358 results about "Incident beam" patented technology

The invention discloses a large-view-field high-resolution imaging system based on polarization regulation and control, the large-view-field high-resolution imaging system comprises a metasurface system array and a camera along the direction of a light path, and the metasurface system array comprises a plurality of pairs of metasurface systems which are distributed in an array; each pair of metasurface systems comprises a first metasurface system and a second metasurface system; the first metasurface system is used for performing high-resolution imaging and large-view-field imaging on a first polarization light beam and a second polarization light beam of an incident light beam respectively; the second metasurface system is used for performing large-view-field imaging and high-resolution imaging on the first polarization-state light beam and the second polarization-state light beam respectively; the camera is used for acquiring and fusing images formed by different metasurface systems so as to capture a high-resolution central region of interest and surrounding environment information of a wide field of view. The system can efficiently realize higher imaging quality.

The invention belongs to the technical field of radiation effect and radiation hardening of semiconductor devices and integrated circuits, and particularly relates to a single event effect laser simulation system based on Bessel beam shaping. A Bessel beam shaping and focusing module based on an axon lens is introduced and composed of the axon lens and two lenses, namely a single lens and a focusing lens, a Gaussian beam of an incident beam is shaped into a quasi-Bessel beam, and the quasi-Bessel beam is utilized to irradiate a semiconductor device to be detected. The axial distribution of the light beam is kept unchanged in a range of hundreds of microns, and the focusing breaking through the diffraction limit is realized in the radial distribution, so that the effect closer to the heavy ion charge deposition track is generated. The technology can solve the problem that a multilayer structure device, a thick sensitive region device and a wide forbidden band device are difficult to test through traditional laser simulation, and has important practical value for promoting laser simulation of the single event effect.

A beamsplitter can include a first surface with a diffractive optical element, a second surface normal to the first surface, and a beam splitting surface arranged at an angle to the second surface that is less than 45 degrees. The beamsplitter may be configured to illuminate the entire second surface in response to an input beam at the first surface.

The invention provides a femtosecond laser pulse compression device, and relates to the technical field of ultrafast lasers. The polarization state management module, the compression grating group and the tail end reflecting mirror jointly form a multi-pass folding light path; the polarization state management module is configured to guide an incident light beam with an initial polarization state to enter the multi-pass folding light path and execute one-time two-way compression; in response to the light beam which is returned after completing one-time two-way compression and has changed polarization state, guiding the light beam to the inlet of the multi-pass folded light path again so as to execute next-time two-way compression; the multi-pass folded light path and polarization state management module is configured to enable the light beam to automatically circulate for at least one time in the multi-pass folded light path based on the switching of the polarization state of the light beam; the polarization state management module is further configured to respond to the light beam which returns after completing at least one cycle and has the polarization state meeting the preset output condition, guide the light beam out of the multi-pass folding light path and output the light beam as compressed pulses.

The invention provides a multi-geometric-structure incident light path guiding device and X-ray diffraction equipment. The device comprises a reflector assembly and a movable slit assembly, the reflector assembly and the movable slit assembly are arranged on an irradiation path of an incident light beam, and a reflecting surface of the reflector assembly is arranged to reflect and adjust the received incident light beam into a focused or parallel light beam geometric structure and face the center of the goniometer; the reflector assembly is provided with a light beam channel. When the target light beam is geometrically a focused or parallel light beam, the movable slit assembly is configured to guide the incident light beam to the reflecting surface, and the reflected incident light beam reaches the center of the goniometer; when the target light beam is geometrically a divergent light beam, the movable slit assembly is configured to guide an incident light beam to pass through the light beam channel and reach the center of the goniometer. The device is simple in structure and flexible in switching, and an independent multi-stage nested translation or rotation compensation structure does not need to be additionally arranged.

The application relates to a kind of diffractive optical element beam shaping methods based on spatial frequency filtering, obtain incident light beam, based on the homogenization light beam of preset, obtain corresponding geometric analytical phase distribution;Adjust the homogenization light beam to rectangular flat-top light beam, the phase correction processing of obtained geometric analytical phase;Based on spatial frequency filtering method processing the geometric analytical phase after phase correction, get the light field regulation and control distribution requirement after processing, the light field regulation and control distribution requirement after processing has phase and amplitude regulation and control requirement simultaneously;Design diffractive optical element, make it realize the light field regulation and control distribution requirement required, and utilize the diffractive optical element to realize the incident light beam shaping as the rectangular flat-top light beam.The application can realize the light beam homogenization effect of high uniformity, edge sharp and high diffraction efficiency, and obtain wide application prospect in laser welding, photoetching and biomedical and other aspects.

A first network node may be configured to transmit a configuration of a set of resources for at least one sensing signal. Each of the set of resources is associated with at least one of an incident beam direction angle of a wireless device or a reflection beam direction angle of the wireless device. The wireless device may be configured to receive the configuration of the set of resources for the at least one sensing signal. The wireless device may be configured to transmit an indication of at least one frequency-domain compensation factor for each of the set of resources based on the configuration. The first network node may be configured to transmit the at least one sensing signal based on the configuration of the set of resources. The wireless device may be configured to receive and forward the at least one sensing signal based on the set of resources.

The invention is suitable for the technical field of diffractive optics, and provides a self-adaptive chromatography grating dispersion correction method and system based on deep learning, and the method comprises the following steps: enabling an incident light beam to be diffracted through a chromatography grating, and obtaining a multi-stage chromatography diffraction light beam; dispersion angle compensation is carried out on the multi-stage diffraction beams through the plane straight stripe blazed grating; collimating the corrected light beam by using a double-barrel lens group and forming an image space telecentric light path to obtain an image space telecentric light beam; performing spectral beam splitting and aberration pre-correction on an image space telecentric beam through a micro-lens array, and then performing image acquisition to obtain a pre-corrected multi-spectral image; and based on a deep learning algorithm, carrying out real-time fusion processing on the pre-corrected multispectral image, dynamically adjusting the deflection angle of the microlens array, and outputting a chromatic dispersion corrected tomographic microscopic image. According to the method, the axial color difference and the transverse color difference of the chromatography system can be remarkably reduced, and the method is particularly suitable for application scenes needing wide spectrum coverage and high signal-to-noise ratio.

According to the living cell observation device, the observation system and the observation method, a light beam generated by an illumination element arranged below a living cell is incident to a pyramid lens array module located above the living cell, the pyramid lens array module reflects the incident light beam at the same direction angle, and the reflected light beam is diffracted into direct light and diffracted light when passing through the living cell; the phase plate causes the direct light and the diffracted light to generate a phase difference, and the direct light and the diffracted light having the phase difference interfere with each other on the imaging element to generate a phase difference image of the living cells. The volume of the observation device is greatly reduced, especially the reduction in the height direction enables the observation device to be easily placed in an existing culture box, real-time and full-life-cycle observation of cells is realized, meanwhile, the pollution of the cells and the change of a culture environment are avoided, and the observation efficiency is improved. The advantages of a current phase difference type microscopic observation system in the aspect of image effects are reserved, and the requirements for precision and stability of a movement mechanism are lowered.

The utility model relates to a pixel. In various embodiments, the pixel includes a substrate configured to generate one or more carriers in response to an incident light beam; a first vertical gate and a second vertical gate disposed inside the substrate; a first vertical gate input electrically coupled to the first vertical gate and configured to receive a first gate control signal; and a second vertical gate input electrically coupled to the second vertical gate and configured to receive a second gate control signal. In various embodiments, the first vertical gate and the second vertical gate are configured to direct the one or more charge carriers to the first sensing node or the second sensing node using a first gate control signal and a second gate control signal.

The application provides a curved surface optical element surface defect scattering detection method and system, which comprises the following steps: setting a pre-focusing incident light beam in a detection light path, so that the incident light beam forms a virtual object point behind the curved surface optical element; adjusting the distance from the virtual object point to the vertex of the curved surface to satisfy a conjugate relationship with the distance from the detector to the vertex of the curved surface; discretizing the illuminated local curved surface region into an array of micro surface elements; calculating the projection of the unit vector of the scattered light and the unit vector of the incident light on the local tangent plane of each micro surface element to establish a local spatial frequency mapping relationship; performing surface-detector geometric modeling, micro surface BRDF calculation, radiation transmission and irradiance calculation of the scattered light field, constructing a curved surface scattering physical model and reconstructing the irradiance distribution on the detector target surface; performing total integral scattering processing on the irradiance distribution to identify defects, extracting the power spectral density of the defect region to obtain five frequency domain characteristic values, and inputting the five frequency domain characteristic values into a machine learning classifier for defect classification.

The invention belongs to the technical field of quantum optics, and discloses a double-pointer weak measurement-based complex magneto-optical Kerr angle measurement method, which comprises the following steps of: placing a sample to be measured between a weak coupling unit and a system front selection state unit or between the weak coupling unit and a system rear selection state unit, and reflecting an incident light beam from the surface of the sample; the system front selection state unit is adjusted, so that the light intensity signal acquired by the light signal acquisition unit is minimum; adjusting the pre-system selection state unit to enable the polarization state of the outgoing beam to be horizontal or vertical polarization, and adjusting the post-system selection state unit to enable the polarization state of the outgoing beam to be vertical or horizontal polarization; the external magnetic field intensity is adjusted, and meanwhile, the light spot mass center offset and the light intensity are received through the light information acquisition unit; and calculating a magneto-optical Kerr rotation angle and an ellipsometry rate. The method can be used for synchronously measuring the magneto-optical Kerr angle and the ellipsometry in one instrument state, and has extremely high sensitivity.

This application discloses a method and system for synchronous testing of metasurface grating waveguide performance, relating to the field of metasurface grating technology. The method includes polarization state modulation and spatial frequency encoding of multi-wavelength incident beams to obtain a modulated incident light field; coupling this modulated incident light field into the metasurface grating waveguide under test, which then undergoes total internal reflection to form the outgoing light field; acquiring a raw dataset of the entire light field, including Stokes polarization images and spatial spectrum images corresponding to each wavelength of the outgoing beam; calculating the total internal reflection hop count based on the Stokes polarization image; calculating the spatial step size offset based on the spatial spectrum image; and establishing a mapping relationship between the image pixel coordinates of the raw dataset and the internal physical regions of the metasurface grating waveguide under test to obtain local diffraction efficiency distribution data. This application solves the problem that traditional outgoing end intensity testing is difficult to trace to local defects inside the waveguide, achieving synchronous, high-precision quantitative characterization of local diffraction efficiency across multiple wavelengths.

The application relates to the technical field of space optical communication, and discloses a MIMO optical transmission system for a cluster unmanned aerial vehicle and a method thereof, which comprises a flight control computer, a transmitting array, a receiving array and a baseband processing unit. The baseband processing unit acquires the three-dimensional position and attitude matrix of a transceiving node, carries out coordinate system transformation, screens out candidate transmitting arrays satisfying geometric alignment conditions, reconstructs an aerodynamic wake turbulence field in combination with a motor rotating speed parameter, carries out integral of refractive index disturbance along a path to eliminate arrays blocked by air flow, drives a flight control loop to perform attitude biasing when the effective array is limited, carries out channel optimization, then splits data into spatial mapping bits and light intensity modulation bits, selects a specific array to send optical pulses, and the receiving end uses a lens to carry out spatial isolation and focusing on incident light beams, and demodulates and restores data in reverse according to the photoelectric current characteristics. The application realizes feedforward avoidance of complex air flow interference and dynamic optimization of limited channels, reduces line transmission crosstalk, and guarantees communication quality.

An apparatus (1) comprising an optical device (2) for monitoring bacterial growth of a dosed liquid biological sample. The apparatus is provided with a sample container port for receiving, in use, a sample container (6) having at least one detection chamber (20) for containing a dosed sample. The optical device (2) comprises a light source (22) configured to emit light along an incident beam axis which, in use, intersects at least one detection chamber (20) of the sample container (6) and illuminates a dosed sample contained in the detection chamber (20). The optical device (20) comprises a first photodetector (26) configured to receive light scattered by bacteria in the sample. The optical device (2) comprises a light collection arrangement (24) configured to collect light exiting the detection chamber (20) that has been positively scattered by bacteria in the sample at a scattering angle range of between about + / - 4 and + / - 20 degrees relative to the incident beam axis and direct the collected scattered light to the first photodetector (26); and prevent non-scattered light travelling parallel to the incident beam axis and exiting the detection chamber (20) from reaching the first photodetector (26). The optical device (2) comprises at least one processor configured to: measure an intensity of the scattered light received by the first photodetector (26); determine a respective representative quantity or concentration of bacteria in the sample from the intensity of the scattered light; repeat the measuring and determining steps at a series of predetermined intervals to determine changes in the representative quantity or concentration of bacteria in the sample over time; and determine a respective susceptibility of the bacteria in the sample to a respective drug.

The invention relates to the technical field of reflective optics, in particular to an off-axis three-mirror optical system with double folding mirrors, which comprises a primary mirror adopting a concave reflecting mirror and a secondary mirror adopting a convex reflecting mirror, an intermediate image is formed on an output light path of the secondary mirror, and a first folding mirror is arranged at the position of the intermediate image; the first folding mirror folds the light beam from one side of the incident light beam of the primary mirror to the other side, so that the third mirror receives the light beam; the third mirror of the concave reflecting mirror is matched with the primary mirror and the secondary mirror to correct aberration, and a final imaging light beam is generated; a second folding mirror located on an output light path of the third mirror reflects the light beam again, so that the focal plane is close to and higher than the primary mirror; the focal plane is located in an envelope space of the primary mirror and the third mirror; the diaphragm is arranged in an off-axis mode, and the off-axis amount of the diaphragm is 0.3-0.6 times of the diameter of the aperture. According to the invention, the compactness of the off-axis three-mirror optical system is improved through double-folding front and back split arrangement; through focal plane position optimization, the optimized focal plane is higher than the primary mirror.

The application provides a display panel, a display device and a display system. The display panel comprises a liquid crystal display layer, a first substrate and a stealth decorative film. The liquid crystal display layer comprises a reflection layer. The first substrate is arranged on the light-emitting side of the liquid crystal display layer. The stealth decorative film is arranged on the side of the first substrate away from the liquid crystal display layer. The stealth decorative film is used for receiving an incident light beam. The incident light beam comprises first incident light and second incident light. The first incident light is reflected via the stealth decorative film. The second incident light is transmitted to the liquid crystal display layer via the first substrate. The reflection layer reflects at least part of the second incident light. Thus, the first incident light in the incident light beam is reflected via the stealth decorative film. The liquid crystal display layer reflects at least part of the second incident light again. The reflectivity of the incident light beam of the display panel is improved. The brightness of the display panel is improved. The stealth effect of the display panel is enhanced.

The invention discloses a laser cleaning device for an online perforated drum wheel, which comprises a switchable reflecting mirror mechanism arranged on an output light path of a laser device; the cleaning focus lens is a cylindrical lens and is used for converting an incident light beam into a linear light beam, and the extending direction of the linear light beam is parallel to the space of the central axis of the rotary drum-shaped wheel; the switchable reflecting mirror mechanism comprises a reflecting mirror driven by a first driver; in the first state, the reflector outputs a light path corresponding to the perforated focusing mirror to form a first light path; in the second state, the reflector output light path corresponds to the cleaning focus lens to form a second light path. Laser of original equipment is used for online drum wheel cleaning, so that the maintenance time of personnel can be reduced, the working efficiency of the equipment is improved, and the equipment investment is also reduced; after laser automatic cleaning is adopted, only 2-3 minutes are needed for cleaning the drum wheel once, the drum wheel does not need to be detached from equipment, and the cleaning efficiency is improved by nearly 20 times.

The present application relates to the field of information optics, more particularly, to a spatial structure vertical focal field generation method and system. The present application provides a spatial structure vertical focal field generation method, according to the constructed phase map of the spatial structure vertical focal field, the incident light beam is modulated into a cylindrical wave light beam at the light beam modulation, and then the cylindrical wave light beam is focused to generate a spatial structure vertical focal field. Wherein, the phase map only needs to be calculated according to the superposition of the column lens phase or the column lens phase and the flash grid phase, and the calculation amount and calculation time are obviously reduced compared with the iterative calculation of the existing method. The present application solves the problems of large calculation amount and long time consumption of the existing method for generating a spatial structure vertical focal field.

The embodiment of the invention provides an optical modulator, a wavelength selection switch, a port-level optical switch, an optical cross connection and an optical communication system, and aims to reduce insertion loss in an optical switching process. In the optical modulator provided by the invention, an included angle is formed between a first surface of a first substrate and a second surface of a second substrate, and a liquid crystal layer is located between the first substrate and the second substrate, so that an included angle is formed between an incident light beam of a signal light beam irradiating the optical modulator and an emergent light beam emitted from the optical modulator; the first substrate is provided with a first electrode layer, the second substrate is provided with a second electrode layer, the refractive index of the liquid crystal layer is changed by adjusting the first electrode layer and the second electrode layer to generate electric fields with different intensities, the included angle between the incident light beam and the emergent light beam is further adjusted, and the signal light beam is emitted to a target output port; deflection of the signal light beams is achieved through the refraction principle, the insertion loss of the signal light beams in the optical modulator is reduced, and then the insertion loss in the optical switching process is reduced.

The present invention relates to a scanning hologram interferometer using a reference mirror. According to the present invention, provided is a scanning hologram interferometer comprising: a scan beam generation unit which modulates the phase of a first beam in a light source to convert the first beam into a first curvature beam, converts a second beam into a second curvature beam, and then interferes the first and second curvature beams to form a scan beam; a scanning unit which controls the scanning position of the scan beam in the horizontal and vertical directions and transmits the scan beam to a reflective object to scan the object by using the scan beam; a beam splitter which is disposed between the scanning unit and the object and transmits and reflects an incident beam, thereby splitting the beam; a reference mirror which is disposed on the upper side of the beam splitter and reflects an incident beam; a photodetector which is disposed on the lower side of the beam splitter and detects beams that have reflected off the object and the reference mirror and passed through the beam splitter; and an electronic processing unit which processes signals detected by the photodetector, thereby generating a hologram of the object.

The application relates to the technical field of semiconductor detection, and provides a semiconductor wafer film thickness detection method, device and system. The method comprises the following steps: in a transmitting light path, an incident light beam is transmitted to a wafer surface in a semiconductor reaction cavity; in a main receiving light path, a main channel signal reflected by the wafer surface is acquired, the main receiving light path and the transmitting light path form a confocal relationship at the wafer surface; the light signal in the main receiving light path is subjected to spatial filtering processing, the reflected light from the wafer surface is selectively passed, and the out-of-focus light scattered by aerosol in the semiconductor reaction cavity or from a liquid bead on an observation window is blocked; N auxiliary detection light paths are used to acquire corresponding N auxiliary channel signals; the relative intensity ratios of the channel signals are calculated, the optical characteristics of different interference sources are identified, the interference background is separated, and the film thickness of the wafer surface is calculated. The application is used for realizing in-situ real-time film thickness detection in a high-interference process environment such as Mist CVD.

The invention relates to the technical field of light field regulation and control, and discloses a static phase distortion compensation system of a spatial light modulator, which comprises a polarization splitting prism arranged in the light emitting direction of a laser and used for adjusting a light beam emitted by the laser into linearly polarized light in the horizontal direction, the first quarter-wave plate adjusts the linearly polarized light into circularly polarized light and irradiates the circularly polarized light to the spatial light modulator; a second quarter-wave plate arranged in the light emitting direction of the spatial light modulator adjusts an emergent light beam of the spatial light modulator into linearly polarized light, and a linear polarizer performs polarization analysis on the emergent light beam of the second quarter-wave plate; the static phase error of the spatial light modulator is determined through the polarization direction included angle of the incident beam of the first quarter-wave plate and the emergent beam of the second quarter-wave plate, and the polarization direction included angle is determined through the Malus law relation of the incident light intensity and the transmission light intensity of the linear polarizer. The static phase distortion of the spatial light modulator is compensated by using the phase error, and the static phase distortion compensation cost is reduced.

A mechanism for tracking an approximate position of a desired light beam. An optical system is configured to derive one or more first positions of one or more incident light beams from data produced by a position-sensitive device and one or more second positions of one or more incident light beams from image data produced by an image sensing arrangement. A tracking system processes the first position(s) and the second position(s) to determine or identify a position of the desired light beam.

Spectrometers are provided comprising a plurality of excitation light sources (e.g., a plurality of laser light sources), a plurality of detector elements, and / or a plurality of excitation light sources and a plurality of detector elements. In one embodiment, for example, a spectrometer includes a light source adapted to provide an excitation incident beam, a detector adapted to detect a spectroscopy signal; and an optical system adapted to direct the excitation incident beam toward a sample, receive a spectroscopy signal from the sample and provide the spectroscopy signal to the detector. The light source includes a plurality of laser sources adapted to provide a plurality of excitation incident beams through the optical system and / or the detector comprises a plurality of detector elements.

The invention discloses an optical sensor for measuring gas components of mixing equipment, and belongs to the technical field of gas component detection. Comprising a plurality of arrayed measuring units, and each measuring unit comprises a laser and a detector; the measuring unit further comprises an optical assembly, an air suction cavity, an open type cavity and a main hollow roof prism which are sequentially arranged in the direction of an incident light beam emitted by the laser, the optical assembly is connected with the air suction cavity in a sealed mode, and the air suction cavity is communicated with the open type cavity; the laser and the detector are arranged at the same end of the optical assembly. The compact layout of each structure in the measurement unit is realized, and a plurality of reciprocating light paths are formed in the gas absorption cell formed by the suction cavity and the open cavity by utilizing the reflection of the main hollow roof prism and the optical component to the incident light beam, so that the absorption optical path required by various gas detection is ensured, and the detection accuracy is improved. And the measurement requirements of mixing equipment with various sizes are met.

The application discloses a pointing deviation measuring device and method based on Hartmann sensor, which comprises: a tilting mirror for calibrating laser pointing deviation; a relay optical system for shrinking the incident light beam containing the pointing deviation and matching the diameter of the outgoing light beam with the aperture of a photodetector; a microlens array receiving the shrunk light beam and dividing the light beam into several sub-beams; a photodetector placed on the focal plane of the microlens for receiving the focused light spot image and converting the laser signal into an electric signal; a data acquisition and processing module for collecting and processing the detection signal and outputting the detection signal in a numerical form to a pointing deviation measuring and analyzing module; and the pointing deviation measuring and analyzing module for obtaining a high-precision pointing deviation measurement result of the incident light beam. According to the technical scheme, various aberrations and noise sources can be inhibited and reduced, and the pointing deviation measurement precision is significantly improved.

The application relates to the technical field of light beam scanning, in particular to a dot matrix structured light scanning method and device based on a superstructure surface, wherein the method comprises the following steps: acquiring array light beams of incident light beams during dot matrix structured light scanning based on at least one array unit in a first-order superstructure surface; generating outgoing light beams of the incident light beams based on the array light beams and a second-order superstructure surface which satisfies a certain interval condition with the first-order superstructure surface; and generating a scanning result of the dot matrix structured light scanning based on the outgoing light beams. Therefore, the problems that the long-distance detection precision is limited when a static dot matrix structured light projection is realized based on a superstructure surface and the detection field of view and detection efficiency are limited when a dynamic adjustable laser beam scanning is realized based on the superstructure surface are solved.

A beam delivery system for a probe includes a plurality of laser sources configured to generate respective incident beams, the plurality of laser sources including a first laser source that generates a first incident beam and a second laser source that generates a second incident beam. The system includes routing structures respectively positioned along a path of a respective incident beam. The optical subsystem is adapted to sequentially direct the respective output beams from the routing structure into each core in a multi-core optical fiber in communication with the probe. The first routing structure and the second routing structure each comprise an array of optical elements adapted to move synchronously such that the first incident beam and the second incident beam concurrently encounter the same member in the array.

To provide a light measuring apparatus that suppresses saturation of a photodetector.SOLUTION: A light source device 110 generates a wavelength-swept optical pulse train L1 including a plurality of optical pulses p1, p2, (omitted) having different center wavelengths. The photodetector 130 receives object light L2 obtained by irradiating a sample 2 with a wavelength-swept optical pulse train L1b. A saturation suppressor 150 is provided on an optical path of beams (L1, L1a, L1b, L2) guided within the light measuring apparatus 100, branches an incident beam into a main optical path and a sub optical path, and returns the beam to the main optical path after giving a delay to a sub-pulse on the sub optical path, thereby stretching at least one of the plurality of optical pulses p1 to pn.SELECTED DRAWING: Figure 2