaging lens is an aspherical surface.
[0020] Optionally, the refractive index of the deflecting lens and / or the imaging lens is greater than or equal to 1.3 and less than or equal to 1.8.
[0021] Optionally, the biometric information acquisition device also includes a fill light unit and a filter film, the reflected light from the eyeball is at least emitted by the fill light unit, the filter film is located on the light incident side of the image sensor, the reflected light from the eyeball has a target band, and the filter film is used to transmit the light with the target band and filter out the light outside the target band.
[0022] Optionally, the fill light unit and the imaging module are symmetrically distributed with respect to the eye's horizontal line of sight.
[0023] According to another aspect of an embodiment of the present application, a wearable device is provided, comprising a wearable body and any one of the above-mentioned biological information collection devices, wherein the biological information collection device is arranged on the wearable body.
[0024] The beneficial effects of this application include:
[0025] The present application provides a bio-information acquisition device and a wearable device, including an imaging module and an image sensor located in an optical path, wherein the imaging module is used to guide the reflected light from the eyeball to the image sensor for imaging, the object plane of the imaging module is parallel to the image plane, and the center line of the object plane of the imaging module and the center line of the image plane do not overlap, forming a misalignment. By utilizing the misalignment between the center line of the object plane of the imaging module and the center line of the image plane of the imaging module, the center line of the object plane of the imaging module is shifted toward the eyeball, facilitating the object plane area of the imaging module to shift toward the eyeball to cover the eyeball. In this way, a larger portion of the field of view angle of the imaging module is used for imaging the eyeball, thereby improving the problem of most of the field of view angle being wasted. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.
[0027] Figure 1 A schematic diagram of the structure of a smart glasses provided by the prior art;
[0028] Figure 2 A schematic diagram of the structure of another type of smart glasses provided by the prior art;
[0029] Figure 3 A schematic diagram of the structure of a wearable device provided in an embodiment of the present application;
[0030] Figure 4 One of the structural schematic diagrams of a biological information collection device provided in an embodiment of the present application;
[0031] Figure 5A schematic diagram of the structure of a deflection lens provided in an embodiment of the present application;
[0032] Figure 6 A schematic diagram of the structure of another deflection lens provided in an embodiment of the present application;
[0033] Figure 7 A schematic diagram of the structure of another deflection lens provided in an embodiment of the present application;
[0034] Figure 8 A second structural diagram of a biological information collection device provided in an embodiment of the present application;
[0035] Fig. 9 A third structural diagram of a biological information collection device provided in an embodiment of the present application;
[0036] Fig.10 A fourth structural diagram of a biological information collection device provided in an embodiment of the present application;
[0037] Fig.11 A schematic diagram of the structure of another wearable device provided in an embodiment of the present application;
[0038] Fig.12 This is a fifth structural diagram of a biological information collection device provided in an embodiment of the present application.
[0039] Icons: 101-smart glasses; 102-camera; 103-object plane of the camera; 200-imaging module; 201-object plane; 202-center line of the object plane; 203-center line of the image plane; 204-image plane; 205-optical axis of the light incident surface of the deflection lens; 206-optical axis of the light exit surface of the deflection lens; 210-deflection lens; 220-imaging lens group; 221-imaging lens; 310-image sensor; 400-wearable body; 500-reflected light from the eyeball; 610-fill light unit; 620-filter film; 700-eyeball's horizontal line of sight. DETAILED DESCRIPTION
[0040] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. It should be noted that, in the absence of conflict, the various features in the embodiments of the present application can be combined with each other, and the combined embodiments are still within the scope of protection of the present application.
[0041] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.
[0042] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0043] In one aspect of an embodiment of the present application, a biometric information collection device is provided. For ease of understanding, the biometric information collection device is applied to a wearable device for demonstration. Figure 3 A structural diagram of a wearable device provided in an embodiment of the present application. Figure 3 The biological information collection device includes an imaging module 200 and an image sensor 310. The imaging module 200 and the image sensor 310 are sequentially arranged along the optical path, and the image sensor 310 can be located at the image plane of the imaging module 200. In this way, when the biological information collection device collects information from the eyeball, the reflected light 500 from the eyeball can be guided to the image sensor 310 through the imaging module 200, so that the image sensor 310 can image it. When combined with subsequent data processing, analysis and other links, the characteristic information of the eyeball can be extracted from it to facilitate tracking of the eyeball's line of sight, so as to understand the content that the user is currently paying attention to.
[0044] For ease of imaging, please continue to refer to Figure 3 , the object plane 201 of the imaging module 200 and the image plane of the imaging module 200 are parallel to each other. More importantly, the center line 202 of the object plane of the imaging module and the center line 203 of the image plane of the imaging module 200 do not overlap, so that the center line 202 of the object plane of the imaging module 200 and the center line 203 of the image plane are misaligned in the direction perpendicular to the center line 202 of the object plane, for example, Figure 3 In the embodiment, the object plane center line 202 of the imaging module 200 and the image plane center line 203 of the imaging module 200 are along Figure 3The object plane center line 202 of the imaging module 200 is defined to pass through the center of the object plane 201 of the imaging module 200 and be perpendicular to the object plane 201 of the imaging module 200, and refer to Figure 3 and Fig.11 , the object plane centerline 202 of the imaging module 200 may coincide with or approximately coincide with the horizontal line of sight 700. The image plane centerline 203 of the imaging module 200 is defined to pass through the center of the image plane 204 of the imaging module 200 and be perpendicular to the image plane 204 of the imaging module 200, wherein the image plane 204 of the imaging module 200 may be understood as the photosensitive surface of the image sensor 310.
[0045] See also Figure 3 , after the user wears the wearable device, the observation area of the wearable device (such as the area where the lens is located) is generally located directly in front of the user's eyeball. When the bio-information acquisition device is set at the edge of the wearable device, the misalignment between the object plane centerline 202 of the imaging module 200 and the image plane centerline 203 of the imaging module 200 can be used to make the object plane centerline 202 of the imaging module 200 shift toward the eyeball, so as to facilitate the object plane 201 area of the imaging module 200 to shift toward the eyeball to cover the eyeball. In this way, a larger part of the field of view FOV of the imaging module 200 is used for imaging the eyeball, improving the problem of most of the field of view being wasted.
[0046] Please continue to see Figure 3 See also Fig.11 , after the user wears the wearable device, the object plane 201 of the imaging module 200 can be perpendicular to the eyeball's horizontal line of sight 700, so that the eyeball is located on the object plane 201 of the imaging module 200 as much as possible. It can be understood that the eyeball's horizontal line of sight 700 is the line connecting the center of the pupil and the center of the eyeball (called the first line) in a normal posture, that is, the eyes are looking straight ahead at this time. Correspondingly, when the head is raised or the eyes look up, the first line is tilted obliquely upward, and when the head is lowered or the eyes look down, the first line is tilted obliquely downward.
[0047] In order to optimize the imaging quality of the eyeball, the object plane center line 202 of the imaging module 200 can be parallel to the first line and close to the first line, so that the eyeball can be closer to the center of the object plane 201 of the imaging module 200, so as to improve the imaging quality of the eyeball. Figure 3 As shown, the object plane center line 202 of the imaging module 200 coincides with the first connecting line, so that the eyeball is located at the center of the object plane 201 of the imaging module 200, and better imaging quality can be obtained.
[0048] When the object plane 201 and the image plane 204 of the imaging module 200 meet the requirement that the object plane center line 202 and the image plane center line 203 do not overlap, as shown in FIG. Figure 3As shown, the imaging module 200 includes a deflection lens 210 and an imaging lens group 220 located in the optical path. Figure 4 As shown, the imaging lens group 220 can converge the reflected light from the eyeball to facilitate imaging. The deflection lens 210 makes the object plane centerline 202 and the image plane centerline 203 of the imaging module 200 not overlap, thereby forming a misalignment. Therefore, the reflected light from the eyeball can be guided by the deflection lens 210 and the imaging lens group 220 to achieve imaging at the image sensor 310. For ease of understanding, the deflection lens 210 and the imaging lens group 220 will be introduced below in conjunction with the accompanying drawings.
[0049] For the deflection lens 210:
[0050] Please continue to see Figure 4 , the optical axis 206 of the light-outgoing surface of the deflection lens is deflected by a preset angle a relative to the optical axis 205 of the light-incoming surface of the deflection lens, so that the propagation direction of the light before and after the light is incident on the deflection lens 210 can be changed by the deflection lens 210, so that the object plane 201 and the image plane 204 of the imaging module 200 meet the requirement that the object plane center line 202 and the image plane center line 203 do not overlap. It should be understood that the optical axis 205 of the light-incoming surface of the deflection lens can be understood as the central light of the incident light beam, and the optical axis 206 of the light-outgoing surface of the deflection lens can be understood as the central light of the outgoing light beam.
[0051] In some possible implementations, the thicknesses of the two opposite ends of the deflection lens 210 are different to form an asymmetric lens, so as to realize that the optical axis 206 of the light exit surface of the deflection lens is deflected by a preset angle a relative to the optical axis 205 of the light entrance surface of the deflection lens. More specifically, the deflection lens 210 has a first edge and a second edge opposite to each other, and the thickness of the deflection lens 210 at the first edge is greater than the thickness of the deflection lens 210 at the second edge. For example, in conjunction with reference to Figures 5 to 7 The first edge of the deflecting lens 210 is located at the top, and the second edge is located at the bottom, wherein the thickness W1 of the top of the deflecting lens 210 is greater than the thickness W2 of the bottom of the deflecting lens 210.
[0052] In some possible implementations, the shape of the light entrance and exit surfaces of the deflection lens 210 can be reasonably selected as needed. Figure 5 The light incident surface and the light exit surface of the deflection lens 210 shown in FIG. are both planes. If the image quality needs to be optimized by the deflection lens 210, for example Figure 6 The light incident surface of the deflection lens 210 shown in the figure is a plane, while the light emitting surface is a free-form surface; or, the light incident surface of the deflection lens 210 is a free-form surface, while the light emitting surface is a plane; in this way, the aberration during imaging can be optimized with the help of the free-form surface. If it is necessary to further optimize the imaging quality through the deflection lens 210, such as Figure 7The light incident surface and the light emitting surface of the deflection lens 210 are both free-form surfaces, so as to have a larger adjustment range for the incident light, which helps to further reduce the aberration.
[0053] From the perspective of optimizing aberrations, when the deflection lens 210 has a certain ability to optimize aberrations (the light incident surface and / or light exit surface of the deflection lens 210 adopts a free-form surface), the number of imaging lenses 221 used in the imaging lens group 220 can be reduced.
[0054] In some possible embodiments, the preset angle a of the optical axis 206 of the light output surface of the deflection lens relative to the optical axis 205 of the light incident surface of the deflection lens is greater than or equal to 20°, so that the misalignment between the object plane center line 202 and the image plane center line 203 of the imaging module 200 in the direction perpendicular to the object plane center line 202 (in the direction of the image plane center line 203) can meet the requirements of most wearable devices that carry the biometric information collection device on the edge of the device.
[0055] For the imaging lens group 220:
[0056] The imaging lens group 220 is intended to converge the reflected light 500 from the eyeball to facilitate imaging, so the imaging lens group 220 can be set using a reasonable lens imaging solution, such as Figures 8 to 10 As shown, the imaging lens group 220 can use a convex lens to converge the reflected light 500 from the eyeball. Of course, the number of imaging lenses 221 included in the imaging lens group 220 can be reasonably set according to the imaging scheme adopted. For example, the number of imaging lenses 221 included in the imaging lens group 220 is one. If the quality of imaging is optimized, such as Figures 8 to 10 As shown, the number of imaging lenses 221 included in the imaging lens group 220 may be two or more.
[0057] In some possible implementations, the light incident surface or the light exit surface of the imaging lens 221 is an aspherical surface, so as to optimize the imaging quality. If the imaging quality needs to be further optimized, both the light incident surface and the light exit surface of the imaging lens 221 can be aspherical surfaces.
[0058] It should be understood that the relative arrangement positions of the deflecting lens 210 and the imaging lens group 220 in the optical path can be reasonably selected according to the requirements. For example, the deflecting lens 210 can be located at the light incident side or the light exit side of the imaging lens group 220. Of course, the deflecting lens 210 can also be located inside the imaging lens group 220. For easy understanding, they will be described below in conjunction with the accompanying drawings.
[0059] In some possible implementations, such as Figure 8As shown, the deflection lens 210 is located on the light incident side of the imaging lens group 220. The reflected light 500 from the eyeball is first incident on the deflection lens 210, then emitted from the deflection lens 210 and incident on the imaging lens group 220, and finally imaged on the image sensor 310. In this solution, the optical path is the shortest, which is conducive to better reducing the volume, so it can be applied to most usage scenarios, such as wearable devices.
[0060] In some possible implementations, such as Fig. 9 As shown, the deflection lens 210 is located at the light exiting side of the imaging lens group 220. The reflected light 500 from the eyeball first enters the imaging lens group 220, then exits the imaging lens group 220 and enters the deflection lens 210, and finally forms an image on the image sensor 310.
[0061] In some possible implementations, the imaging lens group 220 includes at least two imaging lenses 221, and the deflection lens 210 may be located between any two adjacent imaging lenses 221. Fig.10 As shown, the imaging lens group 220 includes two imaging lenses 221, which are respectively referred to as the first imaging lens 221 and the second imaging lens 221 for ease of understanding and description, wherein the first imaging lens 221 is located on the light incident side of the deflection lens 210, and the second imaging lens 221 is located on the light exit side of the deflection lens 210. The reflected light 500 from the eyeball first enters the first imaging lens 221, then exits to the deflection lens 210 through the first imaging lens 221, and then exits to the second imaging lens 221 through the deflection lens 210, and finally forms an image on the image sensor 310.
[0062] In some possible implementations, the refractive index n1 of the deflecting lens 210 satisfies: 1.3≤n1≤1.8.
[0063] In some possible implementations, the refractive index n2 of the imaging lens 221 satisfies: 1.3≤n2≤1.8.
[0064] In some possible implementations, the refractive index n1 of the deflecting lens 210 and the refractive index n2 of the imaging lens 221 both satisfy: 1.3≤n1≤1.8, 1.3≤n2≤1.8.
[0065] In some possible implementations, the field of view angle of the imaging module 200 is greater than or equal to 40°.
[0066] In order to reduce the interference of external ambient light on the biometric information collection device when collecting the biometric information of the eyeball, Fig.11As shown, the bio-information acquisition device further includes a fill light unit 610 and a filter film 620, and the fill light unit 610 and the filter film 620 are both arranged in the light path. And the reflected light 500 from the eyeball is emitted at least by the fill light unit 610, and the reflected light 500 from the eyeball has a target wavelength band. Correspondingly, the filter film 620 is located on the light incident side of the image sensor 310, and the filter film 620 is used to transmit the light with the target wavelength band and filter out the light outside the target wavelength band.
[0067] Reference Fig.11 and Fig.12 The light with the target wavelength band is emitted by the fill light unit 610 and reaches the eyeball, and is reflected by the eyeball to form the reflected light 500 from the eyeball. Then the reflected light 500 from the eyeball enters the imaging module 200 and is emitted from the imaging module 200 to the filter film 620. In particular, the reflected light 500 from the eyeball can smoothly pass through the filter film 620 to reach the image sensor 310.
[0068] It should be known that if Fig.12 As shown, the filter film 620 can be located at the light-emitting side of the imaging module 200, or at the light-incoming side of the imaging module 200. Of course, the filter film 620 can also be located between any lenses in the imaging module 200, for example, the filter film 620 can be located between the deflection lens 210 and the imaging lens 221, or the filter film 620 can be located between the imaging lenses 221. In addition, the filter film 620 can also be integrated inside the image sensor 310.
[0069] Optionally, the target band can be a visible light band or an infrared band. For example, when the target band is a visible light band, it can be red light, green light, blue light, etc. When the target band is an infrared band, it can further reduce the interference of external ambient light while weakening the sensitivity of the eyeball to the light emitted by the fill light unit 610. The fill light unit 610 can be an infrared light source, and correspondingly, the filter film 620 can be an infrared bandpass filter, which meets the following specifications: in the range of 840 to 860 nm, its transmittance is greater than 90%; in the range of 350 to 830 nm, its transmittance is less than 10%; in the range of 870 to 1500 nm, its transmittance is less than 10%.
[0070] In some possible implementations, in order to facilitate the light emitted by the fill light unit 610 to be smoothly received by the imaging module 200 after being reflected by the eyeball, as shown in FIG. Fig.11 As shown, the fill light unit 610 and the imaging module 200 can be symmetrically distributed about the eye's level line of sight 700 .
[0071] In another aspect of an embodiment of the present application, a wearable device is provided, including a wearable body 400 and any one of the above-mentioned biological information collection devices, wherein the biological information collection device is arranged on the wearable body 400.
[0072] By applying the bio-information acquisition device to the wearable device, a larger portion of the field of view FOV of the imaging module 200 in the bio-information acquisition device can be used for imaging the eyeball, thereby improving the problem of most of the field of view being wasted.
[0073] The wearable device in this application can be a head-mounted device such as AR (Augmented Reality), VR (Virtual Reality), MR (Mixed Reality), XR (Extended Reality), etc., and this application does not limit it.
[0074] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A biological information collection device, characterized in that: It includes an imaging module and an image sensor located in the optical path, wherein the imaging module is used to guide the reflected light from the eyeball to the image sensor for imaging, the object plane of the imaging module is parallel to the image plane, and the center line of the object plane of the imaging module and the center line of the image plane do not overlap.
2. The biological information collection device according to claim 1, characterized in that: The imaging module includes a deflecting lens and an imaging lens group located in the optical path. The optical axis of the light-emitting surface of the deflecting lens is deflected by a preset angle relative to the optical axis of the light-incident surface of the deflecting lens so that the center line of the object plane and the center line of the image plane of the imaging module do not coincide. The reflected light from the eyeball is guided to the image sensor for imaging through the deflecting lens and the imaging lens group.
3. The biological information collection device according to claim 2, characterized in that: The deflecting lens has a first edge and a second edge opposite to each other, and a thickness of the deflecting lens at the first edge is greater than a thickness of the deflecting lens at the second edge.
4. The biological information collection device according to claim 3, characterized in that: The light incident surface and the light emitting surface of the deflection lens are both planes; The light incident surface of the deflection lens is a plane, and the light emitting surface is a free-form surface; The light incident surface of the deflection lens is a free-form surface, and the light emitting surface is a plane; Alternatively, the light incident surface and the light emitting surface of the deflecting lens are both free-form surfaces.
5. The biological information collection device according to claim 2, characterized in that: The preset angle is greater than or equal to 20°.
6. The biological information collection device according to claim 1, characterized in that: The field of view angle of the imaging module is greater than or equal to 40°.
7. The biological information collection device according to any one of claims 2 to 5, characterized in that: The imaging lens group includes at least one imaging lens, and the deflection lens is located on the light incident side of the imaging lens group; The imaging lens group includes at least one imaging lens, and the deflection lens is located at the light exit side of the imaging lens group; Alternatively, the imaging lens group includes at least two imaging lenses, and the deflection lens is located between two adjacent imaging lenses.
8. The biological information collection device according to claim 7, characterized in that: The light incident surface and / or the light emitting surface of the imaging lens is an aspherical surface.
9. The biological information collection device according to claim 7, characterized in that: The refractive index of the deflecting lens and / or the imaging lens is greater than or equal to 1.3 and less than or equal to 1.
8.
10. The biological information collection device according to any one of claims 1 to 6, characterized in that: The biological information acquisition device also includes a fill light unit and a filter film. The reflected light from the eyeball is at least emitted by the fill light unit. The filter film is located on the light incident side of the image sensor. The reflected light from the eyeball has a target wavelength band. The filter film is used to transmit the light with the target wavelength band and filter out the light outside the target wavelength band.
11. The biological information collection device according to claim 10, characterized in that: The fill light unit and the imaging module are symmetrically distributed with respect to the eye's horizontal line of sight.
12. A wearable device, characterized in that: It comprises a wearable body and a biological information collection device as described in any one of claims 1 to 11, wherein the biological information collection device is arranged on the wearable body.