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60results about How to "Meeting Imaging Needs" patented technology

Single cigarette empty head detection method based on machine vision and special equipment

The invention discloses a single cigarette empty head detection method based on machine vision. The method comprises the following steps: (1) acquiring and processing a cigarette image by an endoscope, thus acquiring a preprocessed image P1; (2) extracting and processing a blue channel image P4 of the image P1; (3) preliminarily determining the position of the center of a circle of a cigarette in the image; (4) preliminarily determining the position of the cigarette to be detected in the image, and fitting the circle center coordinates and the radius in an area in which the cigarette is positioned; (5) judging the cigarette area is a filter tip or a cigarette head; (6) determining a boundary point between cut tobacco and cigarette paper of the cigarette; and (7) calculating the distance between the inner and outer boundary points, wherein if the distance is less than a certain threshold value, the cigarette is considered to be qualified, otherwise, the cigarette is an empty head cigarette and is removed. The invention also discloses special equipment for the detection method. According to the method, the cigarette image is acquired by the endoscope, and due to accurate computer processing, the single cigarette empty head can be accurately and rapidly detected.
Owner:NANJING WENCAI SCI & TECH

Optical lens and imaging device

The invention discloses an optical lens and an imaging device. The optical lens sequentially comprises a diaphragm, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lensand a seventh lens from an object side to an imaging surface along an optical axis, wherein the first lens has positive refractive power, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface; the second lens has negative refractive power, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; the third lens has positive refractive power, and the object side surface of the third lens is a convex surface near the optical axis, and the image side surface of the third lens is a concave surface near the optical axis; the fourth lens has negative refractive power, and the object side surface of the fourth lens is a concave surface, and the image side surface of the fourth lens is a convex surface; the fifth lens has positive refractive power, and the object side surface of the fifth lens is a concave surface, and the image side surface of the fifth lens is a convex surface; the sixth lens has positive refractive power, and the object side surface of the sixth lens is a concave surface, and the image side surface of the sixth lens is a convex surface; and the seventh lens has negative refractive power, and the object side surface of the seventh lens is a concave surface near the optical axis, and the image side surface of the seventhlens is a concave surface near the optical axis. According to the optical lens provided by the invention, by reasonably matching the surface type and refractive power of each lens, the balance of miniaturization and high pixel of the lens can be better realized.
Owner:JIANGXI LIANYI OPTICS CO LTD

Self-adaptive multimode X-ray CT imaging scientific research experimental platform

The invention relates to a self-adaptive multimode X-ray CT imaging scientific research experimental platform. The CT platform is characterized by comprising a bearing table, a center carrying rotary table assembly, an X-ray generator and location moving assembly, an X-ray detector and location moving assembly and a distance measuring assembly; the bearing table supports all other assemblies and an imaging object; the center carrying rotary table assembly is located at the center of the bearing table; the X-ray generator and location moving assembly is located on the right side of the center carrying rotary table assembly; the X-ray detector and location moving assembly is located on the left side of the center carrying rotary table assembly; the distance measuring assembly is located on the rear side of the center carrying rotary table assembly; the center carrying rotary table assembly comprises a carrying table, a connecting shaft, a coupler, a rotary table driving motor and a location switch; the carrying table is in a disc shape and is located on the surface of the bearing table; the connecting shaft penetrates through the surface of the bearing table, the upper portion of the connecting shaft is connected with the center point of the carrying table, and the lower portion of the connecting shaft is connected with the rotary table driving motor through the coupler.
Owner:韩立

Special multichannel radio frequency echo signal down converter for MR-EPT spectrometer

The invention discloses a special multichannel radio frequency echo signal down converter for an MR-EPT spectrometer, and belongs to the field of MR-EPT imaging. The down converter comprises a local oscillator signal generation module, a power division module and a frequency-mixing amplitude-modulation phase-modulation unit which are connected in sequence, and a control module for controlling thefrequency of a local oscillator signal output by the local oscillator signal generation module and controlling the frequency-mixing amplitude-modulation phase-modulation unit to adjust the amplitude and phase of an output signal. The frequency mixing amplitude modulation and phase modulation unit comprises a plurality of radio frequency amplitude modulation and phase modulation modules. The radiofrequency amplitude modulation and phase modulation module comprises a radio frequency signal processing module for performing sideband suppression and impedance matching on a radio frequency echo signal, which are connected in sequence; a frequency mixing module used for carrying out frequency mixing on multi-channel local oscillation signals output by the power dividing module and radio frequency signals output by the radio frequency signal processing module, a filtering module, an amplifying module, a phase modulation module controlled by the control module to carry out phase shift, and anamplitude modulation module controlled by the control module to carry out amplitude modulation. The problem that an existing magnetic resonance spectrometer cannot be used for MR-EPT imaging in a 9.4T ultrahigh magnetic field environment is solved.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA

Prime lens and imaging equipment

The invention discloses a prime lens and imaging equipment, and the prime lens sequentially comprises, from an object side to an imaging surface along an optical axis, a first lens with negative focal power, whereinthe object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface; a second lens having negative focal power, wherein the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; a third lens having positive focal power, wherein the object side surface of the third lens is a convex surface, and the object side surface and the image side surface of the third lens are respectively provided with an inflection point; a diaphragm; a fourth lens having positive focal power, wherein the object side surface of the fourth lens is a concave surface, and the image side surface of the fourth lens is a convex surface; a fifth lens having positive focal power, wherein the object side surface and the image side surface of the fifth lens are convex surfaces; a sixth lens having negative focal power, wherein the object side surface of the sixth lens is a concave surface, and the image side surface of the sixth lens is a convex surface; and a seventh lens having positive focal power, wherein the object side surface of the seventh lens near the optical axis is a convex surface, the image side surface of the seventh lens near the optical axis is a concave surface, and the object side surface and the image side surface of the seventh lens have inflection points. The prime lens has the advantages of large aperture, miniaturization, light weight, ultra-large wide angle and the like.
Owner:合肥联创光学有限公司

Optical imaging lens and imaging equipment

The invention discloses an optical imaging lens and an imaging device. The optical imaging lens sequentially comprises from an object side to an imaging surface along an optical axis: a diaphragm; a first lens with negative power, wherein the object side surface of the first lens is a concave surface, and the image side surface of the first lens is a convex surface; a second lens with positive focal power, wherein the image side surface of the second lens is a convex surface; a third lens with positive focal power, wherein the object side surface and the image side surface of the third lens are convex surfaces; a fourth lens with positive focal power, wherein the object side surface and the image side surface of the fourth lens are convex surfaces; a fifth lens with negative focal power, wherein the object side surface and the image side surface of the fifth lens are concave surfaces, and the fourth lens and the fifth lens are glued into a bonded body; a sixth lens with positive focal power; and a seventh lens with negative focal power, wherein the object side surface of the seventh lens is a convex surface near the optical axis, and the image side surface of the seventh lens is a concave surface near the optical axis. The optical imaging lens has the advantages of large aperture, high relative illumination, high resolution and high imaging quality.
Owner:JIANGXI LIANCHUANG ELECTRONICS CO LTD

Wide-angle lens and imaging equipment

ActiveCN112882209AEffectively correct curvature of fieldReduce volumeOptical elementsOphthalmologyOptical axis
The invention discloses a wide-angle lens and imaging equipment, and the wide-angle lens sequentially comprises a first lens with negative focal power from an object side to an imaging surface along an optical axis, wherein the object side surface is a convex surface, and the image side surface is a concave surface; a second lens having focal power, wherein the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a convex surface; a third lens having positive focal power, wherein the image side surface of the third lens is a convex surface; a diaphragm; a fourth lens having positive focal power, whereinthe object side surface of the fourth lens is a concave surface, and the image side surface of the fourth lens is a convex surface; a fifth lens having positive focal power, whereinthe object side surface of the fifth lens is a convex surface or a plane, and the image side surface of the fifth lens is a convex surface; a sixth lens having negative focal power, wherein the object side surface of the sixth lens is a concave surface; and a seventh lens having positive focal power, whereinthe object side surface of the seventh lens is a convex surface, and the image side surface of the seventh lens is a concave surface, wherein the fifth lens and the sixth lens form a bonding body. The wide-angle lens at least comprises an aspheric lens. The wide-angle lens has the advantages of large aperture, high pixel and good thermal stability.
Owner:合肥联创光学有限公司

Fisheye lens

The invention discloses a fisheye lens which comprises seven lenses in total, and the fisheye lens sequentially comprises first to third lenses, a diaphragm and fourth to seventh lens from an object side to an imaging surface along the optical axis; the first lens has negative focal power, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a convex surface; the second lens has negative focal power, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; the third lens has positive focal power, the object side surface of the third lens near the optical axis is a convex surface, and the image side surface of the third lens is a convex surface ; the object side surface and the image side surface of the fourth lens with positive focal power are convex surfaces; the fifth lens has positive focal power, and the object side surface and the image side surface of the fifth lens are convex surfaces; the sixth lens has negative focal power, and the object side surface and the image side surface of the sixth lens are concave surfaces; and the object side surface and the image side surface of the seventh lens with positive focal power are convex surfaces. The fisheye lens at least comprises a lens made of a glass material and a lens made of a plastic material. The fisheye lens has the advantages of high thermal stability, miniaturization, light weight, large aperture, ultra-large wide angle and the like.
Owner:JIANGXI LIANCHUANG ELECTRONICS CO LTD

Light detector in medical equipment, detection method and device of light detector and computer readable storage medium

An embodiment of the invention provides a light detector in medical equipment, a detection method and device of the light detector and a computer readable storage medium, and relates to the technicalfield of medical treatment. Whether a light detection chip is damaged or not can be determined according to the attenuation effect of the light detection chip, and the damaged light detection chip canbe correspondingly processed, so that the imaging quality of the medical equipment is improved. The light detector comprises at least one light detection module, and each light detection module comprises at least one light detection chip. The specific detection method of the light detector includes the steps: acquiring light sensing response data of all the light detection chips within specifiedtime before and after stop of light source irradiation; judging whether attenuation index parameters of the light detection chips meet preset requirements or not according to the light sensing response data; determining that the light detection chip is damaged when judging that the attenuation index parameters of one optional light detection chip do not meet the preset requirements. The detectionmethod is applicable to the detection process of the medical equipment based on light detector imaging.
Owner:SHANGHAI UNITED IMAGING HEALTHCARE

Wide-angle lens and imaging device

ActiveCN113985586AAchieve a large wide-angle effectLarge imaging surfaceOptical elementsOphthalmologyOptical axis
The invention discloses a wide-angle lens and an imaging device, and the wide-angle lens sequentially comprises a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens, a sixth lens and a seventh lens from an object side to an imaging surface along an optical axis. The first lens has negative focal power, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface; the second lens has negative focal power, the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a convex surface; the third lens has positive focal power, the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a concave surface; the wide-angle lens further comprises the diaphragm; the fourth lens has positive focal power, the object side surface of the fourth lens is a concave surface, and the image side surface of the fourth lens is a convex surface; the fifth lens has positive focal power, and the object side surface and the image side surface of the fifth lens are convex surfaces; the sixth lens has negative focal power, the object side surface of the sixth lens is a concave surface, and the image side surface of the sixth lens is a convex surface; and the seventh lens has positive focal power, the object side surface of the seventh lens near the optical axis is a convex surface, the image side surface of the seventh lens near the optical axis is a concave surface, and the object side surface and the image side surface of the seventh lens have inflection points. The wide-angle lens has the advantages of large wide angle and large image plane.
Owner:JIANGXI LIANCHUANG ELECTRONICS CO LTD

Optical imaging lens and imaging equipment

The invention discloses an optical imaging lens and imaging equipment, and the optical imaging lens sequentially comprises a first lens with negative focal power, wherein the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface; a second lens having negative focal power, whereinthe object side surface of the second lens is a concave surface, and the image side surface of the second lens is a convex surface; a diaphragm; a third lens having positive focal power, wherein the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a convex surface; a fourth lens having positive focal power, wherein the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a convex surface; a fifth lens having negative focal power,wherein the object side surface of the fifth lens is a concave surface, and the image side surface of the fifth lens is a concave surface; a sixth lens having positive focal power, wherein the object side surface of the sixth lens is a convex surface, and the image side surface of the sixth lens is a convex surface; and a seventh lens having negative focal power, wherein the object side surface of the seventh lens is a convex surface at a paraxial region and has an inflection point, and the image side surface of the seventh lens is a concave surface at a paraxial region and has an inflection point. The optical imaging lens has the advantages of ultra-large aperture, long focus and telephoto, high pixel, miniaturization, good thermal stability and the like.
Owner:JIANGXI LIANYI OPTICS CO LTD

High-field whole-body magnetic resonance imaging active shielding superconducting magnet and design method

The invention relates to a high-field whole-body magnetic resonance imaging active shielding superconducting magnet and a design method. The magnet comprises a main coil, an adjusting coil and a shielding coil, the main coil is a long solenoid coil, and the coil structure is preset, that is, the number of turns of a wire, the specification of the wire, the size of the coil and the position of the coil are known; and corresponding wire turns, wire specifications, coil sizes, coil positions and whole magnet operation current of the adjusting coil and the shielding coil are information to be solved, magnetic fields of the main coil, the adjusting coil and the shielding coil are superposed, the uniformity of the magnetic field generated in the center area of the magnet reaches a specified constraint condition, and meanwhile, the 5 Gaussian line range does not exceed the specified constraint range. The inner diameter of a magnet coil is not less than 800mm, the magnetic field intensity of a central area of the magnet is not less than 14T, the magnetic field uniformity peak-to-peak value in a spherical area with the diameter of 400mm does not exceed 10ppm, and the axial direction of a 5-gauss line range does not exceed + / -10m and the radial direction does not exceed + / -8m.
Owner:INST OF ELECTRICAL ENG CHINESE ACAD OF SCI

Single cigarette empty head detection method based on machine vision and special equipment

The invention discloses a single cigarette empty head detection method based on machine vision. The method comprises the following steps: (1) acquiring and processing a cigarette image by an endoscope, thus acquiring a preprocessed image P1; (2) extracting and processing a blue channel image P4 of the image P1; (3) preliminarily determining the position of the center of a circle of a cigarette in the image; (4) preliminarily determining the position of the cigarette to be detected in the image, and fitting the circle center coordinates and the radius in an area in which the cigarette is positioned; (5) judging the cigarette area is a filter tip or a cigarette head; (6) determining a boundary point between cut tobacco and cigarette paper of the cigarette; and (7) calculating the distance between the inner and outer boundary points, wherein if the distance is less than a certain threshold value, the cigarette is considered to be qualified, otherwise, the cigarette is an empty head cigarette and is removed. The invention also discloses special equipment for the detection method. According to the method, the cigarette image is acquired by the endoscope, and due to accurate computer processing, the single cigarette empty head can be accurately and rapidly detected.
Owner:NANJING WENCAI SCI & TECH

Nonlinear Structured Illumination Microscopic Imaging Method and System

The invention discloses a non-linear structure light illumination microscopic imaging method which comprises the following steps: 1) loading a computed hologram on a digital microscopic array; 2) generating a first spatial structure light field which meets sine distribution and is used for activating fluorescent protein, and radiating the first spatial structure light field to the surface of a sample, so as to convert a part of protein to be in an illuminated state from a dark state; 3) radiating the sample in a second spatial structure light field so as to enable fluorescent protein in the bright state to emit fluorescent light, collecting the fluorescent light, and imaging in a photoelectric detector; 4) repeating the step 2) and the step 3), acquiring a plurality of spatial frequencies, acquiring a plurality of initial phases in each direction to obtain a plurality of original images, and reestablishing a super-resolution image according to a GPU acceleration algorithm. The invention further discloses a non-linear structure light illumination microscopic imaging system. The non-linear structure light illumination microscopic imaging method has the advantages of relatively high system imaging resolution, high fluorescent drifting resistance, low phototoxicity and rapid imaging.
Owner:SUZHOU INST OF BIOMEDICAL ENG & TECH CHINESE ACADEMY OF SCI
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