Eye shade and near-infrared brain function imaging head cap assembly
By coordinating the design of the light-blocking goggles and the near-infrared brain functional imaging headgear, the problem of near-infrared light interference was solved, the stability and accuracy of the data were improved, and the cost was reduced.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DANYANG HUICHUANG MEDICAL EQUIP CO LTD
- Filing Date
- 2024-12-30
- Publication Date
- 2026-05-15
AI Technical Summary
Near-infrared brain functional imaging equipment is easily interfered with by near-infrared light in the environment or other equipment during the detection process, which leads to signal interference and difficulties in data analysis.
A light-blocking goggle and a near-infrared brain functional imaging headgear assembly is provided. By wearing the goggle and headgear together, the occlusion range can be controlled so that the upper edge of the goggle body extends across the subject's forehead, the smooth part is located above the highest point of the orbital bone, and the upper edge of the eye hole is located below the highest point of the orbital bone, thus blocking near-infrared light emitted by the environment or multimodal devices.
It significantly improves the stability and reliability of data during the acquisition process, reduces the signal interference of near-infrared light on the fNIRS probe directly above the forehead and eye socket, improves the accuracy of measurement data, and saves costs.
Smart Images
Figure CN224235646U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of medical device technology, specifically to a light-shielding goggle and a near-infrared brain function imaging headgear assembly. Background Technology
[0002] Near-infrared functional brain imaging (fNIRS) equipment is susceptible to interference from ambient light during signal acquisition, especially when used in conjunction with other modal devices (eye tracking, motion capture, etc.). For instance, the near-infrared light emitted by multimodal devices can interfere with the signals acquired by the fNIRS headgear, causing significant signal jumps and hindering data analysis. The near-infrared frequency band with wavelengths of 650-900 nm is particularly prone to causing signal interference in fNIRS data acquisition.
[0003] To reduce the impact of ambient light, especially near-infrared light, researchers have adopted various strategies, including using equipment with strong anti-interference capabilities, optimizing the experimental environment, improving the configuration of light sources and detectors, and developing advanced signal processing algorithms to remove or correct interference caused by external light sources. However, reducing the interference of ambient light, especially near-infrared light, by controlling the experimental environment or the configuration of the equipment requires a lot of manpower and resources to develop equipment or algorithms. Moreover, experiments have shown that the above-mentioned equipment improvements cannot achieve a good effect in resisting ambient light, especially near-infrared light interference. Utility Model Content
[0004] This application aims to provide a light-shielding eye mask and a near-infrared brain functional imaging headgear assembly to solve the problem that near-infrared brain functional imaging equipment is easily interfered with by near-infrared light in the environment or other equipment during the detection process.
[0005] According to a first aspect of this application, a light-blocking goggle is provided. The goggle is worn on the head of a subject in conjunction with a near-infrared brain functional imaging headgear. The goggle includes: a goggle body containing a near-infrared light-blocking material and a fixing mechanism connected to the goggle body. The fixing mechanism is configured to fix the goggle body to the subject's head when worn. The goggle body has an upper edge and a lower edge, and a pair of eye openings. The upper edge includes a centrally located smooth portion, and the lower edge has a nose-avoiding recess in the middle. When the goggle is worn on the subject's head and the subject's eyes are fully exposed through the eye openings, the upper edge extends across the subject's forehead in a natural or stretched state. The smooth portion is located at a first preset height above the highest point of the orbital bone on both sides of the subject, and the upper edge of each eye opening is located at a second preset height below the highest point of the orbital bone on the corresponding side of the subject.
[0006] In some embodiments, the first preset height is 5mm-30mm above the highest point of the orbital bone, and the second preset height is 3mm-35mm below the highest point of the orbital bone.
[0007] In some embodiments, the width of the narrowest part of the eye mask body around the eye holes is not less than 5 mm.
[0008] In some embodiments, the width at the widest point of the distance between the upper and lower edges of the eye hole is not less than 18 mm.
[0009] In some embodiments, the light-blocking goggles are configured to provide circumferential tension along the subject's head.
[0010] In some embodiments, the fixing mechanism includes strap structures disposed on both sides of the goggle body.
[0011] In some embodiments, the strap structure is configured to be worn on the subject's ears and / or to wrap around the subject's head circumference together with the goggle body.
[0012] In some embodiments, the strap structures located on both sides of the goggle body are detachably connected at the ends away from the goggle body, and after connection, they form a closed loop together with the goggle body.
[0013] In some embodiments, the eye mask body containing near-infrared light-blocking material includes one layer or several layers arranged sequentially from the inside to the outside, wherein at least one layer is light-blocking velvet.
[0014] According to a second aspect of this application, a near-infrared brain functional imaging headgear assembly is provided. The near-infrared brain functional imaging headgear assembly includes: a near-infrared brain functional imaging headgear, on which multiple probe mounting portions are provided, and a forehead extension located in front of the probe mounting portions at the forehead; and a light-shielding eye shield according to various embodiments of this application, wherein when the near-infrared brain functional imaging headgear and the light-shielding eye shield are worn together on the subject's head, allowing the subject's eyes to be fully exposed through eye openings, the upper edge is circumferentially fitted to the forehead extension of the near-infrared brain functional imaging headgear in a natural or stretched state, such that there is no exposed area between the forehead extension of the near-infrared brain functional imaging headgear and the eye shield body of the light-shielding eye shield.
[0015] Compared with the prior art, the beneficial effects of the embodiments of this utility model are as follows:
[0016] The light-blocking goggles provided in this embodiment, when worn in conjunction with a near-infrared brain functional imaging headgear on the subject's head, control the range of obstruction on the subject's head. The upper edge of the goggles extends across the subject's forehead in either a natural or stretched state, with the smooth portion positioned at a first preset height above the highest points of the orbital bones on both sides of the subject. The upper edges of each eye opening are positioned at a second preset height below the corresponding orbital bone highest point on the subject's side. This allows the goggles to block near-infrared light emitted from the environment or multimodal devices, significantly improving the stability and reliability of data during acquisition. This also greatly reduces signal interference to the fNIRS probe located directly above the forehead and eye sockets, significantly improving the accuracy of the fNIRS probe's measurement data while saving costs.
[0017] This utility model description introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This utility model description is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.
[0018] The advantages and features of this application are described in detail below with reference to the accompanying drawings. Attached Figure Description
[0019] The following drawings, which are incorporated herein by reference and are used to understand this application, illustrate embodiments of the invention and their descriptions to explain the principles of the invention. In the drawings,
[0020] Figure 1 A perspective view is shown of a light-blocking goggle worn on the head of a subject according to an exemplary embodiment of this application;
[0021] Figure 2 It shows Figure 1 Front view of the light-blocking goggles worn on the subject's head in the illustrated embodiment;
[0022] Figure 3 It shows Figure 1 A perspective view of the light-blocking eye mask of the embodiment shown; and
[0023] Figure 4 A schematic diagram showing the wearing position of the eye patch on the skull is shown.
[0024] The above figures include the following reference numerals:
[0025] 100. Eye shield; 200. Headgear; 210. Forehead extension; 230. Probe mounting section; 240. fNIRS probe; 300. Eye shield body; 310. Upper edge; 311. Smooth section; 320. Lower edge; 321. Nose avoidance recess; 330. Eye opening; 331. Upper edge; 332. Lower edge; 400. Fixation mechanism; 410. Strap structure; 420. Tightener; 430. Double hook component; 500. Subject's head; 510. High point of the orbital bone. Detailed Implementation
[0026] In the following description, numerous details are provided to enable a thorough understanding of this application. However, those skilled in the art will appreciate that the following description merely illustrates preferred embodiments of the application, and that the application can be implemented without one or more of these details. Furthermore, to avoid confusion with this application, some technical features well-known in the art have not been described in detail.
[0027] To fully understand the embodiments of this application, a detailed structure will be presented in the following description. Obviously, the implementation of the embodiments of this application is not limited to the specific details familiar to those skilled in the art. Preferred embodiments of this application are described in detail below; however, in addition to these detailed descriptions, this application may have other embodiments.
[0028] The researchers in this application found that the main reasons why near-infrared functional brain imaging (fNIRS) devices are susceptible to the influence of ambient light, especially near-infrared light, include: 1) Light source sensitivity: fNIRS devices measure brain activity by emitting and receiving near-infrared light. The device is very sensitive to light sources, and changes in ambient light, especially near-infrared light, may interfere with these measurements; 2) Light scattering and absorption: Near-infrared light is scattered and absorbed when penetrating brain tissue. The presence of external light sources may increase scattered light, thereby affecting the accurate detection of changes in brain hemoglobin by the fNIRS device; 3) Device calibration: The intensity and wavelength of the light source need to be kept stable to ensure data quality. Fluctuations in ambient light may affect device calibration, thereby affecting the stability and reliability of the data; 4) Data acquisition environment: The stability of the experimental environment is crucial during data acquisition. Interference from external light sources and the movement of the subject may produce artifacts, affecting the accuracy of the data. 5) Non-stationary waveforms: fNIRS signals are inherently non-stationary, meaning they may contain components not related to neuronal activity caused by changes in the external environment. These components need to be removed through preprocessing to reduce interference with the data. 6) Systemic hemodynamic responses: Modulation of the heart, respiration, and blood pressure can also affect the recorded data. These systemic hemodynamic response sources are part of the high-frequency interference of neuronal hemodynamic responses. Ambient light may affect these physiological processes, thereby affecting the fNIRS signal.
[0029] To reduce the influence of ambient light, especially near-infrared light, existing technologies have adopted various strategies for equipment improvement and environmental optimization, but the effects have been limited. The inventors of this application have verified that interference signals are mainly concentrated in the area directly above the eye socket on the forehead, where the channel signal interference around the receiving probe is most pronounced. Therefore, this invention provides a light-shielding goggle. When worn in conjunction with a near-infrared brain functional imaging headgear, the goggle's coverage area is controlled. The upper edge of the goggle extends across the subject's forehead in either a natural or stretched state, with the smooth portion positioned at a first preset height above the highest points of the orbital bones on both sides of the subject. The upper edges of each eye opening are positioned at a second preset height below the corresponding orbital bone highest point on the subject's side, ensuring no exposed area on the subject's forehead. Furthermore, the goggle itself can block near-infrared light emitted from the environment or multimodal devices, thereby greatly improving the stability and reliability of data during the acquisition process. This significantly reduces near-infrared light interference with the fNIRS probe located directly above the forehead and eye socket, significantly improving the accuracy of the fNIRS probe's measurement data, and saving costs while ensuring effectiveness.
[0030] According to one aspect of this application, a light-blocking eye mask 100 is provided. Figure 1 ,2 As shown in Figure 3, the light-blocking goggle 100 can be worn in conjunction with the near-infrared brain functional imaging headgear 200 (hereinafter referred to as headgear 200) on the subject's head 500. When the light-blocking goggle 100 is worn on the subject's head 500, it can be located on the outside of the headgear 200. The fNIRS probe 240 provided on the headgear 200 can detect the fNIRS signal of the subject's brain. The term "head" as used in this application refers to organs above the neck (cervical spine) of the human body, including the brain and extracranial tissues such as the skull, skin, and hair. The term "brain" as used in this application refers to the organ remaining after the removal of extracranial tissues, mainly intended to refer to the cerebrum, but not limited to this, and may also include the cerebrum, cerebellum, and brainstem.
[0031] According to another aspect of this application, a near-infrared brain functional imaging headgear assembly (hereinafter referred to as the headgear assembly) is also provided. The headgear assembly may include a headgear 200 and a light-shielding eye shield 100 as described in various embodiments of this application. The headgear 200 may be provided with a plurality of probe mounting portions 230. Typically, each probe mounting portion 230 can be used to mount one fNIRS probe 240. With the aid of the probe mounting portions 230, the fNIRS probe 240 can be conveniently and detachably connected to a predetermined position on the headgear 200. The probe mounting portions 230 can be constructed in any structure, as long as they can accommodate the fNIRS probe 240. After the fNIRS probe 240 is mounted on the headgear 200, the detection channel formed between the transmitting and receiving probes can cover any brain region of interest, including but not limited to one or more of the frontal lobe, temporal lobe, parietal lobe, occipital lobe, and greater motor cortex. Figure 1-2 As shown, the headgear 200 may include a forehead extension 210. The forehead extension 210 extends along the circumferential direction of the subject's head 500. The fNIRS probe 240 corresponding to the frontal lobe region may be located above the forehead extension 210, that is, the forehead extension 210 is located in front of the probe mounting portion 230 at the forehead, and the forehead extension 210 forms the front end of the headgear 200. When the headgear 200 is worn on the subject's head 500, the forehead extension 210 may abut against the forehead of the subject's head 500.
[0032] The light-blocking goggle 100 may include a goggle body 300 and a fixing mechanism 400. When the goggle body 300 is worn on the subject's head 500, it covers the area around the subject's eyes. The goggle body 300 may contain a near-infrared light-blocking material. That is, the goggle body 300 may be made of a light-blocking material that completely prevents the passage of near-infrared light, or it may be made of a light-blocking material that blocks some wavelengths of near-infrared light (especially wavelengths in the 650-900nm range) or that does not achieve 100% near-infrared light blocking. Thus, the goggle body 300 containing a near-infrared light-blocking material can effectively reduce or prevent the passage of near-infrared light. Near-infrared light-blocking materials include, but are not limited to, fabric, plastic, or metal. Exemplarily, other parts of the goggle body 300 may also contain near-infrared light-blocking material.
[0033] The fixation mechanism 400 can be connected to the goggle body 300 by any suitable method, such as adhesive or sewing. The fixation mechanism 400 can be configured to secure the goggle body 300 to the subject's head 500 when worn. Exemplarily, the fixation mechanism 400 can secure the goggle body 300 to the subject's head 500 in various ways, such as by stretching the goggle body 300 to tightly fasten it to the subject's head 500, or by connecting it to tissues such as the subject's ears. The structure of the fixation mechanism 400 can be arbitrary, including but not limited to lanyards, straps, Velcro, tape, hooks, and / or clips. By providing the fixation mechanism 400, displacement of the goggle body 300 can be prevented.
[0034] The eye mask body 300 may have an upper edge 310 and a lower edge 320. Furthermore, the eye mask body 300 may have a pair of eye openings 330. The pair of eye openings 330 may be provided corresponding to each of the examinee's eyes. The pair of eye openings 330 may be located between the upper edge 310 and the lower edge 320. Except for the pair of eye openings 330, the eye mask body 300 extends continuously from the upper edge 310 to the lower edge 320 to ensure light-blocking performance. The upper edge 310 may include a centrally located smooth portion 311. This centrality is relative to the examinee's head 500; that is, along the circumferential direction of the examinee's head 500, the smooth portion 311 may be generally located in the middle region of the examinee's face. The middle region, for example, corresponds to the area between the eyes. Optionally, along the circumferential direction, the middle region may be longer or shorter than the area between the eyes. The smooth portion 311 can be a smooth line without breaks and / or obvious bends. A nose-avoiding recess 321 can be provided in the middle of the lower edge 320. The nose-avoiding recess 321 can be an upwardly concave structure with its opening facing downward. In this way, when the goggles body 300 is worn on the subject's head 500, the nose-avoiding recess 321 can provide space for the subject's nose, allowing the subject's nose to fit precisely into the nose-avoiding recess 321. This allows the goggles body 300 to fit as closely as possible to the subject's face. The nose can also play a certain role in positioning the goggles body 300, helping it to be correctly worn in the appropriate position on the subject's face. Moreover, after the goggles body 300 is worn on the subject's face, the nose can also prevent the goggles body 300 from moving downward.
[0035] Optionally, the goggle body 300 can be elastic. Thus, the goggle body 300 can have a natural state and a stretched state. The goggle body 300 can switch from a natural state to a stretched state under external force. When the goggle body 300 is worn on the subject's head 500, it can be in a stretched state. When the goggle body 300 is worn and the external force is removed, it can return to its natural state due to its own elasticity, or it can remain in a slightly stretched state to provide pressure to the forehead extension 210 of the headgear 200 and the subject's face, preventing ambient light, especially near-infrared light, from entering the headgear 200 through the gap between the forehead extension 210 and the subject's forehead and interfering with the detection. The parts of the face to which pressure is applied by the goggle body 300 include one or more of the orbital bone, forehead, and upper bridge of the nose. For example, the goggle body 300 can primarily apply pressure to the portion of the orbital bone above the eyes and / or the forehead to more effectively prevent ambient light from entering the headgear 200. Furthermore, by applying pressure to the forehead extension 210 and the subject's face through the goggle body 300, it is possible to prevent the goggle body 300 from slipping off. Optionally, the goggle body 300 may also be non-elastic. In this case, the goggle body 300 can simply be in its natural state. Although the goggle body 300 is not elastic at this time, it can still apply a certain amount of pressure to the subject's face after the goggle body 300 is fixed to the subject's head 500 by the fixing mechanism 400. Optionally, the fixing mechanism 400 may be elastic, and after being worn on the subject's head 500, the fixing mechanism 400 may be in a slightly stretched state. All of the above situations can prevent interference from ambient light, especially near-infrared light, on the headgear 200, and can also prevent the goggle body 300 from slipping off.
[0036] Optionally, the eye mask body 300 may be partially elastic while another part is not. For example, the upper edge 310 may be elastic or not. Therefore, the upper edge 310 will be described in detail below.
[0037] When the light-blocking eye mask 100 is worn on the subject's head 500, the subject's eyes are fully exposed through the eye openings 330. Full exposure means that the eye openings 330 completely expose the corresponding eye contours without affecting the normal opening and closing of the eyes. Thus, the light-blocking eye mask 100 does not cause the subject any pressure and can be easily used in conjunction with eye-tracking devices. In this case, the upper edge 310 can extend across the subject's forehead in either a natural or stretched state. The upper edge 310 can be elastic or inelastic; in either case, after the subject's head 500 is in place, the upper edge 310 can cross the subject's forehead.
[0038] The smooth portion 311 can be located at a first preset height above the orbital bone high point 510 on both sides of the subject. The orbital bone high point 510 can be seen in [reference needed]. Figure 4 The smooth portion 311 extends smoothly at a first preset height above the orbital bone high point 510 and at a first preset height above the orbital bone high points 510 on both sides of the examinee. The upper edge 331 of each eye hole 330 can be located at a second preset height below the orbital bone high point 510 on the corresponding side of the examinee. Thus, the upper edge 331 of each eye hole 330 can be lower than the forehead extension 210 of the headgear 200. In this way, when the light-blocking goggles 100 and the headgear 200 are worn on the examinee's head 500, there is no gap between the projections formed on the examinee's forehead by the forehead extension 210 of the headgear 200 and the goggles body 300 of the light-blocking goggles 100, so that there is no exposed area of the forehead between them.
[0039] On the one hand, through the aforementioned method, the goggle body 300 of the light-blocking goggle 100 can cover more of the subject's forehead, effectively extending the forehead extension 210 of the headgear 200 downwards. This lengthens the path of ambient light entering the headgear 200 through the gap between the forehead extension 210 and the forehead, and increases the bend in this path, thereby reducing the amount of light entering the headgear 200. On the other hand, as mentioned earlier, to prevent the light-blocking goggle 100 from slipping off, the goggle body 300 typically applies a certain amount of pressure to the forehead extension 210 and the subject's face. The pressure point of the goggle body 300 on the subject's face is typically a protruding point of the face, avoiding the eyes through the eye openings 330. Thus, the pressure point mainly includes the orbital bone and / or the forehead. Depending on the shape of the nose avoidance recess 321, the pressure point may also include the upper part of the bridge of the nose. The pressure applied to the forehead allows the forehead extension 210 of the headgear 200 to fit snugly against the subject's forehead, reducing the gap between the forehead extension 210 and the forehead. Pressure applied to the orbital bone, especially the portion of the orbital bone above the eyes, further blocks the gap between the forehead extension 210 and the forehead. This not only prevents the amount of near-infrared light entering the headgear 200 but also prevents leakage of near-infrared light emitted by the fNIRS probe 240 at the forehead of the headgear 200. In summary, according to the above embodiment, the amount of light passing through the gap between the forehead extension 210 and the forehead can be reduced, thereby significantly reducing interference from ambient light, especially near-infrared light, during the near-infrared brain functional imaging headgear assembly. This greatly improves the stability and reliability of the data during acquisition and effectively ensures the accuracy of the detection data.
[0040] Furthermore, in practice, it has been found that the shape of the foreheads of subjects varies considerably. When the cap 200 and the goggles 100 are worn together on the subject's head 500, the forehead extension 210 of the cap 200 can be held between the goggles 100 and the subject's forehead under the action of the goggles 100. This overcomes the differences in head shape of the subject's head 500, ensuring a tight fit between the forehead extension of the cap 200 and the subject's head 500. Thus, the near-infrared light emitted by the fNIRS probe 240 and ambient light cannot be transmitted through the gap between the forehead extension 210 and the subject's forehead, thereby avoiding the possibility of light leakage and significantly reducing the probability of near-infrared light interference with the acquired signal. Moreover, the goggles 300 can block the near-infrared light emitted by the multimodal device, preventing this near-infrared light from illuminating the subject's forehead. This can greatly reduce signal interference to the fNIRS probe 240 located directly above the forehead and eye socket, and improve the accuracy of the measurement data of the fNIRS probe 240 (especially the accuracy of frontal lobe measurements).
[0041] In some embodiments, the second preset height can be 3mm-35mm below the orbital bone high point 510, for example, it can be 3mm, 5mm, 10mm, 15mm, 20mm, 25mm, 30mm, 35mm or any value between them. Further, the second preset height can be 6mm-21mm below the orbital bone high point 510. When the distance between the upper edge 331 of the eye hole 330 and the orbital bone high point 510 is less than 3mm, it will affect the coverage area of the eye mask body 300, which may result in a small amount of near-infrared light irradiating the subject's forehead. When the distance between the upper edge 331 of the eye hole 330 and the highest point 510 of the orbital bone is greater than 35mm, the eye hole 330 may be misaligned with the subject's eyes, failing to fully expose the subject's eyes. The eye mask body 300 may also affect the subject's eye movement or even obstruct their vision, causing excessive pressure and extreme discomfort during the test. This can lead to anxiety, irritability, and resistance to the test, resulting in poor test results. Furthermore, the eye mask body 300 may prevent the headgear assembly from being used in conjunction with the eye-tracking device.
[0042] In some embodiments, the first preset height can be 5mm-30mm above the orbital bone high point 510, for example, it can be 5mm, 10mm, 15mm, 20mm, 25mm, 30mm or any value between them. Further, the first preset height can be 8mm-15mm above the orbital bone high point 510. Exemplarily, the height difference between the upper edge 331 of the eye opening 330 and the smooth portion 311 can be about 26mm. The term "about" as used in this application means within a range of ±2mm. When the distance between the smooth portion 311 and the orbital bone high point 510 is less than 5mm, the smooth portion 311 is too close to the orbital bone high point 510, making it difficult to fully fit the forehead extension 210, and thus difficult to achieve no exposed area between it and the forehead extension 210. When the distance between the smooth portion 311 and the orbital bone high point 510 is greater than 30mm, the eye shield body 300 will cover an excessively large area of the head cap 200, causing the probe mounting portion 230 of the head cap 200 to be set backward. Consequently, the fNIRS probe 240 cannot fully cover the subject's frontal lobe area. Thus, the fNIRS probe 240 cannot fully measure the effective data of the subject's frontal lobe area.
[0043] In some embodiments, the narrowest width of the eye mask body 300 surrounding the eye hole 330 can be no less than 5 mm, for example, it can be 5 mm, 8 mm, 10 mm, 12 mm, 14 mm, 18 mm, 20 mm, or any value between them. Further, the narrowest width of the eye mask body 300 surrounding the eye hole 330 can be around 12 mm. The width refers to the minimum distance between the edge of the eye hole 330 and the edge of the eye mask body 300, for example, the minimum distance between the lower edge 332 of the eye hole 330 and the nose relief recess 321. When the narrowest width of the eye mask body 300 surrounding the eye hole 330 is too small, it will lead to a decrease in the structural strength of the eye mask body 300, and during wear (especially under tension), the portion around the eye hole 330 is prone to cracking or even breaking.
[0044] In some embodiments, the width of the widest point of the distance between the upper and lower edges of the eye hole 330 can be no less than 18 mm, for example, it can be 18 mm, 22 mm, 26 mm, 30 mm, 34 mm, 38 mm, 40 mm or any value between them. Further, the width of the widest point of the distance between the upper and lower edges of the eye hole 330 can be around 28 mm. The widest part of the palpebral fissure of an adult is generally 10 mm-15 mm. When the width of the widest point of the distance between the upper and lower edges of the eye hole 330 is too small, it will result in insufficient exposure of the examinee's eyes. The eye mask body 300 will affect the examinee's eye movement and may even block the examinee's vision, thereby causing excessive pressure on the examinee. In addition, the eye mask body 300 will also prevent the headgear assembly from being used in conjunction with the eye-tracking device.
[0045] In some embodiments, the goggle body 300 containing near-infrared light-blocking material may include one layer or several layers arranged sequentially from the inside out, such as two, three, or more layers. At least one layer may be a light-blocking fleece. Preferably, the light-blocking fleece may include a matte frosted fleece. Exemplarily, the light-blocking fleece may be made of matte, high-fastness nylon fabric. The lining or the entire light-blocking fabric may be black. Black offers better light-blocking properties compared to other colors. Exemplarily, the weight of the light-blocking fleece may be 100 g / m². 2 -200g / m 2 For example, the entire goggle body 300 can be made of light-blocking fleece. The fleece has good light-blocking properties, effectively preventing near-infrared light from passing through. Furthermore, the fleece has good elasticity, exhibiting uniform stretching capacity in at least two perpendicular directions within its plane, facilitating switching between a natural and stretched state. Thus, the goggle body 300 can be switched to the stretched state without requiring significant force, making it easy to place the light-blocking goggle 100 on the subject's head 500. And, when the light-blocking goggle 100 is placed on the subject's head 500, it applies good pressure to the headgear 200. This pressure secures the headgear 200, reducing the possibility of near-infrared light interference with the acquired signal, while ensuring that the pressure on the subject is not excessive and does not cause discomfort.
[0046] In some embodiments, the light-blocking goggles 100 can be configured to provide circumferential tension along the subject's head 500. Thus, when the light-blocking goggles 100 and the headgear 200 are worn together on the subject's head 500, the goggles body 300 and the fixing mechanism 400 can apply circumferential tension to the headgear 200 to secure it tightly against the subject's head 500. This allows the light-blocking goggles 100 to be worn more stably on the subject's head 500 and reduces the amount of light entering the headgear 200 through the gap between the forehead extension 210 and the forehead.
[0047] In some embodiments, the fixing mechanism 400 may include a strap structure 410. The strap structure 410 may be disposed on both sides of the goggle body 300. The strap structure 410 may be used to bind to any suitable tissue such as the subject's ears. The strap structure 410 has many advantages such as simple structure, easy adjustment of tightness, good breathability, easy operation, and low cost. In some embodiments, the strap structure 410 may be configured to be worn on the subject's ears and / or to wrap around the subject's head together with the goggle body 300. That is, the strap structure 410 may be simply attached to the subject's ears, or it may form a structure that wraps around the subject's head together with the goggle body 300. Alternatively, the strap structure 410 may be configured to both be attached to the subject's ears and wrap around the subject's head together with the goggle body 300. The fixing mechanism 400 makes it more convenient for the subject to wear the light-blocking goggle.
[0048] In some embodiments, the ends of the strap structures 410 on both sides away from the goggle body 300 (referred to as the rear ends) are detachably connected and, when connected, form a closed loop together with the goggle body 300. The strap structures 410 on both sides can be connected at any suitable location, such as behind or to the side of the subject's head. For example, each side of the goggle body 300 may include two strap structures 410, which are spaced apart vertically near the ends of the goggle body 300, extending from above and below the subject's ears to the back of the head, respectively. The two strap structures 410 can be brought together behind the subject's ears by means of, for example, a cable tie or by knotting, to prevent problems such as tangling due to excessively long single, highly flexible cords.
[0049] Exemplarily, the fixation mechanism 400 may further include a tightener 420 and a double-hook component 430. The strap structures 410 on both sides form a closed loop with the goggles body 300 on each side. The tightener 420 is disposed on each strap structure 410 and is movable along the strap structure 410. By moving the tightener 420 to a suitable position, the strap portion connecting the end of the strap structure 410 to the goggles body 300 (referred to as the front end) and the tightener 420 can form a front closed loop to be attached to the subject's ear. By moving the tightener 420, the size of the front closed loop can be controlled to accommodate different subject ear positions. The rear ends of the strap structures 410 on both sides can be hooked onto the two hooks of the double-hook component 430, facilitating connection and disconnection. Through the double-hook component 430, the strap structure 410 and the goggles body 300 can form a closed loop, encircling the subject's head circumference. With this design, the fixing mechanism 400 can be worn only on the subject's ears or around the subject's head circumference, thus meeting the wearing needs of different subjects.
[0050] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front", "back", "up", "down", "left", "right", "horizontal", "vertical", "horizontal", "top", and "bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.
[0051] For ease of description, relative terms such as "above," "over," "on the upper surface of," and "above" are used here to describe the regional positional relationship of one or more components or features shown in the figures to other components or features. It should be understood that relative terms include not only the orientation of the component as depicted in the figure but also different orientations during use or operation. For example, if the components in the figures are inverted as a whole, "above" or "above other components or features" will include cases where the component is "below" or "under" other components or features. Thus, the exemplary term "above" can include both "above" and "below." Furthermore, these components or features may also be positioned at other different angles (e.g., rotated 90 degrees or other angles), and this document intends to include all such cases.
[0052] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, parts, components, and / or combinations thereof.
[0053] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar subjects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.
[0054] This application has been described through the above embodiments. However, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit this application to the scope of the described embodiments. Furthermore, those skilled in the art will understand that this application is not limited to the above embodiments, and many more variations and modifications can be made based on the teachings of this application, all of which fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A light-blocking eye mask, characterized in that, The light-blocking goggles are worn on the subject's head in conjunction with a near-infrared brain functional imaging headgear. The light-blocking goggles include: The device includes a goggle body containing near-infrared light-blocking material and a fixing mechanism connected to the goggle body. The fixing mechanism is configured to secure the goggle body to the subject's head when worn. The goggles have an upper edge and a lower edge, and a pair of eye holes are provided. The upper edge includes a centrally located smooth portion, and the lower edge has a nose-avoiding recess in the middle. When the light-blocking goggles are worn on the subject's head and the subject's eyes are fully exposed through the eye openings, the upper edge extends across the subject's forehead in a natural or stretched state, and the smooth part is located at a first preset height above the highest point of the orbital bone on both sides of the subject, and the upper edge of each eye opening is located at a second preset height below the highest point of the orbital bone on the corresponding side of the subject.
2. The light-blocking eye mask according to claim 1, characterized in that, The first preset height is 5mm-30mm above the highest point of the orbital bone, and the second preset height is 3mm-35mm below the highest point of the orbital bone.
3. The light-blocking eye mask according to claim 1, characterized in that, The width of the narrowest part of the eye mask body around the eye holes is not less than 5mm.
4. The light-blocking eye mask according to claim 1, characterized in that, The width of the widest point between the top and bottom edges of the eye hole is not less than 18mm.
5. The light-blocking eye mask according to any one of claims 1-4, characterized in that, The light-blocking goggles are configured to provide circumferential tension along the subject's head.
6. The light-blocking eye mask according to any one of claims 1-4, characterized in that, The fixing mechanism includes strap structures located on both sides of the goggle body.
7. The light-blocking eye mask according to claim 6, characterized in that, The strap structure is configured to be worn on the subject's ears and / or to wrap around the subject's head together with the goggle body.
8. The light-blocking eye mask according to claim 7, characterized in that, The strap structure located on both sides of the eye mask body is detachably connected at the end away from the eye mask body, and after connection, it forms a closed ring together with the eye mask body.
9. The light-blocking eye mask according to any one of claims 1-8, characterized in that, The eye mask body containing near-infrared light-blocking material includes one layer or several layers arranged sequentially from the inside to the outside, wherein at least one layer is light-blocking velvet.
10. A near-infrared brain functional imaging headgear assembly, characterized in that, include: A near-infrared brain imaging headgear, wherein the headgear is provided with multiple probe mounting portions, and the headgear includes a forehead extension located in front of the probe mounting portions on the forehead; and According to any one of claims 1-9, when the near-infrared brain imaging headgear and the light-shielding goggles are worn together on the subject's head and the subject's eyes are fully exposed through the eye openings, the upper edge is circumferentially attached to the forehead extension of the near-infrared brain imaging headgear in a natural or stretched state, so that there is no exposed area between the forehead extension of the near-infrared brain imaging headgear and the goggles body of the light-shielding goggles.