27results about How to "Reduce light" patented technology

The invention provides an optical lens. The optical lens comprises a lens barrel, and a lens group and a spacing element group which are assembled in the lens barrel, wherein the lens group sequentially comprises a first lens, a second lens, a third lens and a fourth lens from an object side to an image side along an optical axis; the spacing element group at least comprises a third spacing element; the third spacing element is positioned between the third lens and the fourth lens and is in contact with the object side surface part of the fourth lens; the effective focal length f of the optical lens, the effective focal length f3 of the third lens and the effective focal length f4 of the fourth lens meet the condition of 0.40 lt; f3 / f + f4 / f < = 0.75; the combined focal length f34 of the third lens and the fourth lens, the inner diameter d0m of the end face, closest to the image side, of the lens barrel and the inner diameter d3m of the image side face of the third spacing element meet the following formula:-0.05 lt; (d0m-d3m) / f < 34lt >; and 0.05%. The problem that stray light is serious due to the fact that an optical lens in the prior art meets the long-focus requirement is solved.

The invention relates to the technical field of dustproof cleaning, in particular to an engineering project site dustproof cleaning device which comprises a shell, the side wall of the shell is fixedly connected with an air pump through a support, and an input pipe of the air pump is fixedly connected with the shell in a penetrating mode; a cleaning mechanism is arranged in the shell and composed of an airflow assembly, a dust falling assembly and a control assembly, the airflow assembly comprises an air channel and a dust falling cavity, the dust falling cavity is formed in the shell and communicated with the outside through the air channel, and an input pipe of the air pump penetrates and extends into the dust falling cavity. The shell is rotationally connected with a rotating shaft in a penetrating mode through a bearing, the dust falling assembly comprises two side cavities and a water cavity, and the side cavities and the water cavity are both formed in the shell. The device disclosed by the invention has the advantages that the device can avoid the severe field environment and the waste of water resources while spraying and settling dust, and meanwhile, the spraying and settling speed can be automatically adjusted, so that the automation degree is higher.

The invention discloses a weed-inhibiting green manure seed bag and application thereof, and relates to the technical field of agricultural planting, the weed-inhibiting green manure seed bag comprises S001 hybrid wild soybean for both grass and seeds and Ninong S002 feeding soybean, and the mass ratio of the Ninong S002 feeding soybean to the S001 hybrid wild soybean for both grass and seeds is (6.5-7.5): (2.5-3.5); the registration number of the variety of the S001 hybrid wild soybean for both grass and solid is N021, and the registration number of the variety of the Ninong S002 feed soybean is N071; the green manure seed bags are matched with crops for sowing to help the crops to inhibit weeds; compared with a traditional chemical weeding method, the method has the advantages that the use of chemical herbicides is avoided, so that the risks of soil pollution and ecological balance damage are reduced.

The invention relates to a display system which comprises a display assembly and an optical assembly, the display assembly comprises at least one first display area and at least one second display area, the first display area emits first circularly polarized light, and the second display area emits second circularly polarized light. The rotation direction of the first circularly polarized light is different from that of the second circularly polarized light; the optical assembly is arranged on the light emitting side of the display assembly, and the optical assembly is configured to reflect the first circularly polarized light and transmit the second circularly polarized light. The display system can improve readability and resolution of information displayed by a head-up display (HUD) system, and improve influence of ambient light in a bright environment on the display effect of the whole HUD system.

The application relates to the technical field of teaching instruments, and discloses an interactive teaching instrument and a use method thereof, which comprise a supporting assembly, the top of the supporting assembly is provided with a fixing assembly, the top of the fixing assembly is provided with an adjusting assembly, one side of the adjusting assembly is provided with a display assembly, the display assembly is provided with a light-shielding assembly, the supporting assembly comprises a base, pressure sensors are arranged at the lower ends of the four corners of the base, the fixing assembly comprises a fixing plate, the adjusting assembly comprises a rotating motor arranged at the bottom of the fixing plate, the application can flexibly adjust the angle position, effectively reduce the reflection, avoid affecting the teaching effect, actively remove dust from the display component, improve the display definition, timely intervene when the whole is in an unstable state, improve the stability of the whole, effectively protect the display component when the whole is tilted, and prevent the display component from being damaged.

The present invention discloses a time difference culture device, which relates to the technical field of biological tissue culture; the time difference culture box is adapted to be equipped with a light source assembly, an observation assembly and a gas supply system; the light source assembly includes a first light focusing part, a light decaying sheet is arranged on the light incident side of the first light focusing part, and the light decaying sheet is provided with a plurality of light transmitting parts in sequence along the length direction of the light decaying sheet, and the light transmittance of the plurality of light transmitting parts increases in sequence along the length direction of the light decaying sheet; the observation assembly includes a microscope camera and a linear drive mechanism; the gas supply system includes a first pressure switch, a first reversing pressure relief valve and a first gas storage tank, the first pressure switch is used to monitor the air pressure in the time difference culture box and control the action of the first reversing pressure relief valve, and the outlet of the first gas storage tank is connected to the inlet of the first reversing pressure relief valve after passing through a pressure reducing valve. The present invention can ensure the clarity of the captured image, and the image has a three-dimensional sense and a sense of hierarchy, so as to accurately judge the morphology of biological tissues and ensure the accuracy of biological tissue evaluation, analysis and screening.

The invention relates to a loading and unloading operation efficiency identification method and device. The method is applied to the loading and unloading operation efficiency identification device. The device comprises a control module, a detection module, a timing module and a power supply module. The detection module is worn by a target object and comprises a vital sign recognition sub-module, a positioning detection sub-module and a motion detection sub-module which are used for obtaining vital sign parameters of the target object, the distance between the target object and a target vehicle and motion parameters. Specifically, each sub-module responds to a first target instruction, and each sub-module obtains a corresponding parameter; the control module judges whether the target object is in a preset working state or not based on the parameters so as to control starting and stopping of the timer; in response to the second target instruction, the sub-module stops working, and the timer sends a result to the control module; the control module identifies the loading and unloading operation efficiency of the target object according to the timing result. By detecting the vital signs, the position and the action of the target object in real time, the effective working time is accurately recorded, and the recognition accuracy of the working efficiency is improved.

The invention discloses a medical orthopedic annular casing drill, and relates to the field of medical equipment, a drill bit is provided with an inclined cutting assembly, and chip removal assemblies are arranged between a drill body and the drill bit; the inclined cutting assembly comprises a tool face, a first auxiliary rear tool face, a second auxiliary rear tool face, a first main rear tool face, a front tool face and a second main rear tool face, wherein the first main rear tool face and the front tool face intersect to form a main cutting edge; the chip removal assembly comprises an inner cavity, an inner cavity face, an inclined opening and a vent hole, the inner cavity is formed in the drill bit, the inner cavity face is obliquely arranged in the inner cavity, and the inclined opening matched with the inner cavity face is formed in one end of the vent hole. The cutting edge inclination angle ensures the sharpness of the drill bit, the axial relief angle is formed by the reference plane included angle formed by the main cutting edge and the central axis of the drill body, the situation that a tool nose is broken due to large cutting resistance is effectively prevented, and fine bone chips generated during drilling are discharged through vacuum chip suction.

The present invention provides a high-reflection LED flip chip and a manufacturing method and packaging structure thereof. The present invention reduces the distance between contact electrodes, adds a second transparent insulating layer, and opens welding holes on the second transparent insulating layer so that the welding spacing remains unchanged, which can not only greatly improve the chip's external quantum efficiency, but also reduce the light output from the side and electrode surface, thereby effectively improving the brightness without changing the packaging form. The problem of low light output efficiency caused by the large distance between contact electrodes in the prior art is solved.

The invention relates to an agricultural soilless vegetable cultivation device. The agricultural soilless vegetable cultivation device comprises a cultivation box, a bearing frame, an observation mechanism, a nutrition supply mechanism and a control table, the cultivation box is provided with a cultivation cavity and an illumination receiving opening, the bearing frame is arranged in the cultivation cavity, and a plurality of supporting column cultivation plates and a driving mechanism are arranged on the bearing frame; the driving mechanism drives the plant cultivation plate to circularly pass through the illumination area, the observation area and the nutrition supplementing area on the bearing frame; the observation mechanism is arranged in an observation area and captures image information of plants in real time, the nutrition supply mechanism is arranged in a nutrition supplement area and provides nutrition mixed liquid for the plants passing through the nutrition supplement area, and the observation mechanism and the nutrition supply mechanism are electrically connected with the control console. And the image information is received and the nutrient supply mechanism is controlled to adjust the concentration of the nutrient mixed solution, so that the growth condition of the plant in the device can be observed in real time, the growth environment of the plant can be adjusted in time, and the normal growth of the soilless culture plant is ensured.

an objective is to provide an optical element which has no discontinuous portion between adjacent lenses, and which suppresses a reduction of a light efficiency and also an occurrence of variability in light distribution due to diffusion, etc. An optical element capable of diffusing incident light to a predetermined diffusion range, and includes a transparent body including concavity-and-convexity on at least one surface. The diffusion range is defined as an internal side of a singular closed curved line on a predetermined plane. The concavity-and-convexity includes a plurality of crests and valleys without a periodicity. When it is defined that a wavelength of the light is λ, a refractive index of the transparent body is n1, and a refractive index of a medium around the transparent body is n0, the concavity-and-convexity has no portion where a gradient of the concavity-and-convexity changes by 180 degrees within a range in which a width is λ / (n1 - n0). A region of the concavity-and-convexity with the gradient causing the incident light to be emitted and outgo to a region outside the diffusion range by Snell's law is equal to or smaller than 5 % of the entire region.

The utility model relates to the technical field of data display equipment, and discloses GIS two-dimensional and three-dimensional integrated data display equipment which comprises a display screen, the front face of a connecting block is fixedly connected with a rotating shaft, the front end of the rotating shaft is rotationally connected with a blocking box, and the middle of the back of the blocking box is fixedly connected with an inserting block. First springs are connected to the upper side and the lower side of the inner wall of the inserting block, limiting blocks are connected to the top ends of the first springs, the top ends of the limiting blocks are hemispherical, a shielding plate is rotatably connected to the top of the display screen, and a telescopic plate is slidably connected to the inner wall of the front face of the shielding plate. Sunlight is difficult to reflect to the surface of the display screen by adjusting the positions of the telescopic plate and the blocking box, so that light reflected by the display screen is reduced, a worker can clearly check data on the display screen, the blocking box can be adjusted to the bottom of the display screen to be used for placing articles, and the display screen is convenient to use. Therefore, the effects of shielding sunlight and conveniently placing articles are achieved.

The invention relates to the technical field of food processing, and discloses a method for delaying color fading of beef tallow hotpot condiment red oil, which comprises the following steps: step 1, selecting an antioxidant and beef tallow: compounding 0.1-0.2% of VE (Vitamin E) and 0.02-0.03% of rosemary to form a composite oxidant; 0.1%-0.2% of TBHQ is added into the beef tallow; step 2, pre-dissolving the composite antioxidant: pre-dissolving the composite antioxidant in beef tallow oil at a mass ratio of the composite antioxidant to the beef tallow oil of 1: (30-50) at a dissolving temperature of 70-100 DEG C; step 3, adding the pre-dissolved composite antioxidant into the beef tallow and red oil product to be treated, and uniformly stirring; and step 4, using an aluminum film bag for light-proof low-oxygen permeability preservation. While the color fading of the red oil hotpot condiment is effectively prevented, the flavor and taste of the hotpot condiment can be ensured not to be influenced.

A water quality sensor (1) includes a light source (31), a beam splitter (33), a first detector (34), a second detector (35), and a measurement space (24). The beam splitter (33) splits light emitted from the light source (31) into transmitted light and reflected light. The first detector (34) detects the transmitted light. The second detector (35) detects the reflected light. The measurement space (24) is filled with a sample of liquid. Of an optical path along which light propagates from the light source (31) to the first detector (34), a portion extending through the measurement space (24) is defined as a first optical path (L1). Of an optical path along which light propagates from the light source (31) to the second detector (35), a portion extending through the measurement space (24) is defined as a second optical path (L2). The optical path length of the second optical path (L2) differs from the optical path length of the first optical path (L1).

The present application provides an integral carbide forming milling cutter with a secondary chip groove, which includes a working part and an optional connecting part for directly or indirectly connecting to a machine tool, wherein the cutting edges each independently have a rake face, a flank face, and a cutting edge formed by the intersection of the rake face and the flank face, wherein the rake face forms a first rake angle at each location of the cutting edge, and is characterized in that a secondary chip groove is provided on the rake face, wherein the secondary chip groove extends in the length direction along the direction of the cutting edge, and wherein the secondary chip groove has a groove surface close to the cutting edge, so that the groove surface of the secondary chip groove close to the cutting edge forms a second rake angle, and the second rake angle is greater than the corresponding first rake angle. The present application forms a sharp and large rake angle of the cutting edge by providing a secondary chip groove to form a second rake angle, thereby converting a negative rake angle into a positive rake angle, thereby greatly improving cutting efficiency, reducing cutting resistance, and extending tool life.

The utility model discloses an MPPT charging and discharging controller with low voltage input. The MPPT charging and discharging controller comprises a central controller, a charging module, a power supply module, a Bluetooth module, a power management module and a boost constant current module, different input terminals of the central controller are respectively connected to the charging module, the power supply module, the Bluetooth module, the power management module and the boost constant current module for data acquisition, and different output terminals of the central controller are respectively connected with control terminals of the charging module, the power supply module, the Bluetooth module, the power management module and the boost constant current module for data acquisition. And controlling the working mode of the module. A plurality of multi-bit analog-digital conversion channels are arranged in the central controller and used for executing analog-digital conversion on input signals detected by different input terminals of the central controller.

The present disclosure provides a backlight unit and a display device including the same. The backlight unit includes: a first substrate; a plurality of light sources arranged on one surface of the first substrate; a first reflective film arranged on one surface of the first substrate, including a first opening portion exposing each of the light sources; and a plurality of wavelength filter layers arranged on the first reflective film, corresponding to the first opening portion, the plurality of wavelength filter layers are arranged spaced apart from each other, and each wavelength filter layer covers at least one of the first opening portions.

The present invention relates to the technical field of appearance detection, and discloses a detector for hardware appearance detection, including a main body, a square groove is provided on the top of the main body, two rectangular grooves are provided inside the main body, the two rectangular grooves are symmetrically distributed with the square groove as the center, and a support plate is fixedly connected to the top of the main body. When the telescopic shaft moves downward, the present invention will bring the sleeve down a distance through the obtuse plate, and then the telescopic shaft moving downward will pass through the swing rod, so that the swing rod changes from an inclined state to a horizontal state, and in this process, the swing rod will also rotate around the connection between the obtuse plate and a sliding ring as the center, and when the swing rod becomes straight, the obtuse plate will be expanded to block the detected part, reduce the external light that may interfere with the appearance of the hardware, cause misjudgment or missed detection, and reduce the interference of external light through the sunshade mechanism, so that the detection result is more accurate.

The invention relates to a 3D display technology, in particular to a high-extinction-ratio linear polarization Micro-LED and a preparation method thereof.The high-extinction-ratio linear polarization Micro-LED comprises an unetched area and a table top, silicon dioxide passivation layers are deposited on the top of the unetched area, the outer side wall of the table top and the top of the table top, and the silicon dioxide passivation layers are deposited on the outer side wall of the table top and the top of the table top. According to the invention, the silicon dioxide passivation layers are deposited on the top of the non-etched area, the outer side wall of the table top and the top of the table top, and then the avoiding step is formed on the periphery of the top of the table top after silicon dioxide passivation, so that the top of the ITO layer is covered with the silicon dioxide passivation layer; according to the invention, the preparation of the silicon dioxide transition layer is completed without an additional process, and the layer of silicon dioxide can also play a role of an antireflection film, so that the light transmittance is increased, and the luminous efficiency of the linearly polarized Micro-LED is improved.

This light-emitting device is provided with: a proximity detecting light source that oscillates in a single horizontal mode; a 3D shape measuring light source that has a great optical output than the proximity detecting light source, configured so as to drive independently from the proximity detecting light source and oscillates in a multiple horizontal mode; and a diffusing plate provided on the emitting path of the 3D shape measuring light source.

The invention relates to the technical field of optical communication, in particular to an optical output turn-off control method and system based on the silicon optical technology and an optical module.The method comprises the following steps that when an optical output turn-off instruction is received, temperature information is obtained; indexing from the lookup table according to the temperature information by using a linear interpolation algorithm to obtain a preset voltage value; and controlling the working voltage of the heater based on the preset voltage value, and closing modulation signal output of the target channel. The working voltage of the heater in the silicon light modulator is set according to temperature linear interpolation, modulation signal output is closed to reduce emergent light, control over single-channel emergent light can be achieved, extra hardware cost does not need to be increased, power consumption and control complexity during light output turn-off are effectively reduced, and influences on other channels can be reduced.

This invention relates to a method and system for controlling rear ambient lighting in vehicles, and a computer-readable storage medium. The method includes: acquiring rear passenger occupancy status information and rear ambient lighting music rhythm enable status information detected by onboard sensors; if the rear passenger occupancy status information indicates no occupancy, the rear ambient lighting music rhythm enable status information is invalid; and if the vehicle speed exceeds a first preset speed threshold or the vehicle travel time exceeds a first preset duration, a first control command is generated, and the rear ambient lighting is gradually dimmed from normal brightness over a second preset duration according to the first control command. This invention allows the rear ambient lighting to be turned off when the driver does not require its use, reducing energy consumption.

The invention discloses a cultivation frame for oat seedling raising, and relates to the field of agricultural instruments. A cultivation frame for oat seedling raising comprises a base, and further comprises lead screws symmetrically and rotationally connected to one side of the base; the driving mechanism is used for driving the screw rod to rotate and is mounted on the base; the lifting plate is in threaded connection between the two lead screws; the mounting rods are symmetrically and rotationally connected to the lifting plate; the screw rod is driven by the driving mechanism to rotate, so that the lifting plate can freely ascend and descend, the height position of the seedling raising box can be flexibly adjusted, the illumination uniformity of seedlings in each layer is guaranteed, and the problem of insufficient photosynthesis caused by illumination shielding is effectively solved; when a certain seedling raising box needs to be taken and placed, the lifting plate can be lowered to a proper height through the driving motor, so that an operator can take and place the seedling raising box easily and conveniently, the working efficiency is improved, and the risk of damage to seedlings is reduced.

The utility model provides a double-clamp sliding rail robot working platform, and relates to the field of auxiliary machining platforms. The splicing structure is installed at the top end of the working platform, a blocking piece and a limiting rod are installed on the splicing structure through an inserting groove, the blocking piece is located on the side edge of the splicing structure and used for freely adjusting the height, and a baffle structure is fixed into the blocking piece and is made of a semitransparent material capable of shielding light; the stop piece is controlled to be movably mounted, so that the stop piece and the limiting rod move together and are inserted into the insertion groove, the use height of the stop piece can be adjusted by controlling insertion of the limiting plates with different heights, sparks generated by welding can be blocked by the stop piece after the stop piece is fixed, and meanwhile dazzling light can be reduced through the baffle structure; the welding condition can be conveniently watched in a short distance, and the problems that when a common robot working platform with a sliding rail is used for welding parts, sparks splash out, dazzling light is generated, and short-distance watching is not convenient are solved.

The present application provides a spiral groove forming milling cutter, which has multiple cutting edges and multiple main chip grooves corresponding to the cutting edges, the cutting edges each independently have a rake face, a flank face and a cutting edge, the rake face forms a first rake angle at each location of the cutting edge, the main chip groove is a spiral groove, a secondary chip groove is arranged on the rake face, the secondary chip groove extends in the length direction along the direction of the negative angle face cutting edge, the secondary chip groove has a groove surface close to the negative angle face cutting edge, so that the groove surface of the secondary chip groove close to the negative angle face cutting edge forms a negative angle face second rake angle, the negative angle face second rake angle is greater than the corresponding first rake angle. The present application can effectively solve the problem of negative rake angle or too small rake angle of the cutting edge of the spiral groove forming milling cutter by providing a secondary chip groove to form a second rake angle, and convert the negative rake angle into a positive rake angle, which greatly improves cutting efficiency, reduces cutting resistance, and extends tool life.

The utility model provides a display screen light limiting cover and a display device with a specific visual angle, and the display screen light limiting cover comprises a bottom plate which is provided with a plurality of light outlet holes arranged in an array; the first surface of each reflective barrier is provided with a total reflection surface, the second surface of each reflective barrier is provided with a diffuse reflection surface, the reflective barriers are arranged on the bottom plate in parallel and attached to the bottom plate, the first surfaces of the reflective barriers are arranged close to the light outlet holes, and emergent light emitted from the light outlet holes is reflected towards a first side facing the first surfaces through the total reflection surfaces; when the display screen is in use, emergent light emitted from the light emitting hole is subjected to diffuse reflection towards the second side towards which the second surface faces through the diffuse reflection surface, so that the light emitted by the reflective barrier towards the second side is reduced, the content of the display screen cannot be observed from the second side of the reflective barrier, and the visual angle of the display screen is limited. According to the display screen light limiting cover, the display screen can have a narrow visual angle, and the display screen light limiting cover has the advantages of being simple in structure, low in cost, small in influence on the display effect and the like.

The invention relates to the technical field of LEDs, and particularly discloses an LED packaging device capable of reducing central emergent light, which comprises a bracket, an LED chip, a die bonding glue layer, a light blocking layer and a packaging glue layer, a bowl-shaped cavity is formed in the support, one side of the LED chip is attached to the bottom of the cavity, the other side of the LED chip is attached to one side of the solid crystal glue layer, one side of the solid crystal glue layer is attached to one side of the light blocking layer, the other side of the packaging glue layer faces an opening of the support, and the LED chip is arranged in the cavity. The packaging glue layer covers the surfaces of the LED chip, the die bonding glue layer and the light blocking layer, and the surface of the packaging glue layer is flush with the edge of the opening of the support. According to the invention, the light blocking layer is introduced, so that the packaging device can significantly reduce the light output of the central area of the LED chip, and enables the light distribution to be more uniform.