43 results about "Eye safety" patented technology

The invention discloses a personalized myopia prevention and control single-spectrum irradiation optimization system, and the key points of the technical scheme are that the system comprises the following steps: 1, collecting basic data: collecting the individual basic data of a user, and enabling the individual basic data to reflect the inherent features of the eyes of the user and the basic state of myopia; step 2, collecting real-time associated data: collecting the real-time associated data of the user, wherein the real-time associated data reflects the myopia progress dynamic state of the user and a daily eye use scene; step 3, initial single-spectrum irradiation parameter generation: initial single-spectrum irradiation parameters adapted to the user are generated based on individual basic data and real-time associated data, and the initial single-spectrum irradiation parameters comprise irradiation wavelength, irradiation intensity, single irradiation duration and irradiation time period; 4, collecting eye safety data: executing single-spectrum irradiation according to the initial single-spectrum irradiation parameters, and collecting the eye safety data of the user in real time; the prevention and control effectiveness can be improved, and the individual difference problem is solved.

Presented are apparatus, systems and methods for creating tuned color emissions, from lighting and displays, that can be electronically controlled to select a desirable spectrum of wavelengths safer for human vision, for optimal color reproduction, for energy / brightness efficiency, and more. Apparatus including light emitting chips, materials, package design, electronic control devices and circuits, lights, light-fixtures, display panels, visual computing devices and systems, are disclosed. An embodiment is described which is capable of operating in modes, where eye-safe colors are rendered with minimal harmful wavelengths, as well as at least one mode of operation favoring color rendering, and brightness configurations. An embodiment is operable to deliver a paper-like black-on-white viewing experience, in both night-time and day-time operating modes, with reduced high-energy blue-wavelength light spectra. In one embodiment, the light-emitter, controller, display and system are operable to switch between these modes of operation.

The utility model discloses a projection lamp, including base, circuit board is installed in base, detection device is installed in base, and detection device is connected with circuit board electricity, and detection device includes transmitting end and receiving end, first light source subassembly is fixed in base, and with circuit board electricity is connected, projection subassembly is located the top of first light source subassembly, and includes projection sheet, transmitting end emits signal to projection sheet, and signal is reflected to receiving end through projection sheet, and detection device is in low level state at this time, when the user replaces projection sheet, receiving end does not receive the signal that reflects back, and detection device is in high level state, and circuit board reduces the brightness of first light source subassembly or extinguishes first light source subassembly according to the signal of detection device at this time, the utility model discloses take initiative anti -dazzle mechanism, and this mechanism response speed is fast, and the instantaneous glare irritation that avoids high brightness light source direct irradiation human eye causes, protects user eye safety.

A multi-fiber ferrule has lenses that have different prescriptions to disperse the light emitted from the multi-fiber ferrule. Alternatively, the lens for each individual optical fiber can be moved relative to the optical fiber or the optical fiber opening in the multi-fiber ferrule to cause the laser beam exiting the multi-fiber ferrule to be redirected into a structure that absorbs or blocks the laser.

Presented are apparatus, systems and methods for creating tuned color emissions, from lighting and displays, that can be electronically controlled to select a desirable spectrum of wavelengths safer for human vision, for optimal color reproduction, for energy / brightness efficiency, and more. Apparatus including light emitting chips, materials, package design, electronic control devices and circuits, lights, light-fixtures, display panels, visual computing devices and systems, are disclosed. An embodiment is described which is capable of operating in modes, where eye-safe colors are rendered with minimal harmful wavelengths, as well as at least one mode of operation favoring color rendering, and brightness configurations. An embodiment is operable to deliver a paper-like black-on-white viewing experience, in both night-time and day-time operating modes, with reduced high-energy blue-wavelength light spectra. In one embodiment, the light-emitter, controller, display and system are operable to switch between these modes of operation.

A LIDAR system includes a plurality of lasers that generate beams having FOVs. A plurality of detectors are positioned at a location where a FOV of at least one of the plurality of beams generated by the plurality of lasers overlaps a FOV of at least two of the plurality of detectors. A lens system collimates and projects the beams generated by the plurality of lasers. An actuator is coupled to at least one of the plurality of lasers and the lens system to cause relative motion between the plurality of lasers and the lens system in a direction orthogonal to an optical axis of the lens system in order to cause relative motion between the FOVs of the beams generated by the plurality of lasers and the FOVs of the detectors.

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.

The invention discloses a laser emission control method, device and equipment. The method comprises the following steps: emitting a first laser signal towards a first to-be-detected area along a first direction in a first detection time period of a laser ranging period; when a first echo signal generated based on the first laser signal is not received within the range time of the first laser signal, transmitting a second laser signal to a second to-be-detected area along the first direction in a second detection period of the same laser ranging period; and receiving a second echo signal generated based on the second laser signal, and when the second echo signal has the first signal characteristic, generating a target detection result at least according to the second echo signal. According to the invention, the emission time and the emission power of the emitted laser are modulated by setting the code distribution characteristics, so that the technical problem that the laser radar is safe to human eyes at a short distance can be effectively solved, the anti-interference capability of the laser radar is improved, the system power consumption is reduced, and the heat dissipation pressure is relieved.

A miniature vein enhancer includes: a housing, one or more movable mirrors, photo detector, and apparatus for transmitting a beam of light that includes a first and second wavelengths in the infrared and the visible spectrum, respectively. The one or more movable mirrors scan the beam onto the target surface. The photo detector is responsive to the first wavelength of light, and thereby receives a contrasted image formed of reflected light at the first wavelength from the target surface. The photo detector outputs an analog signal representing the contrasted image, which is used by the apparatus for transmitting a beam of light to project the contrasted image in combination with the one or more movable mirrors, onto the target surface. A plurality of protruding bars positioned in proximity to an exit window of the housing thereby prevent a user from placing an eye proximate to the optical path.

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.

A human tissue care device (1) comprises a plate-like light output member (25) having a contact surface (27) through which collimated care light (21) is transmissible to human tissue (41). An inner surface (29) of the light output member has a faceted optical structure (31). The geometry of the optical structure, the refractive index value (n1) of the material of the light output member and the average propagation direction (PAV2) of the care light received by the optical structure are such that the contact surface reflects the care light towards the optical structure by total internal reflection at a location not in contact with the human tissue and reflects the care light out of the light output member via the optical structure, and transmit the care light into the human tissue at a location of contact with the human tissue. A plate-like light redirecting member (53) having a faceted optical structure (61) may be arranged parallel to and adjacent to the light output member to redirect care light emitted by a light source (5) of the device to a mean propagation direction (PAV2).

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 provides a light generating system (1000) comprising N light generating devices (110,...), optics (500), M diffuser assemblies (1710,...), and a light exit (1090); wherein: - a first light generating device (110) is configured to generate first device light (111), comprising an emission band having a first emission peak wavelength (λp1); wherein the first device light (111) comprises light having a first linear polarization; a second light generating device (120) is configured to generate second device light (121) comprising an emission band having a second emission peak wavelength (λp2); wherein the second device light (121) comprises light having the first linear polarization; a third light generating device (130) is configured to generate third device light (131), comprising an emission band having a third emission peak wavelength (λp3); and wherein spectral power distributions of the first device light (111), second device light (121), and third device light (131) mutually differ; - a first diffuser assembly (1710) comprises a first polarization converter (711) and a reflective polarization maintaining first diffuser (712); wherein the first polarization converter (711) comprises a ¼λ retarder with a first wavelength λr1m of maximum retardance; wherein λr1m / 4 is selected from the range of (λp1 / 4 + λp2 / 4) / 2 ± 5 nm; the first diffuser assembly (1710) is configured to diffuse at least part of the first device light (111) and at least part of the second device light (121) received by the first diffuser assembly (1710) into first diffused device light (1711) comprising diffused first device light (111) and diffused second device light (121); and the optics (500) are configured such that at least part of the first diffused device light (1711) and the third device light (131) received by the optics (500) are directed to the light exit (1090); - the light generating system (1000) is configured to generate system light (1001); wherein in a first operational mode of the light generating system (1000) the system light (1001) is white light comprising the first diffused device light (1711) and the third device light (131).

The utility model relates to the field of range finders, in particular to a high-repetition-frequency human eye safety laser range finder. Comprising a range finder body, a display screen, a battery cover, a protection structure and an auxiliary structure, the display screen is installed on one side of the range finder body, the battery cover is fixed to the range finder body through the auxiliary structure, and the protection structure is arranged on the side face of the range finder body and comprises two fixing frames. The two fixing frames are fixedly connected to the two sides of the range finder body respectively, connecting blocks are slidably connected to the inner walls of the fixing frames, the same protective cover is fixedly connected to the upper surfaces of the two connecting blocks, and a fixing block is fixedly connected to one side of the protective cover. The high-repetition-frequency human eye safety laser range finder provided by the utility model has the advantages that the keys of the range finder body can be protected, the range finder body is prevented from being mistakenly touched in a pocket due to external factors, and meanwhile, a certain protection effect can be achieved.

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.

The invention relates to the technical field of management informatization, in particular to a risk management and control method and device based on a safety eye system and a readable storage medium. The method comprises the following steps: acquiring historical hidden danger data, and performing data clustering on the historical hidden danger data to determine cause elements; the historical hidden danger data is data collected by a safety system when a historical accident occurs; the cause factors represent cause factors causing historical accidents in the historical hidden danger data; establishing a Bayesian network model of a to-be-analyzed system, and determining hidden danger Bayesian network nodes; determining an accident probability and a hidden danger grading list of the hidden danger Bayesian network nodes according to the cause elements; and performing risk management and control on the to-be-analyzed system based on the accident probability and the hidden danger grading list. Through the method, certain analysis capability can be adapted to informatization risk hidden danger supervision and control, and intelligent analysis and risk grading are performed based on the risk hidden danger data.

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.

This document describes a time-of-flight lidar system configured to process pulse trains instead of individual pulses to improve range resolution and pixel throughput. Each pulse in a pulse train is output at a respective duration and intensity, which can vary to cause echoes with high intensity and low signal ambiguity, prevent heat buildup, or facilitate safe eye operation. An expected echo intensity as a function of time can be determined. By sampling reflections at the expected times and intensities, the lidar system can quickly identify corresponding lidar echoes despite lidar noise. Return times of the echoes can indicate distances or velocities associated with object pixels in a field of view. Processing pulse trains instead of individual pulses allows pixels to be scanned more quickly than using long duration or frame times, which also improves eye safety. The increased throughput is achieved using low-energy lasers and inexpensive hardware, which minimizes heat footprint.

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.

Method for controlling a lighting system, wherein the method comprises Retrieving, by a processor (120) and from a memory (134) of a lighting module (130), device information indicating properties of the lighting module (130), wherein the device information comprises (i) a plurality of parameters of a lighting element of the lighting module (130) and (ii) a maximum constant for the lighting element, wherein the maximum constant indicates a relationship between at least two parameters of the lighting element; Received from a user a desired parameter value for one of the parameters from the multitude of parameters; Determine, by the processor (120), a test constant from the desired parameter value; Determine, using the processor (120) and from the test constant and the maximum constant, that the desired parameter value is an acceptable parameter value; and Control of a power source by the processor (120) to provide electrical current to the lighting module (130) according to the desired parameter value; where the maximum constant also indicates a radiation risk group classification.

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.

The invention provides a light generating system (1000) comprising a first light generating device (110), a first depolarizing diffuser (410), a first polarizing beam splitter (PBS1), a first dichroic beam splitter (DBS1), a luminescent material (200), and a light exit (1090); wherein: (A) the first light generating device (110) is configured to provide first device light (111), wherein the first light generating device (110) comprises a laser light source; the light generating system (1000) is configured such that the first device light (111) reaching the first depolarizing diffuser (410) comprises polarized light having a first linear polarization; (B) the first depolarizing diffuser (410) is configured to diffuse at least part of the first device light (111) and change at least part of the polarized light having the first linear polarization into unpolarized light; (C) the first polarizing beam splitter (PBS1) is configured downstream of the first depolarizing diffuser (410) and is configured to direct the first device light (111) in dependence of its linear polarization (a) in an optical path to the luminescent material (200) or (b) in an optical path in a direction of the light exit (1090); (D) the luminescent material (200) is configured to convert at least part of the first device light (111) received via the first polarizing beam splitter (PBS1) into luminescent material light (201); (E) the first dichroic beam splitter (DBS1) is configured to receive luminescent material light (201) from the luminescent material (200) and to direct 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) at least comprising luminescent material light (201) and at least part of the first device light (111).

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.