38results about How to "Good cutoff" patented technology

The invention belongs to the field of image recognition, and particularly relates to a collimating film, an interference-reducing collimating film, a preparation method of the interference-reducing collimating film, an attached collimating film and an image recognition module. In order to solve the problem that two layers of collimating diaphragms in a traditional collimating sheet are difficult to align, the invention provides a collimating film, an interference-reducing collimating film, a preparation method of the interference-reducing collimating film, an attached collimating film and an image recognition module. The collimating film sequentially comprises a collimating lens layer, a flexible substrate layer and a collimating hole layer; the collimating lens layer comprises a micro lens array; the collimating hole layer comprises a shading medium; and the shading medium sequentially comprises a black light-absorbing substance layer, a metal coating and a black light-absorbing substance layer. The interference-reducing collimating film provided by the invention can reduce the light interference phenomenon and improve the image recognition accuracy. The image recognition module provided by the invention is high in recognition accuracy and can be applied to fingerprint unlocking and the like of consumer electronic products such as mobile phones (OLED screens).

The invention relates to a miniature hydrodynamic piezoelectric switch valve which comprises a piezoelectric oscillator, a liquid storage cavity, a driving hole, a flexible valve plug, a valve opening, an inlet, an outlet, a flow passage and driving liquid, wherein the piezoelectric oscillator is arranged at the upper part or the lower part of the liquid storage cavity; the driving hole connected with the liquid storage cavity is formed in the upper part, the lower part or the cavity wall of the liquid storage cavity; the flexible valve plug is arranged on the driving hole and matched with the valve opening; the piezoelectric oscillator, the liquid storage cavity and the flexible valve plug together form a sealed space filled with the driving liquid. The switch valve provided by the invention controls the opening and closing of a valve indirectly by virtue of hydraulic power, can fully utilize the overall deformation of a piezoelectric chip, and has the advantages of high response speed, good cut-off property, high cut-off pressure, low leakage rate and easiness in processing and manufacturing. The piezoelectric driving part and the fluid control part of the switch valve can be separated through a liquid guide tube, and the mounting form is flexible.

A cathode HAS a cathode head in which a surface emitter is arranged that emits electrons upon application of a heating voltage. The surface emitter is fashioned as a parallel surface emitter with at least two emitter surfaces spaced apart from one another, to which at least one electrically conductive cutoff electrode is fed that is galvanically separated from the parallel surface emitter. Such a cathode has a good cutoff capability.

The invention provides an anti-reflection and near-infrared laser prevention resin lens. The anti-reflection and near-infrared laser prevention resin lens comprises a resin lens substrate, a hardening layer and an anti-reflection and near-infrared laser prevention film layer, wherein the substrate, the hardening layer and the anti-reflection near-infrared laser prevention layer are arranged in sequence, the hardening layer is located on the surface of the resin lens substrate, and the anti-reflection layer is located on the surface of the hardening layer; and the anti-reflection near-infrared laser prevention layer is mainly formed by alternately arranging a high-refractive-index material TiO2 layer, a special low-stress silicon boron oxide film layer of a low-refractive-index material layer and a transparent conductive material ITO (Indium Tin Oxide) layer. According to the invention, deeper cut-off (transmission is about 10% or lower) of several main near-infrared band lasers is realized, meanwhile, the temperature resistance and environment resistance of the resin lens for preparing glasses are improved, and the resin lens has good application and market prospects.

A window pane for an automobile includes a single sheet of glass plate and an infrared cutoff film formed on the single sheet of glass plate. A film thickness of the infrared cutoff film on an upper portion of the window pane is greater than the film thickness on a lower portion of the window pane when the window pane is installed in the automobile. A variation from a minimum value in the film thickness on the lower portion to a maximum value in the film thickness on the upper portion is at least 1000 nm per 600 mm in a vertical direction of the window pane when installed in the automobile. The infrared cutoff film is formed on a surface of the single sheet of glass plate by using a flow coating method.

The invention discloses a low-flow exhalation cut-off device, which includes a two-position two-way solenoid valve, the two-position two-way solenoid valve is installed on the solenoid valve seat, and the channel port of the two-position two-way solenoid valve is connected to a One end of the connecting tube, the other end of the connecting tube is connected to the exhalation mechanism of the ventilator. The cut-off function of the experimental equipment small animal ventilator in the exhalation circuit is realized through the two-position two-way solenoid valve. The solenoid valve responds quickly and can quickly and efficiently control the positive end-expiratory pressure of the small animal ventilator, and its cut-off performance is excellent. , rapid response and simple structure, which solves the problems of rapid aging of the traditional pinch valve breathing cut-off device, short maintenance cycle and easy damage to the experimental subjects. The device has a long service life and high safety performance, and can be widely used in scientific research Institutions, universities and other biological experiment fields.

The present invention provides an optical filter capable of providing excellent visible light even when the incident angle becomes large as the profile of equipment equipped with a solid-state imaging device or an ambient light sensor is lowered, and an application thereof. Transmittance, near-infrared cut performance, and heat resistance (reflow resistance) are excellent, and crack resistance is improved. The optical filter of the present invention is characterized in that it has a transparent resin base material and a dielectric multilayer film formed on at least one surface of the base material, and satisfies specific requirements, wherein the transparent resin base material includes A compound (A) having an absorption maximum at a wavelength of 600 nm to 800 nm.

The invention belongs to the technical field of heat dissipation and cooling and particularly relates to a CUP water cooling system circulation pump. A pump cover is arranged on a pump body, and inletvalves and outlet valves are arranged on the pump cover and the pump body. The inlet valves and the outlet valves are butterfly valves. Transducers are connected in a pump body cavity through pump cover body tables and sealing rings, and each transducer is composed of an elastic ring and piezoelectric vibrators stuck to the two sides of the elastic ring. Each piezoelectric vibrator is formed by connecting a base plate and piezoelectric pieces in a sticking manner. Upper pump cavities are formed by the transducers and the pump cover, and lower pump cavities are formed by the sealing rings andthe pump body. The upper pump cavities which are connected in parallel are then in parallel connection with the lower pump cavities which are connected in parallel. At least one piezoelectric vibratorcomprises a driver and a sensor. A power source outputs the same direct-current drive voltage signal to all the piezoelectric vibrators and the drivers, a sensing voltage signal generated by the sensor is used for judging the deformation state of the piezoelectric vibrators, when the sensing voltage reaches the extreme value, the power source drives the voltage and the piezoelectric vibrators tochange deformation directions, and therefore reciprocating bending vibration of the piezoelectric vibrators and one-direction flowing of fluids are achieved.

The invention relates to the power electronic technical field and particularly relates to a terminal unit structure with metal extending and polycrystal stopping field plates and a method for manufacturing the terminal unit structure. The terminal unit structure comprises a first conductive type substrate, a second conductive type field limit ring is arranged in a first main side of the first conductive type substrate, and a first insulation layer is arranged on a first main plane of the first conductive type substrate. The two field plates are disposed on the first insulation layer and cover the two sides of the second conductive type field limit ring. The field plates comprise the polycrystal stopping field plate and the metal extending field plate, and one end of the metal field plate is connected with the polycrystal stopping field plate. According to the terminal unit structure, polycrystals are used as the stopping field plate, metal is used as the extending field plate, the electric field stopping effect is good, breakdown of the first insulation layer brought by electric field extending is prevented, and dependency on the thickness of the first insulation layer is small.

The invention relates to a symmetrical spiral linear valve piezoelectric pump. The symmetrical spiral linear valve piezoelectric pump comprises piezoelectric vibrators (1), pump covers (2), valve seats (3), screws (4), a pump base (6), sealing rings (7), sealing rings (8) and screws (9). The pump covers (2) are arranged on the top of the pump base (6). The valve seats (3) are arranged at the upper end of the pump base (6). Each sealing ring (7) is arranged between the corresponding valve seat (3) and the pump base (6). Each sealing ring (8) is arranged between the corresponding valve seat (3) and the corresponding pump cover (2). The piezoelectric vibrators (1) are arranged on the tops of the valve seats (3), each piezoelectric vibrator (1) is arranged between the corresponding valve seat (3) and the corresponding pump cover (2), and each piezoelectric vibrator (1) is fixedly connected with the corresponding pump cover (2), the corresponding valve seat (3) and the pump base (6) through the corresponding screw (9). A pair of symmetrical spiral linear one-way valves (5) which are mutually inverted is installed at the positions of inlets and outlets of the valve seats (3) through the screws (4). The structure is simple, cost is low, and opening and closing of the piezoelectric pump can be effectively achieved.

The invention belongs to the field of microfluid transmission and control and particularly relates to a double-vibrator self-excited pump. A sensor is mounted in a pump body, upper and lower inlet valve cavities of the pump body and butterfly valves adhered to the valve cavities separately form upper and lower inlet valves while upper and lower outlet valve cavities and butterfly valve adhered tothe valve cavities separately form upper and lower outlet valves, and the butterfly valves are formed by adhering pressure rings, valve blocks and valve seats; pump covers are mounted on the upper andlower sides of the pump body and press and connect vibrators in the upper and lower cavities separately to upper and lower cavities of the pump body through seal rings, the vibrators in the upper andlower cavities are formed by adhering substrates and piezoelectric plates, and the sensor and the vibrators in the upper and lower cavities are connected to a power supply through different guide wire groups; the vibrators in the upper and lower cavities, the seal rings, the upper and lower inlet valves and the upper and lower outlet valves form parallel upper and lower pump cavities; the power supply outputs direct current voltage, and when the fluid pressure reaches an extreme value, the output voltage of the power supply and the transformation directions of the vibrators in the upper and lower cavities are reversed. The double-vibrator self-excited pump has the advantages that excitation frequency is formed automatically according to the change state of the fluid pressure of the pump cavity, and the valve is high in efficiency and high in output ability and control precision.

The invention relates to a sine and cosine linear valve piezoelectric pump. The sine and cosine linear valve piezoelectric pump comprises a piezoelectric vibrator (1), a pump cover (2), a valve seat (3), screws (4), a pump seat (6), a sealing ring (7), a sealing ring (8) and screws (9), wherein the pump cover (2) is arranged on the top of the pump seat (6); the valve seat (3) is arranged at the upper end of the pump seat (6); the sealing ring (7) is arranged between the valve seat (3) and the pump seat (6); the sealing ring (8) is arranged between the valve seat (3) and the pump cover (2); the piezoelectric vibrator (1) is arranged on the top of the valve seat (3), is arranged between the valve seat (3) and the pump cover (2), and is fixedly connected with the pump cover (2), the valve seat (3) and the pump seat (6) through the screws (9); and a pair of sine and cosine linear one-way valves (5) inverted to each other is respectively mounted at an inlet and an outlet of the valve seat (3) through the screws (4). The sine and cosine linear valve piezoelectric pump has the advantages of high efficiency, large flow, simple structure, convenience in installation, low cost and the like.

PROBLEM TO BE SOLVED: To obtain a near-infrared ray cut filter which has a wide viewing angle, is superior in near-infrared ray cutting capability, has a low hygroscopicity, and is free from foreign matters and warpage.SOLUTION: The near-infrared ray cut filter includes a resin substrate (I) containing a compound (I) which has a structure derived from a compound expressed by a formula (I).

The present invention relates to a near-infrared cut filter and a device using the near-infrared cut filter. The object is to obtain a near-infrared cut filter having a wide viewing angle, excellent near-infrared cut ability, low hygroscopicity, and no foreign matter or warp. The near-infrared cut filter is characterized in that the transmittance satisfies the following (A) to (D): (A) in the range of wavelength 430-580nm, the average value of the transmittance is 75% or more; (B) at the wavelength In 800-1000nm, the average transmittance is 20% or less; (C) the longest wavelength at which the transmittance is 70% in the wavelength region below 800nm, and the longest wavelength at which the transmittance is 30% in the wavelength region above 580nm The absolute value of the difference in the shortest wavelength is less than 75nm; (D) In ​​the range of wavelength 560-800nm, the wavelength value at which the transmittance is 50% when measured from the vertical direction, and measured from an angle of 30° relative to the vertical direction The absolute value of the difference of the wavelength values ​​at which the transmittance is 50% is less than 15 nm.

The invention discloses a night vision compatible filter with high and low temperature resistance and high visible light transmission and a preparation method. The night vision compatible filter has a layered structure and includes a near-infrared absorption layer and an antireflection film layer, and the antireflection film The thickness of the anti-reflection film layer is 40-90 μm, and the thickness of the near-infrared absorption layer is 0.5-1 mm; the preparation method includes the preparation of the near-infrared absorption layer, the preparation of the anti-reflection protective coating and the night vision Compatible with steps such as filter preparation. The night vision compatible filter provided by the invention has excellent high and low temperature resistance performance, and the night vision compatible filter has good cut-off performance for light in the range of 650-900 nm, and its average transmittance is only 0.2%, And the transmittance in the visible light region of 400 to 630 nm is more than 50%. The preparation method provided by the invention has a simple process, and the prepared night vision-compatible optical filter takes into account high and low temperature environment resistance, near-infrared absorption and high visible light transmittance.