143results about How to "High imaging performance" patented technology

A new way of mixing instrumental and digital means is described for the general field of wave front sensing. The present invention describes the use, the definition and the utility of digital operators, called digital wave front operators (DWFO) or digital lenses (DL), specifically designed for the digital processing of wave fronts defined in amplitude and phase. DWFO are of particular interest for correcting undesired wave front deformations induced by instrumental defects or experimental errors. DWFO may be defined using a mathematical model, e.g. a polynomial function, which involves coefficients. The present invention describes automated and semi-automated procedures for calibrating or adjusting the values of these coefficients. These procedures are based on the fitting of mathematical models on reference data extracted from specific regions of a wave front called reference areas, which are characterized by the fact that specimen contributions are a priori known in reference areas. For example, reference areas can be defined in regions where flat surfaces of a specimen produce a constant phase function. The present invention describes also how DWFO can be defined by extracting reference data along one-dimensional (1D) profiles. DWFO can also be defined in order to obtain a flattened representation of non-flat area of a specimen. Several DWFO or DL can be combined, possibly in addition with procedures for calculating numerically the propagation of wave fronts. A DWFO may also be defined experimentally, e.g. by calibration procedures using reference specimens. A method for generating a DWFO by filtering in the Fourier plane is also described. All wave front sensing techniques may benefit from the present invention. The case of a wave front sensor based on digital holography, e.g. a digital holographic microscope (DHM), is described in more details. The use of DWFO improves the performance, in particular speed and precision, and the ease of use of instruments for wave front sensing. The use of DWFO results in instrumental simplifications, costs reductions, and enlarged the field of applications. The present invention defines a new technique for imaging and metrology with a large field of applications in material and life sciences, for research and industrial applications.

The invention discloses a method for optimizing SAR (Specific Absorption Rate) extended scene imaging on a double-base forward-looking high-mobility platform. The method comprises the following main steps: obtaining an SAR time domain echo signal of a point target at first so as to obtain an echo signal and a range history after the linear moving amount is corrected, and then, carrying out azimuth FFT (Fast Fourier Transform) of the echo signal after the linear moving amount is corrected so as to obtain a two-dimensional frequency spectrum of the time domain echo signal; and carrying out high-order approximation of the range history after the linear moving amount is corrected, carrying out Taylor series development in the range direction after obtaining the phase term of the high-precision two-dimensional frequency spectrum after the linear moving amount is corrected, eliminating the phase space-variant property of the phase term of the high-precision two-dimensional frequency spectrum by adopting high-order polynomial fitting, carrying out range domain IFFT (Inverse Fast Fourier Transform) after obtaining a phase compensation signal having good focus in the range domain through a matching filter designed through the two-dimensional frequency domain, and then, obtaining focused SAR imaging through the matching filter designed in a range-Doppler domain.

The invention discloses an array typed laser scanner comprising a base, a control driving system and a plurality of auxiliary mirrors arranged in array. The auxiliary mirrors are arranged on the same direction and are fixed on the base; gaps are reserved between two adjacent auxiliary mirrors, so that the auxiliary mirrors do not touch each other when inclining to each other; the control driving system is connected with piezoelectric drivers in Ns of the auxiliary mirrors to realize open loop control of deflecting angles of reflectors. A multiple light ray scanning method is utilized to connect a plurality of small scanning fields into a big scanning field, and is capable of ensuring scanning angles and scanning frequency at the same time, each auxiliary is capable of scanning independently and multiple task detection is realized. With the array typed laser scanner, space utilization rate is greatly increased, and scanning angles are improved; the array typed laser scanner is characterized in that the array typed laser scanner is fast in driving speed, high in control accuracy, no mechanical abrasion, compact in structure, high in space utilization rate and good in stability, small in volume, light in weight, high in rigidity and is especially suitable for application of satellite and unmanned machine imaging laser radar.

The invention belongs to the technical field of microwave remote sensing and detection, relating to an imaging correction method for a synthetic aperture radiometer, wherein, the method first measures the visibility output of every baseline of a background and a channel background and then an external source (a signal source or a noise source) is placed within the field of view to measure the visibility output of every baseline; the twice measured visibility outputs are subtracted by the baseline to obtain the visibility output caused by the external source; the visibility output of the measured field is measured to obtain a corrected invisibility by subtracting a related output phase caused by the external source from the obtained output phase, and then obtain an image by inversion so as to obtain a corrected image of the measured field. The correction method can improve the imaging performance of the interference synthetic aperture radiometer and has the advantages of simple measurement, no need for support from a turntable control system, less calculating amounts and period measurement. The correction method is not confined into distance field measurement and can also be used under near field condition found by emulation and experiment.

The invention discloses a computational lithography method for a model-driven convolution neural network (MCNN), and the method can improve the computation speed and convergence performance of OPC (optical proximity correction) method. The technical scheme includes: expanding and truncating the gradient iterative algorithm, and constructing a model-driven convolution neural network (MCNN); based on an imaging model of a lithography system, constructing a decoder corresponding to the MCNN; bringing the MCNN and the decoder to end-to-end connection, and subjecting the MCNN to the following training: optimizing the parameters of the MCNN by back propagation algorithm to minimize the error between the input data of MCNN and the decoder; separating the decoder from the MCNN at the end of the training; inputting a to-be-optimized circuit layout into the trained MCNN so as to obtain an estimated result of an OPC mask; taking the estimated result of OPC mask as the initial value, and carryingout iterative updating on the set number of times of the mask by gradient iterative algorithm, thus obtaining the final OPC mask optimization result.

The invention provides a method for strengthening total internal reflection fluorescence microscopic imaging by means of surface plasma of high-level secondary axial symmetry polarized beams. The method comprises the steps that spatial filtering is carried out on laser beams emitted by a laser through a pinhole filter, and the laser beams are straightened into parallel beams through a collimating lens; the parallel beams are incident into a polarization transition system to converted in the aspect of a polarization state; amplitude and phase modulation is further carried out on the obtained secondary axial symmetry polarized beams through a pupil filter and an annular diaphragm; the modulated secondary axial symmetry polarized beams are further reflected into a focusing objective lens with a high numerical aperture through a dichroic beam splitter and are incident to a three-layer structure of 'a glass substrate-a metal membrane-a sample'; excited fluorescence signals are reflected into the focusing objective lens through the three-layer structure, beam-expansion is carried out on the fluorescence signals by the focusing objective lens, the fluorescence signals are transmitted by the dichroic beam splitter, the fluorescence signals are focused onto a pinhole array plate through the focusing lens after filtered by a filtering plate, and light signals are converted into electric signals through a detector to be further processed.

The present invention relates to a method and apparatus providing tissue harmonic imaging using an ultrasound machine. Coded pulses and the phase inverted version of the said coded pulses with time bandwidth greater than 1 are transmitted into the tissue. Backscattered echoes are received and filtered before or after coherent summation. Decoding/compressing of the received echoes of the coded pulses is implemented naturally through the propagation of the specially designed ultrawide band (>80%) waveforms inside tissue and pulse inversion. Costly decoding/compression filter are not necessary.

The invention discloses an image sensor, a high dynamic range image processing system and method, electronic equipment and a computer readable storage medium. The high dynamic range image processing system comprises an image sensor, a color high dynamic fusion unit and an image processor. When the pixel array in the image sensor is exposed, at least one single-color photosensitive pixel in the same subunit is exposed at a first exposure time; wherein the at least one single-color photosensitive pixel is exposed at a second exposure time less than the first exposure time, the at least one full-color photosensitive pixel is exposed at a third exposure time less than or equal to the first exposure time, and the at least one full-color photosensitive pixel is exposed at a fourth exposure timeless than the first exposure time. And the color high-dynamic fusion unit and the image processor are used for performing high-dynamic range processing, image processing and fusion algorithm processing on the first color original image, the second color original image and the panchromatic original image to obtain a target image.

The invention discloses an optical module and a head-mounted display device, the optical module comprises a display, a cemented lens, a light splitting member, a quarter-wave plate and a polarization reflection film, wherein the display emits light for imaging display; the cemented lens is arranged in the light emitting direction of the display and comprises a first lens and a second lens, the first lens and the second lens are sequentially arranged in the propagation direction of a light path, the second surface of the first lens and the third surface of the second lens are arranged in a cemented mode, and the third surface protrudes towards the direction of the display. The fourth surface of the second lens protrudes towards the direction away from the display; the light splitting member is arranged on the first surface of the first lens; the quarter-wave plate is arranged between the first lens and the second lens; the polarization reflection film is arranged between the quarter-wave plate and the second lens. According to the technical scheme, the total optical length of the optical system can be reduced, the size of the head-mounted display device is reduced, and a user can wear the head-mounted display device conveniently.

Provided is an optical system having at least two or more lenses, wherein at least one of the lenses comprises an anti-reflection film formed by a wetting method on a part of or the entirety of the light beam effective surface thereof, and wherein at least one of the lenses other than the lens comprising the anti-reflection film is fixed to the space between the lens and a barrel for holding the lens via an energy-curable resin to be filled therein.

The invention provides a camera module set. The camera module set includes an image sensor chip, a mounting frame and a circuit board substrate; an inner layer supporting structure is additionally arranged on a peripheral bonding structure formed by the mounting frame and the circuit board substrate; the inner layer supporting structure contacts with the periphery of a photosensitive region of the image sensor chip; and therefore, the camera module set can be firmer. The inner layer supporting structure can prevent light from directly entering pads and/or bond lines, or the inner layer supporting structure and the photosensitive surface of the image sensor chip can form a cavity with a step, and therefore, light can be reflected repeatedly, and stray light can be reduced or eliminated, and thus, the imaging performance of the camera module set can be improved.

The invention discloses a compressed sensing LASAR sparse linear array optimization method based on low coherence. The method is characterized in that coherence characteristic of a measurement matrix in the compressed sensing theory is utilized as a reference basis for compressed sensing LASAR sparse linear array optimization; and on the basis of minimum of coherence of the compressed sensing measurement matrix in a LASAR system, and by means of a Fourier transform iterative search method, compressed sensing LASAR sparse linear array antenna array element distribution optimization design is realized, more reasonable sparse linear array optimization is realized, and imaging performance of the compressed sensing LASAR system is improved favorably. The method provided in the invention is also suitable for other sparse linear array antenna optimization technical fields based on compressed sensing.

The invention discloses a shortwave infrared telescope lens which is formed by the configuration of a first lens group with positive focal power, a second lens group with negative focal power and a third lens group with positive focal power from an object side orderly. The second lens group is formed by single lens elements. In the time of focusing, the second lens group moves along an optical axis, and the first lens group and the third lens group are fixed relative to an imaging surface. The invention provides the shortwave infrared telescope lens with a small size, light weight, large diameter, high resolution, excellent imaging performance and an inner focusing mode.

The invention provides a wide-view-field high-resolution camera shooting device and method based on calculation aberration compensation. The wide-view-field high-resolution camera equipment based on calculation aberration compensation comprises an optical input module, a scanning micro-lens array module and an imaging module, wherein the optical input module comprises an optical lens; the scanningmicro-lens array module comprises a displacement device and a micro-lens array; the imaging module comprises an image sensor; the optical input module shoots a scene through any optical lens to collect optical information; and the scanning micro-lens array module drives the micro-lens array to perform periodic movement scanning through the displacement device, and further transmits the optical information collected by the optical lens to the image sensor in the imaging module.

The invention discloses a dual-probe scanning ionic conductive microscope system based on a balance bridge and an imaging method thereof. The dual-probe scanning ionic conductive microscope system based on the balance bridge comprises a dual-probe scanning configuration unit, a core control unit and an upper computer operation unit; the dual-probe scanning configuration unit comprises a bridge configuration module and a scanning platform; a core control unit comprises a signal collection module, a piezoelectric ceramics control module, a micro machine control module and a signal output module; and the upper computer operation unit comprises an upper computer operation interface and a serial port communication module between the upper computer and a FPGA chip. The dual-probe scanning ionic conductive microscope system based on the balance bridge can better overcome the ion current drift, and improves the quality and stability of the scanning image. The invention can perform scanning imaging on the surface three-dimension appearance of a biologic sample under a biological environment, and can realize the non-contact, nanometer grade resolution and stable scanning.

The invention discloses a compression ultrafast imaging type arbitrary reflecting surface speed interferometer, which is composed of a light source and target system, an etalon interference system, acompression ultrafast imaging system, a sequential control system and a data processing system. According to the invention, the compression ultrafast imaging system is adopted to replace an imaging device in a traditional imaging type arbitrary reflecting surface speed interferometer, a Compression Ultrafast Imaging (CUP) technology is introduced in an imaging process, multi-frame images, namely two-dimensional space and one-dimensional time three-dimensional imaging, can be reconstructed through CUP-VISAR two-dimensional ultrafast dynamic image imaging and single measurement, and the completedynamic process of a two-dimensional interference fringe image is restored, so that shock wave space-time evolution information is effectively obtained; and the imaging performance of an imaging typearbitrary reflecting surface speed interferometer is improved in dimension, and the target which cannot be achieved before is achieved.

The invention relates to a wide-angle large-light-ring prime lens. A lens group is arranged in the prime lens, and the lens group comprises a first lens with negative focal power, a second lens with negative focal power, a third lens with positive focal power, a fourth lens with negative focal power, a fifth lens with positive focal power, a sixth lens with positive focal power, a seventh lens with positive focal power, an eighth lens with negative focal power and a ninth lens with positive focal power sequentially arranged from an object side to an image side along the direction of an opticalaxis. According to the wide-angle large-light-ring prime lens, the defect that an existing wide-angle large-light-ring prime lens matched with a 1/1.8'' image surface chip is large in size (large intotal optical length) is overcome, nine lenses with optimal optical conditions are matched, the total optical length is small, and day and night confocal and high and low temperature drift compensation functions are achieve.

The invention provides a novel un-cooled infrared focal plane array imaging system, which comprises infrared imaging light paths 1 and 7, illumination light paths 2 and 8, a light splitting device 3, an optical readout light path 4, a reference light path 5 and an image acquisition and processing system 6. The 1 images the hot image of an external scene on an infrared focal plane array 7, so that the array image element of the 7 is changed; the parallel light emitted from the 2 is split into two beams by the 3, wherein one beam enters the 1, is modulated by the 7 carrying external infrared hot image signals and then enters the 4, and the other beam directly enters the 5; and the light emitted from the 4 and the 5 simultaneously enters the 6, and the light is processed to output an infrared hot image. The system has the core that the 5 is increased; and when the image is processed, the infrared hot image output by the 4 can be corrected in real time by using the output signals of the 5 so as to eliminate the influence of light source and power supply ripples, light source ageing and environmental temperature and illumination changes on the imaging precision and the sensitivity of the system and improve the working stability and reliability of the system.

The invention relates to a large view field staring type spectral imaging system and an imaging method thereof. A prepositioned object lens and a spectral imaging system of the large view field staring type spectral imaging system are in optical structures which mix refraction and reflection or diffraction and the prepositioned object lens combines gradation dividing and aperture dividing. The imaging method of the large view field staring type spectral imaging system comprises that the prepositioned object lens obtains a two-dimensional middle image with the uniform imaging performance from a huge view field; a multi-view-field, high performance and full-wave-band space image obtained through a multi-aperture sub-view-field and the further aberration fine correction is served as a target object of a follow-up spectral imaging system; aperture channels obtain images which are corresponding to spectrums inside the view field after dispersion light splitting and focus imaging which are performed through the spectral imaging system; images of spectrums in the full view field are obtained after fuse splicing. The large view field staring type spectral imaging system has the advantages of solving the problem that the time is inconsistent due to the fact that the spectral images are obtained through a traditional push and sweep mode and being large in view field, compact in structure, good in spectral imaging quality, strong in light concentrating capability, high in spectral resolution and applicable to aviation and spaceflight hyperspectral remote sensing imaging.

The invention provides a visible light-medium wave infrared dual-band common aperture optical system, which solves the problems that a conventional dual-band imaging system is large in overall size and heavy in weight. The system comprises a main reflector, a light splitting element, a visible light subsystem and a medium wave infrared subsystem, the target light is reflected to the light splitting element through the main reflector, and the light splitting element is used for splitting the light into two paths which respectively enter the visible light subsystem and the medium wave infrared subsystem. The visible light subsystem comprises a first folding axis reflector, a second folding axis reflector, a primary image correction lens group, a collimating lens group and an objective lens group which are sequentially arranged along a light path; and the medium wave infrared subsystem comprises a medium wave infrared correction lens group, a fourth folding axis reflector and a projectionlens group which are sequentially arranged along a light path. The visible light subsystem and the medium wave infrared subsystem are divided into two paths in a mode of sharing the light splitting of the primary reflector and the secondary reflector, the visible light subsystem and the medium wave infrared subsystem are independently and synchronously imaged respectively, and the dual-band lenshas high imaging quality and completely meets the requirements of a system for target detection and imaging.