64results about How to "Control exposure" patented technology

The invention discloses a technology for advanced oxidization treatment of wastewater through complex ferrous activated persulfate or hydrogenperoxosulfate by multicomponent blending, and belongs to the field of water pollution control technology. According to the technology, a blending complexing agent is selected according to different water quality, and the mixing ratio of the blending complexing agent is controlled; the coordination space of active center irons is fully utilized to improve the stability of a complex compound, and thus the organic matter treatment efficiency of complex Fe2<+> catalyzed and activated sulfate or hydrogenperoxosulfate can be effectively improved. By blending, the pH (Potential of Hydrogen) range of complex Fe2<+> catalyzed and activated sulfate or hydrogenperoxosulfate is further expanded, relatively high pollutant removal rate can be kept at high pH condition, and the output of iron cements is decreased. The novel technology for the advanced oxidization treatment of the wastewater through complex ferrous activated persulfate or hydrogenperoxosulfate by multicomponent blending is high in efficiency, easy in operation, and applicable to the water treatment technology of organic wastewater with high pH (Potential of Hydrogen), and has a wide application potential in the field of advanced treatment of the wastewater.

The invention provides an evaporation or sublimation method of evaporation material in a vacuum evaporation unit, and a crucible unit for vacuum evaporation. The units can work continuously for a long term and prevent the degradation of the evaporation material. In a crucible base (13), a radioactive heat source (21) radiating heat waves mainly including infrared ray is disposed in a heat wave transmission tube (22). The heat wave transmission tube (22) is made of material through which the infrared ray can transmit. The heat waves from the radioactive heat source (21) emit on the surface of the evaporation material M in a crucible body (12) and heat the evaporation material to make the surface of the evaporation material M for evaporation or sublimation. Even if the evaporated or sublimated evaporation material M is adhered on the surface of the heat wave transmission tube (22) or the inner surfaces of the crucible body (12) and the crucible base (13), the heat waves can be used to make the evaporated or sublimated evaporation material M for evaporation or sublimation again.

The invention provides a manufacturing method and device of a liquid crystal panel capable of performing the orientation of the liquid crystal panel in the short time, not resulting into reduced reliability. The liquid crystal including a UV reaction material is encapsulated on the liquid crystal panel (8) between two light-transparent substrates (glass substrates) on a first workpiece platform (3a). In the first step, while applying the voltage from a probe (4), the light with wavelength larger than that of the absorbing end of the liquid crystal (wavelength range of 320nm-360nm) irradiates a first light irradiating part (1). Then, the liquid crystal panel (8) is transported on a second workpiece platform (3b) using a workpiece transportation mechanism (5) and the light with wavelength shorter than that of the absorbing end of the liquid crystal (wavelength range of 300nm-320nm) irradiates a second light irradiating part (2), so as to perform the orientation of the liquid crystal. The lamp of the first step can use such as an iodine quasi molecule lamp and the lamp of the second step can use such as an XeCl quasi molecule lamp.

This invention discloses a kind of regression reflect fabric, including one reflection component, a metal reflection layer, a adhesive layer and one basic material, the reflection component layer is implied 30-130 grams of tiny glass beads with each square arranged intensively. The fabric's reflection function is good, the anti-coefficient can amount to the 70-700 cds / Lx / square m.

The invention relates to a chlorine dioxide slow-release device and its replenishment liquid, in particular to a chlorine dioxide slow-release device and its replenishment liquid for epidemic prevention and disinfection, food antisepsis and air purification. The device includes three parts: a container, a container cover, and a strip-shaped volatile matter. The supplement liquid includes the following parts by weight: 1-15 parts of sodium chlorite, 1-15 parts of activator, 1-10 parts of thickener, 1-5 parts of stabilizer, 0.5-2 parts of air barrier agent, 53-5 parts of purified water 95.5 servings. The beneficial effect of the device is to stably preserve the activated chlorine dioxide liquid, and to control the amount of moisture and air in contact with the strip-shaped volatiles by increasing and / or reducing the total area exposed to the strip-shaped volatiles in the air. Control the amount of chlorine dioxide released. According to the scale prompt on the container, when the chlorine dioxide liquid drops to a certain level, open the container cover, add replenishing liquid, and it can be recycled. It has the advantages of simple preparation process, low cost, convenient use and environmental protection.

The invention relates to an image interference etching method and the etching system which uses two quartered acoustic-optic modulators and which is characterized in that it uses two quartered acoustic-optic modulators to bend the laser beam from the laser, when the acoustic-optic modulator dose not have the supersonic power, the laser can directly through the acoustic-optic modulator; when the acoustic-optic modulator have the supersonic power, the laser generates a first-order diffraction light witch can provide the illumination of level direction and vertical direction.

The invention relates to a method for the real-time exposure monitoring during the preparation of a holographic grating. The method belongs to the technical field of spectrum and relates to a method for the real-time exposure monitoring during the preparation of the holographic grating. The technical problem to be solved is to provide the method for the real-time exposure monitoring during the preparation of the holographic grating. The technical proposal comprises the following steps: 1, providing with a set of holographic grating exposure device; 2, providing with a set of real-time monitoring device capable of precisely controlling the exposure of the holographic grating; 3, preparing a latent image grating and carrying out the real-time monitoring of the exposure; and 4, determining an exposure cutoff point. The method which introduces the real-time monitoring technology into the exposure process so as to determine the exposure cutoff point is a simple and effective means. The real-time exposure monitoring device can be used for the rapid and precise control on the exposure of the holographic grating, thereby further correctly determining the best exposure cutoff point, and providing scientific theoretic instruction and experiment basis for the holographic grating exposure technology.

The invention discloses a driving device for a robot gripper. The driving device comprises a mounting flange, a first bracket, a second bracket, a motor, a first lantern ring, a second lantern ring, a third lantern ring and a fourth lantern ring. A first spring is arranged between the first lantern ring and the limiting block; the third lantern ring winds the top of the first lantern ring through a first connecting rope; the bottom of the first lantern ring is hinged to a first gripper and a second gripper; a second slide bar is inserted onto the fourth lantern ring; a wedge block is connected to the inner side of the slide bar and an arc-shaped plate is fixedly connected to the outer side; the shaft of the motor is inserted into the fourth lantern ring; a base plate is also fixedly connected below the fourth lantern ring; the shaft of the motor is fixed below the base plate through a fixed bolt; a fourth spring sleeves the fixed bolt; the fourth spring is located between the motor shaft and the base plate; and the first gripper is wound on the arc-shaped plate through a second connecting rope. The driving device disclosed by the invention can improve the defects in the prior art and can be applied to a plant which is not driven by compressed air, and the gripper is more conveniently adjusted.

The invention discloses an adjustable self-heating acupuncture needle for needle warming moxibustion. The adjustable self-heating acupuncture needle comprises an acupuncture needle body filled with a self-heating material, a plurality of micro holes are formed in the tube wall of the acupuncture needle body, and air-permeable membrane is attached to the micro holes; the portion, corresponding to the air-permeable membrane, on the tube wall of the acupuncture needle body is wrapped with a sealing membrane; the air-permeable membrane is arranged on the outer side or inner side of the tube wall; the micro holes are formed in the circumferential direction of the acupuncture needle body. The adjustable self-heating acupuncture needle is disposable and low in manufacturing cost. The temperature of the adjustable self-heating acupuncture needle is controlled by the self-heating material, the contact amount between the self-heating material and air can be controlled by selecting different air-permeable membranes, then the temperature is adjusted, the heating temperature is 40-70 DEG C, and the heating time is 5-50 min; the self-heating material is completely arranged in the adjustable self-heating acupuncture needle and does not leak or harm the human body in use, and the acupuncture needle is good in hygiene and safety.

The invention belongs to the technical field of coating equipment, and specifically discloses an intelligent self-cleaning dual-curing coating system. The coating system comprises a spray gun, a feeding system, an ultraviolet light source device and a control system. The system disclosed by the invention can be used for construction for a single-component coating, a dual-component coating and a multi-component coating by combining a self-curing technology with a photo-curing technology; a series-excited motor is adopted for the spray gun, and a rotor rotating at a high speed, of the series-excited motor, enables two raw materials charged into the spray gun to be adequately mixed under the rotation of the high-speed rotor and then ejected; and the feeding system is capable of automatically adjusting and correcting pressures of charge pipelines for the two components, thus guaranteeing the accuracy of a mixing ratio of the two components, and improving the performance of a coating layer after coating curing. The system is capable of automatically controlling the working sequential logic of pumping, pressurizing and spray-coating, has the advantages that operation is simple and convenient, automatic coating can be realized, the performance of a coating film is excellent, and the like, and is free from VOC, non-toxic and odourless during a construction process. The system disclosed by the invention is capable of reserving the excellent anticorrosive and waterproof performances of the spray-coated polyurea coating, simplifying the construction difficulty and construction requirements of the coating, and optimizing the coating effect.

The invention provides a cantilever wheel belt polishing device with controlled pressure and a polishing method, belongs to the technical field of ultra-precision processing, and solves the problem that the polishing method in the prior art introduces a certain medium-high frequency error during polishing, so improving the surface precision is difficult, and optical components with large aspect ratio and complex surface cannot be polished effectively, specifically the inner surfaces; meanwhile, the controllable contact pressure polishing device adopts a single contact control method, which cannot effectively polish workpiece with great difference of the target surface. The polishing device provided by the invention comprises a bottom plate, a wheel bar assembly, a drive assembly, a dressing assembly, a polishing belt, a tensioning assembly and a guide idler, is mainly used for ultra-precision machining of optically complex surfaces of hard and brittle materials.

The invention discloses a focal plane mechanical shutter for an aerial camera. The focal plane mechanical shutter comprises a continuous tightening mechanism, an exposure control mechanism and a shooting signal obtaining mechanism. The invention also provides an optical apparatus. The focal plane mechanical shutter of the aerial camera, provided by the invention can realize control of high-frequency continuous exposure motion of the shutter and can accurately adjust the exposure time, the exposure quantity and the exposure work frequency of the shutter.

The invention relates to the technical field of cosmetics skincare essence, and discloses micro-control quantitative bottling equipment for skincare essence. The micro-control quantitative bottling equipment comprises a housing, wherein the top of the housing is fixedly connected to a connecting plate; a liquid inlet is formed in the surface of the connecting plate; a quantifying shaft is movablyconnected to the position, on the bottom of the liquid inlet, inside the housing; a gas flow hole is formed in the surface of the quantifying shaft; the surface of the quantifying shaft is fixedly connected to a regulating rod; the bottom of the quantifying shaft is movably connected to a torsion spring; the bottom of the torsion spring is movably connected to a liquid flow tube; a bearing plate is movably connected inside the liquid flow tube; the surface of the bearing plate is movably connected to an extending rod; the bottom of the bearing plate is movably connected to a pressure applyingrod; and a joint of a gas-pressure film and the pressure applying rod is movably connected to a pushing plate. The pushing plate continuously moves downwards to extrude the gas-pressure film, so thatpressure difference between the pushing plate and the gas-pressure film is the biggest, and therefore, the effect of sucking dropped and hung essence by pressure difference is achieved according to the pressure intensity difference principle.

The invention discloses a flotation pulp magnetizer which comprises a support frame body, a magnetizer body, a vacuum-pumping system, a distilling water storage tank, an air bag suspension stirring device and a control electric box, wherein a support plate is arranged on the support frame body, and the magnetizer body is arranged on the support plate; the vacuum-pumping system is arranged on one side of the magnetizer body and is connected with the support plate, and the distilling water storage tank is arranged on the other side of the magnetizer body and is connected with the support plate;the air bag suspension stirring device is arranged in the inner part of the magnetizer body, and the control electric box is arranged on one side of the support plate; and the magnetizer body comprises a magnetization tank, a magnetization sleeve and an eddy current oxygen exhauster, and the magnetization tank comprises an end cover and a tank body. According to the flotation pulp magnetizer, theair bag suspension stirring device is arranged in the tank body, a magnetic field is generated in the tank body through the magnetization sleeve at the outer part of the tank body, and a conducting loop is arranged in the air bag suspension stirring device in the tank body. The principle of electromagnetic induction is utilized, the air bag suspension stirring device rotates and crushes ores, andthe contact density of magnetized water and the ores is increased.

The invention relates to an image pickup apparatus and storage medium. The image pickup apparatus which is capable of being downsized and being power-saved, and is capable of following the focal plane and controlling the exposure during the variably-magnifying operation. There is stored information on a position of a focus lens corresponding to a position of a zoom lens, which is dependent on an object distance. The focus lens is moved based on the stored information when the zoom lens is moved. When a moving direction of the zoom lens is switched, the focus lens is stopped, and then the moving direction of the zoom lens is switched. The focus lens is moved based on the stored information after the switching.

The invention discloses a data cartridge. The data cartridge comprises a first cartridge body and a second cartridge body, wherein a limiting boss is arranged inside the first cartridge body, the second cartridge body comprises a cartridge frame body and a cartridge bottom board, the cartridge frame body is loaded in the first cartridge body till the end surface is laminated to the limiting boss,then a third cooling sheet does not exceed the bottom surface of the first cartridge body, a circuit board and a battery are fixed on the cartridge bottom board in the second cartridge body, the battery is connected with a charging and discharging circuit on the circuit board through a wire, a first sealing ring and a second sealing ring seals between the inner side of the first shell and the cartridge frame body in sequence from top to bottom, the second sealing ring is made of rubber, the upper side and the lower side of the first sealing ring are respectively provided with a first screw anda second screw, and the first screw and the second screw respectively penetrate through the first cartridge body and the second cartridge body and are screwed through threads. The invention further discloses a data box using the data cartridge and an emergency data projection system using the data box.

The embodiment of the invention discloses a method for determining semi-synchronous exposure parameters and an electronic device, which are used for well balancing the image effect and the splicing effect of a multi-lens panoramic camera, and providing an EV limit value set by a user so that the user can control the exposure effect according to the environment and the requirements of the user. Themethod disclosed by the embodiment of the invention comprises the following steps: acquiring a first exposure parameter corresponding to each lens; if it is determined that the preset EV limit valueis not met according to the first exposure parameters of each lens and the adjacent lens, respectively calculating to obtain an exposure control parameter of each lens; calculating to obtain a secondexposure parameter corresponding to each lens according to the exposure control parameter of each lens and the first exposure parameter corresponding to each lens; and if it is determined that the preset EV limit value is met according to the second exposure parameters of each lens and the adjacent lens, determining the second exposure parameter corresponding to each lens as the semi-synchronous exposure parameter of each lens.

The invention provides a method for preparing and using a low-heavy-metal-content chlorella cultivation raw material mother solution. The method is characterized by comprising the following steps: pretreating humic acid used as a main material to obtain liquid fulvic acid and solid humic acid; mixing the liquid fulvic acid with a micro-element raw material to prepare a mother solution, and promoting dissolution of the microelement; mixing the solid humic acid with a high-heavy-metal-content raw material mother solution, and adsorbing heavy metals by using humic acid to reduce the heavy metal content of the raw material mother solution, thereby obtaining a solid part namely humic acid with the adsorbed heavy metals; and removing the heavy metals from humic acid with the adsorbed heavy metal by virtue of an acid cleaning method to realize regeneration. The microelement cultivation raw material mother solution containing humic acid and the constant cultivation raw material mother solution without the heavy metals, which are proportioned according to certain used amounts, can be used for cultivating various chlorella, and the method is low in cost, simple to operate, capable of effectively reducing the heavy metal content of chlorella cultivation raw materials, and capable of effectively promoting the growth of chlorella and effectively improving the product quality and yield of chlorella.

A self-adaptive visible light panoramic shooting system is characterized by comprising at least one panoramic camera and at least one infrared camera, the infrared camera collects images, and the exposure time of a panoramic lens is calculated and controlled by recognizing and processing the infrared images through an algorithm. The system can be used for unified adjustment of panoramic images imaged and exposed by a single camera and multiple cameras at the same time; panoramic images and infrared thermal images are collected in a unified mode through a thermal infrared imager and a panoramiccamera matrix, the collected images are processed through a corresponding algorithm, and therefore exposure and focusing processing of a camera is controlled, and self-adaptive visible light panoramic shooting is completed.

The invention discloses an image sensor, a camera module and electronic equipment, the image sensor comprises a plurality of pixel units, each pixel unit comprises a photosensitive component, the photosensitive component comprises a photosensitive element, a first switch and an optical filter corresponding to a sensed color, the photosensitive element and the first switch are connected in series between a signal end and a grounding end, the light emitting surface of the optical filter faces the photosensitive element; a reset circuit which is connected between a power supply end and the grounding end, the reset circuit comprises a control module and a reset switch, and the output end of the control module is connected with the reset switch; an electric energy storage circuit which is connected between the signal end and the grounding end; and a processing module which is connected with the input end of the control module, and the structure of the image sensor can control the exposure capability of the pixel units in one exposure process.

The invention provides a pure-phase polygonal W2C nano material and a preparation method thereof. The preparation method comprises the following steps of: 1), mixing and stirring a tungsten source andethylene glycol to be uniform, and obtaining a first solution; 2) uniformly mixing and stirring a carbon source, ethylene glycol and water to obtain a second solution; 3) uniformly mixing and stirring the first solution and the second solution to obtain a turbid liquid, and separating out a solid; and 4) carrying out heat treatment on the solid obtained in the step 3) in a reducing atmosphere toobtain the pure-phase polygonal W2C nanomaterial. According to the method, the pure-phase, high-surface-area and high-activity W2C nanomaterial can be prepared under the conditions of no toxicity, noharm and no addition of organic matters.

The invention discloses an atmospheric air plasma jet device for skin treatment. The atmospheric air plasma jet device for skin treatment includes: a center electrode, a dielectric layer, a peripheralelectrode, a cylinder-type outer insulating shell, a first flow path, a first inlet, a first outlet, and a power supply unit. The power supply unit applies a voltage to the two electrodes so that theair flowing into the first flow path is plasmatized between the end of the center electrode and the inner surface of a ring portion, and plasma is discharged to the outside of the ring portion.

The invention discloses an adjustable self-heating acupuncture needle for needle warming moxibustion. The adjustable self-heating acupuncture needle comprises an acupuncture needle body filled with a self-heating material, a plurality of micro holes are formed in the tube wall of the acupuncture needle body, and air-permeable membrane is attached to the micro holes; the portion, corresponding to the air-permeable membrane, on the tube wall of the acupuncture needle body is wrapped with a sealing membrane; the air-permeable membrane is arranged on the outer side or inner side of the tube wall; the micro holes are formed in the circumferential direction of the acupuncture needle body. The adjustable self-heating acupuncture needle is disposable and low in manufacturing cost. The temperature of the adjustable self-heating acupuncture needle is controlled by the self-heating material, the contact amount between the self-heating material and air can be controlled by selecting different air-permeable membranes, then the temperature is adjusted, the heating temperature is 40-70 DEG C, and the heating time is 5-50 min; the self-heating material is completely arranged in the adjustable self-heating acupuncture needle and does not leak or harm the human body in use, and the acupuncture needle is good in hygiene and safety.

The invention discloses a leveling process for a textile product. The leveling process comprises the specific steps: wetting a textile material sheet, tensioning the textile material sheet; ironing and leveling the textile material sheet; and extruding and rolling the textile material sheet. A leveling device comprises two vertical plates, an unreeling roll is mounted between the two vertical plates, a spraying assembly is arranged on one side of the unreeling roll, a leveling assembly is arranged on one side of the spraying assembly, a tightening roll is arranged on one side of the leveling assembly, a supporting roll is arranged on one side of the tightening roll, a rotary roll is arranged above the supporting roll, and a reeling roll is arranged on one side of the guiding roll. The textile material sheet is sprayed through a nozzle, so that the textile material sheet is prevented from being damaged by excessive heating of an ironing plate, and the leveling effect is improved. The contact degree of the ironing plate and the textile material sheet is controlled conveniently, the tightening roll presses down and tensions the textile material sheet, the wetting effect of the textilematerial sheet and the ironing and leveling effect are improved, the textile material sheet is extruded and leveled, and the leveling effect is good.

The invention discloses alloy surface finish treatment equipment and relates to the technical field of alloy surface treatment equipment. The alloy surface finish treatment equipment comprises a polishing mechanism and a transfer mechanism. The polishing mechanism comprises a polishing motor and a plurality of polishing wheel discs driven by the polishing motor to rotate, the polishing wheel discsare paved on a same horizontal plane, and the transfer mechanism comprises transfer pressure blocks fixing the front and back ends of an alloy plate and a transfer push rod connected to the transferpressure blocks. The transfer mechanism further comprises a propelling device arranged at the tail end of the transfer push rod and a transfer track arranged above the propelling device. The propelling device is mounted on the transfer track. The alloy surface finish treatment equipment is mainly used for polishing the surface of the alloy plate to improve the roughness of the surface of the alloy. The alloy surface finish treatment equipment can prevent the alloy plate from being extruded to deform while polishing the alloy plate, so that the polishing quality is improved. Meanwhile, the polishing precision can be further controlled by controlling the contact forces between the alloy plate and the polishing wheel discs and the operating power of the propelling motor.

The invention provides a programmable polarization hyperspectral imager based on aperture segmentation and an acoustic-optic tunable filter, which mainly solves the technical problem that the time division polarization hyperspectral imager is only applicable to static scenes and has the advantages of small and compact structure, easy tuning and the like. The programmable polarization hyperspectral imager comprises a front lens, a field diaphragm, a front collimator, a four-aperture polarizer, a sub-aperture imaging lens, a rear collimator, an AOTF, an imaging lens, a detector, an optical trapand the like, and can obtain all linear polarization information through aperture segmentation. The acousto-optic tunable filter (AOTF) is used as an analyzer and a light-slitting and color-dispersing component, four linear polarization narrow-band spectral images which have different polarization directions and are spliced together are ultimately formed on the detector, and the information on all the linear polarization images within the whole spectral coverage can be obtained through tuning the drive frequency of the AOTF.

The invention relates to a cambered surface assembly type mounting device for a special-shaped plate. The cambered surface assembly type mounting device comprises a transverse special-shaped jogglingsleeving plate, a transverse special-shaped joggling inserting plate, wood tenon covers and an arc-shaped framework. A connecting groove is formed in the transverse special-shaped joggling sleeving plate; a connecting block is arranged on the transverse joggling inserting plate; the transverse special-shaped joggling sleeving plate and the transverse joggling inserting plate are connected and fixed by the manner that the connecting block is inserted into the connecting groove; a riding buckle is arranged in the middle of the arc-shaped framework; insertion grooves are formed in the transversespecial-shaped joggling sleeving plate and the transverse special-shaped joggling inserting plate. After being fixed, the transverse special-shaped joggling sleeving plate and the transverse special-shaped joggling inserting plate are connected by the manner that the riding buckle of the arc-shaped framework is inserted into the inserting grooves; and the wood tenon covers are fixed through the wood tenon holes of the transverse special-shaped joggling sleeving plate and the transverse special-shaped joggling inserting plate. Through the connection of the transverse special-shaped joggling sleeving plate and the transverse special-shaped joggling inserting plate and the design of the arc-shaped framework, the mounting and splicing accuracy is improved, the cost is reduced, the surface machining is reduced, the appearance is attractive, and the practicability is high.

The invention discloses a pelletized coating and a preparation method thereof. By utilizing the characteristics of seeds of brassicaceous vegetable Chinese flowering cabbage, and combining the occurrence of major plant diseases and insect pests of the Chinese flowering cabbage, the seeds of the Chinese flowering cabbage are accurately wrapped with fungicide and insecticide in a layered way; after seeded, the seeds with the pelletized coating of the Chinese flowering cabbage crack within a short time in presence of water to form bowl-shaped structures, and release the fungicide and the insecticide, thus controlling the plant diseases and insect pests, and protecting the germination of the seeds of the Chinese flowering cabbage and the growth of seedlings. The seeds with the pelletized coating of the Chinese flowering cabbage comprise 5-20% of brighteners, 30-60% of insecticide layers, 5-40% of fungicide layers and 15-30% of the seeds of the Chinese flowering cabbage in sequence from outside to inside.

The present application relates to an exposure device, comprising: a liquid crystal display mask, comprising a first substrate, a second substrate and a liquid crystal layer, a plurality of liquid crystals being distributed in the liquid crystal layer; a controller, used for controlling the liquid crystal display mask to display a preset pattern and controlling the area, except the area covered bythe preset pattern, of the surface of the liquid crystal display mask to be a lightproof area. First emergent light emitted by a light source irradiates and penetrates through the surface of the liquid crystal display mask. When the area is covered by the preset pattern, second emergent light is emitted, the light source irradiates the exposed object to enable the surface, irradiated by the second emergent light, of the exposed object to be exposed to display a preset shape pattern, and controls the driving voltage values of the liquid crystals in different areas in the liquid crystal layer by the controller so as to control the rotating direction and / or the twisting degree of the liquid crystals in the different areas and control the intensity value of the second emergent light. The exposure device is simple in imaging, low in cost and high in imaging accuracy.