24 results about "Eye safety" patented technology

The invention discloses an eyedrop box for ophthalmology treatment and a using method thereof, and relates to the technical field of eyedrops. The eyedrop box comprises an equipment body, a liquid medicine remaining amount judging assembly, a driving assembly, an identification and drilling linkage assembly and a control module. A storage bin is formed in the equipment main body and is provided with a sensor; the liquid medicine residue judgment assembly realizes visual judgment of the residue through linkage of a moving plate, a shielding cover and an identification rod; the driving assembly provides power for marking and drilling. The marking and drilling linkage assembly realizes'dye marking + drilling for preventing secondary filling 'of empty bottles and'only dye marking' of expired bottles through the rotating direction difference of a rotating disc; the control module controls all the assemblies to act through a PLC program. The problems that an existing eyedrop box cannot visually judge the remaining amount, has no expiration reminding function and has no empty bottle secondary filling prevention function are solved, eye safety risks can be avoided, and different user requirements are met.

The present application relates to an eye safety interlock for fiber coupled high power laser sources. A system is presented for continuously monitoring the integrity of the delivery fiber coupled to the laser source and shutting down the laser source immediately upon identifying any type of cut, break or disconnection along the delivery fiber. A pair of monitoring photodiodes are included with the laser source and used to observe the ratio of reflected light to emitted light, and if this ratio exceeds a given threshold, the laser is shut down. If there is a break, the power of the reflected light will be higher than normal, where a defined threshold is used to determine the calculated intensity indicative of the break. By using a measurement in decibels, the monitoring system only needs to employ the intensity difference to produce the reflected / delivery ratio output.

1. Name of the product in this design: Safety helmet with goggles. 2. Purpose of this design: To protect the head and eyes. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The invention provides a light generating system (1000) comprising a first light generating device (110), a luminescent material (200), a diffuser assembly (700), optical elements (500), and a light exit (1090), wherein; (A) the first light generating device (110) is configured to generate first device light (111); (B) the optical elements (500) comprise a first redirection optical element (1510) configured in a light-receiving relationship with the first light generating device (110); wherein the first redirection optical element (1510) is configured to (i) direct the first device light (111) in an optical path to the diffuser assembly (700), and to (ii) direct at least part of diffused device light (711) in an optical path to the luminescent material (200) (C) the diffuser assembly (700) comprises (a) a diffuser (710), wherein the diffuser (710) comprises a polarization maintaining diffuser, wherein the diffuser (710) is configured in the reflective mode; wherein the diffuser (710) is configured to diffuse at least part of the first device light (111) received by the diffuser (710) into diffused device light (711), wherein the diffused device light (711) has a full width half maximum of at least 5°; and (b) a quarter waveplate (720); wherein the light generating system (1000) is configured such that first device light (111) reaching the quarter waveplate (720) comprises linearly polarized light; wherein the quarter waveplate (720) is configured to convert linear polarized light received by the quarter waveplate (720) into elliptical polarized light and to convert elliptical polarized light received by the quarter waveplate (720) into linear polarized light; wherein the diffuser assembly (700) is configured to provide the diffused device light (711) in an optical path to the luminescent material (200) via the first redirection optical element (1510); (D) the luminescent material (200) is configured to convert at least part of the diffused device light (711) received by the luminescent material (200) into luminescent material light (201); (E) the optical elements (500) are configured to direct at least part of the luminescent material light (201) in an optical path to the light exit (1090); and (F) the light generating system (1000) is configured to generate in an operational mode of the light generating system (1000) system light (1001) comprising at least part of the luminescent material light (201).

This invention belongs to the field of medical device technology, and specifically relates to an integrated cold and hot compress eye mask for postoperative ophthalmic surgery. It includes an eye mask shell with a lower end designed as an arc shape conforming to the contours of the human face. An elastic strap for secure wearing is fixed to the outer side of the eye mask shell. The invention also includes two symmetrically arranged temperature equalization components on the eye mask shell, an adjustable component for driving the two temperature equalization components to move axially along the eye mask shell, a ring-shaped inflatable airbag, an air supply component, a PLC microcontroller, and a battery pack. This invention achieves uniform cold and hot compresses across the entire eye area through the temperature equalization components, precise adjustment of the compress pressure and intermittent slow-release care through the adjustable component, and airtight insulation and eye safety protection through the ring-shaped inflatable airbag and air supply component. Overall, it improves the nursing effect, comfort, and safety, and is suitable for the postoperative rehabilitation needs of various highly sensitive ophthalmic surgeries.

The invention discloses a television control method and device, a television and a readable storage medium, and belongs to the technical field of televisions.The television comprises a beautifying light source, a target picture is displayed on the television, and beautifying starting operation for the target picture is responded. Determining the target power of the beautifying light source according to the playing state of the multimedia on the television; the beauty light source is controlled based on the target power, the beauty function of the beauty instrument is integrated in the television, a user can perform beauty treatment while watching the television, the use frequency of the beauty function is improved, the beauty light source is controlled based on the playing state of multimedia, the light comfort of the environment where the user is located can be guaranteed, and the user experience is improved. And the eye safety of the user is ensured.

The invention relates to a vehicle (1) having a LiDAR sensor (5) which is positioned behind a windscreen (7) of the vehicle (1) in the vehicle interior (3), wherein the radiation (9) emitted by the LiDAR sensor (5) passes through a transparent surface of the windscreen (7). In a vehicle having a LiDAR sensor, in which the range of the LiDAR sensor can be increased without triggering hazards to persons in or outside the vehicle, the LiDAR sensor (5) emitting radiation (9) with a radiation power above a predefined eye safety threshold value is provided, for protection against exiting radiation, with a windscreen, (7) which comprises the LiDAR sensor (5) and is designed in the form of an encapsulation, and with an encapsulation housing (13) ending at the windscreen (7), which can be monitored by a monitoring unit (17) for a fault, in particular a mechanical destruction of the windscreen (7) and / or the encapsulation housing (13), wherein the monitoring unit (17) is coupled to monitoring electronics (19) controlling the LiDAR sensor (5) in order to detect a fault.

The utility model relates to the technical field of glasses frames, in particular to a myopia sun glasses frame with good fitting degree, which comprises a glasses frame, glasses legs, a detachable lens group and a detachable rubber component, the glasses legs are arranged at two ends of the glasses frame through hinges, notches are arranged at two inner ends of the glasses frame, and the detachable lens group is arranged on the glasses frame. The detachable rubber assembly is arranged on the inner side of the glasses frame, and the detachable lens group comprises lenses. By means of the assembly composed of the glasses frame, the glasses legs, the notches and the detachable rubber assembly, the sun glasses frame which is good in outdoor operation stability and capable of flexibly replacing the attaching face part is provided for myopia people, the use flexibility and the wearing safety are improved, the sun glasses frame is not prone to moving during outdoor activities or strenuous exercises, and the use safety of the myopia people is improved. And meanwhile, outdoor strong light is more effectively prevented from entering from a gap between the face and the glasses frame, and clear sight and eye safety of outdoor activities are ensured.

A light sheet microscope that combines the eye safety and economy of high etendue light sources like LEDs with the spatial resolution of low etendue light sources like lasers is proposed. Light emission from one or more high etendue sources is optically formed into light sheets whereby images of specimens illuminated by the light sheets provide spectral information. Light one or more low etendue light sources is formed into thinner light sheets to provide images with better spatial information. The light source wavelengths can be selected for improved eye safety. Image fusion synergistically combines the noteworthy spectral information captured from the high etendue light sheets with the exceptional spatial information captured from the low etendue sheet to create more informative images.

A hair-cutting head (10) for a hair-cutting device (100) having two sets (22, 24) of light sources which are configured to emit light predominantly in different respective wavelength bands. A first set (22) emits light in a wavelength band of 400-500 nm. A second set (24) emits light in a wavelength band of 500 nm and above. For improved eye safety, the first set of light sources is arranged so that its light output is projected onto the user's skin (23) during operation only via a central region (56) of a skin-contacting area (54) of the hair-cutting head (10). The second set (24) of light sources is arranged so that its light output is provided on the user's skin during operation only via a peripheral region (58) of the same skin-contacting area. This arrangement aims to make it more likely that the light of the first set (24) of light sources is fully shielded by the contact of skin to the hair-cutting head during normal operation, protecting the eyes from this light.

Eye safety and eye tracking accuracy is enhanced through pupil-aware eye tracking, where a fringe pattern projection or illumination onto the eye is locally dimmed in an area corresponding to the pupil. Fringe projection local dimming is accomplished by modifying (locally dimming) the fringe pattern at the projector. Illumination local dimming is accomplished at the light source (e.g., a laser source) before the light is provided by a micro-electromechanical system (MEMS) to the eye. An amount of light provided to non-pupil areas such as sclera may be increased to enhance a signal-to-noise ratio (SNR), which may lead to more accurate eye tracking.

The invention provides a light generating system (1000) comprising a first light generating device (110), a second light generating device (120), a luminescent material element (2000), and optics (500): the first light generating device (110) is configured to generate first device light (111); the luminescent material element (2000) comprises a luminescent material (200); wherein the luminescent material (200) is configured to convert at least part of the first device light (111) received by the luminescent material element (2000) into luminescent material light (201); wherein in at least part of a first luminescence wavelength range (λLR1) and in at least part of a second luminescence wavelength range (λLR2) the luminescent material light (201) has spectral power; the second light generating device (120) is configured to generate second device light (121); and the optics (500) comprise redirection elements (510,520,530). With such it is possible to combine beams of spectrally different types of light while minimizing loss of spectral intensity in overlapping spectral ranges.

The application relates to an eyepiece lens, which comprises a first lens (L1) with positive refractive power, a second lens (L2) with positive refractive power, a third lens (L3) with negative refractive power and a fourth lens (L4) with positive refractive power arranged in sequence along an optical axis from an object side to an image side; the first lens (L1) is a convex-convex lens or a convex-concave lens; the second lens (L2) is a convex-concave lens; the third lens (L3) is a concave-concave lens; and the fourth lens (L4) is a convex-convex lens. The eyepiece lens has a feature that an exit pupil distance reaches 45 mm and a back focal length BFL is greater than or equal to 6.5 mm, which leaves sufficient working distance for eye safety under the premise of meeting diversified use scenarios, reserves space for assembly and focusing of optical elements, and avoids mechanism interference to affect the performance of the eyepiece lens.

A method for operating a LiDAR system, in particular for operating a LiDAR system of a vehicle, a software, a LiDAR system, a driver assistance system and a vehicle are de- scribed. In the method at least one electromagnetic scanning signal is sent into a moni- toring area by use of at least one transmitting device of the LiDAR system. At least one receiving element of a receiving device of the LiDAR system is activated to receive elec- tromagnetic echo signals, if any, that originate from electromagnetic scanning signals that are reflected in the monitoring area. Electric charge (eA, eB) of the at least one receiving element that is generated by the received electromagnetic echo signals is accumulated. After at least one predetermined time interval the accumulated electric charge (eA, eB) of the at least one receiving element is compared with at least one predetermined eye- safety-charge-threshold (Theye). If the comparison shows that the at least one accumu- lated electric charge (eA, eB) has reached the at least one eye-safety-charge-threshold (Theye), an eye safety procedure is performed.

The invention provides a grape vine precise pruning method and device based on laser cutting, and relates to the technical field of agricultural intelligent equipment. The method comprises the steps that the size and the water containing state of a target branch section are obtained, and the laser output power and the cutting speed are determined, constrained and corrected through the pre-established mapping relation between the branch state and laser cutting parameters; a shearing area is constructed in the three-dimensional space, and trunk and bud eye safety distance constraint is applied; further planning a motion track and a posture change sequence of a laser cutting head based on a shearing area constraint and a posture control model, and generating a posture control instruction to drive an execution mechanism to complete automatic laser shearing, so as to realize accurate protection of a grape vine trunk and a bud eye to be reserved and stable and consistent shearing quality. The problems that in the prior art, pruning precision is insufficient, shearing parameters are difficult to adjust in a self-adaptive mode, and shearing mouth quality and plant health are difficult to consider at the same time are solved.

The invention discloses a 3D material level measuring device and method based on quantum single photon detection, and belongs to the technical field of industrial measurement. The device comprises a single-photon transmitting and receiving unit, a light beam deflection motion unit, an integrated control module, an optical auxiliary assembly and a data output unit, a single-photon transmitting module covers a 1310-1550 nm human eye safe wave band, and a detection module is compatible with various single-photon-level devices such as a gated avalanche photodiode and a silicon photomultiplier. The light beam deflection motion unit can be a high-speed galvanometer, an electric holder or a combination of the high-speed galvanometer and the electric holder, the optical auxiliary assembly achieves interference resistance through light filtering, light splitting and light isolation, the integrated control module adopts an industrial master control chip and supports 0-80 m material level measurement and historical data local storage, and the data output unit is provided with 4-20 mA analog quantity and an RS485 Modbus protocol in a standard mode. 4G / 5G and Ethernet communication modules can be expanded and selected. According to the method, through the steps of synchronous triggering, global scanning, multi-stage anti-interference signal processing, three-dimensional point cloud reconstruction and data output, high-precision measurement of the material level height + / -2 mm to + / -8 mm within the range of 0-80 meters is achieved, and the volume calculation error is smaller than or equal to 0.8%. The technical problems of single-point measurement, weak anti-interference and existence of blind areas of a traditional level gage are solved, and the level gage is suitable for complex working conditions such as coal mines and chemical engineering, wide in protection range and remarkable in popularization value.

The invention discloses a method and system for forming a limited state space of non-random optical distribution for the face of a user, and the method comprises the steps: enabling the system to be in a wearing state, and enabling the system to be in a fixed wearing geometrical relationship with the eyes of the user; under the combined action of the relative space position between the light source and the face and the eyes of the user, the light emitting direction limitation and the eye safety constraint, the face optical distribution formed by the system is inevitably limited in a limited optical distribution state space. According to the invention, by selecting, adjusting or maintaining the spatial directivity, the intensity distribution, the time characteristic or the spectral composition of the optical radiation in the optical distribution state space, the optical radiation acts on at least two spatially distinguishable face areas of the face in a non-random manner; a stable, repeatable and non-random relative optical relationship is formed between the regions. Cooperative regulation and control of multiple face areas are achieved, and the problems that in the prior art, optical distribution has no clear constraint, potential safety hazards are likely to be caused, and adaptability is poor are solved.

Described herein are LIDAR systems that dynamically enhance a complex shape region of interest in a field of view (FOV) using a micromirror array. Also described herein are LIDAR systems that generate low-intensity (e.g. eye-safe) laser pulses in a protective guard region (e.g. a guard ring) that surrounds the high-intensity laser pulses to adapt or steer an angular range of the high-intensity laser pulses to avoid an object detected within the low-intensity guard region.

A method for operating a LiDAR system, in particular for operating a vehicle's LiDAR system, software, a LiDAR system, a driver assistance system, and a vehicle are described. In the method, at least one electromagnetic scanning signal is sent into a monitoring area using at least one transmitting device of the LiDAR system. At least one receiving element of a receiving device of the LiDAR system is activated to receive electromagnetic echo signals, if any, originating from electromagnetic scanning signals reflected in the monitoring area. Electric charge (e A , e B The electrical charge (e) of at least one receiving element, generated by the received electromagnetic echo signals, is accumulated. After at least a predetermined time interval, the accumulated electrical charge (e) is discharged. A , e B) of at least one receiving element with at least one predetermined eye-safe charge threshold (Th eye ) compared. If the comparison shows that at least one accumulated electric charge (e A , e B ) which has at least one eye-safe charge threshold (Th eye Once an eye safety procedure has been performed, the eye safety procedure will be carried out.

A display for displaying an image to a viewer includes an image generator having an illumination subsystem generating illumination of at least a first color, the image generator employing the illumination to generate an image. Projection optics projects illumination from the image for display to the viewer. The illumination subsystem includes a first laser generating a first laser beam of the first color with a first polarization and a second laser generating a second laser beam of the first color with a second polarization. The first and second polarizations are orthogonal at at least one location within the projection optics, thereby projecting a quasi-unpolarized image.

The invention relates to a vehicle (1) with a lidar sensor (5) positioned behind a windshield (7) of the vehicle (1) in the vehicle interior (3), wherein the radiation (9) emitted by the lidar sensor (5) passes through a transparent surface of the windshield (7). In a vehicle with a lidar sensor, the range of the lidar sensor can be increased without endangering persons in or around the vehicle.To prevent the lidar sensor (5), which emits radiation (9) with a radiation power above a predetermined eye safety threshold, is provided with a capsulation (13) encompassing the lidar sensor (5) and sealing against the windshield (7) to protect against escaping radiation. This capsulation (13) can be monitored by a monitoring unit (17) for a malfunction, in particular a mechanical destruction of the windshield (7) and / or capsulation (13). The monitoring unit (17) is coupled to monitoring electronics (19) controlling the lidar sensor (5) for the purpose of detecting a malfunction.

The body tissue treatment device 1 includes a plate-shaped light output member 25 having a contact surface 27 through which collimated treatment light 21 can be transmitted to body tissue 41. An inner surface 29 of the light output member has a faceted optical structure 31. The shape of the optical structure, the refractive index value n1 of the material of the light output member, and the mean propagation direction PAV2 of the treatment light received by the optical structure are such that, in positions where the contact surface is not in contact with the body tissue, the treatment light is reflected from the light output member toward the optical structure by total internal reflection, and, in positions where the contact surface is in contact with the body tissue, the treatment light is transmitted to the body tissue. A plate-shaped light redirection member 53 with a faceted optical structure 61 can be arranged parallel to and adjacent to the light output member to redirect the treatment light emitted by the device's light source 5 in the mean propagation direction PAV2.

A light sheet microscope that combines the eye safety and economy of high etendue light sources like LEDs with the spatial resolution of low etendue light sources like lasers is proposed. Light emission from one or more high etendue sources is optically formed into light sheets whereby images of specimens illuminated by the light sheets provide spectral information. Light one or more low etendue light sources is formed into thinner light sheets to provide images with better spatial information. The light source wavelengths can be selected for improved eye safety. Image fusion synergistically combines the noteworthy spectral information captured from the high etendue light sheets with the exceptional spatial information captured from the low etendue sheet to create more informative images.