192 results about "Image intensifier" patented technology

The invention discloses a speed measurement method based on single-frame multiple exposure, and belongs to the field of hypersonic velocity field measurement. The implementation method comprises the following steps: recording equal time interval change of molecular marking in a flow field along with movement of the flow field through single-frame multi-time exposure imaging of an image enhancement camera, and realizing continuous and rapid acquisition of speed information within a short time after single-time marking. The morphological position after the time interval is determined according to the molecular marker, and the velocity field with spatial resolution in the flow field is extracted by mapping the marker before and after displacement, so that the velocity measurement precision is improved. Compared with other two-dimensional velocity field acquisition methods based on femtosecond laser molecular marker tracing velocity measurement, the method provided by the invention does not need a complex focusing lens combination, can obtain spatial positions of molecular markers at different moments only through isochronous continuous triggering exposure of a camera, thereby obtaining velocity flow field displacement information. And corresponding acceleration information can be further deduced according to the obtained velocity field. The method is especially suitable for hypersonic velocity field measurement.

The invention discloses a synchronous clock correction device and method for a time-gated spectral measurement and optical imaging system, and the device comprises a pulse laser, a sample stage, a spectrometer, an image intensifier, a detector, a delayer, a gating module, a control computer, and a synchronous correction module. The pulse laser outputs sample exciting light to the sample table, the spectrograph, the image intensifier and the detector, one path of a synchronous trigger signal is output to the synchronous correction module, and the other path of the synchronous trigger signal is transmitted to the image intensifier through the delayer and the gating module; detecting a gating signal through a synchronous correction module, comparing a time difference between the gating signal and a synchronous trigger signal to obtain a delay adjustment value, and adjusting a delayer through a control computer, so that the time when the gating signal starts an image intensifier is consistent with the time when an optical signal generated after a sample is excited to reach the image intensifier; according to the invention, the influence of temperature drift in an electronic system is reduced, the stability of the system is improved, and the measurement error is reduced.

A method and system for determining concentricity of a multiple layer golf ball are disclosed herein. One or more images of a golf ball are generated using an X-ray source, a camera or a digital detector, and an image intensifier. An edge detection algorithm is preferably utilized. The method also includes calculating Y,Z center coordinates of the a best fit diameter or ellipse of the inner edge layer and outer edge layer of the multiple layer golf ball.

A system and a method for a computer implemented method of image enhancement includes the steps of receiving an input image, wherein the input image is a low light image, processing the input image, by a pre trained image enhancer, to generate an initial enhanced image, accessing, from an image memory, a response value corresponding to a sample specific property a normal image, generating an adjustment factor based on the response value from the image memory, generating a final enhanced image by applying the adjustment factor to the initial enhanced image.

We present a ground-based laser system for searching, ranging, and tracking that actively illuminates small resident space objects (RSOs) in low Earth orbit (LEO) and observes position and transit-time of reflections, enabling orbital custody of most one-to-few centimeter-sized objects. A diode-pumped alkali laser (DPAL) augmented with mode-locking and Q-switching serves as an illuminator and offers exceptionally high spectral brightness due to its output beam's sub-nanosecond pulse duration and picometer-level spectral linewidth. Kilohertz fast-rastering enables interrogations of distinct few-meter-sized sky-patches at megahertz rates. Paired on the observation side with one or more telescopes outfitted with Faraday anomalous dispersion optical filters (FADOFs), image intensifiers, multi-pixel arrays, and nanosecond timing, the combined system could offer nearly background-free discoveries of RSOs every hour, even during daytime. Periodically re-flashing previously discovered objects to maintain orbit custody expends only a small fraction of total observing time.

The invention provides a noise modeling and denoising method for a low-light-level image intensifier. The noise modeling and denoising method comprises the following steps: step 1, establishing an imaging noise model for the low-light-level image intensifier; step 2, collecting output data of the low-light image intensifier under different illumination conditions, calibrating parameters of an imaging noise model, and superposing the calibrated imaging noise model on a noise-free image sample to construct a training data set conforming to actual imaging characteristics; step 3, designing an image denoising network based on the convolutional neural network, the input of the network being a noise-containing image, and the output being a noise-suppressed clean image; and step 4, training and optimizing the convolutional neural network based on the training data set, and verifying synthetic data and real data. According to the method, the adaptive capacity and generalization performance of the neural network to complex noise can be effectively enhanced, and finally, more accurate and stable image enhancement and denoising effects can be realized in a low-light imaging scene.

The invention discloses a single molecule microscopic imaging industrial camera imaging system and imaging method. The system comprises an inverted fluorescence microscope, a laser light source, a coupler, a light source adjusting device, an optical filter, an objective lens, a CMOS camera, a microcomputer processing system and an image enhancement device. The inverted fluorescence microscope is used for laser scanning confocal microscopic imaging or single molecule PALM microscopic imaging; the laser light source is used for providing incident light for the camera system; the coupler is used for obtaining high-power excitation and activation laser to enter the microscope system; the light source adjusting device is used for switching light sources; the optical filter is used for collecting the maximum fluorescence signal and blocking the exciting light at the same time; the objective lens is used for total internal reflection of light beams on the sample surface; the CMOS camera is used for photographing to obtain an image; the image intensifier is used for intensifying the image. And the microcomputer processing system carries out picture synthesis and result output through a preset correction algorithm. According to the invention, the living cell single-molecule trajectory detection efficiency can be improved.

Image intensifier systems incorporating a microchannel plate (MCP) and methods for producing the same are disclosed. A device is disclosed that includes a first substrate having a radiation-receiving first surface and an opposed second surface through which electromagnetic radiation is transmitted. A second substrate is coupled to the first substrate to define a vacuum cavity therebetween having electron-emitting photocathode is disposed therein. A microchannel plate (MCP) is disposed within the vacuum cavity and defines microchannels extending from an input end to an output end. Each of the microchannels is configured to generate / amplify electrons in response to the electrons received photocathode. The imaging array can include a plurality of metal plates connected to capacitors and configured to collect electrons from the MCP to produce a digital image responsive to electromagnetic radiation received at the first substrate and converted to electrons by the photocathode and multiplied by the MCP.

An apparatus, system and method is provided for producing stacked wafers containing an array of image intensifiers that can be evacuated on a wafer scale. The wafer scale fabrication techniques, including bonding, evacuation, and compression sealing concurrently forms a plurality of EBCMOS imager anodes with design elements that enable high voltage operation with optional enhancement of additional gain via TMSE amplification. The TMSE amplification is preferably one or more multiplication semiconductor wafers of an array of EBD die placed between a photocathode within a photocathode wafer and an imager anode that is preferably an EBCMOS imager anode bonded to or integrated within an interconnect die within an interconnect wafer.

A low-light night vision device includes a first monocular assembly. The first monocular assembly includes: a housing including a lens barrel and a front cover plate mounted to the lens barrel; a low-light objective lens group mounted on the front cover plate; an image intensifier bracket arranged at a rear end of the low-light objective lens group, and including a mounting barrel, an adjustment thread ring and an elastic member, the mounting barrel configured to allow an image intensifier to be mounted therein; an eyepiece group arranged at the rear end along the low-light optical axis. The adjustment thread ring is connected to the front cover plate and the mounting barrel, respectively, with threaded connections in opposite directions, so that the mounting barrel and the front cover plate move toward or away from each other along the low-light optical axis upon rotation of the adjustment thread ring.

The invention discloses an imaging system and an imaging method based on low-light sub-pixel dislocation sampling, which are used for solving the technical problem that the image resolution is easy to degrade due to under-sampling during the sampling of the existing image enhanced ICCD or ICMOS camera. The imaging system comprises a sampling unit, a rotary table and an upper computer, wherein a TDI-ICMOS camera in the lighting unit is formed by coupling an image intensifier and a TDI-CMOS detector, n rows of photosensitive channels which are distributed in parallel are arranged in the TDI-CMOS detector, and every two adjacent rows of photosensitive channels are sequentially staggered by # imgabs 0 # pixels in the row direction and are sequentially spaced by # imgabs 1 # pixels in the TDI push-broom direction; the rotary table is used for installing a camera, and the upper computer carries out fusion enhancement on images. According to the TDI-ICMOS camera, n low-light push-broom images with sub-pixel relative displacement can be obtained only by using a push-broom imaging mode under the cooperation of the turntable, so that a foundation is laid for fusing, enhancing and improving the signal-to-noise ratio and MTF (Modulation Transfer Function).

This invention discloses an all-weather reconnaissance and alarm device, comprising a laser illumination component, an ICCD / ICMOS gating component, and an integrated processor. The laser illumination component uses high peak power pulsed laser light for illumination assistance, enhancing target brightness. The ICCD / ICMOS gating component is used to achieve high-gain photoelectric conversion of weak optical signals. Specifically, the ICCD / ICMOS gating component eliminates or reduces the influence of sunlight through "ultrafast adaptive imaging + light decay," enabling the component to operate in the linear region with the optimal signal-to-noise ratio for the target. Simultaneously, the ICCD / ICMOS gating component integrates a high-speed CCD / CMOS image sensor. Without changing the delay time, a higher image intensifier repetition frequency results in a smaller increase in delay time. Through ultra-high-speed image acquisition, it fully utilizes the energy of each laser pulse, enabling imaging of targets at different distances and high-speed moving targets. The integrated processing component focuses on controlling the ultrafast adaptive adjustment duration, the interval between auxiliary illumination and gating opening, and high-precision gain control.

We present a ground-based laser system for searching, ranging, and tracking that actively illuminates small resident space objects (RSOs) in low Earth orbit (LEO) and observes position and transit-time of reflections, enabling orbital custody of most one-to-few centimeter-sized objects. A diode-pumped alkali laser (DPAL) augmented with mode-locking and Q-switching serves as an illuminator and offers exceptionally high spectral brightness due to its output beam's sub-nanosecond pulse duration and picometer-level spectral linewidth. Kilohertz fast-rastering enables interrogations of distinct few-meter-sized sky-patches at megahertz rates. Paired on the observation side with one or more telescopes outfitted with Faraday anomalous dispersion optical filters (FADOFs), image intensifiers, multi-pixel arrays, and nanosecond timing, the combined system could offer nearly background-free discoveries of RSOs every hour, even during daytime. Periodically re-flashing previously discovered objects to maintain orbit custody expends only a small fraction of total observing time.

The invention provides a photon event camera, which comprises an acquisition module and a processing display module, and is characterized in that the acquisition module is used for acquiring photon events and comprises an image intensifier, a coupling light cone, a sensor and a gating unit; the image intensifier is used for amplifying an incident weak light signal, the coupling light cone is connected with the image intensifier and the sensor and is used for transmitting the amplified light signal, and the sensor receives and detects the amplified light signal and then outputs a detection signal; the sensor outputs a plurality of pixel event clusters generated by the plurality of photon signals as detection signals to the upper computer; the processing display module identifies a pixel event group formed by a single photon signal as a photon event, identifies a plurality of pixel event groups generated by a plurality of photon signals as a plurality of photon events, and displays and outputs the photon events corresponding to a space coordinate and a time coordinate. The method is suitable for measuring photon signals in a weak light scene, and has single-photon-level sensitivity; and the method is small in generated data volume, low in data volume and suitable for long-time acquisition.

The invention discloses a high-precision detection system and a high-precision test method for the uniformity of an output image of a low-light-level image intensifier. In the system and the method, an image output by an anode of an image intensifier is imaged on a focal plane by an optical lens, an imaging light spot is divided into two paths by a semi-transparent and semi-reflecting mirror: one path forms an imaging area observation light path through a magnifying lens and a camera or human eyes, and is used for selecting and confirming a test area and a scanning starting and ending point; the other path of light enters a high-precision detector after passing through an adjustable diaphragm, the output light current of the high-precision detector is converted into a voltage signal through a micro-current meter, and the voltage signal is acquired in real time by an acquisition card in the process that the one-dimensional operating mechanism scans along the horizontal diameter direction of the output image of the image intensifier at a constant speed, so that an output image uniformity curve is generated; and obtaining an image uniformity test value through the ratio of the maximum value to the minimum value of the curve. According to the invention, superposition errors caused by light source nonuniformity and pixel inconsistency are reduced, and high-precision and repeatable uniformity measurement consistent with human eye impression is realized by a test result.

The utility model discloses a multiple adjustment night vision lens for optical experiments, which belongs to the field of optics and comprises a low-light night vision device composed of an objective lens, an image intensifier and an eyepiece, the objective lens is connected with the eyepiece through a connecting tube, and the image intensifier is located inside the connecting tube. Compared with the prior art, the utility model has the advantages that the distance between the objective lens and the image intensifier is adjusted through the engagement connection of the displacement thread at the outer wall end of the objective lens and the translation screw at the output end of the brushless motor, and the brushless motor is controlled by the remote control system; in this way, the angle needing to be rotated can be rapidly determined according to the displacement data of the displacement thread of the objective lens, and rapid rotation is completed through the brushless motor, so that the adjustment data of the magnification of the objective lens is greatly increased.

The utility model discloses a general image tube power supply system which comprises an auxiliary board, a manual gain control extension line or a gain adjustment PCB connecting piece, a jack P1 and a jack P4 which are symmetrically arranged on two sides of the front end of the auxiliary board corresponding to a contact of an image intensifier, and a power supply contact pin P1 and a power supply contact pin P4 which can be respectively plugged in and pulled out of the jack P1 and the jack P4. The two power supply contact pins can be in direct contact with contacts of an existing image intensifier, three jacks are formed between the auxiliary plates between the jack P1 and the jack P4, the jack P2, the jack P5 and the jack P3 are sequentially arranged from the jack P1 to the jack P4, the power supply contact pin P2, the power supply contact pin P5 and the power supply contact pin P3 can be sequentially inserted into and pulled out of the three jacks respectively, and the power supply contact pin P2, the power supply contact pin P5 and the power supply contact pin P3 can be inserted into and pulled out of the jack P4. The power supply contact pin P2, the power supply contact pin P5 and the power supply contact pin P3 are used for increasing the gain effect of the image intensifier, the power supply contact pin P2 and the power supply contact pin P3 are used in cooperation with the manual gain control extension line, and the gain adjustment PCB connecting piece can be electrically connected with the image intensifier and the auxiliary board.

The invention belongs to the technical field of night vision devices, and particularly discloses a four-eye night vision device. Two image intensifiers are arranged in a main lens frame of the four-eye night vision device, a circuit board is arranged between the two image intensifiers, two objective lenses are fixed to the object side of a lens body, an ocular lens is connected to the image side of the lens body, two ocular lens sets are arranged in an ocular lens frame, and an ocular lens clamping sleeve is fixed to the image side of the ocular lens frame; the objective lens seat extends into the main lens frame and abuts against the image intensifier, the objective lens group is in threaded connection with the objective lens seat, the objective lens pressing ring is in threaded connection with the main lens frame and abuts against the objective lens seat, the focusing hand wheel is fixed on the objective lens group, a flange plate is arranged on the image side of the objective lens seat, the image side of the objective lens pressing ring abuts against the flange plate, and a sealing ring I is arranged between the image side of the objective lens pressing ring and the flange plate. The objective lens pressing ring abuts against the flange plate of the objective lens seat and is in threaded connection with the main lens frame, and the objective lens group is in threaded connection with the objective lens seat, so that the objective lens is convenient to connect and adjust, and the device has the characteristics of compact structure, light weight, convenience in installation, reliability in connection and low cost.

The present invention discloses a high-resolution and high-uniformity fiber optic image inverter and its preparation method and application. The preparation method includes: preparing single filaments and sleeve light-absorbing filaments: matching a core material glass rod with a high refractive index and a cladding glass tube with a low refractive index and then performing single-filament drawing to obtain the drawn single filaments, where the filament diameter of the single filaments is Φ2.8 - 4.0 mm; matching a light-absorbing material glass rod and a cladding glass tube with a low refractive index and then drawing them into sleeve light-absorbing filaments, where the filament diameter of the sleeve light-absorbing filaments is the same as that of the single filaments; performing primary multi-filament drawing; performing secondary multi-filament drawing; hot melt pressing and twisting forming. The fiber optic image inverter has a transmittance > 70% and a transmittance uniformity < 5% in the wavelength range of 400 - 700 nm. The fiber optic image inverter can be applied to low-light level image intensifiers.

The present application provides an ICMOS-based adaptive multi-mode ultraviolet imaging detection system, including an image intensifier, a CMOS image sensor, an FPGA and a host computer; the light signal passes through the image intensifier to form an optical image, which is collected by the CMOS image sensor and sent to the host computer via the FPGA; the working process of the system includes: judging the brightness of the current detection environment, when the detection environment brightness is strong, using the CMOS image sensor to directly image; when the detection environment brightness is weak, the CMOS image sensor processes the image and performs photon counting imaging. The advantages of the present application are: through the adaptive multi-mode imaging method, the system can automatically adjust the imaging mode according to different light intensity environments to achieve real-time and efficient detection of ultraviolet signals; the system integrates FPGA as the control core, which can realize automatic control and real-time data processing, and improve the stability and reliability of the system.

A control circuit and method 200 may be provided for regulating a luminous gain of an image intensifier. The control circuit and method may perform automatic brightness control by regulating (240) a luminous gain of the image intensifier to maintain an output brightness at or below a desired maximum output brightness level. When a sudden increase in the scene brightness causes the output brightness to exceed the desired maximum output brightness level, the control circuit and method may deactivate (250) the photocathode and interrupt the automatic brightness control, reduce (260) the luminous gain of the image intensifier in accordance with a first gain reduction parameter and after reducing the luminous gain, reactivate (270) the photocathode and resume the automatic brightness control.

The present application provides an image intensifier tube circuit board, an image intensifier tube module, and a night vision device. The image intensifier tube circuit board comprises a circuit substrate and an image intensifier tube electrical connection structure arranged on the circuit substrate. The image intensifier tube electrical connection structure comprises a positive spring contact and a negative spring contact which are fixedly arranged on the circuit substrate, and at least one of the following optionally arranged on the circuit substrate: an intermediate spring contact, a plug connector, and crown spring connectors. The arrangement of at least one of the intermediate spring contact, the plug connector, and the crown spring connectors enables electrical connection with image intensifier tubes of other models, thereby allowing compatibility with image intensifier tubes of multiple models, and allowing users to upgrade the performance of existing night vision devices by replacing existing image intensifier tubes with image intensifier tubes of different models.

There is disclosed a gated power supply for a night vision system includes an input terminal to receive source power, and output terminal to electrically couple to a photocathode, a first voltage source to source a positive or neutral voltage to the photocathode, a second voltage source to source a large negative voltage to the photocathode, and a switching circuit to switch between the first voltage source and the second voltage source on a duty cycle, wherein the switching circuit comprises an optical switch.

A method and system for determining concentricity of a multiple layer golf ball are disclosed herein. One or more images of a golf ball are generated using an X-ray source, a camera or a digital detector, and an image intensifier. An edge detection algorithm is preferably utilized. The method also includes calculating Y,Z center coordinates of the a best fit diameter or ellipse of the inner edge layer and outer edge layer of the multiple layer golf ball.

The invention discloses a high-speed flow velocity acquisition method based on stripe imaging, and belongs to the technical field of aerodynamics test. The purpose of improving the high-speed flow velocity measurement precision is achieved. A measurement system is established and comprises a femtosecond laser, a multi-pass compressor, a reflector I, a reflector II, a reflector III, a plano-concave lens, a plano-convex lens, a high-speed camera, an image intensifier, a telephoto lens, a fixed connection device, a computer device and a synchronous signal generator. Constructing a time sequence control and multi-delay gating acquisition method; calculating a scale conversion parameter; a sequential control and multi-delay gating acquisition method is utilized, an image is acquired based on a measurement system, image processing is carried out based on a corresponding relation between image pixel coordinates and actual physical sizes, and the high-speed flowing speed based on fringe imaging is calculated. The method is clear in process, high in system integration level and suitable for speed measurement under the transient high-speed flow condition, and has good engineering applicability and measurement reliability.

This invention relates to a quartz optical window for enhancing solar-blind ultraviolet detection, its fabrication method, and its application. The method includes: etching a periodic array of hollow micro / nano structures with gradually changing morphology on the emitting end face of a quartz substrate with high transmittance in the solar-blind ultraviolet band; cleaning to obtain a quartz element; depositing a solar-blind ultraviolet-transmittance thin film material as the filling material for the hollow structure on the emitting end face of the obtained quartz element; polishing the coated emitting end face to obtain a functional layer of a periodic array of micro / nano structures with a period of 100nm–300nm, a thickness of 80nm–300nm, and a duty cycle greater than or equal to 0.5; cleaning to obtain a quartz optical window for enhancing solar-blind ultraviolet detection with the periodic array of micro / nano structures. This invention improves the quantum efficiency of the cesium telluride photocathode in a solar-blind ultraviolet image intensifier by using a quartz optical window with a micro / nano structure functional layer, thereby improving the cathode sensitivity and achieving long-distance, high-definition detection.

A method and system for determining concentricity of a multiple layer golf ball are disclosed herein. One or more images of a golf ball are generated using an X-ray source, a camera or a digital detector, and an image intensifier. An edge detection algorithm is preferably utilized. The method also includes calculating Y,Z center coordinates of the a best fit diameter or ellipse of the inner edge layer and outer edge layer of the multiple layer golf ball.

A night vision system along with an image intensifier tube having a microchannel plate and method of forming the microchannel plate are provided. The microchannel plate comprises a plurality of spaced channels extending through the microchannel plate, wherein each channel sidewall surface near the input face of the microchannel plate comprises a series of layers formed thereon. The input face of the microchannel plate, as well as the sidewall surfaces of each channel near the input surfaces, are configured with an electron backscatter layer arranged between a contact metal layer and a secondary electron booster layer. When formed partially into the channel openings near the input face, the electron backscatter layer and overlying secondary electron booster layer are configured circumferentially around the sidewall surfaces and extend radially inward toward a central axis of each channel.

The invention relates to a micro-channel plate, in particular to an electron beam focusing method of the micro-channel plate, the micro-channel plate and an image intensifier, and solves the technical problem that the spatial resolution of the image intensifier is reduced due to the fact that the existing micro-channel plate is easy to generate an electron beam spot expansion effect. According to the electron beam focusing method of the micro-channel plate provided by the invention, the insulating dielectric layer and the modulation electrode are arranged outside the output electrode of the existing micro-channel plate, and different working voltages are applied to the output electrode and the modulation electrode, so that an electric field with electron beam focusing capability is formed between the two electrodes; the electron beams emitted by each micro-channel are focused and shaped, so that the size of an electron beam spot is reduced, and the spatial resolution is improved. Meanwhile, the modulation electrode changes the electric field distribution condition at the output electrode, so that more multiplied electrons can be emitted, and the electron gain of the micro-channel plate can be improved.

The utility model discloses a corona discharge observation recorder which comprises a camera and a lens mount which are connected with each other, an image sensor is arranged in the camera, and an ultraviolet image intensifier, a first lens assembly, a first solar blind optical filter and a low-transmittance optical filter are movably arranged on the lens mount. Wherein the first solar blind optical filter and the low-transmittance optical filter are located in front of the ultraviolet image intensifier and the first lens assembly. The corona discharge observation recorder provided by the utility model has the advantages of simple structure, no need of light splitting, no energy loss problem caused by light splitting, and clear formed images.