101 results about "Interferometric imaging" patented technology

The invention relates to the technical field of optics, in particular to a gas concentration regulation and control interference imaging system applied to shape righting of a nozzle handle, a shape righting tool and a nozzle are prepared, the shape righting tool is provided with a downward pressing mechanism, the downward pressing mechanism is provided with a downward pressing telescopic column for correcting the nozzle handle, and a displacement measurement interferometer system is assembled on the shape righting tool; the displacement measurement interferometer system is provided with a reflecting movable mirror and a beam splitter, and the reflecting movable mirror is mounted on the pressing telescopic column; the displacement measurement interferometer system further comprises an interference light path stroke difference fine tuning system. The interference light path stroke difference fine adjustment system comprises a glass container for containing sulfur hexafluoride, the end faces of the two ends of the glass container are flat and transparent, the glass container is arranged on a light path between the beam splitter and the reflective moving mirror, and the end faces of the two ends of the glass container are perpendicular to laser on the light path; the glass container is provided with an air supply port; the air supply port is connected to an air pump, and the air pump is connected with a sulfur hexafluoride air source. And the shape correcting position of the nozzle handle is accurately controlled.

This invention discloses a particle morphology recognition method based on YOLOv7 and interferometric imaging technology. The method uses an interferometric particle imaging system to obtain interferometric defocused images of a mixed particle field to create a dataset. The annotated interferometric defocused images are divided into training, validation, and test sets. The network is then improved by incorporating a collaborative attention module to enhance detection accuracy. Hyperparameters are adjusted, and training and testing are performed using the annotated dataset. After 200 epochs of training, the optimal weights are obtained, ultimately achieving mixed particle field morphology recognition. This method can achieve high-precision identification of particle morphology in mixed particle fields, providing technical support for acquiring cloud particle field information.

This invention relates to the field of optical imaging and detection technology, specifically providing a broadband snapshot-type polarization interferometry imaging detection system and method for breast tumors. A broadband light source illuminates a breast tumor tissue sample. The reflected signal light is collected and collimated by a pre-optical system, then sequentially passes through a first and a second ray shaping unit for two shearing and two polarization state transformations, resulting in two beams of linearly polarized light and two beams of circularly polarized light. These beams are imaged by an imaging lens to an area array detector to obtain a polarization interferogram, which is then demodulated to obtain all Stokes parameters of the breast tumor tissue sample. This invention achieves broadband snapshot imaging of breast tumors with all Stokes parameters without using an analyzer, doubling the light throughput compared to traditional polarization imaging instruments using analyzers. Furthermore, this invention has advantages such as compact structure, no moving parts, easy assembly and adjustment, and no need for image registration.

The invention relates to the technical field of film defect detection, and discloses a film defect detection system based on differential interference imaging technology, comprising: a frame provided with a transmission module for transmitting a film to be detected; the visual detection module is arranged in the rack and is used for carrying out defect detection on the thin film in the conveying process; the visual detection module comprises a differential interference visual detection unit, a lighting unit and an adjusting unit. According to the thin film defect detection system based on the differential interference imaging technology, the angles of the differential interference visual detection unit and the illumination unit can be synchronously adjusted, illumination treatment can be performed on a thin film in real time, and bending treatment can be performed on the thin film to be detected; further, defects on the surface of the thin film are deformed or displaced under the action of bending stress, and the defect exposure effect is enhanced; and real-time detection of the film in different bending states is carried out in cooperation with the differential interference visual detection unit.

The invention relates to the technical field of automatic optical detection, and discloses a product appearance defect identification method and system based on multi-modal imaging, and the method comprises the steps: obtaining interference imaging, polarization imaging and scattering imaging data sequences at multiple moments, extracting an instantaneous phase and an instantaneous frequency at each moment by utilizing Hilbert transform, and generating a time sequence phase-frequency characteristic image set; processing interference fringe data at each moment based on a phase unwrapping algorithm, and outputting a time sequence phase evolution matrix; learning an interlayer phase propagation rule by using a space-time diagram convolutional network, and generating hierarchical defect evolution representation; and predicting a spatio-temporal evolution trajectory of the defect through four-dimensional gradient calculation, and outputting a four-dimensional morphological parameter and a development trend of the defect. Through a deep coupling mechanism of a multi-scale phase evolution kernel function and a space-time diagram network, the limitation that spatial distribution and time evolution of phase information cannot be processed at the same time in a traditional method is overcome.

The application relates to an online monitoring device and method for microelectrodes, and belongs to the technical field of special machining.The online monitoring device is composed of a coaxial holographic imaging module, an LED backlight imaging module, a motion control module, an image acquisition card, a laser power controller and an LED brightness controller.The LED backlight imaging module is used for positioning the microelectrode image; the coaxial holographic imaging module is used for holographic interference imaging of the microelectrode; based on a holographic reconstruction algorithm, electrode profile information is obtained, and the electrode loss degree is judged.The coaxial holographic imaging module and the LED backlight imaging module switch the positions of the reflecting mirrors through the motion control module to realize control of different imaging modes; the collected images are input into a PC through the image acquisition card, image algorithm analysis is carried out, and the microelectrode loss degree is judged.The application realizes online monitoring of the microelectrode loss.

The invention relates to an interference imaging device for phase feedback compensation quasi-real-time calibration, and belongs to the technical field of interference imaging. The calibration device comprises an X / Y direction light path, a controller and a linear displacement table. The X-direction light path structure and the Y-direction light path structure are the same, and each of the X-direction light path structure and the Y-direction light path structure comprises two parallel coupling lenses, an interference assembly and a photoelectric detection assembly which are sequentially arranged in the light incidence direction; the linear displacement table is cross-shaped; four paths of coupling lenses of the X-direction light path and the Y-direction light path are fixed through a linear displacement table and are uniformly arranged around the central point of the cross-shaped linear displacement table; the interference assembly receives the light beams output by the two parallel coupling lenses, performs phase modulation on the light beams, enables the two light beams to perform interference, and outputs an interference light signal to the photoelectric detection assembly; the photoelectric detection assembly converts the interference optical signal into an interference electric signal; the controller is used for sending a control signal to the interference assembly to control phase modulation of the interference assembly and receiving an interference electric signal output by the photoelectric detection assembly.

A composite material gas cylinder layering defect displacement prediction method based on deep learning and laser shearing speckle interference comprises the following steps: constructing a training data set combining simulation data and experimental data, generating the simulation data based on a shearing speckle interference imaging principle, and combining the experimental data acquired by an experiment to predict the layering defect displacement of a composite material gas cylinder. Constructing a mixed data set containing a wrapped phase diagram and an out-of-plane displacement diagram; constructing a deep convolutional neural network fused with an attention mechanism, and extracting displacement features from high-frequency stripes: starting from an input layer, sequentially connecting an encoder path, a bottleneck layer, a decoder path and an output layer; constructing a composite loss function and training the network, and constructing a composite loss function comprising a pixel-level error constraint and a gradient consistency constraint; and utilizing the trained deep learning neural network to predict out-of-plane displacement response at the layering defect of the gas cylinder. According to the method, the problems of image distortion, data missing and the like caused by a traditional phase unwrapping algorithm are effectively solved, and the out-of-plane displacement field can be accurately, smoothly and continuously reconstructed.

The invention relates to the technical field of optical interference imaging, in particular to a high-resolution image fusion method based on a one-dimensional sparse aperture rotating pupil. Comprising the following steps: inputting a target image, imaging the target image by adopting a one-dimensional sparse aperture rotation pupil, and obtaining one image when the target image is rotated to an angle; performing non-subsampled contourlet transform to obtain a low-frequency image and a high-frequency image corresponding to each image; performing equal-weight superposition and normalization on the plurality of low-frequency images and the plurality of high-frequency images; repeating the steps to construct a data set; establishing a double-branch residual fusion network; through a residual learning strategy, high-frequency branch detail information is extracted, and global linear transformation is carried out on the low-frequency image; and fusing the residual image of the high-frequency branch and the adjusted low-frequency image, and outputting a final high-resolution image. The method has the advantages that effective information is accurately extracted, a data set required by training is simplified, full-spectrum coverage is obtained through fewer sub-apertures, and an imaging effect equivalent to a larger aperture is achieved.

The invention discloses a digital differential interference imaging method, and belongs to the technical field of optical imaging and microscopic imaging. The method comprises the steps that bright field illumination is used, a first image and a second image are collected at defocus positions which are vertically symmetrical on a sample focal plane respectively, and the defocus distance is larger than the physical depth of field of an objective lens; and carrying out pixel-level gray value subtraction on the two images to obtain a digital differential phase image. Digital image processing is adopted to replace optical shearing and interference of a traditional DIC, a polarized optical element and a special DIC prism are not needed, the system cost and complexity are remarkably reduced, the system can be compatible with non-standard optical material sample containers such as a plastic culture dish, and the directional shadow problem of the traditional DIC is solved. Meanwhile, by providing two specific implementation modes, namely accurate positioning acquisition and automatic focusing fusion acquisition, the imaging efficiency and the system robustness are further improved on the basis of ensuring the high contrast and the pseudo three-dimensional relief imaging effect.

The application discloses a spaceborne near-space horizontal two-dimensional wind field interferometer based on a ring-shaped field of view and a full-link simulation method, the imaging instrument comprises an optical system, a detector and a data processing unit, the optical system comprises, in sequence along an optical path, a front cone mirror, a field of view diaphragm, a collimating lens group, a Fabry-Perot interferometer, a narrow-band filter assembly and an imaging lens; and the application improves the time-space resolution of instrument detection.

This invention discloses a deep-ultraviolet nanosecond-gated Raman and LIBS detection system and method for suspended soil particulate matter nutrients, belonging to the field of optical and smart agriculture sensor technology. The system includes: a laser ejection sampling unit for in-situ soil ablation to generate aerosols; an optical tweezers unit for capturing and suspending individual soil particles; a deep-ultraviolet laser excitation unit for emitting nanosecond dual-pulse lasers to excite the same particle to generate Raman and LIBS signals; a spatial heterodyne spectral interferometry imaging unit for slitless, high-throughput coaxial signal collection and the formation of interference fringes; and a timing control unit for time-division multiplexing detection of Raman and LIBS signals through nanosecond gating. This invention eliminates matrix effects and achieves highly sensitive in-situ, non-destructive, and synergistic detection of atomic and molecular information in single soil particles. Furthermore, Raman and LIBS are used to distinguish the organic content and total composition of nitrogen, phosphorus, and potassium, enabling precise quantification of soil nutrients.

This invention relates to the field of safety monitoring and disaster early warning technology for deep underground engineering, and discloses an intelligent rockburst dynamic risk prediction method integrating real-time microseismic data. This method first constructs a high-precision medium model reflecting the real-time stress and attenuation characteristics of the rock mass based on background noise interferometric imaging and the adjoint state method inversion. Then, it reconstructs a four-dimensional energy density field, defines and calculates the waveguide locking index to accurately screen key energy localization regions. Subsequently, it extracts the energy residual sequence of the key regions, calculates the lag first-order autocorrelation coefficient and time-domain variance, and uses the critical slowing theory to determine the precursors of system dynamic instability and trigger graded early warnings. This invention corrects imaging biases caused by energy dissipation through physics-driven medium parameter inversion, and combined with data-driven nonlinear dynamic analysis, achieves accurate spatiotemporal positioning of the rockburst incubation core area and early identification of disaster risks.

This invention relates to the field of remote sensing satellite orbit control technology, and discloses a satellite autonomous pipeline control method based on differential interferometric SAR imaging missions. The method includes: acquiring initial satellite orbit parameters; employing a multi-objective optimization algorithm for orbit optimization under a high-order gravity field; sampling and constructing a reference orbit point set; calculating orbit control deviations based on the actual orbit and the reference orbit; generating orbit control triggering rules and avoidance strategies through ground system simulation; executing orbit control strategy generation and control onboard system; and evaluating orbit control effectiveness and the evolution trend of orbit control deviations through the ground system. Existing technologies mainly rely on ground command injection, making it difficult for satellites to achieve efficient autonomous orbit control when performing heavy-orbit differential interferometric SAR imaging missions, and hindering the decoupling of orbit control and imaging tasks. This invention improves the efficiency and autonomy of orbit control, the execution efficiency of imaging missions, and the safety of on-orbit operation by constructing a closed-loop control system encompassing satellite-ground collaboration, strategy formulation, command execution, and effect evaluation.

The present application relates to the field of spectral imaging, and especially to a ridge stepped Fabry-Perot interferometric imaging spectrometer, comprising a scanning mirror, a telescope objective, a Fabry-Perot array interference system and a detection system, the scanning mirror is located on the object focal plane of the telescope objective, and performs lateral push scanning on a target light field; the telescope objective adopts an image far field optical path structure, and is used for collecting the target light field and imaging the target light field in an FP resonant cavity of the Fabry-Perot array interference system; the Fabry-Perot array interference system is located on the image focal plane of the telescope objective, and comprises parallel plates and a ridge stepped mirror, the step height of the ridge stepped mirror is in a decreasing distribution from the middle to both sides; the detection system is located in the exit direction of the Fabry-Perot array interference system, and is used for imaging the interference light field modulated by the Fabry-Perot array interference system to obtain an interference image array. The present application has the advantages of small volume, light weight, compact structure, static state, stability, reliability and the like.

The invention discloses a sea surface height inspection equipment layout method based on an interference imaging altimeter, which belongs to the technical field of altimeter inspection, is used for sea surface height inspection equipment layout, and comprises the following steps: obtaining position data of a Glider buoy and temperature-salinity-depth data of a profile observed by the Glider buoy, putting the Glider buoy and a GNSS buoy in the same area at the same time before a satellite passes, and putting the GNSS buoy in the same area at the same time; the synchronous observation of the GNSS and the Glider buoy is realized; and carrying out position positioning when the Glider buoy descends and ascends to outcrop, carrying out matching with a grid position in a swath range observed by a satellite, and carrying out sea surface height inversion according to temperature-salinity-depth data of a section obtained through observation of the Glider buoy. The method adapts to data characteristics of different resolutions of the interference imaging altimeter, sea surface height synchronous observation of satellite data with different spatial resolutions under satellite transit is realized, and calibration inspection of the altimeter satellite is accurately completed.

The invention belongs to the field of airborne interference imaging altimeter error correction, and particularly relates to a platform and baseline error correction method based on an airborne interference imaging altimeter, which comprises the following steps of: acquiring a height measurement data sequence X1 continuously acquired along a flight path; preprocessing the X1 to obtain a preprocessed data matrix X2; performing empirical orthogonal function decomposition on the X2 along the rail direction, and extracting a spatial mode, a time coefficient and a characteristic value; determining a main characteristic mode according to a variance contribution rate corresponding to the characteristic value; identifying and separating a platform error component, a baseline error component and a real height signal component by combining distribution characteristics of a space mode and a time coefficient; and reconstructing a real height signal based on a separation result to realize comprehensive correction of a platform error and a baseline error. According to the method, the platform error and the baseline error which are different from real signals in space-time characteristics are effectively separated through EOF decomposition, and the height measurement precision of the airborne interference imaging altimeter is remarkably improved.

The application discloses a phase-adjustable nulling interference system and relates to the field of photoelectric measurement, which comprises a first telescope and a second telescope, a first collimating lens, a second collimating lens, a phase adjusting device, multiple plane mirrors, a beam splitter, a convex lens, a detector and a control device. Incident light passes through the first and second telescopes and is converted into parallel light beams by the first and second collimating lenses. One of the light beams is subjected to phase adjustment by the phase adjusting device, and then the two light beams continue to transmit through the multiple plane mirrors. At the beam splitter, the two light beams are coherently superposed to generate an interference pattern. The pattern is focused on the plane of the detector by the convex lens to form an interference image available for analysis. The detector receives the image and transmits it to the control device, the control device processes and analyzes the image and controls the phase adjusting device to adjust the phase difference between the two light beams, so that the movement of the interference fringes is realized.

A radial shearing interferometer based on a bifocal photonic sieve includes two identical bifocal photonic sieves, an image detector, and a computer. The focal points of the two bifocal photonic sieves correspond to each other, generating two 4f systems. This causes the incident wavefront to be measured to be split into two beams of different sizes, which undergo shearing interference on the image detector. The computer can extract the shearing phase difference from the interferogram received from the image detector, thus obtaining the phase information carried in the beam. This invention features a simple structure, low requirements for the experimental environment, and strong anti-interference capability, and can be applied to many fields such as wavefront detection, interferometric imaging, and adaptive optics.

The invention discloses a test method for rapidly measuring PCB (Printed Circuit Board) back drilling, which comprises the following steps of: S1, manufacturing mask plates containing drilling information and mark points of a PCB based on a PCBGerber file, and accurately attaching the mask plates to the upper surface and the lower surface of the PCB; s2, building a large-view optical interference measurement system, imaging the PCB attached with the mask plate through a parallel light lens in the large-view optical interference measurement system, scanning the PCB and recording all drilling position information; and S3, performing interference with the reference plane, and calculating the back drilling depth by using an optical path difference formula sigma = 2 * lambda * delta n according to the recorded drilling position information and the phase of interference imaging. According to the method, the measurement efficiency is remarkably improved, and the problem that a traditional measurement mode cannot meet online full inspection is solved. Through a large-view optical interference scheme, measurement of tens of thousands of holes can be completed within seconds, and compared with traditional modes such as single-point manual measurement and fixed point laser measurement, the efficiency is obviously improved, and the rhythm requirement of online production is completely met.

The invention discloses a satellite-borne FPI wind measurement interferometer device with temperature control, which comprises an external telescope system and an FPI interference imaging system, and is characterized in that the external telescope system receives radiation light and introduces the radiation light into the interference imaging system; the interference imaging system sequentially comprises a collimation system, an optical filter system, an etalon system and an imaging system in the light propagation direction. The collimation system receives radiation light introduced by the external telescope; the etalon system comprises a temperature control structure; the temperature control structure comprises a heat conduction ring wrapping the outer side of an etalon inner cylinder of the etalon system; and a plurality of annular heat pipes for circumferential heat conduction are embedded in the outer surface of the heat conduction ring. The device also comprises a sliding support structure which enables the lens barrel to freely slide along the optical axis direction. The temperature control system has the advantages that optical errors caused by thermal stress are effectively eliminated, thermal stability and thermal field uniformity are remarkably improved, and the temperature control system is simple in structure and high in reliability.

The application provides a significant wave height extraction method based on a synthetic aperture radar image, step 1: data acquisition, matching the altimeter significant wave height with the synthetic aperture radar interferometric imaging mode data to obtain a sample data set. Step 2: the data amount of the altimeter significant wave height in different incidence angle ranges is counted to obtain the numerical distribution of the altimeter significant wave height in the global near-shore range. Step 3: the normalized variance of the backscattering coefficient of the synthetic aperture radar and the altimeter significant wave height are subjected to quality control to obtain the significant wave height and normalized variance data. Step 4: a linear relationship between the significant wave height and the normalized variance is established. Step 5: the estimated value of the synthetic aperture radar significant wave height is evaluated and verified, and the significant wave height can be obtained by inputting only a single image parameter, the normalized variance. The application not only considers the synthetic aperture radar open ocean wave mode, but also relates to the near-shore research, and provides technical support for the development of related topics in the coastal area.

The invention provides a phase amplification microscopic imaging method with sub-angstrom level measurement precision. The method comprises the following steps: providing a phase cavity implementation method and connecting the phase cavity with an interference imaging system so as to effectively amplify a weak phase signal of a target sample; modeling the resonance effect in the phase cavity; and optimizing parameters of the phase cavity, such as a material of the phase cavity, a thickness of each layer of the phase cavity, and an illumination wavelength, to maximize amplification of the phase signal of the target sample. The phase cavity is arranged on the sample side of the interference imaging system. The method may further include obtaining a phase diagram through an interference imaging system based on laser illumination, and executing a transmission matrix-based model on the measured phase diagram to reconstruct a thickness mapping result, enabling effective detection of deep sub-wavelength size defects in the three-dimensional stacked sample. The measurement precision of the interference imaging system can reach 0.1 angstrom.

The application discloses a sea surface height inspection equipment layout method based on an interferometric imaging altimeter, belongs to the technical field of altimeter inspection, and is used for sea surface height inspection equipment layout, and comprises the following steps: obtaining position data of a Glider buoy and temperature-salinity-depth data of a profile observed by the Glider buoy; before a satellite passes, the Glider buoy and a GNSS buoy are simultaneously and regionally launched, and synchronous observation of the GNSS and the Glider buoy is realized; the Glider buoy is positioned when descending and ascending to the outcrop, is matched with a grid position in a swath range observed by the satellite, and sea surface height is inverted by using the temperature-salinity-depth data of the profile observed by the Glider buoy. The application is suitable for data characteristics of different resolutions of the interferometric imaging altimeter, realizes synchronous observation of sea surface height under satellite passing by using satellite data of different spatial resolutions, and accurately completes calibration inspection of the altimeter satellite.

The present invention relates to the field of optical interference imaging technology, and in particular to a high-resolution image fusion method based on a one-dimensional sparse aperture rotating pupil. The method comprises: inputting a target image, imaging the target image using a one-dimensional sparse aperture rotating pupil, and obtaining an image for each rotation to an angle; performing a non-subsampled contourlet transform, and obtaining a low-frequency and high-frequency image for each image; performing equal-weighted superposition and normalization on multiple low-frequency images and high-frequency images; repeating the above steps to construct a data set; establishing a dual-branch residual fusion network; extracting high-frequency branch detail information through a residual learning strategy, and performing a global linear transformation on the low-frequency image; fusing the residual map of the high-frequency branch with the adjusted low-frequency image, and outputting a final high-resolution image. The advantages are: accurate extraction of effective information, streamlining of the data set required for training, obtaining full spectrum coverage through fewer sub-apertures, and equivalent imaging effects of a larger aperture.

The application relates to a method for in-situ measuring the dissolution rate of an optically measurable solute in an organic matter environment, and relates to the technical field of solute dissolution rate measurement. The method comprises steps S1 to S5. S1: obtaining a sample to be measured, and coating an inert film on a non-test surface of the sample to be measured to obtain a coated sample. S2: obtaining an initial three-dimensional image of the coated sample by coherent light interference imaging technology, and extracting an initial surface height at the test surface. S3: obtaining an organic matter solution, and continuously flushing the surface of the coated sample with the organic matter solution. S4: obtaining a three-dimensional image of the coated sample after flushing by coherent light interference imaging technology, and extracting a dissolution surface height at the test surface. S5: combining the molar volume of the sample to be measured, and calculating the dissolution rate according to the change rate of the surface height of the initial surface height and the dissolution surface height.

The present invention relates to the field of optical technology, and more particularly to a gas concentration controlled interferometric imaging system for nozzle handle correction. The system comprises a correction tool and a nozzle. The correction tool is provided with a downward pressing mechanism having a downward pressing telescopic column for correcting the nozzle handle. The correction tool is equipped with a displacement measuring interferometer system. The displacement measuring interferometer system also comprises a reflective mirror and a beam splitter, with the reflective mirror mounted on the downward pressing telescopic column. The displacement measuring interferometer system also comprises an interference optical path stroke difference fine-tuning system. The interference optical path stroke difference fine-tuning system comprises a glass container containing sulfur hexafluoride, with both ends of the glass container having flat and transparent end surfaces. The glass container is positioned in an optical path between the beam splitter and the reflective mirror, with the end surfaces of the glass container perpendicular to the laser beam on the optical path. The glass container is provided with an air supply port connected to an air pump connected to a sulfur hexafluoride gas source. The correction position of the nozzle handle is precisely controlled.

The invention discloses a compact shear speckle interference system, which is suitable for detection scenes with large view field and small view field in narrow space, and a replaceable front lens is arranged between an object to be detected and an interference imaging optical system and comprises a wide-angle lens, a standard lens, a micro-focus lens, an endoscopic lens and the like; the interference imaging optical system comprises a beam splitter prism, double interference arms and hyperboloid reflectors, and the two hyperboloid reflectors are tightly attached to the beam splitter prism; diffuse reflection speckle light of an object to be measured is divided into transmission light beams and reflection light beams by the beam splitter prism, the transmission light beams and the reflection light beams are transmitted through the double interference arms, reflected and focused through the curved reflector and then return along the same path, and interference fringe patterns carrying object deformation information are formed through beam combination interference. The PZT assembly drives the single curved-surface reflector to perform nanoscale micro-movement along the optical axis to realize phase modulation, and the two-dimensional precision displacement table drives the curved-surface reflector to perform micro-movement perpendicular to the optical axis to regulate and control the imaging shear amount. The optical system is compact in structure, excellent in dynamic response, flexible and adjustable in view field and high in optical stability.

The present application relates to a kind of non-contact measurement cell Young's modulus method, including quantitative phase microscopy system measurement cell phase diagram, by off-axis interference quantitative microscopic imaging system, phase delay caused by cell thickness, cell internal dry matter distribution is obtained by shooting;Further by the derivative and fluctuation of phase delay, qualitative contrast different cell Young's modulus size.The off-axis interference imaging system is composed of reference light path and sample light path, sample light path passes through transparent biological sample, reference light path and sample light path have a certain offset angle, and are coupled with sample light path to obtain the final interference figure;The present application can not only realize non-contact measurement cell demonstration modulus, but also still maintain good effect under low resolution low power lens, provide solution train of thought for large field of view parallel cell cluster Young's modulus measurement.

An imaging method includes: (I) simultaneously illuminating a scene with a first (second) diverging wave originating from a first (second) location and modulated with a first (second) shift-and-add-qualifying-code. A scatterer that scatters the first (second) diverging wave as a first (second) speckle. (II) Detecting, with a receiver, an interference signal, produced from interference between the speckle fields, and including a code temporally shifted with respect to the first SAA-code by a large-scale time-shift. (III) Circulantly correlating the interference signal with a reference SAA-code to generate a correlation signal. (IV) Determining the time-difference-of-arrival from the large-scale time-shift. (V) Determining a location of the scatterer by: determining, from the time-difference-of-arrival, a hyperbolic contour that locates the scatterer angularly; and determining, from one of (i) a small-scale time-shift of a peak of the correlation signal and (ii) a ranging delay, an elliptical contour that locates a range of the scatterer from the receiver.