74 results about "Vision Clear" patented technology

The invention provides a quick replaceable bronchoscope interventional operation robot. The quick replaceable bronchoscope interventional operation robot comprises a base, a bronchoscope structure, a driving device, a first supporting part and a second supporting part, the driving device is fixed on the base, one end of the bronchoscope structure is connected with the driving device, the first supporting part is connected with the bronchoscope structure, one end of the second supporting part is connected with the base, and the other end of the second supporting part is connected with the first supporting part; the bronchoscope structure comprises a bronchoscope which is arranged in a first supporting part in a penetrating manner; the shell is used for opening or closing the bronchoscope structure; a through hole is formed in the shell, is communicated with the bronchoscope and is used for introducing external normal saline into the bronchoscope. The bronchoscope structure is stably supported through the base, the first supporting part and the second supporting part, external normal saline can be introduced into the bronchoscope through the through hole in the shell, the bronchoscope can be flushed in time, it is guaranteed that the visual field of the bronchoscope is clear, and the precision and safety of an operation are improved.

The invention relates to the technical field of biopsy picking devices, and particularly discloses a gastrointestinal endoscope biopsy picking device which comprises a flexible outer tube. The fixing base is fixedly connected with the end part of the flexible outer pipe; the number of the clamp flaps is two, and meshing teeth are arranged on the sides, close to each other, of the two clamp flaps; the opening and closing mechanism penetrates through the flexible outer tube and is connected with the two clamp flaps; according to the gastrointestinal endoscope biopsy extraction device, the expansion mechanism expands through the trigger type air bag, so that the root of a deep plica is expanded outwards, a dead angle area which cannot be expanded through conventional air injection is fully exposed, a doctor does not need to manually control an endoscope to push the plica or adjust the angle, semi-blind operation is not needed, missed diagnosis of a hidden focus is avoided, and the operation efficiency is improved. After the plica is unfolded, the clamp flaps can be vertically attached to a focus mucous membrane, the staggered design of the meshing teeth ensures that a tissue sample is firmly fixed, the focus is automatically exposed through the expansion mechanism, the endoscope view is clear, the operation process is simplified, and the sampling failure rate is reduced.

The invention provides laminated glass, a projection system and a vehicle. The laminated glass comprises a first glass plate, a first bonding layer, a P light reflecting layer, a second bonding layer, a second glass plate and a P light anti-reflection layer which are sequentially stacked, the laminated glass is provided with an image display area, and the P light reflecting layer and the P light anti-reflection layer cover the image display area; the projection light comprises P polarized light, the internal reflection ratio RLp of the P light reflecting layer to the P polarized light with the incident angle of 70 degrees is larger than or equal to 40%, and the reflectivity of the P light anti-reflection layer to the P polarized light with the incident angle of 70 degrees is smaller than or equal to 2%. The P light reflecting layer and the P light anti-reflection layer are arranged in the laminated glass, and the projection light containing the P polarized light is adopted, so that the brightness ratio of the main image to the auxiliary image and the transmittance of the main image to the auxiliary image of the image display area can be improved, a bright main image is formed, a clear display image is obtained, the display effect of the display image is improved, the visual field outside a vehicle is clear, and the display effect of the vehicle is improved. And the visual experience of the user is improved.

The present application relates to the field of vehicle control, in particular to a cleaning control method and device for a rear windshield of a vehicle and the vehicle. The present application can gradually solve the defects of the prior art by detecting the cleaning state of the front windshield and synchronously controlling the rear windshield to perform corresponding cleaning. First, the vehicle cleans the front windshield, which itself reflects that the current environment is prone to fogging, frosting and other shielding problems. This is used as a trigger condition to automatically start the rear windshield cleaning, avoiding the problem of delayed vision caused by forgetting to turn on the rear windshield heating. Second, the cleaning mode of the front windshield is used to synchronously control the rear windshield, which can quickly match the demisting or defrosting demand and timely eliminate the fog and shielding of the rear windshield, ensuring a clear central rearview mirror vision when changing lanes and eliminating the safety hazards caused by poor vision. At the same time, the actual cleaning demand is used as the driving force to replace the indiscriminate fixed time operation, avoiding unnecessary continuous work and effectively reducing energy consumption.

The innovative aspirator head comprises a tubular handle and a working head part arranged at the front end of the tubular handle, an aspiration channel is formed in the tubular handle, the working head part is an integrally formed flat wedge-shaped aspiration head, and the aspiration channel is communicated with the aspiration channel. At least one suction hole communicated with the suction channel is formed in the stripping working surface; in the whole stripping process, wound surface errhysis is continuously sucked away through the suction holes, it is ensured that the operation view is clear, and the flat wedge-shaped head cannot pierce lung tissue due to the large contact area and the small pressure intensity; meanwhile, the flat wedge-shaped head is easy to insert into a gap, the pure flat blunt end ensures that the front end cannot be punctured, the clinical pain point that a traditional round-head aspirator is easy to poke into or tear fragile lung tissue is effectively solved, stable poking and separation of a fiberboard are achieved by increasing the stress area, and the safety and controllability of an operation are remarkably improved.

The utility model relates to the technical field of optical lenses, in particular to a miniature dot matrix contrast-reducing lens, which comprises a lens, the lens comprises a central optical area and a miniature dot matrix area, the miniature dot matrix area comprises two dot matrix structures, namely a large dot matrix with the diameter of 0.18 mm and a small dot matrix with the diameter of 20-30 microns, the number ratio of the large dot matrix to the small dot matrix is 1: 3-1: 8, and the number ratio of the large dot matrix to the small dot matrix is 1: 3-1: 8. The covering density of the dot matrix areas is 10-45%, the dot matrix spacing is 0.2-0.65 mm, the depth of the dot matrix is 2-8 microns, the edge of the dot matrix is provided with a smooth transition area of 0.05-0.1 mm, the lens further comprises micro-lens areas, and the micro-dot matrix areas and the micro-lens areas are alternately distributed. The central optical area of the lens is not covered by the dot matrix, so that clear view is guaranteed; the contrast of the dot matrix area is accurately regulated and controlled, full-view blurring is avoided, micro-lens defocusing and dot matrix contrast reduction are combined, eye axis growth is doubly inhibited, dot matrix size and interval optimization is achieved, and glare and visual interference are reduced.

This application provides a smoke-venting energy device and a surgical robot. The smoke-venting energy device includes an instrument housing assembly, a forceps assembly, and an instrument shaft. The forceps assembly includes an actuator, an insulating base, and a wrist joint; the instrument housing assembly has an instrument cable; the instrument shaft connects the forceps assembly and the instrument housing assembly, and the instrument cable passes through the instrument shaft and connects to the forceps assembly to drive the forceps assembly to perform surgical actions; a smoke-collecting component is disposed inside the instrument shaft to form a smoke-collecting chamber with the inner wall of the instrument shaft; the smoke-collecting chamber communicates with the smoke-collecting port and extends to the external surgical area, so that the smoke generated during the surgical actions enters the smoke-collecting chamber through the smoke-collecting port and is eventually discharged to the external surgical area, which can maintain a clear field of vision in the surgical area, which is beneficial for the doctor to accurately judge and operate the surgical area, and improve the continuity and safety of the surgery.

The invention relates to the field of dental pulp surgical instruments, and discloses a device for quickly cleaning diseased tissues around apical periodont.The device comprises a guide head, a scraping rod, scraping thorns, an adjusting rod, a main handle, an adjusting knob and an annular clamping groove; the guide head is fixed to the top end of the adjusting rod, the elastic scraping rods are evenly distributed along the circumference of the conical bottom of the guide head, the scraping thorns and the scraping rods are integrally formed, the scraping thorns are in a barb shape and evenly distributed in the length direction of the scraping rods, and the two ends of the scraping rods are connected with the conical bottom of the guide head and an annular clamping groove in the front end of the main handle respectively. And the adjusting knob is sleeved outside the main handle and is in threaded engagement with the adjusting rod. A linkage adjusting structure of the adjusting knob, the adjusting rod and the scraping rod and an elastic material are adopted, and the device can be contracted, unfolded and bent, so that the device is matched with a periapical bone cavity structure, periapical lesion tissues are thoroughly scraped and cleaned, the problems that a manual curette is poor in bone cavity adaptability and has a blind area are solved, the scraping efficiency is high, operation is standardized and safe, bone tissue damage is avoided, and the device is suitable for popularization and application. The cleaning effect is good and the view is clear.

The utility model relates to a kind of low material effective type simple neuroendoscope sleeve, including sleeve main body and the double-lumen catheter of insertion sleeve main body inside, sleeve main body front end is provided with arc section, double-lumen catheter includes coaxially arranged main cavity and annular auxiliary cavity, annular auxiliary cavity front end is connected annular air bag by hot-pressing, tail end is connected inflation device by luer joint, double-lumen catheter tail end outer wall is fixedly connected with limit ring, and sleeve main body is equipped with magnetic attraction type limiting mechanism between limit ring;Concentric double-lumen design ensures that operating channel is unobstructed, magnetic attraction type limiting mechanism realizes quick positioning, combined with the concentric unobstructed form after air bag inflation, form stable unobstructed operation space, ensure clear vision, and avoid repeatedly adjusting position;Meanwhile, pressure indicator real-time monitoring air bag pressure, multi-dimension reduces tissue damage risk.

This invention discloses a respiratory protective face shield, comprising a helmet and a face shield that allows visible light to pass through. The face shield is located on the front of the helmet and is movably connected to the helmet, allowing it to cover the wearer's face. A transparent electrically heated film is provided in the transparent area of ​​the face shield that allows visible light to pass through. The helmet is equipped with a power supply component for providing electrical power. The electrodes of the electrically heated film are electrically connected to the power supply component. An air inlet is located on the rear of the helmet for connecting to an air supply device. An air passage is provided inside the helmet, with one end connected to the air inlet and the other end extending to the front of the helmet and communicating with the space between the face shield and the wearer's face. This invention provides a respiratory protective face shield that can reduce water vapor on the inner surface of the face shield during wear, ensuring a clear field of vision for the wearer.

The invention provides an auxiliary retractor for laparoscopic surgery, and belongs to the technical field of medical instruments. Comprising a drag hook body, a notch is formed in an inner cavity of the top of the drag hook body, a suction opening is fixedly connected to the end of the drag hook body, and an L-shaped connecting frame is fixedly connected to the end of an inclined supporting frame; the supporting and stabilizing assembly is used for enhancing the stability of the drag hook body and tissues in the skin, and the supporting and stabilizing assembly is connected with the drag hook body. By arranging the supporting and stabilizing assembly, when making contact with tissue in the skin, the drag hook body makes contact with the supporting and stabilizing assembly, the drag hook body is lifted upwards and attached to the tissue in the skin, shaking of a doctor to the tissue in the skin during surgical operation can be relieved, the situation that tissue fluid is squeezed and overflows is reduced, and outflow of a large amount of tissue fluid is reduced; clear view during an operation is ensured, and operation hidden dangers caused by view problems are reduced.

The utility model relates to an underwater robot vision clear device which comprises an underwater robot body, a lens body is arranged on the right side face of the underwater robot body, a fixing ring is arranged on the periphery of the lens body, a protective cover is arranged in the fixing ring, and a cleaning assembly is movably installed outside the protective cover. According to the clear vision equipment for the underwater robot, through the arrangement of the filtering assembly, water can be further filtered through the arrangement of a first filtering layer, a second filtering layer, a third filtering layer and a fourth filtering layer, so that clean water enters the protective cover, and the situation that the observation effect of a lens body on objects in water is affected by turbid water is avoided; according to the cleaning assembly, a micro driving motor is started, and an output shaft of the micro driving motor drives a gear to be meshed with an outer gear ring, so that a rotating ring is driven to rotate, the rotating ring can further drive a cleaning plate to rotate, the UV lens is cleaned, and the observation quality of the lens body on an observed object is improved.

The utility model discloses a ureteral flexible mirror belongs to medical instrument technical field, including handle shell, one end of handle shell is rotatively connected with joint, the outside fixed connection of joint has mirror body sleeve, the other end fixed connection of handle shell has first channel pipe, the end of first channel pipe is communicated with first sheath pipe channel, first sheath pipe channel sets up inside handle shell, the inside fixed connection of handle shell has connecting block, and one end of first sheath pipe channel is inserted in the inside of connecting block, the utility model discloses a first channel pipe and second channel pipe are set up, better satisfy clinical treatment demand, when perfusion physiological saline maintains clear vision and operation space, another channel carries out operation, guarantees operation visual field clear, avoids the tissue damage because of visual field fuzzy, improves the operation convenience, solved the single problem of existing ureteral flexible mirror working channel.

The present application belongs to the technical field of medical auxiliary equipment, and discloses a speculum with a light source, which comprises a speculum body composed of two duck-bill or hawk-bill shaped upper and lower expansion pieces that can rotate around a pin shaft, a fixed ring and an extension part arranged at an observation window of the upper expansion piece, and the fixed ring is provided with a fixing assembly; the fixing assembly comprises a mounting seat rotatably connected to the fixed ring, a movable ring coaxially rotatably connected to the side surface of the mounting seat, an active block one and a plurality of circumferentially distributed active rods movably connected to the side surface of the mounting seat, a fixed block extending into the movable ring arranged at one end of the active rod, and an active block two movably connected to the movable ring and sleeved on the active rod; the active block one is rotatably connected to a threaded rod one, and the threaded rod one is sleeved with an active block three movably connected to the movable ring; the side surface of the mounting seat away from the movable ring is provided with at least two illuminating lamps, and the present application can realize 360-degree rotation of the speculum and always ensure that the field of view of the part to be examined is clear and visible.

This utility model discloses a multi-angle observation hysteroscopic device, relating to the field of medical equipment assistance. It includes a main body, a guide sheath, a front catheter, a rear catheter, an interface connector, control forceps, a cleaning channel, a control channel, a light source, a steering mechanism, a flexible lens, and a saline outlet. In this utility model, the doctor can simultaneously observe both sides of the uterine wall through flexible lenses A and B without reversing the device or frequently adjusting the angle, improving operational convenience. The steering mechanism allows for flexible control of the lens angle, further optimizing the field of view. The cleaning channel, through the saline outlet, removes secretions or haze from the observation area, ensuring a clear view. The light source provides uniform illumination through the front catheter, ensuring good brightness in the field of view. The control channel and steering mechanism work together to ensure the doctor can accurately control the lens direction, improving the accuracy of the examination.

The utility model discloses a gradient microstructure optical lens adapted to a simulated outdoor environment, which comprises a substrate and a microstructure layer, the microstructure layer comprises a lower high-density area, a middle transition area and an upper low-density area, the microstructure layer is provided with a plurality of uniformly distributed microstructures, and the microstructures are arranged on the substrate. The density of the microstructures is gradually reduced from the lower part to the upper part along the vertical direction of the lens, and the gradient change range of the density of the microstructures is that 2-5 microstructures are reduced per millimeter. According to the gradient microstructure optical lens adaptive to the simulated outdoor environment, targeted anti-dazzle is achieved, and the dense microstructures on the lower portion effectively restrain ground reflection light which accounts for more than 60% of an outdoor dazzle source; visual field definition optimization: the upper sparse arrangement reduces interference to a long-distance visual field; and ergonomic adaptation: the visual behavior characteristic that the downward watching proportion of human eyes is 70% during outdoor activities is met.

The present application relates to the technical field of gynecological examination, in particular to a gynecological clinical examination and diagnosis process field of view definition enhancement system and implementation method thereof. It includes: image acquisition and preprocessing unit real-time acquisition of gynecological examination process field of view image, and the field of view image is pretreated; feature extraction unit extracts key features from the field of view image after pretreatment; definition evaluation and optimization unit generates definition score based on key features, uses polarization difference image and polarization average image to decouple and correct feature interference caused by mucus scattering and tissue reflection, generates optimized definition score, and generates definition optimization parameters through multi-task learning model; field of view enhancement execution unit enhances the definition of field of view image based on definition optimization parameters. The present application carries out feature correction from the imaging physical mechanism, so that the definition score can more truly reflect the intrinsic details of the tissue, and provide reliable basis for subsequent accurate enhancement.

A handle structure (300) for an endoscope, and an endoscope. The handle structure (300) comprises a housing (310) and a first connector (320), wherein the housing (310) is provided with a mounting cavity (311); and the first connector (320) is configured for communication with a negative-pressure suction apparatus, one of the first connector (320) and a cavity wall of the mounting cavity (311) is provided with an engagement rib (312), and the other is provided with an engagement groove (321). Rotation of the first connector (320) causes the engagement rib (312) to be screwed into and engaged with the engagement groove (321), and a groove wall of the engagement groove (321) restricts the engagement rib (312) from moving in the axial direction of the first connector (320). By providing the mating engagement rib (312) and engagement groove (321) between the first connector (320) and the housing (310), when the engagement rib (312) is engaged with the engagement groove (321), the groove wall of the engagement groove (321) restricts the axial movement of the engagement rib (312), such that the likelihood of disengagement of the engagement rib (312) from the engagement groove (321) can be reduced, thereby solving the problem of a failed connection between the first connector (320) and the housing (310) resulting from the transmission of oscillating loads from a pipeline of the negative-pressure suction apparatus to the first connector (320) during surgery, improving the firmness of connection between the first connector (320) and the housing (310), improving the operational reliability of the negative-pressure suction function, and ensuring the clarity of the field of view at a surgical site.

A magnifier is the only product of its kind that offers a completely hands-free scope option that requires little to no adjustment after set-up. This unprecedented product is uniquely designed with high-grade magnifying lenses that cover large viewing areas, possesses durable LED lights to deliver operational excellence and glass strength ranging from 2 to 3× magnification to help with clarity for the viewer during utilization.

The invention provides laminated glass and a vehicle. The laminated glass comprises a first glass plate, a first bonding layer, an adjusting layer, a second bonding layer and a second glass plate which are stacked in sequence, the laminated glass has a light-transmitting visual field area, and the adjusting layer covers the light-transmitting visual field area in the stacking direction of the laminated glass; external light forms a transmission main image and a transmission auxiliary image, and the adjusting layer is used for adjusting the transmission auxiliary image. According to the laminated glass, the adjusting layer used for adjusting the transmission auxiliary image is arranged on the laminated glass, so that the transmission auxiliary image can be reduced or even eliminated, the transmission auxiliary image is almost invisible, the problem of auxiliary image deviation in a light-transmitting view field is solved, the view field of the laminated glass is clear and transparent, the driving safety is improved, and the service life of the laminated glass is prolonged. In addition, the image display effect of the light-transmitting display area can be improved, and the distinguishability of the shot image of the information acquisition area can be improved.

The application discloses a reversing rearview mirror suitable for all vehicle types and belongs to the technical field of transportation vehicle parts, and the technical scheme points of the reversing rearview mirror include a lens, a top curved surface formed at the top of the lens, and a bottom curved surface formed at the bottom of the lens; the surface of the lens is formed with two spherical curved surfaces, and the surface of the lens is formed with a side curved surface; the area of the top curved surface and the bottom curved surface each accounts for one fourth of the total area of the lens; the top curved surface is used for observing the blind area above and far behind the vehicle, the bottom curved surface is used for observing the blind area below and near the vehicle, and the side curved surface is used for observing the blind area near the side of the vehicle; the reversing rearview mirror can solve the problem that the existing conventional rearview mirror is mostly provided with a single-radian mirror surface, the field of view is limited, there is an obvious observation blind area, and the dual requirements of clear main field of view and peripheral blind area observation cannot be met simultaneously.

The application discloses a medical endoscope antifogging agent and application thereof, and belongs to the medical instrument field. The medical endoscope antifogging agent is composed of cellulose, a zwitterionic polymer, deionized water and ethanol, wherein the weight percentage of the cellulose is 0.001wt%-10wt%; the weight percentage of the zwitterionic polymer is 0.001wt%-10wt%; the weight percentage of the ethanol is 40wt%-90wt%; and the rest is the deionized water. The cellulose can form a film on the surface of the medical endoscope, and the zwitterionic polymer can resist the adhesion of biological components in the body. The medical endoscope antifogging agent combines the cellulose and the zwitterionic polymer, can play a long-time antifogging role, can significantly reduce the adhesion of biological components in the body to the endoscope, can keep the endoscope in the body with a high light transmittance during the operation, can keep the visual field clear during the operation, and can improve the operation accuracy. The application solves the technical problems that the existing medical endoscope antifogging agent has a short antifogging time and is easy to adhere to biological components in the body.

The utility model relates to the technical field of medical instruments, and discloses an expandable UBE working channel. Comprising a first dilation piece, a second dilation piece and an opening mechanism, the opening mechanism can drive the first dilation piece and the second dilation piece to be attached to form a first surgical operation space, and the opening mechanism can drive the first dilation piece and the second dilation piece to be separated to form a second surgical operation space; one end of the second dilation piece is provided with an overhanging part, and the overhanging part is connected with a traction part which extends towards one side of the second dilation piece and in the direction away from the first dilation piece. The UBE working channel can flexibly adjust the operation space in the operation process, the situation that paravertebral muscular tissue hinders operation tool entering and exiting and fusion cage implanting is effectively avoided, meanwhile, the water outlet smoothness is improved, and therefore it is ensured that the visual field under the endoscope is clear, and hydrops in muscle gaps are prevented. And the traction part on the second expansion piece can assist an operator in flexibly pulling nerves without assistance of an assistant, so that the safety and accuracy of an operation are improved, and the nervous tissues of a patient are protected.

The present application relates to the technical field of vehicles and discloses a wiper control method, a wiper control device and a vehicle.The wiper control method comprises the following steps: acquiring visual form features and impact pulse features of precipitation particles in a front windshield area of a vehicle, wherein the visual form features are used to represent the overall form and distribution law of the precipitation particles in the spatial and motion levels, and the impact pulse features are used to reflect the vibration change trend caused by the impact of the precipitation particles on the front windshield; determining a precipitation type based on the visual form features, the impact pulse features and real-time temperature features, wherein the real-time temperature features are used to describe the temperature influence of a driving environment on the front windshield area; and controlling the vehicle to execute a corresponding wiper control strategy based on the precipitation type.The present application can reduce the situation of over-frequent or untimely wiping, improve the visual clarity of the front windshield in bad weather, and thus enhance the driving safety and driving comfort.

The utility model discloses an opening ware with fixed aspirator function, include: opening ware main part, and the support opening department of opening ware main part is bent and is set up straight angle, tooth limit frame is connected in the end of opening ware main part support opening department, adjustable type fixing device, adjustable type fixing device detachable installation in the side of tooth limit frame, and adjustable type fixing device angle can adjust relative tooth limit frame, and adjustable type fixing device is used for fixed aspirator. The utility model discloses the setting mode of cooperation of tooth limit frame and adjustable type fixing device, not only has maintained the basic function of opening ware support opening oral cavity, still through adjustable type fixing device to fix the direction of suction pipe, has guaranteed the effectiveness of liquid suction, has kept the visual field clear of surgical area, and the design is simple, can reduce the operation step of surgical personnel, liberates both hands, has improved the convenience and efficiency of operation, has promoted the flexibility of operation.

The application discloses a low-temperature plasma bipolar loop snare with water dripping, which is characterized in that a ring-shaped water dripping cavity is arranged in the loop snare, and a water outlet is arranged at the head end of the loop snare, so that physiological saline can be continuously delivered to the working area of the electrode, and a low-temperature plasma layer is formed under the joint action of the electrode and the physiological saline, thereby realizing tissue cutting and blood coagulation and effectively reducing the range of tissue thermal injury; meanwhile, the water dripping system can cool the electrode and the target tissue, and flush the smoke and carbide generated in the cutting process, so that the endoscopic vision is kept clear; in addition, the application adopts a bipolar electrode structure, so that a current loop is formed between the electrodes, and a loop through the human body is not needed, thereby improving the electrical safety during the operation; through the above structural design, the application can ensure the tissue cutting efficiency, reduce the risk of perforation and improve the operation stability, and has good clinical application value.

The invention relates to the technical field of medical instruments, and discloses an air injection and saliva suction mouth mirror which comprises a lens seat, a handle, an air injection mechanism, an air suction hole and a saliva suction hole. A lens is arranged at the upper part of the lens seat; the handle is detachably connected with the lens seat, and an air blowing pipeline and a negative pressure pipeline are arranged in the handle. The air injection mechanism is arranged on the side, close to the handle, of the lens base, comprises a semi-annular cavity, an output gap, a partition plate and a micro-convex array and can generate a composite inclined air curtain covering the surface of the lens from-15 degrees to 0 degrees. The air suction holes are distributed in the opposite side of the air injection mechanism and directly communicate with the negative pressure cavity. A flexible one-way valve is arranged in the saliva suction hole, and the fluid resistance of the saliva suction channel is much larger than that of the air suction channel. The air curtain is formed on the surface of the lens and is efficiently recycled, so that fogging and pollution of the lens surface are effectively prevented, meanwhile, airflow escape stimulation is reduced, and the visual field definition, the operation efficiency and the comfort of a patient are remarkably improved.

The invention provides an invisible bifocal lens which is characterized in that the inner surface of the lens is an integrated lens composed of a low-beam area and a high-beam area, the high-beam area is a spherical surface or an ellipsoidal surface, the arc radius of the low-beam area is larger than that of the high-beam area, and the difference between the degree of the low-beam area and the degree of the high-beam area is 75-350 degrees. The optical center of the low-beam area is on or slightly lower than the central axis of the lens, and the optical center of the high-beam area is on or upper than the central axis of the lens. The double optical centers are provided, the appearance attractiveness is not affected while the view field is clear, and the double optical centers are suitable for automatic switching between long-distance watching and short-distance watching.

The invention provides a vehicle air curtain wind speed adjusting method and device and a vehicle machine system, and relates to the technical field of vehicle safety equipment.The method comprises the steps that firstly, under the condition that a vehicle is in a rainfall environment, rainfall information and driving information of the environment where the vehicle is located are obtained, and the vehicle is provided with an air curtain generating device; the air curtain generating device is used for forming an air curtain on a front windshield of the vehicle; secondly, based on the rainfall information and the driving information, control parameters of an air curtain generation device are determined; and finally, the control parameters are adopted to control the air curtain generating device so as to adjust the air speed of the air curtain generating device for forming the air curtain on the front windshield. It can be ensured that the air curtain can effectively cover the front windshield in various rainfall driving scenes, and the driving view definition and the driving safety in rainy days are remarkably improved.