46 results about "Object wave" patented technology

The invention discloses wavefront measurement method and device based on a multiple-pinhole plate. The wavefront measurement method comprises the following steps of: irradiating a measured object wave to the multiple-pinhole plate containing one reference pinhole and multiple measurement pinholes; recording an intensity distribution pattern of a Fraunhofer diffraction light field of the object wave transmitting the multiple-pinhole plate by an image sensor, wherein the Fraunhofer diffraction light field is in direct proportion to the Fourier transform of the object wave transmitting the multiple-pinhole plate; carrying out inverse Fourier transform on the recorded intensity distribution pattern, and extracting the function values of points which correspond to the center positions of the measurement pinholes of the multiple-pinhole plate in the inverse Fourier transform pattern, wherein the function values is in direct proportion to the complex amplitude values of the measured object wave on the measurement pinholes; and reproducing an imaged object in a computer by utilizing the complex amplitude values. The invention increases the diffraction imaging speed, has simple structure, convenient regulation and low cost, is suitable for multiple different light sources and can realize the real-time wavefront sensing and the diffraction imaging of a pure-phase object and a plural object or a three-dimensional object.

An embodiment of the invention discloses an order processing method, a device thereof, a server and a storage medium, wherein the method comprises the steps of identifying an order form, and marking the order according to the identified order form, wherein the order form comprises a single-item single-object kind; determining single-item single-object orders according to the mark of the order form, combining the single-item single-object orders for obtaining at least one single-item single-object wave task so as to perform sorting on the single-item single-object wave task. The single-item single-object wave task comprises at least one single-item single-object order. The order processing method, the device thereof, the server and the storage medium can improve sorting and composite packaging efficiency of the single-item single-object orders and efficiency of the whole warehousing operation flow.

According to one aspect, the invention relates to a device (20) for three-dimensional imaging by full-field interferential microscopy of a volumic and scattering sample (1) comprising an emission source (201) for emitting an incident wave with low temporal coherence, an imaging interferometer (200) of variable magnification, allowing for the acquisition of at least one first and one second interferometric images resulting from the interference of a reference wave obtained by reflection of the incident wave on a reference mirror (205) and an object wave obtained by backscattering of the incident wave by a slice of the sample at a given depth of the sample, the at least two interferometric images having a phase difference obtained by varying the relative path difference between the object and reference arms of the interferometer, a processing unit (206) for processing said interferometric images making it possible to obtain a tomographic image of said slice of the sample, means for axially displacing the interferometer relative to the sample allowing for the acquisition of tomographic images for slices at different depths of the sample and means for varying the magnification of the imaging interferometer allowing for the acquisition of interferometric images of a slice of the sample for different magnification values.

The invention discloses a coherent diffraction imaging method and processing device thereof. The object wave passes through a rotary multi-pinhole plate. The Fraunhofer diffraction intensity distribution pattern of the object wave passing through the multi-pinhole plate is recorded by an image sensor. The diffraction intensity distribution is subjected to inverse Fourier transformation to obtain the correlation function pattern of the recorded object wave, the amplitude and phase information of the object wave to be measured are directly extracted from the points corresponding with each measurement pinhole center position coordinate in the correlation function pattern and the diffraction imaging of the complex amplitude object is realized in the computer. The coherent diffraction imaging method has no need of any iterative process and greatly reduces the requirement of the scanning recording process and positioning accuracy and increases the diffraction imaging speed, with other features of simple processing device, convenient adjustment, lower cost, suitable of various different light source, and the imaging of the complex object or three-dimensional object can be realized without imaging lens, especially suitable for the situation that it is difficult to prepare high-quality X-ray using the imaging lens.

A method of structured illumination digital holography includes: (a) providing a structured illumination generating unit and binarization random number encoding unit to generate a coded structured illumination pattern; (b) sampling at least two patterns with phase shift which synthesized as a single structured illumination pattern to be encoded; (c) forming a single digital hologram, and wavefront reconstructing the single digital hologram; (d) performing a compressive sensing approach to recover the object wave with at least two phase shift patterns; and (e) reconstructing the separation of overlap spectrum, to obtain an image covering bandpass spectrum with different high frequency and low frequency.

A method for preparing a digital hologram representing an image of an object, which includes generating a measurement beam and a first reference beam, irradiating the object by the measurement beam and guiding the measurement beam reflected to an optical sensor. The method also includes guiding the first reference beam to a first mirror, extending under an angle different from 90° with the optical axis of the first reference beam, and guiding the reflected beam to the optical sensor so that both beams generate an interference pattern on the sensor. The method further includes reading out the sensor and providing a digital signal representing the interference pattern on the optical sensor, and processing the signal to obtain a digital hologram.

[Problems] To provide a reverse X-ray photoelectron holography device, in which energy control and convergence are facilitated and a hologram of good contrast is obtained; and to provide its measuring method.

[Means for Solving Problems] A Reverse X-ray photoelectron holography measuring method where a measurement sample is irradiated with an electron beans, incident angle and rotation angle of the electron beam are varied by varying the posture of the measurement sample to the electron beam, and a variation in intensity of characteristic X-ray emitted when the measurement sample is excited is recorded as the atomic resolution hologram around the atom of a specific element, wherein, when the intensity is detected as the characteristic X-ray of the atom of the measurement sample, an object wave is generated as an electron wave scattered by the reference wave and the proximity atom in a holography where electrons incident to the measurement sample reach an atom generating specific X-ray as an electron wave, and an interference pattern is formed by compounding the reference wave with the object wave, thus monitoring the intensity of an electron beam.

A lensless diffraction imaging method based on complementary random sampling is characterized in that a group of binary random sampling screens with complementary characteristics is introduced; the group of binary random sampling screens is arranged between a to-be-tested object and a record plane in sequence, and intensity patterns of object waves passing through the sampling screens on the record plane are sequentially recorded; the complex amplitude distribution of to-be-tested object waves is recovered from the recorded intensity patterns, and the digital diffraction operation is conducted using the recovered complex amplitude distribution, so as to obtain the diffraction imaging of the to-be-tested object at any spatial position. According to the method, the complementary random sampling screens are inserted between the object and the record plane, so that the accuracy and the iteration efficiency of phase retrieval are greatly improved; meanwhile, wavefront sampling loss caused by the binary random sampling in the traditional method can be effectively eliminated. In addition, as the iteration operation process is only applied to the sampling plane and the record plane, the method is suitable for general complex-valued objects and does not place special limits on the object.

The invention discloses a high-resolution digital holographic image acquisition device. The first beam irradiates the sample after the beam emitted by the laser passes through the beam splitting device, and the second beam is converted into spherical light waves through the beam expander and the first beam after irradiating the sample. The light beam forms an interference area, and the linear array CCD is arranged on a two-dimensionally movable micro-displacement platform and is located in the interference area. The point source of the spherical light wave is equal to the optical path of the object light wave from the sample to the linear array CCD. The computer It is electrically connected with the linear array CCD and the micro-displacement platform. The linear array CCD push-brooms the interference fringes generated by the first and second light beams to collect and synthesize a digital hologram, and the digital hologram is numerically reconstructed by the computer through fast Fourier transform algorithm and digital image processing, etc. Finally, a high-resolution digital holographic reconstruction image is obtained. The invention effectively increases the area of ​​the recorded hologram, improves the resolution of the digital hologram reproduced image, and increases the field of view.

The present invention discloses a method and its associated apparatus to retrieve the amplitude and, especially, the phase of nonlinear electromagnetic waves. The application field of the present invention is optical imaging. A sample is probed by coherent electromagnetic radiation, and by a nonlinear interaction such as harmonic generation a nonlinear object wave is emitted. A nonlinear reference wave is generated by interaction of the same nature with the coherent electromagnetic radiation, and an interference between the nonlinear object wave and the nonlinear reference wave is sensed by a detector array. As an example, the technique makes possible real-time nanometric localization and tracking of nonlinear field emitters, such as, but not limited to, nanoparticles.

The invention discloses a compact type collimating common optical path phase shifting digital holography imaging system and method. The system comprises a laser, a plane mirror, a microobjective, a pinhole, a collimating lens, a line polarizing film, an unpolarized splitting prism and a coating film reflector, and the coating film reflector is connected with piezoelectric ceramics; a picture sensor collectors a hologram, wherein the hologram is obtained by interference of object waves irradiated to objects and reference optical waves reflected by the coating film reflector, a two-dimensional rotation regulating frame with the unpolarized splitting prism is adjusted for adjusting the object light wave angle, the piezoelectric ceramic is controlled to achieve reference optical wave phase shifting, the hologram is analyzed and rebuilt through a phase shifting algorithm and a diffraction propagation method , and an imaging result is obtained. The system can adjust the two-dimensional rotation regulating frame by compactly arranging the coating film reflector driven by the piezoelectric ceramic and the unpolarized splitting prism, and the piezoelectric ceramic is controlled to obtain the holography, so that the imaging stability, practicability and reliability are effectively improved, and the system is simple and easy to obtain.

The invention relates to the technical field of manufacturing of a color computer generated hologram, in particular to a transmission method of color computer generated hologram color information, which is characterized by comprising the following steps of: 1) obtaining the tristimulus values Re, Ge and Be of colors in an electronic display color system; 2) converting the tristimulus values Re, Ge and Be of the colors in the electronic display color system into the tristimulus values Rh, Gh and Bh in a color computer generated hologram color system; and 3) converting the tristimulus values Rh, Gh and Bh in the color computer generated hologram color system into the object wave amplitude of the computer generated hologram. By adopting the method, the value of any color in the electronic display color system can be converted into the value of the color in the computer generated hologram color system, the corresponding object wave amplitude for the computer generated hologram code can be obtained, the digitalized color computer generated hologram can be obtained via the hologram code and output via a device, and thus the optically reproducible color hologram can be obtained.

The device comprises the laser light source, the beam-expanding telescope, the beam splitter, the reflector, the cylindrical mirror and the recording media. The laser beam from the laser source being expanded by the telescope enters the beam splitter to divide the beam into two light beams: the reflected beam and the transmitted beam. The reflector reflects the reflected beam passed through the cylindrical mirror to the recording media as the object wave. The reflector reflects the transmitted light to the holographic recording media as the reference wave. The interference between the object wave and the reference wave forms hologram recorded on the media. The spatial frequency of the variable frequency grating made by the device is changed in linearity.

An apparatus for capturing a Fourier hologram splits a coherent light source into an object beam and a reference beam, sets a distance of a virtual focal plane of a subject, generates spherical wave field data propagated from a point source of the virtual focal plane to a central coordinate plane of a spatial light modulator, generates a spherical wave field on a space from the spherical wave field data and the reference beam by the spatial light modulator, synthesizes an object wave field generated by reflecting the object beam by the subject and the spherical wave field with each other so that an interference pattern is formed on the image sensor face, captures the interference pattern formed on the image sensor face, and then performs Fourier transformation to calculate an object wave field formed on the focal plane of the subject.

The invention discloses a digital holographic image reconstruction method based on deep learning, and the method comprises the following steps: S1, collecting an original image, and carrying out the sampling of the original image; s2, discarding part of data after sampling is completed, and compressing the data; s3, data transmission is performed after compression is completed, and the data is transmitted to a lower computer needing to be played; s4, the lower computer decompresses the compressed packet to which the data is transmitted; s5, after compression is completed, image restoration iscarried out, and the image is displayed; the structure is scientific and reasonable, safe and convenient use, a data acquisition card is subjected to A/D conversion and quantization post-processing, acomputer technology is introduced, and numerical calculation of a computer is utilized to simulate an object wave model function and an optical interference function, so that image data conversion isfacilitated, the conversion efficiency is improved, the transmission speed is reduced after compression, data is transmitted to a cloud end, and safety and reliability are achieved.

The present invention relates to a microscope for quantitative measurements of the wavefront, comprising:

• • means for the illumination of a sample (T);
  • an objective lens (2);
  • an ordered two-dimensional arrangement of lenses (3), with a spacing p_μ greater than 500 μm and a relative aperture of less than 10;
  • an image sensor (4) located in a capture space (Ec) to receive the light scattered by the sample (T), and to acquire spatial and angular information on the object wavefront associated therewith; and
  • a computational entity to perform a computational reconstruction of the object wavefront from the spatial and angular information.

Other aspects of the invention relate to a method, a computer program and a product incorporating the same, adapted for the performance of the functions of the computational entity of the microscope, as well as to a module and a kit for a microscope.

The invention discloses an algorithm for computational holography and belongs to the technical field of projection. The algorithm comprises steps that S1, the object and light information is collected; S2, the object and light information is processed; S3, light field distribution on a holographic plane is expressed by computational hologram transmittance based on the encoding method; and S4, thehologram is recorded, stored and reproduced. The algorithm is advantaged in that the computational holography can be done without relying on real objects and only needs to obtain specific mathematicaldescription of object waves, so the computational hologram can be obtained through utilizing a computer and output equipment, and making and synthesizing 3D simulation book holograms can be more convenient.