Light guide lens, optical sensor, electronic device and information extraction system

Abstract

The utility model provides a light guide lens, an optical sensor, electronic equipment and an information extraction system, the light guide lens is provided with a light incident surface and a light emergent part, and the light emergent part comprises a first side surface and a first light emergent surface; the first light emitting surface is a convex arc surface which is gradually close to the light incident surface from the first end, far away from the light incident surface, of the first side surface; and the center of the projection of the light outlet part on the light inlet surface deviates from the projection of the first end on the light inlet surface, and is positioned in the projection of the first light outlet surface on the light inlet surface. When the light guide lens is arranged on the side where the photosensitive surface of the photosensitive element is located and light to be detected obliquely enters the light guide lens from one side of the light guide lens and falls on the first light-emitting surface, the propagation direction of most of the light can be modulated by the first light-emitting surface to be changed, and then the light falls into the photosensitive surface of the photosensitive element, namely an effective receiving area. And the detected light intensity is enhanced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of optical information detection, and in particular to a light-guiding lens, an optical sensor, an electronic device and an information extraction system. Background Art

[0002] The use of optical principles for information detection has gradually become common in modern life. For example, a pulse waveform is a physiological signal measured by a photoelectric sensor, based on which changes in heartbeat and blood flow can be understood. The optical principles involved here may include light absorption and reflection. In such optical detection equipment or optical sensors, in order to improve the efficiency of light utilization, light guide lenses are generally set to adjust parameters such as the light propagation path and penetration depth.

[0003] In the related art, there is a strong correlation between the detection effect of the optical detection equipment and the receiving area of ​​the optical receiving device. The larger the receiving area of ​​the optical receiver and the stronger the received light, the better the detection effect.

[0004] However, in order to achieve goals such as equipment miniaturization, the receiving area of ​​the optical receiving device often cannot be expanded, which makes it difficult to improve the optical detection level of the equipment. Utility Model Content

[0005] In view of this, the present disclosure provides a light-guiding lens, an optical sensor, an electronic device, and an information extraction system and method, which can improve the detection accuracy of the optical sensor for obliquely incident light.

[0006] Specifically, the following technical solutions are included:

[0007] In a first aspect, an embodiment of the present disclosure provides a light guide lens, wherein the light guide lens has a light incident surface and a light emitting portion, wherein the light emitting portion includes a first side surface and a first light emitting surface;

[0008] The first light emitting surface is a convex arc surface which starts from a first end of the first side surface away from the light incident surface and gradually approaches the light incident surface;

[0009] The center of the projection of the light emitting portion on the light incident surface deviates from the projection of the first end on the light incident surface and is located within the projection of the first light emitting surface on the light incident surface.

[0010] Optionally, the first side surface is gradually inclined toward a direction approaching a central axis of the light guide lens in a direction from the light incident surface to the first light emitting surface.

[0011] Optionally, the number of the first light emitting surfaces is at least one, and they are circumferentially distributed around the central axis of the light guide lens, and different first light emitting surfaces terminate when they extend to intersect each other.

[0012] Optionally, the first light emitting surface is a continuous arc surface surrounding the central axis of the light guiding lens.

[0013] Optionally, the light emitting portion further includes a second light emitting surface, which extends from the first end of the first side surface in a direction close to the central axis of the light guide lens and is connected to the first light emitting surface.

[0014] In a second aspect, an embodiment of the present disclosure provides an optical sensor, comprising any one of the light-guiding lenses and a photosensitive element as described above, wherein the light-emitting portion of the light-guiding lens faces a photosensitive surface of the photosensitive element.

[0015] Optionally, the optical sensor further includes a light-emitting component, the number of the light-emitting components and the number of the first light-emitting surfaces are both at least one, at least one light-emitting component is circumferentially distributed around the photosensitive element and / or the light-guiding lens, at least one first light-emitting surface is circumferentially distributed around the central axis of the light-guiding lens, and at least one light-emitting component corresponds to at least one first light-emitting surface in a one-to-one manner;

[0016] Wherein, when there are multiple first light emitting surfaces, different first light emitting surfaces stop extending when they intersect each other.

[0017] Optionally, the optical sensor further includes a light-emitting component, the number of the light-emitting components is multiple, and the multiple light-emitting components are circumferentially distributed around the photosensitive element and / or the light-guiding lens;

[0018] The first light emitting surface is a continuous arc surface surrounding the central axis of the light guide lens.

[0019] Optionally, a first step is further formed on the side surface of the light guide lens;

[0020] The optical sensor comprises a shell having a first opening, the light incident surface of the light guide lens passes through the first opening and is flush with the outer surface of the shell, and the first step abuts against the shell inside the shell.

[0021] Optionally, the light-emitting component includes a light-emitting element and a light-emitting lens, and the light-emitting lens is configured to converge and emit the light emitted by the light-emitting element.

[0022] In a third aspect, an embodiment of the present disclosure provides an electronic device, comprising any one of the light-guiding lenses described above, or any one of the optical sensors described above.

[0023] In a fourth aspect, an embodiment of the present disclosure provides an information extraction system, the system comprising a circuit module, a processing module and an optical device module;

[0024] The circuit module includes a light emitting element and a light sensing element, wherein the light emitting element is configured to emit light and the light sensing element is configured to detect light;

[0025] The optical device module includes a light-emitting lens and any one of the light-guiding lenses described above, wherein the light-emitting lens is located on the light-emitting side of the light-emitting element and is configured to converge and emit the light emitted by the light-emitting element, and the light-guiding lens is located on the light-incident side of the photosensitive element and is configured to converge and send the light to the photosensitive surface of the photosensitive element;

[0026] The processing module is configured to control the light emitting element to emit light and process the signal detected by the photosensitive element.

[0027] Optionally, the processing module includes at least one of a signal amplification circuit and a filtering circuit;

[0028] The signal amplification circuit is configured to amplify the signal detected by the photosensitive element;

[0029] The filtering circuit is configured to perform filtering and noise reduction processing on the signal detected by the photosensitive element.

[0030] Optionally, the system further includes a display element, and the display element is configured to display the information processed by the processing module.

[0031] The disclosed embodiments provide a light-guiding lens, an optical sensor, an electronic device, and an information extraction system. The light-emitting portion of the light-guiding lens has a first side surface and a first light-emitting surface. The first light-emitting surface is a convex arc surface that gradually approaches the light-entering surface from the first end of the first side surface away from the light-entering surface. The convex arc surface can effectively modulate the propagation line of light obliquely incident into the light-guiding lens. In addition, the center of the projection of the light-emitting portion on the light-entering surface deviates from the projection of the first end on the light-entering surface, and is located within the projection of the first light-emitting surface on the light-entering surface, so that the first side surface has little effect on the propagation direction of the light, and the light-guiding lens modulates the light mainly by the first light-emitting surface. In this way, when the light-guiding lens is arranged on the side where the photosensitive surface of the photosensitive element is located, when the light to be detected enters the interior of the light-guiding lens obliquely from one side of the light-guiding lens and falls on the first light-emitting surface, the propagation direction of a large part of the light will be modulated by the first light-emitting surface and change the propagation direction, and then fall into the photosensitive surface of the photosensitive element, that is, the effective receiving area, so that the intensity of the detected light is enhanced, and the optical detection capability of the optical sensor or electronic device is also improved, and further the effective information that the information extraction system can obtain is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1 A partial structural schematic diagram of an optical sensor provided in an embodiment of the present disclosure;

[0034] Figure 2 for Figure 1 a front view of the structure shown;

[0035] Figure 3 for Figure 1 The optical path principle diagram of the structure shown in the working state;

[0036] Figure 4 A schematic diagram of the optical path of another optical sensor in a working state provided by an embodiment of the present disclosure;

[0037] Figure 5 A schematic diagram of a light-guiding lens provided in an embodiment of the present disclosure;

[0038] Figure 6 A bottom view of a light guide lens and a light emitting element in an optical sensor provided by an embodiment of the present disclosure;

[0039] Figure 7 A bottom view of a light-guiding lens and a light-emitting element in another optical sensor provided by an embodiment of the present disclosure;

[0040] Figure 8 A partial cross-sectional view of an optical sensor provided by an embodiment of the present disclosure;

[0041] Fig. 9 A structural diagram of an information extraction system provided by an embodiment of the present disclosure;

[0042] Fig.10 A structural diagram of a processing module in an information extraction module provided in an embodiment of the present disclosure;

[0043] Fig.11 A logic diagram of an information extraction system provided by an embodiment of the present disclosure;

[0044] Fig.12 A logic diagram of another information extraction system provided in an embodiment of the present disclosure.

[0045] The reference numerals in the figures represent respectively:

[0046] 1-light guide lens; 11-light incident surface; 12-light emitting portion; 121-first side surface; 1211-first end; 122-second light emitting surface; 123-first light emitting surface; 13-first step;

[0047] 2-Photosensitive element;

[0048] 3-light-emitting assembly; 31-light-emitting element; 32-light-emitting lens;

[0049] 4-housing; 41-first opening;

[0050] 5- Target to be measured;

[0051] 101-circuit module;

[0052] 102-processing module; 1021-signal amplification circuit; 1022-filtering circuit; 1023-calibration circuit; 1024-data analysis circuit;

[0053] 103-optical device module;

[0054] 104-display element.

[0055] The above drawings show clear embodiments of the present disclosure, which will be described in more detail below. These drawings and text descriptions are not intended to limit the scope of the present disclosure in any way, but to illustrate the concepts of the present disclosure to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0056] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0057] The directional nouns involved in the embodiments of the present disclosure, such as "upper", "lower", "side", etc., are generally based on the relative directional relationship between the structures when the light guide lens, optical sensor or electronic device is usually arranged, and these directional nouns are used only to more clearly describe the relationship between the structures, not to describe the absolute directional. When the light guide lens, optical sensor or electronic device is placed in different postures, the directional may change, for example, "upper" and "lower" may be interchangeable.

[0058] Unless otherwise defined, all technical terms used in the embodiments of the present disclosure have the same meanings as commonly understood by those of ordinary skill in the art.

[0059] In order to make the technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0060] In a first aspect, the present disclosure provides a light-guiding lens. Figure 1-5 The light guide lens 1 has a light incident surface 11 and a light emitting portion 12, and the light emitting portion 12 includes a first side surface 121 and a first light emitting surface 123;

[0061] The first light emitting surface 123 is a convex arc surface which starts from a first end 1211 of the first side surface 121 away from the light incident surface 11 and gradually approaches the light incident surface 11;

[0062] The center of the projection of the light emitting portion 12 on the light incident surface 11 deviates from the projection of the first end 1211 on the light incident surface 11 and is located within the projection of the first light emitting surface 123 on the light incident surface 11 .

[0063] It should be noted that the aforementioned first light emitting surface starts from the first end of the first side surface away from the light incident surface, including the situation of strictly starting from the first end or approximately starting from the first end, and also includes the situation of indirectly starting from the first end through some other partial light emitting surface connected to the first end.

[0064] refer to Figure 4 As shown in the schematic diagram of the optical path principle, the first light-emitting surface can modulate the subsequent propagation direction of the light that is obliquely incident from one side of the light-guiding element to the light-incoming surface to propagate into the effective receiving area of ​​the photosensitive element 2 (subsequent embodiments will be described in detail). In practical applications, for devices such as watches, the light-emitting device and the photosensitive element are often located on the same side of the target to be measured, which causes the light entering the light-guiding lens to be obliquely incident instead of vertically incident. With the help of the first light-emitting surface of the light-guiding lens in the embodiment of the present disclosure, the probability of such light falling into the ineffective receiving area of ​​the photosensitive element can be effectively reduced.

[0065] In addition, combined Figure 3-4 With the help of the first light emitting surface, it can be ensured that the light incident from one side of the light-guiding lens can be better and more evenly modulated into the effective receiving area of ​​the photosensitive element, which is beneficial to improving the optical detection accuracy of the optical sensor.

[0066] In summary, the light-emitting portion of the light-guiding lens provided in the embodiment of the present disclosure has a first side surface and a first light-emitting surface, and the first light-emitting surface is a convex arc surface that gradually approaches the light-entering surface from the first end of the first side surface away from the light-entering surface, and the convex arc surface can effectively modulate the propagation line of the light obliquely incident into the light-guiding lens. In addition, the center of the projection of the light-emitting portion on the light-entering surface deviates from the projection of the first end on the light-entering surface, and is located within the projection of the first light-emitting surface on the light-entering surface, so that the first side surface has little effect on the propagation direction of the light, and the modulation of the light by the light-guiding lens is mainly achieved by the first light-emitting surface. In this way, when the light-guiding lens is arranged on the side where the photosensitive surface of the photosensitive element is located, when the light to be detected enters the interior of the light-guiding lens obliquely from one side of the light-guiding lens and falls on the first light-emitting surface, the propagation direction of a large part of the light will be modulated by the first light-emitting surface and change the propagation direction, and then fall into the photosensitive surface of the photosensitive element, that is, the effective receiving area, so that the intensity of the detected light is enhanced, and the optical detection capability of the optical sensor or electronic device is also improved, and further the effective information that the information extraction system can obtain is more accurate.

[0067] It should be noted that the embodiments of the present disclosure are obtained after simulating and analyzing the optical scattering characteristics of light in biological tissues (such as the human body) with the help of the mathematical model Henyey-Greenstein (HG). Since biological tissues (such as skin, muscle, brain tissue, etc.) are complex multi-layer structures, their scattering characteristics for light are usually anisotropic, that is, the intensity and direction of scattering depend on the incident direction of light. The HG model provides an effective method for calculating this anisotropic scattering, and the model can be expressed as follows:

[0068]

[0069] Where θ is the scattering angle and g is a quantity called the asymmetry parameter, which has values ​​between -1 (complete backward scattering) and +1 (complete forward scattering). When g = 0, the scattering is isotropic. HG The shape of the (θ) function is determined by the g value, which can quantitatively describe the light transmission in the scattering medium. In the present disclosure, it is presumed that g is close to 1, and relevant simulations and studies are carried out based on parts such as human arms. On this basis, the aforementioned light-guiding lens is proposed. Compared with the related art in which a large amount of light reflected or refracted from the target is leaked or ineffectively reflected, the light-guiding lens in the embodiment of the present disclosure has excellent light-guiding and convergence performance when applied to the detection of biological tissue information (such as heart rate or blood oxygen saturation, etc.), and can effectively prevent light from being leaked or ineffectively reflected.

[0070] In some embodiments, in combination Figure 1-3 The first sub-side surface 121 gradually tilts toward the central axis of the light guide lens 1 in the direction from the light incident surface 11 to the first light emitting surface 123 .

[0071] In the disclosed embodiment, with the help of the first side surface 121 of the light emitting portion, when light is incident from the edge of the light guide lens to the light incident surface and then enters the light guide lens (in the related art, this part of the light often ends up falling in the non-receiving area of ​​the photosensitive element), the propagation direction of a large part of the light will be modulated to be inclined toward the direction close to the central axis of the light guide lens, and then fall into the effective receiving area of ​​the photosensitive element, so that the intensity of the detected light is enhanced, and the optical detection capability of the optical sensor or electronic device is also improved. That is, on the basis that the light guide lens mainly modulates the light with the help of the first light emitting surface, the first side surface of the light emitting portion also modulates the light to a certain extent, thereby improving the light focusing capability of the light guide lens.

[0072] Optional, combined Figure 5-6 The number of the first light emitting surfaces 123 is at least one, and they are circumferentially distributed around the central axis of the light guide lens 1 , and different first light emitting surfaces 123 terminate when they extend to intersect each other.

[0073] Based on the above configuration, it is helpful to realize targeted modulation of the propagation direction of light incident from different directions. For example, Figure 5-6 The number of the first light emitting surfaces may be two, and the two first light emitting surfaces are symmetrically arranged. Figure 6 There are two light emitting elements 31, which are respectively located on both sides of the light guide lens 1 or the photosensitive element 2. The two first light emitting surfaces can mainly modulate the propagation direction of the light emitted by a light emitting element adjacent to the light emitting element. Optionally, the light emitting element can be an LED. It can include a red or green LED.

[0074] Optional, reference Figure 7 , the first light emitting surface 123 is a continuous arc surface surrounding the central axis of the light guide lens 1. This setting is applicable to the situation where there are multiple light-emitting elements around the light guide lens, or to the situation where the light-emitting element is a ring surrounding the light guide lens or the photosensitive element. The above setting can ensure the effective modulation of the propagation direction of light incident from any direction. This situation can actually be understood as countless first light emitting surfaces continuously extending from different directions in the direction close to the central axis of the light guide lens until converging to one point, and the convergence point can be located on the central axis of the light guide lens. Optionally, the projection of the center of the light guide lens on the photosensitive surface of the photosensitive element can be located at the center of the photosensitive element.

[0075] In some embodiments, in combination Figure 1-3 The light emitting portion 12 further includes a second light emitting surface 122 , which extends from the first end 1211 of the first side surface 121 toward the direction close to the central axis of the light guide lens 1 and is connected to the first light emitting surface 123 .

[0076] Combination Figure 3 It can be seen that the second light-emitting surface 122 has a good modulation effect on the propagation direction of the light incident along the edge of the light-entering surface of the light-guiding lens. After being modulated by the second sub-light-emitting surface, such light can be modulated to propagate into the effective detection area of ​​the photosensitive element 2, thereby effectively improving the detection efficiency of the optical sensor.

[0077] In summary, the light-guiding lens provided in the embodiments of the present disclosure can effectively modulate the propagation direction of the incident light, reduce the probability of the light falling into the ineffective detection area of ​​the photosensitive element, and increase the light intensity received by the photosensitive element, thereby helping to improve the detection efficiency of the optical sensor.

[0078] In a second aspect, the present disclosure provides an optical sensor. Figure 1-3 The optical sensor includes any of the aforementioned light guide lenses 1 and a photosensitive element 2 , wherein the light emitting portion 12 of the light guide lens 1 faces the photosensitive surface of the photosensitive element 2 .

[0079] In the optical sensor provided by the embodiment of the present disclosure, the light-emitting portion of the light-guiding lens has a first side surface and a first light-emitting surface, and the first light-emitting surface is a convex arc surface that gradually approaches the light-entering surface from the first end of the first side surface away from the light-entering surface, and the convex arc surface can effectively modulate the propagation direction of the light obliquely incident into the light-guiding lens. In addition, the center of the projection of the light-emitting portion on the light-entering surface deviates from the projection of the first end on the light-entering surface, and is located within the projection of the first light-emitting surface on the light-entering surface, so that the first side surface has little effect on the propagation direction of the light, and the light-guiding lens modulates the light mainly by the first light-emitting surface. In this way, when the light-guiding lens is arranged on the side where the light-sensitive surface of the photosensitive element is located, when the light to be detected obliquely enters the light-guiding lens from one side of the light-guiding lens and falls on the first light-emitting surface, the propagation direction of a large part of the light will be modulated by the first light-emitting surface and the propagation direction will be changed, and then fall into the light-sensitive surface of the photosensitive element, that is, in the effective receiving area, so that the intensity of the detected light is enhanced, and the optical detection capability of the optical sensor is also improved.

[0080] Optional, combined Figure 1-3 and 6, the optical sensor further includes a light-emitting component 3, the number of the light-emitting components 3 and the number of the first light-emitting surfaces 123 are both at least one, at least one light-emitting component 3 is circumferentially distributed around the photosensitive element 2 and / or the light-guiding lens 1, at least one first light-emitting surface 123 is circumferentially distributed around the central axis of the light-guiding lens 1, and at least one light-emitting component 3 corresponds to at least one first light-emitting surface 123 one by one;

[0081] When there are multiple first light emitting surfaces 123 , different first light emitting surfaces 123 extend and stop when they intersect each other.

[0082] Based on the above arrangement, an optical sensor that emits light and senses light on the same side is realized. Such an optical sensor can be small in size and can be arranged on the surface of various objects to effectively detect the light absorption inside various objects. In addition, in the above arrangement, the number of first light-emitting surfaces is equal to the number of light-emitting components, and they are arranged one by one, which can effectively improve the optical sensor's sensing effect on the light emitted by each light-emitting component.

[0083] Optional, combined Figure 1-3 and Figure 7 The optical sensor further includes a light emitting component 3, the number of the light emitting components 3 is multiple, and the multiple light emitting components 3 are circumferentially distributed around the photosensitive element 2 and / or the light guide lens 1;

[0084] The first light emitting surface 123 is a continuous arc surface surrounding the central axis of the light guide lens 1 .

[0085] Based on the above settings, on the one hand, the overall photosensitivity of the optical sensor is improved with the help of multiple light-emitting components, and on the other hand, with the help of the continuous curved light-emitting surface surrounding the central axis of the light-guiding lens, effective modulation of the light incident on the light-guiding lens in all directions is achieved, so that the final landing point of the light in all directions falls within the effective modulation area of ​​the photosensitive element.

[0086] In some embodiments, in combination Figure 7-8 A first step 13 is also formed on the side of the light guide lens 1;

[0087] The optical sensor includes a housing 4 having a first opening 41 . The light incident surface 11 of the light guide lens 1 passes through the first opening 41 and is flush with the outer surface of the housing 4 . The first step 13 abuts against the housing 4 inside the housing 4 .

[0088] Based on the above arrangement, the light guide lens can be installed in the optical sensor housing, and with the help of the first step, the light guide lens is ensured not to fall off. At the same time, the light incident surface is flush with the outer surface of the housing, which can effectively ensure the appearance of the optical sensor. The "flush" mentioned here can include strictly flush and roughly flush.

[0089] Optional, combined Figure 1-2 The light emitting component 3 includes a light emitting element 31 and a light emitting lens 32, and the light emitting lens 32 is configured to converge and emit the light emitted by the light emitting element 31. With the help of the light emitting lens 32, the intensity of the light incident on the target object (such as human skin) can be effectively increased, and then the intensity of the light subsequently refracted or reflected can be increased, so that the light signal carries more effective information.

[0090] To sum up, the optical sensor provided by the embodiment of the present disclosure can effectively modulate the incident light with the help of the light-guiding lens, reduce the probability of light falling into the ineffective detection area of ​​the photosensitive element, and increase the light intensity received by the photosensitive element, which is beneficial to improving the detection efficiency of the optical sensor.

[0091] In a third aspect, the present disclosure provides an electronic device, which includes any one of the light-guiding lenses 1 described above, or any one of the optical sensors described above.

[0092] The electronic device provided by the embodiment of the present disclosure can effectively modulate the incident light with the help of a light-guiding lens, reduce the probability of light falling into the ineffective detection area of ​​the photosensitive element, and increase the light intensity received by the photosensitive element, which is beneficial to improving the optical detection efficiency of the electronic device.

[0093] In a fourth aspect, the present disclosure provides an information extraction system. Fig. 9 , the system includes a circuit module 101, a processing module 102 and an optical device module 103;

[0094] The circuit module 101 includes a light emitting element 31 and a light sensing element 2, wherein the light emitting element 31 is configured to emit light and the light sensing element 2 is configured to detect light;

[0095] The optical device module 103 includes a light-emitting lens 32 and any one of the light-guiding lenses 1 described above, wherein the light-emitting lens 32 is located on the light-emitting side of the light-emitting element 31 and is configured to converge and emit the light emitted by the light-emitting element 31, and the light-guiding lens 1 is located on the light-incident side of the photosensitive element 2 and is configured to converge and send the light to the photosensitive surface of the photosensitive element 2;

[0096] The processing module 102 is configured to control the light emitting element 31 to emit light, and to process the signal detected by the photosensitive element 2 .

[0097] Combination Figure 11-12 In the disclosed embodiment, after the light-emitting element in the circuit module emits light, the light-emitting lens of the optical device module can converge and focus the light emitted by the light-emitting element, so that the focused light is incident on the target 5 to be measured (for example, human skin, etc.). After the light is reflected by the surface of the target to be measured and scattered internally, part of it is emitted (the emitted light at this time carries the relevant information of the target to be measured), and the emitted light is converged by the light-guiding lens. The converged light is incident on the photosensitive surface of the photosensitive element, so that the photosensitive element can detect the light signal containing the target information. Next, the processing module can process the signal detected by the photosensitive element to obtain effective information.

[0098] Since the light is converged by means of the light-guiding lens in the aforementioned embodiment, the light intensity detected by the photosensitive element can be significantly enhanced, and thus the efficiency and accuracy of subsequent signal extraction can be significantly improved.

[0099] It should be noted that the light emitting element 31 can be mounted on a circuit board, or electrically connected to a circuit board, and the circuit board can have a control element, which can control the light emitting element to emit light or stop emitting light according to the user's settings or the user's trigger signal, or can control the intensity and frequency band of the light emitted by the light emitting element. The control element here can be an element in the aforementioned processing module, or directly be the processing module. The control element can control the working state of the photosensitive element. When information detection is required, the photosensitive element is controlled to enter a working state, and when information detection is not required, the photosensitive element is controlled to enter a non-working state.

[0100] In some embodiments, in combination Fig.10 and 12 , the processing module 102 includes at least one of a signal amplification circuit 1021 and a filtering circuit 1022;

[0101] The signal amplifying circuit 1021 is configured to amplify the signal detected by the photosensitive element 2;

[0102] The filter circuit 1022 is configured to perform filtering and noise reduction processing on the signal detected by the photosensitive element 2 .

[0103] Optionally, the processing module 102 may further include a calibration circuit 1023 configured to perform calibration processing on the signal detected by the photosensitive element 2 .

[0104] In this embodiment, in order to improve the signal-to-noise ratio of the signal detected by the photosensitive element, a signal amplification circuit may be used to amplify the signal detected by the photosensitive element, a filtering circuit may be used to filter and reduce noise on the signal detected by the photosensitive element, and a calibration circuit may be used to calibrate the signal detected by the photosensitive element. The processing of the above-mentioned several units may be performed sequentially or only one or more of them may be executed. The order between the multiple processing processes may be adjusted according to the needs.

[0105] It should be noted that the aforementioned signal amplification circuit and filtering circuit can be implemented by existing circuits in the prior art. Optionally, the photosensitive element can be a photodiode, which is configured to convert the optical signal into an electrical signal. The electrical signal can be processed by the signal amplification circuit to enhance the signal strength to improve the signal quality.

[0106] Optionally, the filtering frequency band of the filtering circuit can be determined according to the optical properties of the target to be measured, and a suitable filtering circuit can be selected according to the required filtering frequency band. Optionally, the filtering circuit can include a low-frequency filtering circuit, which can remove low-frequency noise in the signal to improve the signal-to-noise ratio of the signal, thereby improving the subsequent information extraction effect.

[0107] Optionally, the calibration circuit can calibrate the signal detected by the photosensitive element with the aid of the calibration signal. Optionally, the calibration circuit can be a differential calibration, which can first measure a reference signal, and perform a differential operation on the signal measured by the photosensitive element and the reference signal to obtain an effective signal for extracting effective information. In this way, the quality of the signal can be further improved.

[0108] In some embodiments, in combination Fig.12 The processing module 102 also includes a data analysis circuit 1024 , which is configured to extract valid information from the signal detected by the photosensitive element 2 .

[0109] In this embodiment, the data analysis circuit may be built with corresponding information extraction to extract effective information from the signal detected by the photosensitive element. The information extraction here can be pre-designed by a technician and implanted into the data analysis circuit to realize automatic analysis and extraction of the system.

[0110] In some embodiments, in combination Fig.12 The system also includes a display element 104, which is configured to display the valid information extracted by the processing module 102.

[0111] Optionally, the display element 104 may include a display, which may have a user interface, and the display element may be connected to the processing module signal, specifically, may be connected to the data analysis circuit or the filtering circuit signal, so as to receive the valid information processed by the data analysis circuit or the filtering circuit, and display it on the user interface. The display element may be displayed in a variety of ways, such as displaying characters on a screen, or outputting audio through an audio output device, etc., which are not specifically limited here.

[0112] Optionally, the display element may have a virtual key or a physical button to receive a user trigger. The display element may be configured to display the aforementioned valid information, or stop displaying the aforementioned valid information, upon receiving a user trigger operation on the virtual key or the physical button.

[0113] In summary, the disclosed embodiments provide an information extraction system, which can realize the whole process of light emission, convergence, reception, preprocessing and data acquisition, realize automatic optical detection of the object to be detected, and can also display the extracted effective information, so that users can easily obtain specific information, which can effectively improve the user experience. Since the light-guiding lens in the aforementioned embodiment is used in the system, the system can obtain a higher quality original signal, and perform simple preprocessing based on the original signal, and the signal can be used for subsequent feature extraction to extract effective information from it, so that the process of optical information detection can be more efficient. In addition, since the quality of the original signal is good, the accuracy of the effective information (such as physiological signals) extracted later is also higher. Subsequent analysis and information display can be directly based on the effective information, and the dependence on complexity is reduced. That is, the overall error of the system can be reduced, the accuracy of analysis can be improved, and the adaptability and robustness are also better.

[0114] In the present disclosure, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more, unless explicitly defined otherwise.

[0115] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the present disclosure disclosed herein. The present disclosure is intended to cover any variations, uses or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The description and examples are intended to be exemplary only.

[0116] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A light guide lens, characterized in that: The light-guiding lens (1) comprises a light-entering surface (11) and a light-emitting portion (12); the light-emitting portion (12) comprises a first side surface (121) and a first light-emitting surface (123); The first light emitting surface (123) is a convex arc surface that starts from a first end (1211) of the first side surface (121) away from the light incident surface (11) and gradually approaches the light incident surface (11); The center of the projection of the light emitting portion (12) on the light incident surface (11) deviates from the projection of the first end (1211) on the light incident surface (11), and is located within the projection of the first light emitting surface (123) on the light incident surface (11).

2. The light guide lens according to claim 1, characterized in that: The first side surface (121) is gradually inclined in a direction approaching the central axis of the light guide lens (1) in a direction from the light incident surface (11) to the first light exit surface (123).

3. The light guide lens according to any one of claims 1 to 2, characterized in that: The number of the first light emitting surfaces (123) is at least one, and they are circumferentially distributed around the central axis of the light guide lens (1), and different first light emitting surfaces (123) terminate when they extend to intersect each other.

4. The light-guiding lens according to any one of claims 1 to 2, characterized in that: The first light emitting surface (123) is a continuous arc surface surrounding the central axis of the light guide lens (1).

5. The light guide lens according to any one of claims 1 to 2, characterized in that: The light emitting portion (12) further comprises a second light emitting surface (122), wherein the second light emitting surface (122) extends from the first end (1211) of the first side surface (121) in a direction close to the central axis of the light guide lens (1) and is connected to the first light emitting surface (123).

6. An optical sensor, characterized in that: It comprises a light-guiding lens (1) and a photosensitive element (2) as claimed in any one of claims 1 to 5, wherein the light-emitting portion (12) of the light-guiding lens (1) faces a photosensitive surface of the photosensitive element (2).

7. The optical sensor according to claim 6, characterized in that The optical sensor further comprises a light-emitting component (3), the number of the light-emitting components (3) and the number of the first light-emitting surfaces (123) are both at least one, at least one of the light-emitting components (3) is circumferentially distributed around the photosensitive element (2) and / or the light-guiding lens (1), at least one of the first light-emitting surfaces (123) is circumferentially distributed around the central axis of the light-guiding lens (1), and at least one of the light-emitting components (3) corresponds one-to-one to at least one of the first light-emitting surfaces (123); Wherein, when there are multiple first light emitting surfaces (123), different first light emitting surfaces (123) extend and terminate when they intersect each other.

8. The optical sensor according to claim 6, characterized in that The optical sensor further comprises a light emitting component (3), the number of the light emitting components (3) is multiple, and the multiple light emitting components (3) are circumferentially distributed around the photosensitive element (2) and / or the light guide lens (1); The first light emitting surface (123) is a continuous arc surface surrounding the central axis of the light guide lens (1).

9. The optical sensor according to any one of claims 6 to 8, characterized in that: The side surface of the light guide lens (1) is also formed with a first step (13); The optical sensor comprises a shell (4), the shell (4) having a first opening (41), the light incident surface (11) of the light guide lens (1) passing through the first opening (41) and being flush with the outer surface of the shell (4), and the first step (13) abutting against the shell (4) inside the shell (4).

10. The optical sensor according to any one of claims 7 to 8, characterized in that: The light-emitting component (3) comprises a light-emitting element (31) and a light-emitting lens (32); the light-emitting lens (32) is configured to converge and emit light emitted by the light-emitting element (31).

11. An electronic device, characterized in that: It comprises the light-guiding lens (1) as described in any one of claims 1 to 5, or the optical sensor as described in any one of claims 6 to 10.

12. An information extraction system, characterized in that: The system comprises a circuit module (101), a processing module (102) and an optical device module (103); The circuit module (101) comprises a light emitting element (31) and a light sensing element (2), wherein the light emitting element (31) is configured to emit light, and the light sensing element (2) is configured to detect light; The optical device module (103) comprises a light-emitting lens (32) and a light-guiding lens (1) according to any one of claims 1 to 5, wherein the light-emitting lens (32) is located on the light-emitting side of the light-emitting element (31) and is configured to converge and emit the light emitted by the light-emitting element (31); and the light-guiding lens (1) is located on the light-incident side of the photosensitive element (2) and is configured to converge and emit the light to the photosensitive surface of the photosensitive element (2); The processing module (102) is configured to control the light emitting element (31) to emit light, and to process the signal detected by the photosensitive element (2).

13. The system according to claim 12, characterized in that The processing module (102) comprises at least one of a signal amplification circuit (1021) and a filtering circuit (1022); The signal amplifying circuit (1021) is configured to amplify the signal detected by the photosensitive element (2); The filtering circuit (1022) is configured to perform filtering and noise reduction processing on the signal detected by the photosensitive element (2).

14. The system according to any one of claims 12-13, characterized in that: The system further comprises a display element (104), wherein the display element (104) is configured to display the information processed by the processing module (102).

Images