130 results about "Light barrier" patented technology

The invention discloses a PCB (Printed Circuit Board) capable of directly installing a double-optical-path optical axis, the double-optical-path optical axis and a keyboard, the PCB is provided with a plurality of slotted holes, the PCB is fixed with the double-optical-path optical axis through the slotted holes, each double-optical-path optical axis is correspondingly provided with a chip and a photosensitive element, and the chip is one of a full-color control chip, a color control chip, a load color control chip, a fantasy color control chip and a full-load color control chip. The double-light-path optical axis comprises a bottom shell, a spring, an upper cover, a pressing handle with a light barrier, a double-light-path light guide body and a receiving light guide body. The four chips serve as emitting light sources of the double-light-path light guide body, one chip provides an emitting light source for the light switch, the other chip provides light source for the key cap character illumination and the light sensitive element receives the emitting light source of the light switch, meanwhile, the double-light-path optical axis is directly installed on the PCB, a special shaft body fixing plate is omitted, the material cost and the assembly cost are reduced, and the keyboard height is also reduced. The assembly error between the original shaft and the PCB is naturally eliminated, and the stability and the reliability of the keyboard function are improved.

The present invention provides a visual indicator film for the freshness of fresh-cut fruits, a preparation method, the use and a detection method. The preparation method comprises the following steps: preparing a Co-based MOF; washing and activating the Co-MOF; preparing a CMC-Na-based thin film; and preparing a CMC-Na-based thin film, and thereby obtaining an indicator film for phenol red (PR) or an indicator film for bromothymol blue (BTB). In the present invention, an irregular spherical Co-based metal organic framework (Co-MOF) loaded with PR or BTB is prepared, and the nanocomposites Co-MOF / PR and Co-MOF / BTB are obtained after dyes and the MOF are adsorbed by means of the hydrogen bond interaction. Then, the nanocomposites are embedded into a sodium carboxymethyl cellulose (CMC-Na) base material to prepare CO2-responsive packaging materials, namely, a CMC-Na / PR / Co-MOF and a CMC-Na / BTB / Co-MOF, which are used for monitoring the freshness of fruits in real time and in situ. The Co-MOF-based composite thin film has good water resistance, time-temperature stability and mechanical properties, and also exhibits enhanced ultraviolet-visible light barrier properties, dye migration resistance and thermal stability. The visual indicator film for the freshness of fresh-cut fruits can effectively reflect the concentration of CO2, and is suitable for real-time and in-situ monitoring of the freshness of fruits.

The invention relates to a mobile laser scanning microscope (100) comprising: a chassis (10) with rollers (12), an optical table (30) connected to the chassis (10) via a vibration damper (20), an upper optical box (40) containing a scanning head (42) with acousto-optical deflectors, a pillar (60) connecting the upper optical box (40) to the optical table (30) and holding it at a distance above therefrom, a stage (31) arranged on the optical table (30), a microscope module (32) arranged above the stage (31) and comprising a microscope objective (33) optically coupled to the scanning head (42) and at least one detector (75a, 75b), at least one laser (35) arranged on the optical table (30), an optical beam path (36) guiding a beam of the at least one laser (35) from the at least one laser (35) through the upper optical box (40) to the objective (33), compartments (17) connected to the chassis (10) below the optical table (30) and housing power supplies (15) and control systems (16) of the microscope (100), and a light barrier system (50) having a cover (52) covering units arranged on the optical table (30).

This invention relates to a light-blocking plate, comprising a support frame, a first baffle, a second baffle, and a motor. The first baffle is fixed to the support frame, and the motor is fixed to the first baffle. The output shaft of the motor is connected to the second baffle to drive the second baffle to rotate relative to the first baffle. The first baffle has a plurality of first through holes, and the second baffle has a plurality of second through holes. The second baffle is configured such that, by rotating relative to the first baffle, any one of the second through holes aligns with one of the first through holes on the first baffle. The light-blocking plate of this invention, by driving the second baffle to rotate relative to the first baffle via a motor, allows for convenient adjustment of the position of transmitted light.

The utility model discloses a bidirectional light emitting's wall lamp, including the lamp body, opposite the lens illumination mechanism and adjustable illumination mechanism of being equipped with on the lamp body, wherein the lamp body is also by shell, backplate and light source module composition, wherein, light source module is by element loading box and seal cover composition, and element loading box realizes its inside waterproof sealing function under the lid effect of seal cover, then element loading box is set up the light -transmitting part on, and the lens illumination mechanism adopts the spotlight lens of directly facing the light -transmitting part, makes this light source module have the lighting effect of spotlight irradiation, and adjustable illumination mechanism adopts the light -blocking piece that can swing adjustment in the both sides of light -transmitting part, makes this light source module have the fan -shaped lighting effect of adjustable range, and the expandability of bidirectional light emitting wall lamp both ends lighting effect has been improved greatly.

The application discloses a kind of human eye test conoscopy, comprising: front light barrier, the light aperture of the light barrier is not more than 4mm;Imaging lens group, close to object plane, with positive focal length, can be not less than 120 degree field of view incident light rays converge into, and form approximate telecentric intermediate image in rear;Relay lens group, close to image plane, with less than 1 magnification, for imaging intermediate image at image plane;The focal length GF1 of the imaging lens group is less than 16.2mm, the focal length GF1 of imaging lens group and the focal length GF2 of relay lens group satisfy the following relationship: 0.2<GF1 / GF2<0.3;Imaging circle diameter is D1, and the diameter of diaphragm is D2, satisfy: 8<D1 / D2<10.The above-mentioned human eye test conoscopy can realize similar test effect with direct observation of human eye, suitable for testing near-eye display device, and can meet the imaging effect of large image plane, high resolution and no vignetting.

The utility model relates to the technical field of jumper fibers, in particular to a jumper fiber convenient to identify. According to the technical scheme, the optical fiber jumper comprises a jumper wire and connecting plugs, the two ends of the jumper wire are fixedly connected with the connecting plugs, a light guide pipe is fixedly installed in the jumper wire, the two ends of the light guide pipe are located at the positions, close to the two connecting plugs, of the exterior of the jumper wire, and light barriers are fixedly installed at the positions, close to the two ends of the light guide pipe, of the exterior of the jumper wire. And light dispersion plates are fixedly mounted on the sides, close to the light guide pipe, of the outer surfaces of the two light barriers. According to the utility model, when the jumping fiber trend and the connecting plug are searched, the jumping fiber trend and the connecting plug can be rapidly and conveniently identified, and the working efficiency is improved.

A testing device for the maximum tracking angular velocity of a photoelectric system comprises a two-degree-of-freedom rotary table, an integrated light pipe assembly, a portal frame and a clock synchronization unit, the integrated light pipe assembly is installed on one side of an azimuth axis of the two-degree-of-freedom rotary table, and the integrated light pipe assembly comprises a collimator and a diaphragm; the portal frame is composed of two stand columns and a cross beam, the stand columns are located outside the two-degree-of-freedom rotary table, the cross beam is located above the two-degree-of-freedom rotary table, and a mounting plate is arranged below the cross beam. Before testing, the tested photoelectric system is mounted on a mounting plate of the portal frame, so that the center of the tested photoelectric system is longitudinally aligned with the rotating axis of the two-degree-of-freedom turntable, and the critical angular velocity corresponding to the timestamp obtained by the clock synchronization unit is recorded during testing. According to the device and the method, the adaptability problem of the two-degree-of-freedom turntable for testing a large-size and heavy-weight photoelectric system is solved, and the reading accuracy problem of the angular velocity of the two-degree-of-freedom turntable at the moment of tracking loss is solved.

The utility model provides an angle pyramid light barrier switching device belongs to optical axis calibration technical field. The device includes stepping motor, angle pyramid prism, light barrier subassembly and light barrier rotating subassembly, angle pyramid prism fixed connection stepping motor's shell, light barrier rotating subassembly swing connection light barrier subassembly and fixed connection stepping motor's output shaft, be used for under the drive of stepping motor drive light barrier subassembly rotates on stepping motor's shell, light barrier subassembly can intercept the incident light path of angle pyramid prism in the rotating process. The utility model replaces the whole translation of angle pyramid prism with the partial swing of light barrier subassembly, has the advantages such as compact structure, reduce the equipment volume, accurate positioning and stable operation, guarantees the accuracy of optical axis calibration.

The utility model relates to a globe, in particular to a globe convenient for efficiently demonstrating and observing revolution and rotation effects, which comprises a support main body, an earth body, a light barrier, an illumination light source and a point light source, the support main body is connected with a first support through a first clamping shaft, and the support main body is connected with a second support through a second clamping shaft; clamping holes allowing the first clamping shaft and the second clamping shaft to penetrate through are formed in the two ends of the earth body respectively, the light barrier is arranged in the earth body and rotationally arranged between the first support and the second support, the illumination light source is arranged on the light barrier, the light barrier is provided with an electric connector A, and the electric connector A is electrically connected with the illumination light source and the point light source. The first support is provided with an electric connector B which is electrically connected with the power source and rotationally matched with the electric connector A. The point light source is arranged in the middle of the light barrier, the lighting source and the point light source are arranged on the same side, the point light source is arranged on the light barrier, the structure is more compact, and the sight of an observer cannot be shielded.

The utility model relates to a testing tool for a light blocking strip, and relates to the field of testing tools for automobile light blocking strips. The device comprises a testing seat, the testing seat comprises a base plate, a first side plate and a second side plate, the first side plate and the second side plate are vertically installed on the two sides of the base plate respectively, the base plate, the first side plate and the second side plate are integrally formed, an adjustable solenoid frame is horizontally installed in the first side plate, and a first clamping frame is installed in the adjustable solenoid frame. According to the integrated design of the test seat and the reasonable installation mode of all the parts, the structural stability of the whole test tool is guaranteed, various forces in the test process can be borne, and test errors caused by tool shaking are reduced. The adjustable design of the first clamping frame enables the testing tool to adapt to the light blocking strips with different lengths, and the flexible sliding of the vertical pressing frame and the selective installation of the positioning vertical sheet can meet the testing requirements of the light blocking strips with different shapes and sizes.

The present disclosure relates to an optical system of a fundus camera with a light barrier, which comprises an illumination device, a first optical assembly, a second optical assembly, an imaging device and a positioning device; the illumination device comprises an illumination light source; the first optical assembly comprises a first half-transmission half-reflection mirror, a first polarizer, a second half-transmission half-reflection mirror and a retinal objective lens, the first optical assembly directs the light beam from the illumination light source to the fundus of the eye to be examined, and guides the reflected light of the fundus to the second optical assembly; the second optical assembly comprises a second polarizer and a focusing module, the focusing module guides the reflected light to the imaging device; the imaging device receives the light from the second optical assembly to form the fundus image; the positioning device comprises a guiding light source and a light barrier, the light beam of the guiding light source has a preset shape after passing through the light barrier, the imaging device acquires the fundus images of different regions of the eye to be examined based on the guiding light source, and the first optical assembly directs the light beam of the guiding light source to the fundus of the eye to be examined for imaging.

The utility model relates to the technical field of gas chromatographic instruments, and discloses a portable gas chromatographic device capable of quickly screening, which comprises a bottom shell, a top cover is rotatably connected to the rear end of the top of the bottom shell, the front side of the outer wall of the bottom shell is connected with the top cover through a fixing component, slots are formed in the left end and the right end of the front side of the top cover, and the top cover is connected with the bottom shell through a fixing component. A sliding block is slidably connected to the inner wall of the inserting groove, second limiting grooves are formed in the top ends of the left side and the right side of the outer wall of the top cover, the second limiting grooves are connected with the sliding block through sliding assemblies, a connecting block is detachably connected to the inner wall of the inserting groove, a through groove is formed in the front side of the connecting block, and a light barrier is fixedly connected to the bottom end of the front side of the connecting block. According to the utility model, through the light blocking structure formed by the slot, the slide block and the like, the problem that outdoor data checking is inconvenient is solved, and the detection convenience is improved; meanwhile, by utilizing structures such as a shaft rod, the device can be quickly and stably opened and fixed, shaking is avoided, and the accuracy of data during soil organic pollutant detection is guaranteed.

The utility model relates to the technical field of lighting equipment, and discloses a horizontal light scattering LED lamp which comprises a lamp shell, an LED lamp body is installed at the bottom end of the lamp shell, an LED main control board is installed in the lamp shell, supporting strips are fixedly connected to the two sides and the two ends of the front end of the lamp shell, light barriers are arranged outside the supporting strips, and the light barriers are connected with the LED main control board. The inner side of the light barrier is fixedly connected with a light scattering piece, the light barrier is fixedly connected with a C-shaped buckle, a positioning bolt is installed on the C-shaped buckle, and heat dissipation openings are formed in the two sides of the lamp shell. According to the LED lamp capable of horizontally dispersing light, the horizontal heat dissipation effect of the lamp is improved through the light dispersing cover, the light barrier outside the lamp shell can be adjusted according to the heat dissipation requirement, during adjustment, the light barrier is rotated to a proper installation angle firstly, the C-shaped buckles on the light barrier rotate on the supporting strips, then the light barrier can be positioned by rotating and tightening the positioning bolts, and therefore the light dispersion effect is improved. The light barrier can be directly detached from the supporting strip, and the problem that the horizontal light scattering effect is poor is solved.

The invention discloses a current induction electricity taking type light-emitting obstacle ball, and belongs to the technical field of obstacle balls. The obstacle ball comprises a ball body outer shell, a ball body inner shell and a ball body outer shell, the light-emitting module comprises light bars which are arranged in the circumferential direction of the inner surface of the spherical shell; the current induction electricity taking module is clamped on a power transmission line wire and is used for obtaining electric energy through electromagnetic induction; the energy storage buffer module is electrically connected with the current induction electricity taking module and is used for storing electric energy and stabilizing output voltage; the intelligent control module is electrically connected with the energy storage buffer module and the light-emitting module and used for controlling the working state of the light-emitting module; the spherical shell is fixed on a power transmission line lead through a clamping structure. Electricity is directly taken from the high-voltage line through electromagnetic induction, self power supply is achieved, 360-degree omnidirectional light emitting is achieved by adopting the sphere structure and the circumferential light bar design, and the 360-degree omnidirectional light emitting device has the advantages of being compact in structure, convenient to install, free of maintenance and good in warning effect.

The utility model discloses a fixing device for spectral measurement of a large-size optical filter. The fixing device comprises a light barrier, a center measurement mechanism and an edge measurement mechanism, a light through hole penetrates through the light barrier; a first movable backup plate in the center measuring mechanism is movably arranged on a first mounting bottom plate through a first guide limiting structure, so that the first movable backup plate is close to a first fixed side plate to form a first optical filter fixing cavity, and the first optical filter fixing cavity is arranged corresponding to the light through hole to realize the light splitting effect of detecting the center position of the optical filter to be detected; a second movable backup plate in the edge measuring mechanism is movably arranged on a second mounting bottom plate through a second guide limiting structure, so that the second movable backup plate is close to a second fixed side plate to form a second optical filter fixing cavity, the second optical filter fixing cavity is arranged corresponding to the light through hole, and the second mounting bottom plate is movably arranged on a limiting sliding seat; and the second optical filter fixing cavity is driven to transversely move relative to the light through hole, so that the light splitting effect of the to-be-detected optical filter at different edge positions at the same height is detected.

A smoke detector (2) according to the invention comprises a transmitter (4) for emitting electromagnetic radiation through an exit opening (28) and a receiver (8) for receiving electromagnetic radiation through an entry opening (30), wherein the transmitter (4) and the receiver (8) are arranged inside the smoke detector (2) and are designed and oriented such that they define a measuring range (22) outside the smoke detector (2). A light barrier (34) is arranged at least on the surface (12) of the smoke detector between the transmitter (4) and the receiver (8).

The application discloses a wave-particle duality demonstration teaching device, and relates to the technical field of wave-particle duality demonstration teaching, which comprises a wave-particle duality device and an upper computer software operating system, wherein the wave-particle duality device comprises a single-photon source system, a combined prism system, a photon collection system and an electronic control system; the combined prism system comprises a first prism, a second prism and a light shield; the first prism and the second prism make the second polarized light output by the single-photon source system carry out Mach-Zehnder interference under the set adjustment angle of the light shield, and an interference light path is obtained; the electronic control system is used for counting the photons detected by a single-photon detector; and the upper computer software operating system displays the detection result. The wave-particle duality can be directly demonstrated through the wave-particle duality device and the upper computer software operating system, and the change of the photons can be observed only by adjusting the light shield, so that the operation is convenient.

The application relates to the technical field of photoetching equipment, in particular to a calibration device and a calibration method, a light deviation module comprising an integrated tool, a deviation mirror and a first light barrier; the integrated tool is provided with a first mounting groove at a first end and a second mounting groove at a second end; the deviation mirror is embedded in the first mounting groove, and the first light barrier is arranged in the second mounting groove; a channel extending along a light barrier axis of the first light barrier is arranged in the integrated tool; light emitted by a collimator included in the calibration device sequentially passes through the first light barrier, the channel and the deviation mirror; and the deviation mirror reflects the light to the collimator along a preset direction. The application has a compact structure, can accurately compensate the deviation of a light beam in a calibration light path, is convenient for accurate and efficient adjustment, and ensures the quality and reliability of a light source output light beam.

The utility model discloses a mobile phone support applied outdoors, which comprises a mobile phone clamping device, a mobile phone holder, a mobile phone support, a mobile phone support, a mobile phone support and a mobile phone support, and is characterized in that the mobile phone clamping device is used for clamping a mobile phone; the mobile phone holder is provided with a first light barrier group corresponding to the left and right side parts of the clamped mobile phone; the position covering shading piece is arranged at the upper end of the mobile phone holder and is rotationally connected with the mobile phone holder; the position covering shading piece is provided with a second light barrier group corresponding to the other part of the left side edge and the right side edge of the clamped mobile phone; when the position covering shading piece rotates relative to the mobile phone holder, the first light barrier set is connected with or away from the second light barrier set. The covering shading piece comprises a shading light-transmitting plate which is connected with the left light barrier and the right light barrier in the second light barrier set. Comprising an erection supporting piece connected with the mobile phone holder. Comprising a steering adjusting piece, and the erecting supporting piece is connected with the mobile phone holder through the steering adjusting piece.

Exemplary semiconductor structures may include a plurality of LED structures and a backplane layer. Exemplary semiconductor structures may also include a light barrier region positioned between the LED structures and the backplane layer. The light barrier region may be operable to absorb light at wavelengths shorter than or about 300 nm and transmit light at wavelengths greater than or about 350.

The parcel ejector mechanism in a multi-compartment transmitter-receiver comprises a motor, a push-out bumper, a starting position sensor (10), an end position sensor (11), a door open sensor, and a light barrier sensor (6). The motor has a gear system. The mechanism is equipped with at least two gears, a toothed belt, and at least two screws (4) mounted at at least one end. A number of nuts corresponding to the number of screws (4) are attached to the push-out bumper. The motor is equipped with overcurrent protection.

The invention discloses a preparation method of a multi-layer composite anti-blue light film, which comprises the following steps: premixing an ultraviolet absorbent, a blue light absorbent, a nano metal oxide, a dispersing agent and PET (Polyethylene Terephthalate) resin, and then carrying out melt blending, water cooling and pelletizing to obtain an anti-blue light master batch; pET resin and anti-blue-light master batch are mixed and then subjected to melting plasticizing, multi-layer co-extrusion die head curtain coating and cooling to obtain a casting piece, and then the casting piece is subjected to longitudinal and transverse sequential stretching and heat setting to obtain a light barrier functional layer; at least one surface of the light barrier functional layer is coated with a functional layer coating in a micro gravure coating or slit type coating mode, a surface functional layer is formed through drying or ultraviolet curing, and the multi-layer composite anti-blue light film is prepared. Through a specific compounded absorbent system and a multi-layer structure design, the average barrier rate of 300-460 nm harmful light rays is up to 99%, meanwhile, the low reflection / antistatic property and the excellent durability are achieved, and the problems that in the prior art, protection is incomplete, and the performance is single are solved.

The invention provides a focusing regulation and control device based on an Airy structure light field penetrating through a large-scale scattering water body and a working method thereof, and the device comprises an Airy structure light beam modulation module which comprises a laser, an attenuation sheet, a spatial light modulator, a beam expander, a diaphragm I, a reflective spatial light modulator SLMA, a reflector and a reflective spatial light modulator SLMB; wherein the mask improvement generation module comprises a diaphragm II, a lens Lens A, a lens Lens B, a lens Lens C, a scattering medium and a CCD (Charge Coupled Device) camera; wherein the intelligent algorithm iteration module adopts a hybrid genetic neural network to realize wavefront modulation and focusing penetrating through a scattering medium; the hybrid genetic neural network comprises a hybrid intelligent algorithm of a single-layer neural network and a genetic algorithm.

The invention discloses a spectrum calibration method, device, equipment and system for a monochromator, and the method comprises the steps: controlling a first diaphragm and a second diaphragm to move reversely on a focal plane of a first-stage light path along a first direction perpendicular to an optical axis until a first distance exists between the first diaphragm and the second diaphragm; the first diaphragm and the second diaphragm are controlled to be kept relatively static, the whole diaphragm moves in the first direction, and meanwhile first spectral information in the moving process is collected; determining a reference spectrum according to the first spectrum information; the first diaphragm and the second diaphragm are controlled to be kept relatively static at different preset intervals in sequence, the whole diaphragm moves in the first direction, and meanwhile second spectral information in the moving process is collected; and according to the comparison result of the second spectrum information and the reference spectrum, determining the corresponding relationship between the positions of the first diaphragm and the second diaphragm and the wavelength and the bandwidth. An additional calibration light source and any hardware operation are not needed, the monochromator can work in a closed environment for a long time, and high-precision automatic calibration can be achieved.

The present disclosure provides a display panel, comprising: a first substrate; an array of light emitting units and an array of color control units, the array of color control units being located on a side of the array of light emitting units away from the first substrate, and each color control unit in the array of color control units corresponding to one light emitting unit in the array of light emitting units; at least part of the light emitting units being provided with corresponding light barrier structures, the light barrier structures being located between the light emitting units and the color control units and having light transmission units; the light barrier structures being configured to shield light emitted by the light emitting units and directed to the color control units not corresponding to the light emitting units, and to allow part of the light emitted by the light emitting units and directed to the color control units corresponding to the light emitting units to be transmitted at the light transmission units corresponding to the light emitting units. The present disclosure also provides a preparation method of the display panel and a display device.

The invention discloses a lighting device, a control method of the lighting device, a control device of the lighting device, a computer readable storage medium and a computer program product. The lighting device includes: a light source; the diaphragm is provided with a through hole with an adjustable aperture, and light emitted by the light source passes through the through hole of the diaphragm to form illumination light for illuminating an image acquisition area of the image acquisition device; and the controller is configured to determine the brightness state of the current image according to the current image acquired by the image acquisition device, and adjust the aperture of the through hole to change the light distribution curve of the illumination light under the condition that the current image is in a local image highlight state, so that the brightness of the local image is reduced. Therefore, under the condition that the light emitting intensity of the light source is not changed, the highlight state of the local image can be improved or eliminated, and then it is guaranteed that the brightness of different local areas in the current image collected by the image collection device is consistent.

The application discloses a wafer box special intelligent clamping jaw with anti-falling protection, which comprises an assembling plate, a main plate frame, a left clamping plate and a right clamping plate, the assembling plate is fixed on one side end surface of the main plate frame, the assembling plate is connected with an external mechanical arm, the left clamping plate and the right clamping plate are respectively slidably connected on the left side and the right side of the main plate frame, the opposite surfaces of the left clamping plate and the right clamping plate are provided with lifting plates, the lifting plates are composed of lifting blocks, the front and back sides of the lifting plates on the opposite surfaces of the left clamping plate and the right clamping plate are also provided with symmetrical light barrier switch sensors, the lifting blocks are provided with clamping position sensors, the left clamping plate and the right clamping plate can be elastically deformed, the left clamping plate and the right clamping plate are in straight plate type rigid structures in general clamping use, can be restored to arc structures from the straight plate type structures in emergency triggering, can tightly hold wafer boxes, and can realize anti-falling protection in wafer box transportation.

The utility model provides a single-sided light-emitting LED chip and a display device, the single-sided light-emitting LED chip comprises a second contact electrode and an epitaxial laminated layer which are arranged on one side of a substrate, the surface of one side of the second contact electrode facing the epitaxial laminated layer is provided with an exposed first table board, the first table board surrounds the epitaxial laminated layer, and the first table board is provided with a second table board. The surface of one side, deviating from the substrate, of the epitaxial laminated layer is a light-emitting table surface; the first contact electrode covers the side wall of the epitaxial laminated layer and the first table top in a manner of spacing an insulating layer, and a light blocking layer made of an insulating material is arranged on a part of the first table top, is used for covering the side wall of the insulating layer and is jointed with the first contact electrode; wherein the light blocking structure formed by the light blocking layer, the first contact electrode and the second contact electrode can avoid the occurrence of stray light caused by light emitting from the side surface of the LED chip and an optical waveguide effect, so that the light emitted by the LED chip is emitted from the light-emitting table surface, and the single-surface light emitting of the LED chip is realized.

The application provides a kind of boiling-resistant anticorrosion aluminium plastic composite packaging bag and its preparation method.The aluminium plastic composite packaging bag is sequentially stacked from outside to inside: polyester film layer, ink layer, first adhesive layer, aluminium foil layer, second adhesive layer, polyamide film layer, third adhesive layer and modified polyolefin heat-sealing inner layer;The ink layer is directly compounded on the inner surface of the polyester film layer, the aluminium foil layer is bonded with the ink layer through the first adhesive layer, the polyamide film layer is bonded with the aluminium foil layer through the second adhesive layer, and the modified polyolefin heat-sealing inner layer is bonded with the polyamide film layer through the third adhesive layer.The application provides excellent oxygen, water vapor and light barrier properties through the composite structure of the aluminium foil layer and the polyester film layer, the polyamide film layer and the modified polyolefin heat-sealing inner layer;The modified heat-sealing inner layer further blocks the migration of flavor substances such as spices, ensuring that the original flavor of the sauce does not lose and does not smell.