75 results about "Multi focus" patented technology

Process and system for determining the topography of bioelectric response signals of a visual system including a patient's retina, optical nerve or a projection thereof at the level of the central cortex, following visual stimulation through a surface arranged in front of the patient's eye. An image which comprises a plurality of cells is displayed as stimulation, each cell being activated or deactivated according to a corresponding digital time function represented by a cyclical succession of binary m-sequences of duration (T) formed from a plurality of activation symbols (N), each having a duration (Ts), the m-sequences of the various cells being obtained cyclically from a mother m-sequence. The process determines the total bioelectric response of the visual system, the response associated with each cell being determined by the total response of the visual system using a cross-correlation with a suitable translated version of a mother m-sequence. The calculation of the response of each cell is updated at the end of each symbol time (Ts), thereby making it possible to follow the evolution of the calculated response of each cell in real-time, without awaiting the end of an m-sequence.

A multi-focal objective lens for use in an optical pickup apparatus for recording and/or reproducing information using a first light flux with a wavelength λ₁ on a first and second optical discs, includes a first optical surface including a first diffractive structure. The multi-focal objective lens converges a diffracted light flux with one of the m-th diffraction order and the n-th diffraction order on an information recording surface of the first optical disc for recording and/or reproducing information of the first optical disc, and converges a diffracted light flux with another of the m-th diffraction order and the n-th diffraction order on an information recording surface of the second optical disc for recording and/or reproducing information of the second optical disc.

The present invention provides a lens, a manufacturing method of the lens, and an optical display device. The lens comprises at least two lens regions. The at least two lens regions are different in focal length, so that a real world image is imaged at different preset depths of field when human eyes are looking at the real world image through the at least two lens regions. According to the technical scheme of the invention, the lens comprises different lens regions having different focal lengths, so that the lens is a multi-focal lens. Therefore, when the human eyes are looking at the real world image through the lens, the real world image is imaged at different preset depths of field. When the lens is applied to the imaging process of the optical display device or other virtual reality devices, virtual images seen by the human eyes are imaged at different distances when the human eyes are looking at the image displayed on a screen through different lens regions due to the fact that different lens regions are different in focal length. When the human eyes are looking at the virtual images of different distances for a long period of time, the visual fatigue is relieved. Meanwhile, scene images of different depths can be appreciated at the same time, and the three-dimensional feeling is improved.

The invention discloses an image fusion method and system based on a generative adversarial network, and a storage medium. The method comprises the steps that a sample set is used for pre-training a fuzzy region recognition model, and a mask image of a fuzzy region marked by each image sample in the sample set is output, wherein the sample set comprises the image samples and a fusion image label Ir; multi-channel images formed by stacking the image samples and the corresponding mask images are input into a fusion model to be trained, wherein the fusion model comprises a generator and a discriminator; a fusion image If output by the generator and a fusion image label Ir are input into the discriminator to be subjected to adversarial training; and a to-be-fused image is input into the trained fuzzy region recognition model and the fusion model to generate a fused image. According to the invention, image fusion can be realized only by collecting a few multi-focus images, the time cost andhardware cost of image fusion can be effectively reduced, and the method is especially suitable for fusion of super-large pathological section images.

The invention provides a method of utilizing a binary zone plate to design a diffraction multi-focus element, and realize an axial direction multi-focus optical path structure. The optical path structure successively comprises a diffraction multi-focus element, a focusing mirror or a lens module capable of realizing a focusing function along a laser propagation direction. A diffraction multi-focus element and a focusing mirror of corresponding specifications are designed according to laser light source parameters and objective focus parameters. The design method possesses the advantages of high efficiency, simple structure, high luminous energy utilization rate, and flexible focus quantity and energy distribution design.

The invention provides a two-photon multi-focus microscopic imaging system and method based on a spatial light modulator. The two-photon multi-focus microscopic imaging system comprises a laser lightsource, a spatial light modulator, an objective lens, a detector and a control terminal; the spatial light modulator is used for carrying out phase modulation on a laser beam according to the importedsuperimposed phase diagram which is switched at equal intervals to generate a multi-focus array; the superimposed phase diagram is formed by superposing a multi-focus array phase diagram and a linearphase grating phase diagram; the objective lens is used for projecting the multi-focus array to a sample surface to generate a multi-focus fluorescence signal; the detector is used for acquiring a multi-focus fluorescence signal to obtain a plurality of images; and the control terminal is used for processing the plurality of images to obtain a super-resolution image. According to the invention, the multi-focus array phase diagram and the linear phase grating phase diagram are loaded on the spatial light modulator at the same time, so the generation of the multi-focus array and the high-precision parallel digital random addressing scanning and excitation imaging of the sample surface are carried out, and a problem of mechanical inertia of a two-photon multi-focus microimaging system is solved; the complexity of the system is reduced, and the flexibility is improved.

The invention relates to the technical field of image processing, and particularly discloses an adaptive multi-focus restoration method based on plankton digital holographic images, which comprises the following steps of: shooting a holographic in-situ image, reconstructing the in-situ image, and performing edge detection and threshold segmentation on the reconstructed image to obtain contour information of plankton in the reconstructed image; and cutting the reconstructed image data set according to the contour information to obtain a target image data set, generating a definition index basedon the gradient and variance of the target image, screening the clewest target image based on the definition index, and splicing the clewest target image to the in-situ image according to the original coordinates to obtain the target image. According to the invention, a clear image of plankton can be extracted, a huge data processing problem existing in an acquisition system is effectively solved, the work amount of marine plankton detection is effectively simplified, and then the plankton quantity change is effectively monitored so as to forecast disasters such as red tide and the like.

Provided herein is a macroscope comprising an objective apparatus comprising a multifocal widefield optics comprising a plurality of optical components configured to focus on a plurality of planes. Also provided herein are methods for analyzing a three-dimensional specimen, the method comprising obtaining, via a macroscope, synchronous multifocal optical images of a plurality of planes of the three-dimensional specimen, wherein the macroscope comprises an objective apparatus comprising a multifocal widefield optics comprising a plurality of optical components configured to focus on a plurality of planes. The three-dimensional specimen can be a biological specimen, such as brain.

The invention discloses a processing method and apparatus, and an electronic device. The method comprises the steps of obtaining a first operation for a preview image; determining a first focus position and a second focus position in the preview image based on the first operation; adopting a first camera to focus the first focus position to obtain a first image, and adopting a second camera to focus the second focus position to obtain a second image; synchronizing the first image and the second image to obtain a synthesized image, wherein the synthesized image comprises a first image area, corresponding to the first focus position, in the first image and a second image area, corresponding to the second focus position, in the second image; and outputting the composite image to the preview display area. According to the implementation scheme, the images with different focuses acquired by different cameras in real time can be synthesized, output and displayed in the image preview mode without executing the shooting action, so a user can clearly watch the current multi-focus focusing effect in the image preview mode.

The invention discloses an automatic holder for multi-focus stacked macro photography. The automatic holder comprises a fixed plate, wherein a sliding chute is formed in the top end of the fixed plate; a sliding seat is mounted in the sliding chute in a sliding manner; the top end of the sliding seat is connected with a clamping seat; a fixed plate is fixedly mounted on one side of the top end ofthe clamping seat; a clamping plate is mounted on one side, far away from the fixed plate, of the clamping seat; the clamping plate is parallel to the fixed plate; a lead screw is fixedly mounted in the sliding chute; the lead screw penetrates through the left side and the right side of the sliding seat; a mounting groove is formed in one end, close to the lead screw, of the fixed plate; a first motor is fixedly mounted in the mounting groove; and the first motor is in transmission connection with the lead screw. The automatic holder for multi-focus stacked macro photography is reasonable in structure and novel in design, can effectively overcome the defect that a camera is difficult to keep multi-focus stacked view angles consistent in multi-focus stacked photography, effectively reducesthe shooting difficulty of multi-focus stacked macro photography, and is convenient to widely popularize and use.

The parallel multi-region imaging device includes a multi-focus generation module, a spatial demodulation module, and a detection module. The multi-focus generation module is configured to modulate illumination light to generate a plurality of focuses in an object-side, and to form a plurality of different illumination regions, thereby generating multiple paths of signal light through a sample to be imaged. The spatial demodulation module is configured to make spatial energy distribution of each path of signal light no longer overlap or make an overlapping region smaller than a target requirement. The detection module is configured to independently detect each path of signal light passing through the spatial demodulation module, so as to implement parallel multi-region imaging.

The invention discloses a method and system for real-time splicing of microscopic images and computer equipment. According to the method, a two-stage dual-network cascaded microscopic image splicing model is adopted; a pixel-level image registration network is used to directly output a pixel-level mapping table from an input image pair, and therefore, pixel-by-pixel mapping is realized, and each pixel can be aligned to an ideal alignment position. Compared with a common method of calculating a homography matrix or calculating homography matrixes corresponding to a plurality of grids, the method of the invention, based on the pixel-level mapping table, is high in precision, high in speed and capable of performing real-time processing; and a fused image is directly output from the input aligned images by using a multi-focus image fusion network, so that multi-focus image fusion is realized, all parts of the obtained spliced image are completely clear, and accurate splicing can also be realized under the condition that a weak texture region exists in an image pair overlapping region.

The embodiment of the invention provides a distributed multi-focus pulse X-ray light tube and CT equipment. The X-ray light tube comprises an anode, a plurality of cathodes and focusing electrodes which correspond to the cathodes and are distributed in a convergent state, the focusing electrodes distributed in the convergent state can enable electron beams emitted by the cathodes to converge towards the center of the anode target. In the embodiment of the invention, due to the focusing electrode in the convergent state, electron beams emitted by the plurality of cathodes can converge to the center of the anode target; therefore, after the electron beams emitted by the plurality of cathodes are focused by the respective corresponding focusing electrodes and then enter the anode, a pluralityof relatively dense focuses can be generated on the anode target, so that the imaging quality of X-rays is improved, and different imaging application occasions are met.

The invention provides a multi-focus metasurface design method based on vortex beam orbital angular momentum and an imaging device. According to one embodiment, the design method comprises the following steps: simulating the polarization conversion efficiency of a circularly polarized light beam after the circularly polarized light beam penetrates through a nano-structure unit; a target working wavelength is set, the geometric structure size of a nanostructure unit is determined, and the polarization conversion efficiency of the nanostructure unit on the circularly polarized light beam at the target working wavelength is larger than a preset value; and the nanostructure units are periodically arranged in the radius direction, and the circular polarization vortex light beam carrying the orbital angular momentum is focused at different spatial positions by combining an additional geometric phase achieved by rotating the nanostructure unit at each position around the center of the nanostructure unit. According to the method, the focusing of the incident light at different spatial positions can be realized, so that the defect that zooming is realized by depending on mechanical displacement to control the position change of the lens in a traditional optical imaging system is overcome.

The invention discloses a multi-focus artificial cornea which comprises a frame and a lens column connected with the frame in a matched mode. The frame comprises a main body structure; an opening is formed in the middle of the main body structure; the lens column is arranged in the opening in a penetrating mode; the lens column comprises a light guide structure with multiple focuses, so that a plurality of corresponding diopters are formed through the light guide structure during light zooming; and the lens column is made of a PMMA material. The invention further discloses a preparation process of the multi-focus artificial cornea. According to the multi-focus artificial cornea disclosed by the invention, through the multi-focus light guide structure, not only can a patient achieve a short-distance view field, but also a far-distance view field can be achieved; when a user sees far, light energy distributed to a far focus is improved, and a good far vision is generated, when the user sees near, due to reflection and light stimulation, light energy distributed to a near focus is improved, a good near vision is generated, and far-end and near-end view fields are achieved, and the user has a real intermediate vision.