Light path assembly, light path device and electronic equipment
By introducing a light-concentrating part into the optical path component, the problem of low light utilization is solved, efficient use of light is achieved, and the optical signal quality and algorithm adaptability are improved.
Patent Information
- Application Number
- CN202410065381.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-16
- Publication Date
- 2025-07-18
AI Technical Summary
Due to the limited reception area of the light metering device, the existing optical path components have low light utilization rate and cannot effectively utilize all incident light.
An optical path component is designed, including a first lens, a second lens and a light-concentrating part. After entering the second lens through the first lens, light is concentrated through the light-concentrating part, and then emitted from the second lens, and concentrated on the light metering device to improve the utilization rate of light.
Through the design of the light-concentrating unit, the waste of light is reduced, the utilization rate of light is improved, the pre-processing steps are simplified, the quality of the optical signal and the accuracy of feature extraction are improved, the complexity of the algorithm is reduced, and the adaptability and robustness of the algorithm are enhanced.
Smart Images
Figure CN120335151A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of optical path propagation, and particularly to an optical path component, an optical path device and an electronic device. Background Art
[0002] The propagation of light is widely used in various fields, such as wearable devices, medical devices, optical devices, vehicle lights and detection devices, etc. For example, blood causes changes in blood volume in the skin when the heart beats. When the heart contracts, blood is pushed into the arteries, causing an increase in blood volume in the arteries, thereby reducing the amount of light absorbed in this area. When the heart relaxes, blood flows back from the arteries, reducing the blood volume in the arteries and increasing the amount of light absorbed in this area. These changes can be captured by circuits and processing modules on the skin surface. Wearable devices use circuits and processing modules to irradiate the skin surface and measure the amount of light passing through the skin. The circuits and processing modules generate a light intensity signal that changes over time, and this signal is called a Photoplethysmogram (PPG for short), which is used to measure heart rate and oxygen saturation. When existing optical path components are used, due to the limited receiving area of the light measuring device, part of the light cannot reach the light measuring device, resulting in low light utilization rate. Summary of the Invention
[0003] This application provides an optical path component, an optical path device and an electronic device that can improve the utilization rate of light.
[0004] This application provides an optical path component, including:
[0005] A fixing member;
[0006] A first lens, fixed to the fixing member and including a first light incident surface and a first light exit surface disposed opposite to the first light incident surface;
[0007] A second lens, fixed to the fixing member and including a second light incident surface, a condensing portion and a second light exit surface disposed opposite to the second light incident surface;
[0008] A light emitting device, located on one side of the first light incident surface of the first lens, and the light emitted by it enters the first lens through the first light incident surface, then exits through the first light exit surface, enters the second lens through the second light incident surface, is condensed by the condensing portion, and then exits through the second light exit surface;
[0009] A light measuring device, located on one side of the second light exit surface, for receiving the light exiting through the second light exit surface.
[0010] Further, the condensing portion includes a convex arc portion.
[0011] Further, the condensing portion bulges towards the direction of the light measuring device.
[0012] Further, the second light-emitting surface includes the outer surface of the arc portion.
[0013] Further, the second light-emitting surface is a 1 / 4 spherical surface.
[0014] An embodiment of the present application provides an optical path device, including: the above-mentioned optical path component.
[0015] An embodiment of the present application provides an electronic device, including: the above-mentioned optical path component.
[0016] Further, when the electronic device is in use, the first light-emitting surface and the second light-incident surface are close to the skin, and the light emitted from the first light-emitting surface enters the skin and then exits and enters the second lens through the second light-incident surface.
[0017] Further, the electronic device includes a signal amplification and processing module and a digital filtering and algorithm calibration module. The signal amplification and processing module is used to amplify the electrical signal emitted by the photometric device, and the digital filtering and algorithm calibration module is used to calibrate the signal amplified by the signal amplification and processing module.
[0018] Further, the electronic device includes a data analysis module and a display screen. The data analysis module is used to analyze the signal calibrated by the digital filtering and algorithm calibration module, and the display screen is used to display the output result of the data analysis module.
[0019] The second lens of the optical path component in the embodiment of the present application includes a light condensing portion. After the light enters the second lens, it is condensed by the light condensing portion and then exits, so as to gather more light on the photometric device, reduce the waste of light, and improve the utilization rate of light. Description of the Drawings
[0020] Figure 1 is a schematic diagram of the electronic device in the embodiment of the present application, where only a part of the electronic device is shown;
[0021] Figure 2 is Figure 1 a schematic diagram of another perspective of the electronic device shown;
[0022] Figure 3 is Figure 1 a schematic cross-sectional view of the electronic device shown;
[0023] Figure 4 is Figure 1 a schematic diagram of the electronic device shown when in use;
[0024] Figure 5 is Figure 4 a schematic optical path diagram of the electronic device shown when in use;
[0025] Figure 6 is Figure 5 The optical path diagram of an embodiment when the electronic device shown is in use;
[0026] Figure 7 is Figure 5 The optical path diagram of another embodiment when the electronic device shown is in use;
[0027] Figure 8 is the CTR simulation diagram of the optical path components of the comparative solution;
[0028] Figure 9 is the CTR simulation diagram of the optical path components of the present application. Detailed implementation manners
[0029] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all the embodiments consistent with the present application. On the contrary, they are merely examples of devices consistent with some aspects of the present application as detailed in the appended claims.
[0030] The terms used in the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. Unless otherwise defined, the technical terms or scientific terms used in the present application should have the ordinary meaning understood by those of ordinary skill in the field to which the present application belongs. The "first", "second" and similar terms used in the specification and claims of the present application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, the similar terms such as "a" or "one" do not indicate a quantity limitation, but indicate that there is at least one. "Multiple" or "several" means two or more. Unless otherwise specified, the similar terms such as "front part", "rear part", "lower part" and / or "upper part" are only for convenience of description and are not limited to one position or a spatial orientation. The terms "including" or "comprising" and similar terms mean that the elements or objects appearing before "including" or "comprising" cover the elements or objects listed after "including" or "comprising" and their equivalents, and do not exclude other elements or objects. The terms "connected" or "coupled" and similar terms are not limited to physical or mechanical connections, and may include electrical connections, whether direct or indirect. The singular forms "a", "the" and "said" used in the specification and appended claims of the present application are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more of the associated listed items.
[0031] The optical path component of the present application can be applied to products such as wearable products, medical devices, and optical devices that require optical detection of biological characteristics, and can also be applied to the fields of vehicle lights and detection. The present application does not limit the application scenarios of the shown optical path components.
[0032] See Figures 1 to 4 As shown, the optical path component includes a fixing member 1, a first lens 2, a second lens 3, a light emitting device 4, and a light measuring device 5.
[0033] The first lens 2 and the second lens 3 are fixed on the fixing member 1, and can be directly fixed or indirectly fixed. The first lens 2 includes a first light incident surface 21 and a first light emitting surface 22 disposed opposite to the first light incident surface 21. The second lens 3 includes a second light incident surface 31, a condensing portion 32, and a second light emitting surface 33 disposed opposite to the second light incident surface 31.
[0034] The light emitting device 4 is located on one side of the first light incident surface 21 of the first lens 2. The light emitted by the light emitting device 4 enters the first lens 2 through the first light incident surface 21, then exits through the first light emitting surface 22, enters the second lens 3 through the second light incident surface 31, is condensed by the condensing portion 32, and then exits through the second light emitting surface 33.
[0035] The light measuring device 5 is located on one side of the second light emitting surface 33, and is used to receive the light exiting through the second light emitting surface 33.
[0036] In one embodiment, the light emitting device 4 is located above the first lens 2 and above the first light incident surface 21, and the light measuring device 5 is located above the second lens 3 and above the second light emitting surface 33.
[0037] In one embodiment, both the light emitting device 4 and the light measuring device 5 are fixed on the fixing member 1, and can be directly fixed or indirectly fixed.
[0038] The second lens 3 includes a condensing portion 32. After the light enters the second lens 3, it is condensed by the condensing portion 32 and then exits, so as to gather more light on the light measuring device 5, reduce the waste of light, and improve the utilization rate of light.
[0039] In some embodiments, the second lens 3 is a convex lens or has a convex lens formed inside to achieve the condensing function; in some embodiments, a convex lens is formed inside, including hollowing out the inside of the second lens 3 to form a convex lens.
[0040] In some embodiments, the condensing portion 32 includes a protruding arc portion 321.
[0041] In some embodiments, the light condensing portion 32 protrudes towards the photometric device 5.
[0042] In some embodiments, the second light emitting surface 33 includes the outer surface of the arc portion 321.
[0043] In some embodiments, the second light emitting surface 33 is a 1 / 4 spherical surface.
[0044] In some embodiments, the fixing member 1 can be made of plastic or the like for fixing the first lens 2 and the second lens 3.
[0045] In some embodiments, the fixing member 1 is provided with a first assembly hole 11 and a second assembly hole 12. The first lens 2 is fixed into the first assembly hole 11, and the second lens 3 is fixed in the second assembly hole 12.
[0046] In some embodiments, the fixing member 1 includes a first surface 14 and a second surface 15 opposite to the first surface 14. The first assembly hole 11 and the second assembly hole 12 respectively penetrate through the first surface 14 and the second surface 15. The first light incident surface 21 and the second light emitting surface 33 are exposed outside the first surface 14, and the first light emitting surface 22 and the second light incident surface 31 are exposed outside the second surface 15.
[0047] One or more light emitting devices 4 can be provided. A plurality of the light emitting devices 4 can be arranged in an array or surrounded in a ring.
[0048] One or more photometric devices 5 can be provided. A plurality of the photometric devices 5 can be arranged in an array or surrounded in a ring. When a plurality of the photometric devices 5 are arranged in an array, the light condensing portion 32 extends along the array direction of the plurality of photometric devices 5; when a plurality of the photometric devices 5 are surrounded in a ring, the light condensing portion 32 extends along the ring direction surrounded by the plurality of photometric devices 5.
[0049] An embodiment of the present application provides an optical path device including the above optical path component.
[0050] An embodiment of the present application provides an electronic device including the above optical path component.
[0051] See Figures 4 to 7 As shown, the electronic device includes a circuit and a processing module. The circuit and the processing module include the photometric device 5 and the light emitting device 4. The photometric device 5 is used to measure the intensity of the light emitted by the light emitting device 4, for example, to measure the intensity of the light passing through the skin.
[0052] When the electronic device is in use, the first light-emitting surface 22 and the second light-incident surface 31 are close to the skin. The light emitted from the first light-emitting surface 22 enters the skin, exits, and then enters the second lens 3 through the second light-incident surface 31.
[0053] Optionally, the light-emitting device 4 is a light-emitting diode (LED), and the light-measuring device 5 is a photodiode (PD). The LED is located above the first lens 2, and the PD is located above the second lens 3.
[0054] In one embodiment, an LED emits red light (usually at a wavelength of 660 nm) and infrared light (usually at a wavelength of 940 nm) onto the skin, and then a PD is used to measure the intensity of the light transmitted through the skin.
[0055] In one embodiment, an LED emits green light (usually at a wavelength of 530 nm) onto the skin, and then a PD is used to measure the intensity of the light transmitted through the skin.
[0056] See Figures 6 to 7 As shown, the circuit and processing module includes the light-emitting device 4, the light-measuring device 5, and a signal amplification and processing module. Optionally, the light-emitting device 4 is an LED light source, and the light-measuring device 5 is a PD detector.
[0057] The optical device module includes the first lens 2 and the second lens 3, which critically affect the focusing and transmission of light. The first lens 2 is an LED lens, and the second lens 3 is a PD lens.
[0058] The human body serves as a medium for light incidence and reflection.
[0059] The electronic device includes a signal amplification and processing module 6 and a digital filtering and algorithm calibration module 7. The signal amplification and processing module 6 is used to amplify the electrical signal emitted by the light-measuring device 5, and the digital filtering and algorithm calibration module 7 is used to optimize the signal amplified by the signal amplification and processing module 6.
[0060] The electronic device includes a data analysis module 8 and a display screen 9. The data analysis module 8 is used to analyze the signal calibrated by the digital filtering and algorithm calibration module 7 and optimize the algorithm to adapt to higher-quality data. The display screen 9 is used to display the output results of the data analysis module 8, such as heart rate and blood oxygen saturation.
[0061] Due to the setting of the light-condensing portion 32 of the second lens 3, light loss is reduced, and the quality of the optical signal is improved, having the following beneficial effects:
[0062] 1. Reduced complexity of preprocessing: The preprocessing steps become simpler, reducing the computational burden and the need for filtering.
[0063] 2. Improved accuracy of feature extraction: The improved optical signal quality makes the feature extraction process more accurate, enabling efficient feature extraction and reducing errors and the need for adjustment.
[0064] 3. Reduced overall complexity of the algorithm: The overall algorithm flow is simplified due to the improved optical signal quality, reducing the dependence on complex algorithms.
[0065] 4. Enhanced adaptability and robustness of the algorithm: The improved optical signal quality makes the algorithm more adaptable and stable to different users and environmental conditions, enhancing its adaptability and robustness.
[0066] See Figures 8 to 9 , it can be seen that the optical path components of this application cause the optical path to converge at the center of the photometric device 5, reducing the waste of light on the non-effective receiving area of the photometric device 5. From the CTR (current transfer ratio) simulation comparison between this application and its comparative scheme, it can be known that the light received by the photometric device 5 of the optical path components of this application has increased by 4 dB, and the effect is remarkable.
[0067] The above are only the preferred embodiments of this application, and do not impose any form of limitation on this application. Although this application has been disclosed above in preferred embodiments, it is not intended to limit this application. Any person skilled in the art, without departing from the technical solution of this application, can make some changes or modifications to the above-disclosed technical content to form equivalent embodiments with equivalent changes. However, as long as it does not depart from the technical content of this application, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of this application still fall within the scope of the technical solution of this application.
Claims
1. An optical path component, characterized in that, Comprising: A fixing member; A first lens, fixed to the fixing member and including a first light incident surface and a first light exit surface disposed opposite to the first light incident surface; A second lens, fixed to the fixing member and including a second light incident surface, a light condensing portion, and a second light exit surface disposed opposite to the second light incident surface; A light emitting device, located on one side of the first light incident surface of the first lens, the light emitted therefrom enters the first lens through the first light incident surface, then exits through the first light exit surface and enters the second lens through the second light incident surface, and after being condensed by the light condensing portion, exits through the second light exit surface; A photometric device, located on one side of the second light exit surface, for receiving the light exiting through the second light exit surface.
2. The optical path component according to claim 1, wherein The light condensing portion includes a protruding arc portion.
3. The optical path component according to claim 2, wherein The light condensing portion protrudes in the direction towards the photometric device.
4. The optical path component according to claim 3, wherein The second light exit surface includes the outer surface of the arc portion.
5. The optical path component according to claim 4, wherein The second light exit surface is a 1 / 4 spherical surface.
6. An optical path device, characterized in that, Comprising: The optical path assembly according to any one of claims 1 to 5.
7. An electronic device, characterized in that, Comprising: The optical path assembly according to any one of claims 1 to 6.
8. The electronic device according to claim 7, wherein When the electronic device is in use, the first light exit surface and the second light incident surface are close to the skin, the light exiting from the first light exit surface enters the skin and then exits and enters the second lens through the second light incident surface.
9. The electronic device according to claim 8, wherein The electronic device includes a signal amplification and processing module and a digital filtering and algorithm calibration module, the signal amplification and processing module is used to amplify the electrical signal emitted by the photometric device, and the digital filtering and algorithm calibration module is used to calibrate the signal amplified by the signal amplification and processing module.
10. The electronic device according to claim 9, wherein The electronic device includes a data analysis module and a display screen, the data analysis module is used to analyze the signal calibrated by the digital filtering and algorithm calibration module, and the display screen is used to display the output result of the data analysis module.