86results about How to "Meet imaging requirements" patented technology

A method and system for widening the dynamic range of optical coherent tomography (OCT) is disclosed. Said method includes such steps as using a spectroscopic plate with high spectroscopic ratio at the detecting arm for splitting the coherent spectral signal, acquiring the spectral signals by the plane-array CCD detector respectively, one-dimension Fourier transform to obtain two OCT images with different exposures, and digital synthesis to obtain one OCT image with widened dynamic range.

A large-view-field catadioptric fundus camera optic system belongs to the field of medical optical instruments and aims at resolving technical problems in the prior art that a total refraction system is stray in light, and a total catadioptric system is small in imaging view field, complex in structure, free of diopter compensation, difficult in manufacturing off-axial retina objective lenses and the like. The large-view-field catadioptric fundus camera optic system comprises two parts including an imaging light path and an illumination light path, wherein the imaging light path and the illumination light path share a reflection type retina objective lens primary lens, a reflection type retina objective lens secondary lens and a hollow reflection lens. The large-view-field catadioptric fundus camera optic system further comprises a refraction type illumination relay lens group, an illumination diaphragm, a refraction illumination collecting lens group, a light source, a refraction focusing lens group, a refraction type focus imaging lens group and a camera, wherein the refraction type imaging lens group adopts a free-form surface to rectify residual off-axial aberration of a reflection type retina objective lens. Therefore, a fundus imaging system is guaranteed to meet imaging requirements in the area of 45-degree view field, and performance of the refraction fundus camera optical system is improved.

The invention is suitable for the technical field of optical three-dimensional digital imaging and provides a fringe projection profilometry-based efficient phase position-three-dimensional mapping method. The fringe projection profilometry is on the basis of a binocular system, and the binocular system comprises a projection device and an imaging device. The method comprises the following steps: S1, protecting fringe sequence to the surface of a to-be-detected object by the projection device, acquiring a deformed fringe graph modulated by the to-be-detected object by the imaging device, and calculating according to the deformed fringe graph to obtain the phase positions of all the pixel points on the image of the imaging device; and S2, finding out a phase position-three-dimensional mapping coefficient corresponding to each pixel point from a preset phase position-three-dimensional mapping coefficient lookup table and substituting the phase position of each pixel point and the corresponding phase position-three-dimensional mapping coefficient into a phase position-three-dimensional mapping function so as to calculate the three-dimensional coordinates of an object point corresponding to each pixel point on the image of the imaging device. By the method provided by the invention, efficient three-dimensional reconstruction of fringe projection profilometry can be realized.

The invention provides a low current signal amplifier including a pixel converting unit, a pixel read-out sequence control unit, a read-out stage unit, an analog multiplex selector, an output buffer stage unit, a digital time sequence control unit, where an integral reset control signal and said electrical reset control signal are output to the digital time sequence control circuit unit and the pixel read-out sequence control circuit unit respectively; furthermore, the low current signal amplifier includes a clock delay unit, where the master clock signal thereof is output to the pixel read-out sequence control unit and the digital time sequence control unit. According to the invention, a clock delay unit is added to the low current signal amplifier, which avoids the situation of large gate circuits reversed simultaneously, reduces switching noise, and decreases noise effect influenced on the low current signal amplifier.

The invention discloses a deep tissue X-ray excitation multispectral tomography system and method. The system comprises an X-ray source, an X-ray flat panel detector, an EMCCD camera, an electric control rotary table, a narrow-band filter, a lead plate, a computer and an animal to be imaged; nano-luminescence materials are excited through an X ray, short-wave infrared light with the specific spectra sections, particularly high penetration depth is emitted, photons penetrate through tissue to reach the surface of an imaged object, the light of different wave length spectra sections is received by an EMCCD camera by being filtered by the narrow-band filter, and an obtained image and a rebuilt result under each spectra section are obtained; multivariate analysis is adopted for carrying out treatment and analysis on multispectral images and rebuilt results, accurate distribution of the nano-luminescence materials in the object is obtained and combined with CT tomography results, and finally a deep tissue multispectral tomography image is obtained. The imaging depth of X-ray excitation multispectral tomography can be effectively improved, and deep tissue imaging of small living animals is achieved.

The invention provides a target simulating system of a dynamic selenographic imaging sensor. The target simulating system comprises a target image generating unit, an image outputting unit and an optical transmission unit; the target image generating unit is used for generating a three-dimensional selenographic feature according to DEM (Dynamic Effect Model) data and remote sensing image data, and dynamically generating grayscale image data meeting the imaging requirement of the selenographic imaging sensor according to a selenographic illumination condition of the selenographic imaging sensor at imaging time and a position posture parameter of the selenographic imaging sensor at the time; the image outputting unit is used for displaying the grayscale image data generated by the target image generating unit on an LCD (Liquid Crystal Display) device; and the optical transmission unit is used for optically converting an image displayed on the LCD device, so that the image is rightly imaged on an imaging device of the selenographic imaging sensor.

The present invention provides a super star-light-level high-resolution fixed focus lens which comprises a first lens with convex-concave negative focal power, a second lens with biconcave negative focal power, a third lens with concave-convex positive focal power, a fourth lens with biconvex positive focal power, a fifth lens with convex-concave positive focal power, a sixth lens with convex-concave negative focal power, a seventh lens with biconcave negative focal power, an eighth lens with biconvex positive focal power, a ninth lens with biconvex positive focal power, a tenth lens with convex-concave negative focal power and an eleventh lens with biconvex positive focal power which are orderly arranged from an object side to an image side along an optical axis. 11 specially arranged lenses are adopted, the super star-light-level high-resolution fixed focus lens has a characteristic of ultra large amount of light pass, a wide angle 110 degrees of the field of view angle is supported,and at the same time, the requirements of resolution and imaging can be ensured when the lens is used in an environment of -40 DEG C to 70 DEG C.

Beam splitter is setup on laser output path from krypton fluoride laser in picosecond. Incident beam is divided by the splitter into reflection beam A and transmission beam B. reflection path includes optical delay line composed of three pieces of reflectors, concave reflection lens and sample. With being delayed by optical delay line and being focused by concave reflection lens, beam A interact with the sample. Being reflected by reflector, beam B entering into photocathode X-rays diode hits photocathode so as to generate photoelectrons. Photoelectrons accelerated by anode voltage generate X ray, which is focused and dispersed by concave reflection grating to hit sample. The invention explores plasma process generated by beam A. the said plasma process is imaged, received by detector and displayed on computer.

The present invention provides a wide-angle high-definition machine vision lens. The lens comprises a focusing set and a fixing set; the focusing set comprises a first lens having positive focal power, a second lens having negative focal power and a third lens having negative focal power which are arrange in order from an object side to an image side along an optical axis; and the fixing set comprises a fourth lens having a positive focal power, a fifth lens having positive focal power, a sixth lens having negative focal power, a seventh lens having positive focal power, an eighth having positive focal power and a ninth lens having negative focal power which are arranged in order from the object side to the image side along the optical axis. Through adoption of the mode of grouping focusing, the lens ensures good imaging quality effect under object distance from 0.1mm to infinite distance, the distortion is less than 1%, and the relative illumination of the optical system marginal ray is more than 70%; the supporting field angle is larger than 70 degrees; and the wide-angle high-definition machine vision lens can ensure that resolution satisfies imaging requirements when usage in the environment of -40-70 DEG C.

The invention provides a large-field-angle machine vision lens. The large-field-angle machine vision lens comprises a fixed lens group and a focusing lens group which are arranged along an optical axis, when a working distance is changed, the focusing lens group moves for focusing in the front-back direction relative to the fixed lens group, and therefore, an optimal imaging surface is found out.The large-field-angle machine vision lens is characterized in that the fixed lens group is arranged on one side of an object space of the focusing lens group, the fixed lens group, the focusing lens group and the whole lens meet the following conditional expression: 0.9</=|ft/f|</=1.6, |fg/f|>/=10, wherein ft is a focal length of the focusing lens group, fg is a focal length of the fixed lens group, and f is a focal length of the whole lens. The lens has the characteristics of high resolution, large target surface, large field angle, low distortion and the like.

The invention provides a fast neutron imaging system. The fast neutron imaging system comprises a neutron conversion screen, a mirror, an image detector, an optical adjustment frame, a camera obscura,a shielding module and a computer control system, wherein the neutron conversion screen, the mirror, the image detection and the optical adjustment frame are arranged in the camera obscura, and the shielding module is arranged at one side, facing a neutron beam, of the camera obscura; the neutron conversion screen comprises a neutron-proton conversion layer, a proton energy selection layer, an electron multiplication layer and a fluorescent layer; the image detector adopts a silicon photomultiplier tube array or an image enhancement CCD camera; the optical adjustment frame comprises a first translation stage and a second translation stage; one end of the first translation stage is provided with the mirror, the other end of the first translation stage is connected with a second translationstage, and the second translation stage is provided with the image detector opposite to the mirror; the computer control system remotely controls the movement of the first translation stage and second translation stage. The fast neutron imaging system has the advantages that the structure is simple and compact, and the imaging requirements of different views fields and resolutions can be met.

The invention belongs to the field of medical imaging contrast agents, and provides a pegylated polyethyleneimine macromolecular magnetic resonance imaging contrast agent and a preparation method of the contrast agent. The preparation method comprises the following steps: first, modifying a gadolinium ion chelating agent DTPA (Diethylenetriamine Pentaacetic Acid) on the surface of PEI (Polyethyleneimine) to prepare PEI-DPTA; second, modifying a composite material by pegylation to prepare PEI-DTPA-mPEG; and finally, chelating gadolinium ions to prepare PEI-DTPA (Gd III)-mPEG, and acetylating residual amino groups on the surface of PEI. The pegylated polyethyleneimine macromolecular magnetic resonance imaging contrast agent obtained by the invention realizes in vivo MR (Magnetic Resonance) blood vessel and kidney imaging of a mouse as well as passive targeted MR imaging detection of tumor tissues. The contrast agent is wide in application prospect.

The invention provides an ultrasonic transducer and ultrasonic energy transducing equipment. An ultrasonic transducer array module is supported by a backing block, an electric connection structure cansimultaneously transmit working power to a plurality of ultrasonic transducer array modules to ensure the supply of the working power, a conversion driving device is arranged on the backing block toprovide folding or unfolding of the backing block in the width direction of the backing block, a plurality of ultrasonic transducer array modules are arranged in the length direction in the folding process, the folding direction of adjacent ultrasonic transducer array modules in the deformation process changes directions alternately, and the elongated structure is deformed into a matrix structurearranged in parallel to meet the imaging requirement. Through the shape transformation of the ultrasonic transducer array module, the ultrasonic transducer array module can be transported in a long strip shape to meet the transportation requirements of small apertures; the long strip shape only has imaging capability, meets imaging requirements after matrix deformation, ensures imaging capabilityof the ultrasonic transducer, and also has HIFU treatment capability.

The invention belongs to the field of safety early warning of driving operation, and provides an infrared imaging human body identification safety early warning technology of driving operation, for the purposes of performing safety early warning in advance on pedestrians close to an driving machinery guard area, eliminating the possibility that personnel approaches a dangerous area and putting an end to personnel casualty accidents caused by driving operation. The technical scheme employed by the invention is as follows: the infrared imaging human body identification safety early warning apparatus of the driving operation comprises an infrared thermal imaging core used for performing thermal imaging on the pedestrians approaching the driving machinery guard area; an infrared image processing subsystem used for processing infrared sequence images acquired by the infrared thermal imaging core in real time and detecting and identifying the approaching pedestrians; and a single-chip microcomputer control module used for receiving a downlink instruction from the infrared image processing subsystem, and according to the downlink instruction, controlling an acousto-optic alarm apparatus to send emergency shutdown signals to driving machinery. The infrared imaging human body identification safety early warning apparatus of the driving operation is mainly applied to a large-scale machinery equipment safety monitoring occasion.

The invention relates to an infrared chromatography method for fixed optical fiber image transmission in free space, which is characterized in that infrared radiation exists in all directions of the external space of an object to be tested, fixed points in space are provided with optical fibers for transmitting light, and the optical fibers for transmitting light in multiple points are grouped, each group is formed into optical fiber beams in sequence so as to transmit the data of an objective multi-ray emission spectrum and complete the testing of objective three-dimensional physical parameters through a chromatographic inversion reconstruction algorithm of parallel beams and a mathematic-physical equation of radiation. The invention has the advantages that the object to be tested can enter the space with the optical fibers along straight radiating light rays to satisfy the imaging requirements of the chromatography of the parallel beams, and ideal data are provided for infrared emission spectrum chromatography so as to increase the accuracy of chromatography reconstruction.

The present invention relates to an area array CCD camera shutter, which comprises a fast disc, a slow disc, code discs, a first motor, a second motor and a control circuit. The fast disc and the slow disc are respectively arranged at one end of the rotating shaft of the first motor and at one end of the rotating shaft of the second motor; code discs are respectively arranged at the other ends of the rotating shafts of the first motor and the second motor are respectively; the fast disc and the slow disc rotate at different speeds; the code discs measure the rotating speeds and phases of the fast disc and the slow disc, and transmit the rotating speeds and phases to the control circuit; the control circuit controls the first motor and the second motor to rotate at the constant rotating speeds according to the signals of the rotating speeds and the phases; sector openings with different sizes are respectively arranged on the fast disc and the slow disc; when the sector openings of the fast disc and the slow disc simultaneously pass through the light path, the CCD is exposed; and when the sector openings of the fast disc and the slow disc do not simultaneously pass through the light path, the CCD can not be exposed, and the charges in the CCD can be eliminated and read.

The invention provides a high-definition and large-image-surface super starlight prime lens. The high-definition and large-image-surface super starlight prime lens comprises a convex-concave negative-focal-power first lens, a concave-convex negative-focal-power second lens, a positive-focal-power third lens, a biconvex positive-focal-power fourth lens, a biconvex positive-focal-power fifth lens, abiconcave negative-focal-power sixth lens, a biconvex positive-focal-power seventh lens, a concave-convex negative-focal-power eighth lens, a biconvex positive-focal-power ninth lens and a convex-concave positive-focal-power tenth lens which are sequentially arranged from the object space and the image space along an optical axis. The high-definition and large-image-surface super starlight primelens has the advantages that the 10 specially arranged lenses are used, lens parameters are creatively designed, and the prime lens is super-large in light transmission quantity and cable of especially satisfying the monitoring requirements under complex conditions; in addition, under the premise that the F1.0 large light transmission quantity is kept, imaging quality is increased, and the prime lens supports wide field angle of 110 degrees; meanwhile, resolving power can be guaranteed when the prime lens is used in an environment of 40-70 DEG C, and imaging requirements can be satisfied.

The invention provides a hyperspectral rapid imaging system for a molecular vibration mode. The hyperspectral rapid imaging system comprises an optical comb light source, a wide-field coherent Raman scattering microscopic light path and a high-speed area array photoelectric detector, wherein the optical comb light source is used for generating pump light, Stokes light and detection light in a wide-field coherent Raman scattering process; the wide-field coherent Raman scattering microscopic light path is used for forming light generated by means of the optical comb light source into a large-light-spot light beam to irradiate a sample, so that the sample generates an anti-Stokes light signal under the action of a coherent Raman scattering effect; and the high-speed area array photoelectric detector is used for collecting the anti-Stokes optical signal emitted from the sample and carrying out rapid hyperspectral imaging. By adopting the hyperspectral rapid imaging system, spectral measurement and imaging can be carried out at the same time, the imaging speed is greatly accelerated, and the imaging requirement of a living biological sample is met.

The invention discloses a large-relative-aperture underwater zoom imaging lens, which comprises a water-proof window, a zoom lens set composed of eleven lenses, and an imaging CCD. The zoom lens set sequentially comprises a front fixing group, a zoom group and a rear fixing group from the object side to the image side. The front fixing group comprises a first lens and a second lens. The zoom groupcomprises a third lens, a fourth lens, a diaphragm and a fifth lens. The rear fixing group comprises a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens and an eleventh lens. Thefirst lens is a non-spherical double-glued lens for correcting the chromatic aberration. The second lens is an aspherical lens with positive focal power. The third lens, the ninth and the tenth lenses are lenses with negative focal power. The fourth lens, the fifth lens and the sixth lens are double-glued lens for correcting the chromatic aberration. The seventh lens, the eighth lens and the eleventh lens are lenses with positive focal power. The lens disclosed by the invention has a large relative aperture. The lens is ensured to be high in illumination degree under a large visual field, sothat the imaging requirement can be met.

The embodiment of the invention discloses a prime lens, which comprises a first lens with negative focal power, a second lens with negative focal power, a third lens with positive focal power or negative focal power, a diaphragm, a fourth lens with positive focal power, a fifth lens with positive focal power, a sixth lens with negative focal power and a seventh lens with positive focal power whichare sequentially arranged along an optical axis from an object side to an image side, wherein the first lens and the third lens are spherical lenses, and the second lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens are aspheric lenses. According to the technical scheme of the embodiment of the invention, the 4K wide-angle optical lens with a large target surface and an ultra-large aperture can be realized, the lens supports the maximum target surface of 1/1.8 inches under the condition of relatively low cost, the aperture number meets the condition that F is more than0.8 and less than 1.2, the field angle is greater than 120 degrees, and the imaging requirement is met when the lens is used in an environment of -30 DEG C to 80 DEG C.