30results about How to "Breaking through the diffraction limit" patented technology

The invention discloses a nanometer optical tweezers device and method for accurately controlling nanoparticles and biomolecules. The device includes a microscope, a microflow channel is arranged on an objective table of the microscope, the microflow channel comprises cover glass and a glass slide, two optical fibers are arranged in the microflow channel and are sleeved by glass capillaries, the glass capillaries are fixed on adjustable optical fiber adjusting frames, the other end of one of the optical fibers is connected with a Y type optical fiber coupler, two other arms of the Y type optical fiber coupler are connected with a band-pass filter and a fiber laser, the other end of the band-pass filter is connected with a photoelectric detector, and the other end of the other optical fiber is connected with a laser. The method includes the following specific steps: 1. preparing a parabola-shaped optical fiber tip used for accurate control; 2. fixing a micro lens on the optical fiber tip; 3. using the micro lens assembled in the Step 2 to capture and control fluorescent nanoparticles; and 4. capturing and controlling DNA molecules.

The invention discloses a high resolution micro-vision system based on calculating ghost imaging and a method of obtaining images. The system successively comprises, on a light path, a laser source, a first diaphragm, a laser beam expanding lens, a collimating lens, a second diaphragm, a polarizer, a spatial light modulator, a polarization analyzer, a third diaphragm, a reflector, a beam splitter mirror, a convergent lens and a CCD camera, and also comprises a precision positioning objective table located on another light path of the beam splitter mirror and connected with a computer; the computer is also separately in connection with the spatial light modulator and the CCD camera, and obtains high resolution images through the calculating ghost imaging technology. The high resolution micro-vision system has a simple and compact structure, and employs light field intensity correlation measurement to recover object information, thereby eliminating the problem of classic optical system imaging distortion, and can obtain high accuracy and contrast images. The high resolution micro-vision system is very helpful for micro-vision system design and ghost imaging technology research.

The invention provides a plasma slab lens which comprises a light-permeable substrate and a metal film made on the light-permeable substrate, wherein the metal film is provided with a levorotatory or dextrorotatory helical structure; the helical structure meets the condition that Phi is greater than or equal to 0 but is less than or equal to 2pi, wherein n is equal to 1, 2, 3...; k is equal to 1,2, 3...; rn (Phi) is a distance from a phase Phi of the No. n circle of the helical structure to the center in a polar coordinate; rn0 is the shortest distance from each circle of the helical structure to the center; and lambda sp is a wavelength of the surface plasma of the metal film. A preparing process of the plasma slab lens is compatible with an existing process, is easy to integrate and islow in cost. The center of a light source needs not be aligned with the center of the lens structure and the plasma slab lens can be more conveniently and simply used and can be easily made into a lens array; the plasma slab lens can break through a diffraction limit and has a huge focus depth; and the field intensity at a focal point can be controlled by adjusting the shape and size of the helical structure.

The invention discloses a large view field super resolution imaging device which comprises a base and a super-surface, wherein the base and the super-surface are successively arranged in the bottom-up sequence. The super-surface is composed of nano-unit structure arrays which are arranged in succession on an ultra-thin metal or a dielectric film. A nano-unit structure is a deep sub-wavelength structure. According to the invention, geometric phase on the nanostructure is used to control the electromagnetic wave symmetry; electromagnetic waves are converted from rotation symmetry to translational symmetry to acquire large view field perfect focusing near 180 degrees; if curved face or multi-plane combination is used, large view field imaging can be realized; the work bandwidth can cover the entire electromagnetic spectrum; the resolution is close to or even beyond the diffraction limit; and the device has a wide application prospect in the field of large view field super resolution imaging.

A spectrum correlation imaging apparatus comprises a light source, a splitter, a light source filter, a polarization revolver, a quarter wave plate, a splitter, a light source condenser, an optical fiber, a probe coupling seat, a probe, a reflector, a polarization analyzer, a spectral filter, a spectral collection mirror, an inner optical path spectrograph, a photoelectric receiver, a data collection processor, a signal collector, a sample workbench, and a scan controller. The apparatus of the invention has the advantages of improvement of the high resolution of near field detection, whole solidification of the whole device, simple structure, and easy operation.

The invention discloses a laser ablation processing method for quartz crystal. The laser ablation processing method specifically comprises the steps of selecting lasers, preparing control software, designing processing drawings, carrying out laser ablation, carrying out post-processing treatment and carrying out detection. The method for processing the quartz crystal is designed on the basis of limitation to the condition of each step, the quartz crystal can be effectively processed for forming various shapes and can be thinned through the processing method, the thickness of the thinned quartz crystal is small, the corresponding base frequency is high, and the strength of the processed quartz crystal is high. In addition, the processing method is simple, the processing accuracy is high, and the processing dimensional accuracy of the quartz crystal can be controlled to be within the range of +/- 5 micrometers.

The invention relates to a microscopic imaging method and system. According to the microscopic imaging method, array light spots (larger than or equal to two) are generated by utilizing a diffractionsuper-resolution element, wherein the array light spots are imaged on an object plane of the microscopic imaging system so as to realize illumination of an imaged object, and then the imaging efficiency is improved. The imaged object is scanned by utilizing the array light spots, image information of the scanned imaged object is obtained, and image reconstruction is carried out according to the image information. According to the microscopic imaging method, the diffraction super-resolution element is utilized to modulate an illumination light beam to generate the super-resolution array light spots, the diffraction limit of an optical system can be broken through, optical super-resolution imaging is realized, and the super-resolution capability is adjustable. t

The invention discloses a time-inversion super-resolution pipeline leakage monitoring method. Compared with the prior art, the invention has the advantages as follows: in allusion to the defect that ametamaterial component is required to be used near a signal source for achieving super-resolution imaging positioning in a conventional scheme, a time-inversion super-resolution time domain adjustment function is provided and designed, and through adjustment of the function, the resolution can be increased and a resolution diffraction limit can be broken through. By the time-inversion super-resolution pipeline leakage monitoring method, super-resolution is achieved by an algorithm and the metamaterial component is not required to be used, so that the time-inversion super-resolution pipeline leakage monitoring method has higher practicality and lower cost than the conventional time-reversion super-resolution imaging positioning scheme. Therefore, by using the novel technology, low-cost andsuperhigh-resolution leakage monitoring of a long-distance gas pipeline can be achieved.

The invention relates to a method for carrying out super-resolution imaging by utilizing micron-scale liquid drops generated in real time. An adopted device comprises an optical tweezer system, an imaging system and a sample pool. The method is characterized by comprising the following steps: initializing an optical tweezer system, adjusting the power of a laser to enable the power of a laser beamreaching a sample pool solution to be 1w, and forming and operating liquid drops; preparing a mixed solution, uniformly mixing a phosphate buffer solution and ethanol according to a volume ratio of 1: (3-8), and injecting the mixed solution into a sample pool; generating droplets available for imaging: the sample pool is placed on a three-dimensional displacement table, the displacement table isadjusted to enable laser beams to converge at the axial middle position of the sample pool, and the particle size of the liquid drops is controlled by controlling the laser intensity and the irradiation time; observing and imaging: after the droplet growth is completed, reducing the laser of the laser so that the droplet does not grow any more, and meanwhile, the optical trap can still capture thedroplet and adjust the displacement table to move upwards, and thus the droplet is just in contact with a specified area of the sample for observing and imaging.

The invention discloses a light focusing structure. The light focusing structure is a three-dimensional taper asymmetric structure made of photoresist; two faces of the sides of the tapered asymmetric structure are tapered planes, and the other face is a tapered arc surfacer; the bottom surface of the tapered asymmetric structure is a plane; and the surface of the tapered non-asymmetric structure is plated with a metal layer. Incident light is coupled as plasma wave on the metal surface to focus on a structure tip, which can break through a diffraction limit and makes the diameter of a focusing facula smaller than 100 nanometers. Besides, the light focusing structure has no a symmetric axis in any direction, so that the light focusing structure can effectively utilize polarized light energy of any polarization direction under radiation of a wide light spectrum light source without polarization processing and can maximally utilize the incident light energy. The light focusing structure is high in feasibility, can be used for manufacturing the optical fiber probe to be used for near field optical detection, can be applied in the optical cutting edge field like the single molecule fluorescence imaging and has a high scientific research value and a wide market application prospect.

The invention discloses a random phase shift-based optical element defect rapid super-resolution detection device and method. The device is characterized in that a laser light source is equally divided into two beams through a 1*2 optical fiber coupler I, one beam is subjected to laser polarization state adjustment through an extrusion type polarization controller, and is equally divided into two beams through a 1*2 optical fiber coupler II, the other beam of laser output by the 1*2 optical fiber coupler I is equally divided into two beams by a 1*2 optical fiber coupler III, the four beams of illumination laser are symmetrically irradiated on the surface of a sample through an entrance pupil of a microscope objective for interference to form illumination light with a two-dimensional cosine structure, the microscope objective is used for receiving reflected and scattered light of the structured illumination light modulated by the surface of the sample, and final returned imaging signal collection is completed in a high-speed camera through an imaging lens. According to the invention, the purposes of miniaturization, portability, high efficiency, random phase shift and low cost are achieved.

The invention discloses an optical fiber bundle super-resolution imaging method and system, computer equipment and a storage medium, and belongs to the field of optical fiber bundle imaging, and the method comprises the steps: obtaining a plurality of sample fluorescence images irradiated by different structured light through an optical fiber bundle; calculating and obtaining a wide-field image; calculating and obtaining a low-resolution sample image; calculating an optical fiber bundle structured light irradiation image corresponding to each sample fluorescence image; calculating a covarianceimage and an optical transfer function thereof; and calculating a reconstructed super-resolution sample image. According to the invention, the honeycomb structure of the optical fiber bundle image can be removed, and the super-resolution concept is applied to the optical fiber bundle imaging, so that the high-resolution imaging is realized.