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53 results about "Film plane" patented technology

A film plane is the area inside any camera or image taking device with a lens and film or digital sensor upon which the lens creates the focused image. The film plane varies in distance from the lens focal point in cameras from different manufacturers. Thus each lens used has to be chosen carefully to assure that the image from the lens is focused on the exact place where the individual frame of film or digital sensor is positioned during exposure. It is sometimes marked on a camera body with the 'Φ' symbol where the vertical bar represents the exact location.

Preparation method of multilayer film plane window reflector film system

The invention provides a preparation method of a multilayer film plane window reflector film system, which adopts a vacuum evaporation method, the structure of the film system is G (Hf-SiO2) n (A), a reflecting film takes HfO2 as a high-refractive-index material and takes SiO2 as a low-refractive-index material, and the HfO2 layer is completed by evaporating Hf deposition in an oxygen-containing vacuum environment. According to the method disclosed by the invention, the TOLLING value parameters are captured for multiple times in stages in the coating process, so that the performance of the prepared plane window reflecting mirror can be remarkably improved, the plane window reflecting mirror is closer to a design value, and the method has important application in preparation of a high-performance beam splitting film.
Owner:BEIJING CHUANGSI FILMING CO LTD

Thermoplastic resin film

Provided is a thermoplastic resin film having a haze of 13% or less, wherein a loop stiffness value in at least one direction on a film plane as measured by a loop stiffness tester is 140 mN / cm or more.
Owner:UNITIKA LTD

Insulating film for pressure sensor, pressure sensor having insulating film, and production thereof

The invention relates to a heat-insulating film (2) for a pressure sensor (1) for determining the pressure of a fluid medium (F), comprising a film body (3) and a coating (5), a film surface (6) of the film body (3) facing the fluid medium (F) when the heat-insulating film (2) is used. The coating (5) has a layer-like structure (7), the longitudinal extension (DL) of which perpendicular to the film plane (XY) is at most half of the transverse extension (DQ) of which parallel to the film plane (XY) for a plurality of layers (9).
Owner:KISTLER HLDG AG

A method for detecting concentration of magnetic nanomaterials

The present invention provides a method for detecting the concentration of magnetic nanomaterials, and relates to the technical field of detecting trace magnetic nanomaterials. In the process of detecting the concentration of magnetic nanomaterials by using the spin-torque ferromagnetic resonance (ST-FMR) technology, a microwave current is introduced into the SOT source layer along the X direction to generate a spin current perpendicular to the plane direction of the film, which acts on the magnetic moment of the adjacent ferromagnetic layer to generate a torque, causing it to precess. When the magnetic nanomaterial is dripped onto the surface of the ferromagnetic layer film, the resonance condition during the ST-FMR test is affected, so that the damping factor of the system increases with the increase in the amount of magnetic nanomaterials, thereby achieving quantitative and accurate detection of low-concentration (≤0.5 mg / mL) magnetic nanomaterial solutions. The method has low testing cost, short detection time, and high detection sensitivity.
Owner:BEIJING NORMAL UNIVERSITY

Method for producing a three-dimensionally shaped heating foil, heating foil, cover plate for headlights

The invention relates to a method for producing a three-dimensionally shaped heating foil (18), comprising the following steps: - Providing a substrate (20) extending along a film plane (22) with a first substrate region (24) for receiving a heating wire (36) and with a second substrate region (26) adjacent to the first substrate region (24), wherein at least one contact point (38) can be provided or is provided in the second substrate region (26); - arranging at least one connector pad (34) on the substrate (20) in the first substrate region (24); - arranging at least one heating wire (36) on the substrate (20) in the first substrate region (24); - connecting the at least one connector pad (34) and the at least one heating wire (36); - forming the second substrate region (26) to form a three-dimensional shape deviating from the film plane (22); and - Arranging at least one additional pad (40) on the substrate (20) in the first substrate region (24) and in the second substrate region (26) for connecting the at least one contact point (38) and the at least one connector pad (34).
Owner:MARELLI GERMANY GMBH

profile strip

Profile strip (10), comprising a profile body (12) and a double-sided adhesive tape (24), wherein the profile body (12) and the adhesive tape (24) extend parallel to a main axis (30) of the profile strip (12), wherein the adhesive tape (24) is connected with a first adhesive side (18) to a fastening section (20) of the profile body (12), and wherein a second adhesive side (88) facing away from the first adhesive side (18) is covered with a protective film (16) which extends in a protective film plane (90), wherein the profile strip (10) comprises a grip tab (36) which has a flat body (42) extending in a tab plane (40) and which is connected to the protective film (16) via a connecting section (38), so that the protective film (16) can be removed from the second adhesive side (88) by means of the grip tab (36), characterized in that the Tab plane (40) angular, in particular vertical,to the protective film plane (90) and that the tab plane (40) extends in a direction parallel to the main axis (30).,
Owner:ELKAMET KUNST GMBH

Process cartridge

The processing box includes a housing, a photosensitive drum, a developing roller, a powder feeding roller, a drive head, and a powder hopper. The photosensitive drum, developing roller, and powder feeding roller are rotatably supported on the housing. The axis of the photosensitive drum is parallel to but does not coincide with the axis of the drive head. The housing is provided with first and second positioning posts, the axis of the first positioning post coinciding with the axis of the photosensitive drum. The powder hopper is housed within the housing and has a powder outlet with a sealing film. Before the sealing film is removed, it is tightly attached to the welded sealing film plane at the edge of the powder outlet. The first distance b between the first edge of the sealing film and the plane passing through the axis of the photosensitive drum and the axis of the drive head satisfies 5mm ≤ b ≤ 23mm. The first included angle g formed between the sealing film and the plane passing through the axis of the photosensitive drum and the axis of the drive head satisfies 30° ≤ g ≤ 105°. Alternatively, the sixth included angle k formed between the sealing film and the plane passing through the axes of the first and second positioning posts satisfies -28° ≤ k ≤ 47°.
Owner:HUIWEI CORP

Thermoplastic release film for semiconductor sealing process

PendingJP2025153419APolymer scienceFilm plane
To provide a thermoplastic release film for a semiconductor sealing process which has heat resistance required in a semiconductor sealing process such as resin molding in addition to excellent releasability between a sealing resin and a mold and mold followability, and is also excellent in handleability.SOLUTION: A thermoplastic release film for a semiconductor sealing process contains a crystalline resin (A) having a melting point of 180°C or higher, and an acrylic copolymer (B), wherein a lowest value of a storage elastic modulus E' at 100°C to 160°C is 10 MPa or more, in both of one direction in a film plane and the other direction in the film plane perpendicular to the one direction.SELECTED DRAWING: Figure 1
Owner:DENKA CO LTD

Pre-assisting microwave-assisted magnetic recording with spin-torque nano-oscillators

ActiveUS12597436B2Record information storageAssembling head elementsFilm planeMagnetization
The present embodiments relate to a pre-assisting microwave assisted magnetic recording (MAMR) (PA-MAMR) write-head structure where the STO is disposed within a leading shield (LS). The STO can be used to pump energy into the media before the writing process. The STO can also pre-excite the media and let the media oscillation damp over the time and then switch under the writer field. The present embodiments can be easier to increase the magnetic volume and magnetic moment of the free layer, while also achieving a greater oscillation frequency with magnetization oscillations around the axis in the film plane.
Owner:HEADWAY TECHNOLOGIES INC

Loudspeaker element and loudspeaker comprising such a loudspeaker element

The present invention relates to a loudspeaker element for a loudspeaker, comprising two membrane planes substantially spaced apart from each other, wherein each membrane plane comprises at least one electromagnetic wire, which is arranged to generate a magnetic field when an electric current passes through the electromagnetic wire, wherein at least one permanent magnet is arranged between the two membrane planes, wherein the electromagnetic wires of the two membrane planes can be connected to a power supply in such a way that current passes through the electromagnetic wires in substantially opposite directions, thereby generating substantially opposite magnetic fields, so that when an electric current passes through the electromagnetic wires of each membrane plane, the membrane planes are attracted toward the permanent magnet or repelled from the permanent magnet, and thereby move toward or away from each other, respectively, thereby generating sound waves.
Owner:IF-ADAMS PTY LTD

Thin film x-ray analysis apparatus

The present invention relates to an X-ray analysis apparatus for analysing a sample. The X-ray analysis apparatus includes a first roller and a second roller. The first roller and the second roller form a film plane along which a thin film passes. The apparatus comprises an X-ray source for irradiating a sample with X-rays and a detector configured to detect X-rays. The X-ray source is configured, in operation, to project X-rays to a work area between the first and second rollers and being positioned, in operation on a first side of the film plane. The apparatus further comprises a first side wall and a second side wall. The first side wall is positioned on a second, opposite, side of the film plane, to the X-ray source and is arranged between the work area and the first roller. The second side wall is also positioned on a second, opposite, side of the film plane to the X-ray source and is arranged between the work area and the second roller.
Owner:PANALYTICAL BV

Laminated polarizing film and preparation method thereof

The invention relates to the field of functional films, and discloses a laminated polarizing film and a preparation method thereof.The laminated polarizing film comprises high-refractive-index functional layers, low-refractive-index functional layers and protective boundary layers, and the high-refractive-index functional layers and the low-refractive-index functional layers are alternately stacked; the high-refractive-index functional layer is a PET layer, and the refractive indexes of the high-refractive-index functional layer under the wavelength of 550 nm meet the conditions that nx is 1.67-1.70, ny is 1.52-1.55, nz is 1.52-1.55, ny-nz is smaller than or equal to 0.004, and the in-plane birefringence nx-ny is larger than or equal to 0.12; the low-refractive-index functional layer is optically isotropic under the wavelength of 550 nm, the three-dimensional refractive index nx ', ny' and nz 'of the low-refractive-index functional layer are all between 1.53 and 1.55, and the in-plane birefringence nx'-ny 'is less than or equal to 0.005; wherein the x-axis is the polarization function direction of the laminated polarization film, the y-axis is perpendicular to the x-axis and is located in the film plane, and the z-axis is perpendicular to the film plane. According to the invention, the problem of PET three-dimensional refractive index imbalance caused by a single drawing process is solved, and high-precision matching of the PET material and an isotropic low-refractive-index material in y-axis and z-axis directions is realized.
Owner:CHANGDI NEW MATERIAL TECHNOLOGY (SHANGHAI) CO LTD +1

Biaxially oriented polypropylene film

PendingJP2025126118APolymer scienceFilm plane
To provide a biaxially oriented polypropylene film that exhibits superior releasability and processability under high-temperature conditions, and that is suitably usable as a release film subjected to processing under high temperature.SOLUTION: A biaxially oriented polypropylene film is characterized in that a surface whose minimum autocorrelation length (Sal) is from 5 μm to 45 μm inclusive is designated as surface A, a direction in which the thermal shrinkage ratio at 150°C is maximum is designated as direction X, a direction orthogonal to the direction X in the film plane is designated as direction Y, the thermal shrinkage ratio at 150°C in the direction X is designated as Xs, the thermal shrinkage ratio at 150°C in the direction Y is designated as Ys, and a temperature at which shrinkage in the direction X reaches 0.04% is designated as XsT and a temperature at which shrinkage in the direction Y reaches 0.20% is designated as YsT in a heating process of thermomechanical analysis (TMA), wherein at least one surface is the surface A, the Xs and Ys satisfy Formula 1, XsT is in the range of 130°C to 160°C inclusive, and YsT is in the range of 140°C to 170°C inclusive. Formula 1: -10%≤Ys≤Xs≤10%.SELECTED DRAWING: None
Owner:TORAY INDUSTRIES INC

Flexible film plane surface shape high-precision control device and method

The invention discloses a flexible film plane surface shape high-precision control device and method, and belongs to the technical field of optical processing, the device comprises a flexible film, a quartz ring, a film pressing frame, a plurality of circumferentially distributed fastening bolts, a film bottom frame, a quartz ring base, and a plurality of circumferentially distributed distance adjusting bolts; according to the connection relation, the flexible film is clamped between the film pressing frame and the film bottom frame and is pre-tightened through the fastening bolt arranged between the film pressing frame and the film bottom frame, the quartz ring is supported by the quartz ring base and makes contact with the lower surface of the flexible film, and the distance between the quartz ring base and the film bottom frame is adjusted through the distance adjusting bolt. And the flexible film is circular. According to the invention, the surface shape precision of the flexible film can be effectively improved, the flatness of the flexible film plane is improved from the micron level of a traditional pure mechanical mirror frame to the nano level, and the application requirements of the flexible film as an optical reflector, a spectroscope and the like can be met.
Owner:INST OF OPTICS & ELECTRONICS CHINESE ACAD OF SCI

Large-area perovskite thin film layer, preparation method and application thereof

ActiveCN115101678BProcess equipmentFilm plane
The application discloses a large-area perovskite thin film layer and a preparation method and application thereof. The preparation method of the large-area perovskite thin film layer comprises the following steps: coating a perovskite precursor solution on a substrate surface to form a first precursor thin film; performing pre-annealing treatment on the first precursor thin film to form a second precursor thin film containing crystal fragments; and applying pressure to the second precursor thin film, wherein the pressure is perpendicular to the film plane of the second precursor thin film, and meanwhile, performing annealing treatment on the second precursor thin film. According to the application, the dislocation, gap and other defects formed in the pre-crystallization state are eliminated by increasing the pressure on the surface of the perovskite thin film when the perovskite is in a small crystalline state, and the crystallization is further improved in the subsequent annealing process, so that a better perovskite thin film is formed, and the open-circuit voltage of a device can be effectively improved. Moreover, the method is simple, can be prepared by using mature large-area process equipment, and is easy to scale up.
Owner:KUNSHAN GCL OPTOELECTRONIC MATERIAL CO LTD

Single molecule manipulation and fluorescence imaging combined device and biomolecule fluorescence observation method

The invention provides a unimolecule manipulation and fluorescence imaging combined device, which comprises a film sample pool, a control unit, a stretching unit and a fluorescence imaging unit, and is characterized in that the film sample pool is provided with an elastic film substrate used for specific coupling of biomolecules; the biomolecules can be elastically stretched and released, so that the coupled biomolecules can be stretched and released along with the biomolecules; the control unit communicates with the stretching unit and the fluorescence imaging unit, receives an operation signal of an operator, and is used for sending a quantitative stretching control signal to the stretching unit according to the operation signal of the operator and starting the fluorescence imaging unit to perform fluorescence observation; the stretching unit is controlled to stretch to a set value according to a feedback signal of the fluorescence imaging unit; the stretching unit is used for stretching an elastic film substrate of the film sample cell from the film plane direction according to a control signal; and the fluorescence imaging unit is used for emitting laser to the film sample cell and detecting a fluorescence signal from the sample cell.
Owner:INSTITUTE OF PHYSICS CHINESE ACADEMY OF SCIENCES

Improved longitudinal cutting and sealing device, longitudinal cutting and sealing system and film packaging machine

Longitudinal cut-seal device (31) for a longitudinal cut-seal system (24) of a film packaging machine (10), wherein the longitudinal cut-seal device (31) comprises a first pair of endless belts (42, 44), wherein the first pair of endless belts (42, 44) is configured to draw an upper (14) and a lower (16) film web between them and guide them in a film plane (18), and wherein the longitudinal cut-seal device (31) further comprises a sealing blade (56) for longitudinally cutting and sealing the upper (14) and the lower (16) film web, wherein the longitudinal cut-seal device (31) comprises a second pair of circulating endless belts (72, 79), wherein the sealing blade (56) is arranged between the first pair of endless belts (42, 44) and the second pair of endless belts (72, 79), wherein the first pair of circulating endless belts (42, 44) extends over at least two first rotational elements (46, 48, 49;51, 53, 54), wherein the second pair of rotating endless belts (72, 79) rotates over at least two second rotating elements (47, 46; 51, 52), wherein the first rotating elements (46, 48, 49; 51, 53, 54) and the second rotating elements (47, 46; 51, 52) have parallel axes of rotation (86, 88), wherein the first pair of endless belts (42, 44) rotates in a first plane of rotation (78), wherein the welding knife (56) extends longitudinally in a plane of welding knife (56), wherein the first plane of rotation (78) and the plane of welding knife are each perpendicular to the film plane (18), characterized in that the first plane of rotation (78) and the plane of welding knife (56) intersect each other at an angle (76), wherein the belt guide (84) each endless belt (72, 79) of the second pair of endless belts (72, 79) obliquely to a respective axis of rotation of the at least two second rotational elements (47, 46;51, 52) extends, wherein a width (92) of the second pair of endless belts (72, 79) is smaller than a width (94) of the first pair of endless belts (42, 44), and wherein the longitudinal separation welding device (31) has a drive device (90), wherein the drive device (90) drives the first pair of endless belts (42, 44) and the second pair of endless belts (72, 79) together.
Owner:BECK PACKAUTOMATEN

A method for synchronous verification of point dose and plane dose in CyberKnife radiotherapy planning

ActiveCN119607445BImage enhancementImage analysisDose verificationComputed tomography
The present invention relates to the technical field of radiotherapy dose verification, and specifically discloses a method for synchronous verification of point dose and plane dose of CyberKnife radiotherapy plan, comprising: constructing a CyberKnife patient dose verification device by a pinpoint ionization chamber, EBT3 film, solid water and a gold mark; using a simulated positioning CT scan verification device to obtain a verification device CT image; importing the verification device CT image into the CyberKnife patient treatment plan to generate a gold mark tracking phantom plan; registering the CT image of the patient radiotherapy plan with the CT image corresponding to the phantom plan, and transplanting the beam information in the patient radiotherapy plan to the phantom plan; using a high-resolution beam tracking algorithm to recalculate the dose distribution of the treatment beam on the phantom plan image; recording the median dose of the sensitive volume of the ionization chamber, and exporting the dose distribution map of the layer where the film plane is located in the phantom plan to perform absolute point dose analysis and plane dose analysis. The present invention can improve the error detection rate of patient plan verification.
Owner:PEKING UNIVERSITY THIRD HOSPITAL (THE THIRD CLINICAL MEDICAL SCHOOL OF PEKING UNIVERSITY)

Film-like graphite, manufacturing method for same, and battery using same

A film-like graphite that satisfies the following condition (1) or condition (2) described below. Condition (1): a graphite crystal orientation degree P is 96% or more with respect to a film plane. Condition (2): a graphite crystal orientation degree P is 94% or more with respect to a film plane and a thickness is 42 μm or more.
Owner:MITSUBISHI CHEM CORP

Tunnel magnetoresistance magnetic detector with out-of-plane magnetic field detection capability

PendingCN119493056ASolve the problem of difficulty in detecting the magnetic field in the out-of-plane directionHave out-of-plane magnetic field detection capabilityMagnetic measurementsElectric/magnetic detectionFilm planeDifferential amplifier
The invention provides a tunnel magnetoresistance magnetic detector with out-of-plane magnetic field detection capability, which comprises a superconducting shielding layer which is of a rectangular superconducting thin film structure, and the direction of an external magnetic field perpendicular to the superconducting shielding layer is changed into the direction parallel to the superconducting shielding layer by utilizing the complete diamagnetism of a superconductor; the two tunnel magnetoresistors are located in edge areas on the two sides below the superconducting shielding layer respectively, the size of each tunnel magnetoresistor is smaller than that of the superconducting shielding layer, and the two tunnel magnetoresistors are the same in magnetic sensitive direction, parallel to the thin film plane of the superconducting shielding layer and used for detecting the magnetic field intensity parallel to the superconducting layer direction; the differential amplifier is used for amplifying differential signals of the two tunnel magnetoresistors; and the signal acquisition system is used for acquiring and processing the amplified differential signals of the two tunnel magnetoresistors. The problem that an existing tunnel magnetoresistor is difficult to detect a magnetic field in the out-of-plane direction is solved.
Owner:INST OF ELECTRICAL ENG CHINESE ACAD OF SCI +1

Biaxially oriented polypropylene film

PCT designated stageWO2026140628A1DielectricPolymer science
A Raman spectrum in the main orientation axis direction of this biaxially oriented polypropylene film demonstrates a Ic / Ip ratio of 0.01% to 10% inclusive, where Ic is the maximum peak intensity in the ranges from 905 to 935 cm-1 and from 770 to 790 cm-1, and Ip is the maximum peak intensity in the range from 800 to 820 cm-1; and demonstrates, when E(T) is the sum of the storage elastic modulus in the main orientation axis direction and the storage elastic modulus in a direction orthogonal to the main orientation axis direction within the film plane at T°C, an E(150) / E(25) of 0.090 to 0.300 inclusive. The present invention addresses the problem of providing a biaxially oriented polypropylene film that has excellent processability and quality, as well as excellent voltage resistance under high-temperature environments, and that is suitably usable as a dielectric in a film capacitor.
Owner:TORAY INDUSTRIES INC

Thin film, hard coating film, method for producing both, image display device, and touch panel

The invention provides a thin film, a hard coating film, a manufacturing method of the thin film and the hard coating film, an image display device and a touch panel. The thickness of the polyester film is 40-500 [mu] m, and the average value of the shear plane vertical stress A in the slow axis direction at the surface layer of 1 [mu] m and the shear plane vertical stress B in the direction orthogonal to the slow axis direction in the film plane is 30-100 MPa.
Owner:FUJIFILM CORP

Pre-Assisting Microwave-Assisted Magnetic Recording With Spin-Torque Nano-Oscillators

ActiveUS20250391428A1Record information storageAssembling head elementsFilm planeMagnetization
The present embodiments relate to a pre-assisting microwave assisted magnetic recording (MAMR) (PA-MAMR) write-head structure where the STO is disposed within a leading shield (LS). The STO can be used to pump energy into the media before the writing process. The STO can also pre-excite the media and let the media oscillation damp over the time and then switch under the writer field. The present embodiments can be easier to increase the magnetic volume and magnetic moment of the free layer, while also achieving a greater oscillation frequency with magnetization oscillations around the axis in the film plane.
Owner:HEADWAY TECHNOLOGIES INC

Calibration member and calibration method

The invention provides a calibration component which comprises N equivalent motifs, the density of the equivalent motifs is the same as that of water, and N is an integer larger than or equal to 3; the M films and the N equivalent die bodies are arranged in a stacked mode, the films and the equivalent die bodies are arranged alternately, and M is an integer larger than or equal to 3; wherein the thickness of the equivalent die body closest to a radiation source in the calibration process is taken as a reference, the N equivalent die bodies are in a thickness change trend of decreasing and then increasing in the stacking direction, the M films are configured to respond to radiation of received rays in the direction perpendicular to the film plane, and different films are arranged according to different distances between the different films and the radiation source. Different doses are absorbed and displayed by different gray values which change discretely, so that the ray energy is calibrated. The invention further provides a calibration method.
Owner:NUCTECH CO LTD +1

Optically anisotropic film and laminate including the same

An optically anisotropic film capable of effectively reducing a difference in hue between a front hue and an oblique hue during white display of an organic EL display device and which exhibits excellent image display properties, and a laminate including the optically anisotropic film are provided. The optically anisotropic film is a cured film of a polymerizable liquid crystal composition containing a polymerizable liquid crystal compound and at least two dichroic dyes, in which the polymerizable liquid crystal compound and the at least two dichroic dyes are cured in a state of being molecularly oriented in a vertical direction with respect to a film plane, and satisfy specific relationships between absorbance of linearly polarized light that oscillates in an x-axis direction and absorbance of linearly polarized light that oscillates in the x-axis direction when the optically anisotropic film is rotated by 500 with the y-axis as a rotation axis.
Owner:SUMITOMO CHEM CO LTD

Method for producing three-dimensionally shaped heating film, heating film, cover plate for headlamp

The invention relates to a method for producing a three-dimensionally shaped heating film (18), comprising the following steps: providing a substrate (20) which extends along a film plane (22) and which has a first substrate region (24) for receiving a heating wire (36) and a second substrate region (26) adjacent to the first substrate region (24), at least one contact site (38) can be or is arranged in the second substrate region (26); arranging at least one connector pad (34) on the substrate (20) in the first substrate region (24); arranging at least one heating wire (36) on the substrate (20) in the first substrate region (24); connecting the at least one connector pad (34) and the at least one heating wire (36); shaping the second substrate region (26) to form a three-dimensional shape deviating from the film plane (22); and arranging at least one additional pad (40) on the substrate (20) in the first substrate region (24) and in the second substrate region (26) in order to connect the at least one contact site (38) and the at least one connector pad (34).
Owner:MARELLI GERMANY GMBH

Metal film plane stress measurement device and method based on picosecond laser ultrasound

The application discloses a picosecond laser ultrasonic-based metal film plane stress measuring device and method, and the device comprises a femtosecond laser, an optical isolator, a 1 / 2 wave plate and a first polarization beam splitter; the first polarization beam splitter divides the incident laser into pump light and probe light, the pump light passes through a frequency doubling assembly and an electro-optic modulator, and the probe light passes through an adjustable optical delay line and a polarization control element, and the pump light and the probe light are combined at a dichroic mirror; the method comprises the following steps: changing the optical path difference of the pump light and the probe light; collecting the reflectivity change and averaging multiple times; performing background removal and digital filtering processing to obtain a smooth echo characteristic signal; applying a peak searching algorithm to determine the time delay corresponding to the first echo, and combining the known film thickness to calculate the longitudinal wave speed; calibrating the speed under different known stress conditions; establishing a speed-stress mapping relationship to obtain the in-plane residual stress value of the metal film. The application realizes sub-picosecond time, micron-level space and non-contact film stress detection.
Owner:TIANJIN UNIV

Method for regulating and controlling residual stress of tellurium-cadmium-mercury epitaxial film

The invention discloses a method for regulating and controlling the residual stress of a tellurium-cadmium-mercury epitaxial film, which is characterized in that the temperature difference in a film placement area is controlled by carrying out simulated temperature measurement and temperature field correction on a heat treatment system, the uniformity of a high-temperature field in a film surface in a heat treatment process is ensured, and the introduction of extra stress caused by non-uniform temperature field in the heat treatment process is inhibited. Through the design of the step heating process and the step cooling process, the real-time temperature field uniformity in the heating process and the cooling process is guaranteed, and introduction of additional stress is avoided; residual stress in the epitaxial growth process is effectively eliminated through the constant-temperature heat treatment step; through thin film edge scratching, an edge stress concentration area caused by faster heat dissipation of the thin film edge in the cooling process is removed. According to the method, the residual stress in the epitaxial film can be effectively removed, meanwhile, new stress is effectively prevented from being introduced in the heat treatment process for removing the stress, and development and production of high-quality tellurium-cadmium-mercury materials and high-performance infrared detectors are supported.
Owner:KUNMING INST OF PHYSICS

A PDLC film material pre-detection system and detection method

The present application relates to the technical field of light control film production, and provides a PDLC film material pre-detection system and a detection method, the detection system comprising a detection platform, a power supply, an image detection component and a control module, the PDLC film material to be detected with a prepositioned copper foil is placed on the detection platform, the power supply is controlled to apply a preset voltage to the PDLC film material so as to expose the defects in the film material before cutting, the image detection component is combined to take an image of the defect area, thereby obtaining the relative position of the defect area in the entire film plane, and then the coordinate position of the defect area is obtained, so as to avoid the defect area during subsequent cutting, and to avoid the waste caused by the detection of defective products after the preparation of conductive silver paste, that is, the pre-detection of the PDLC film material is conducive to cost saving.
Owner:SHANGHAI LONGSHENG PHOTOELECTRIC NEW MATERIAL CO LTD