440 results about "Beam splitter" patented technology

The first aspect of this invention provides a polarized illumination system for providing illumination light to biological tissue, comprising at least one laser, a lens, and a polarization-maintaining fiber. The second aspect provides a polarized imaging system for receiving light reflected or scattered by biological tissue after illumination, comprising an analyzer, an imaging lens, and a photosensitive device. The third aspect provides another polarized imaging system, comprising an imaging lens, a polarizing beam splitter, and a photosensitive device. The fourth aspect provides an endoscope system comprising the aforementioned polarized illumination system and polarized imaging system. This invention utilizes the different depolarization characteristics of scattered light at different depths to achieve separate imaging of specular reflection light, surface scattered light, and deep scattered light, greatly improving the visibility of mucosal surface and deep mucosal information, and significantly enhancing the visibility of various mucosal lesions.

The application discloses a Stokes parameter encoder, which comprises a fiber optical circulator and an optical path round trip path; a polarization maintaining fiber Faraday rotator is arranged on the optical path round trip path to rotate the polarization of light by 45 degrees; the fiber optical circulator is a polarization maintaining fiber optical circulator; the fiber optical polarization beam splitter is a polarization maintaining fiber optical polarization beam splitter; the delay fiber is a polarization maintaining delay fiber; and the fiber optical phase modulator is a polarization maintaining fiber optical phase modulator. The application further discloses a parameter encoding method of the encoder. The above technical scheme can perfectly offset the rotation angle deviation problem caused by the device, can guarantee the stability of the rotation angle regardless of the angle deviation of the device, is easy to realize the driving circuit, is easy to integrate and small in size due to the pure fiber structure, and can realize the continuous variable quantum key distribution of the complete GG02 protocol based on the Stokes encoder.

The application discloses a vortex light interference device and method for measuring three-dimensional vibration and sound field rotation characteristics, wherein a helium-neon laser emits laser light, the laser light passes through a half-wave plate and a first polarization beam splitter prism, and is divided into object light and reference light; the object light passes through a first spiral phase plate and becomes vortex object light, the vortex object light passes through a second polarization beam splitter prism, a quarter-wave plate, and a beam expander lens, and is irradiated on a test sample surface, reflected light of the sample surface passes through the beam expander lens, the quarter-wave plate, the second polarization beam splitter prism, a beam splitter prism and a focusing lens, and is irradiated on a photodetector; the reference light passes through an acousto-optic modulator to generate frequency modulation, passes through a mirror and a second spiral phase plate to become frequency-modulated vortex light, and the vortex light passes through a beam splitter prism and a focusing lens and is irradiated on the photodetector; a computer calculates and demodulates frequency-modulated signals of the photodetector and modulation signals of the acousto-optic modulator, and finally obtains three-dimensional vibration information and sound field rotation characteristics of the sample.

The application discloses a kind of superfast laser processing system and method that can steplessly regulate the inclination of micro slot side wall, including laser, laser exit beam is divided into two beams after beam splitter, wherein beam 1 is parallel to Y axis, beam 2 is parallel to X axis;Beam is reflected after first mirror and exits parallel to Y axis;Two beams are vertically incident into double-beam adjustable tilt moving device, and after regulating light beam, respectively through second mirror, third mirror and through first convex lens, second convex lens, it converges in a certain angle and a certain interval on the surface of workpiece to be processed, and the workpiece to be processed is clamped on three-dimensional motion platform, and the focal point of two intersecting converging beams is relatively moved with workpiece to be processed, to realize the laser etching processing of surface micro slot;The application can regulate the inclination of two sides respectively to realize the efficient controllable processing of rectangular micro channel, other side wall inclination micro channel and even negative inclination micro channel.

This invention relates to the field of precision alignment technology, specifically to an astigmatic differential confocal alignment system and method capable of synchronous imaging. The astigmatic differential confocal alignment system includes: an astigmatic differential confocal optical path system and an imaging optical path system sharing the same objective lens; the astigmatic differential confocal optical path system includes a laser, a collimating and expanding beam system, a polarizing beam splitter cube, a quarter-wave plate, a long-pass filter, a short-pass dichroic mirror, an objective lens, a non-polarizing beam splitter cube, a plano-convex cylindrical lens, and two four-quadrant photodetectors connected in sequence; the imaging optical path system includes a visible light point source, a beam splitter, a short-pass dichroic mirror, an objective lens, a sleeve lens, and a camera connected in sequence; the two optical path systems are coaxial and synchronized. When the defocus error signal FES crosses zero, the camera synchronously acquires a clear morphological image of the surface of the sample under test, achieving synchronization of alignment and imaging.

This invention discloses a coaxial telecentric polarization hyperspectral imaging device and a biological tissue detection system. The device includes: a light source emitting unpolarized light; a circular polarization generator converting the unpolarized light emitted by the light source into circularly polarized light; the circularly polarized light being coupled into a coaxial telecentric lens via a coaxial optical interface; the coaxial telecentric lens reflecting the circularly polarized light, which then illuminates the target object plane; the signal reflected from the target object re-enters the coaxial telecentric lens and is transmitted to a polarization analyzer module via a beam splitter. The polarization analyzer module includes a first waveplate and a first linear polarizer. The first waveplate receives the signal transmitted from the beam splitter and transmits the signal to the first linear polarizer. The first linear polarizer sends the output light to a hyperspectral camera, and the hyperspectral camera sends the output image to a computer for image analysis.

This application discloses a deformation screening device and method for industrial containers. The deformation screening device includes: a projection unit, arranged along a first optical axis, for projecting a preset structured optical pattern; a beam splitter, tilted at 45° relative to the first optical axis, capable of reflecting part of the light beam incident upon it and transmitting the other part, so that the structured optical pattern incident upon the beam splitter is reflected along a second optical axis perpendicular to the first optical axis to the industrial container under test; an imaging unit, arranged along a third optical axis collinear with but opposite to the second optical axis, for receiving a distortion detection image returned from the surface of the industrial container under test; and a processing unit configured to determine whether the industrial container under test has deformation defects by comparing the distortion detection image and a distortion reference image. Applying this application eliminates the need for a complex and time-consuming 3D reconstruction process to screen for deformation defects in industrial containers, making it suitable for high-speed online inspection scenarios.

The application relates to a polarization holographic multiplexing display system and method based on an acousto-optic modulator, wherein a beam splitter is arranged in front of a spatial light modulator; a laser, a first linear polarizer and the beam splitter are sequentially arranged on an optical path of the laser; a first lens, a pinhole, a second lens and a first polarization grating are sequentially arranged on a reflection optical path of the beam splitter; four circularly polarized lights are arranged behind the first polarization grating; a reflecting mirror, an acousto-optic modulator, a third lens and an image sensor are sequentially arranged on an optical path of a first light beam; a second polarization grating, a second linear polarizer and an image sensor are sequentially arranged on optical paths of a second light beam, a third light beam and a fourth light beam. The application can obtain three kinds of reconstructed images with different effects at different reconstruction distances, and has a good application prospect in the fields of holographic display, holographic storage and the like.

This invention discloses an integrated detection device for the isolation degree of an optical isolator, belonging to the field of optical component manufacturing technology. The device includes a top connecting plate, a supporting vertical plate fixedly connected to the back of a bottom supporting plate, a top connecting plate fixedly connected to the front of the upper end of the supporting vertical plate, and a connecting pipe arranged opposite to each other detachably between the top connecting plate and the bottom supporting plate. An adjustment component is installed on the two connecting pipes below the depolarizing beam splitter prism, and an isolator is installed on the adjustment component. The isolator and the reflector are coaxial. Through the principle of dual-source independent optical path synchronous acquisition, the two light sources are transmitted through the depolarizing beam splitter prism to form a test optical path and a reference compensation optical path, respectively, and the reverse leakage power of the isolator is acquired synchronously. This avoids the light source drift and optical path loss drift errors caused by time difference in traditional single-path step measurement.

This invention provides a near-infrared therapy device for improving Alzheimer's disease, characterized by comprising: a frequency-modulated drive circuit 1, a near-infrared LD light source 2, an optical fiber coupler 3, a light source power monitoring photodetector (PD) 4, an optical power monitoring circuit 5, an optical fiber beam splitter 6, an MPO optical fiber cable 7, and an optical transmitter 8. The optical transmitter includes an optical transmitter housing 8-1, a fiber-end hemispherical emitting microlens 8-2, and a beam-shaping coupling lens 8-3. This invention can be used to regulate the metabolism and cellular function of meningeal lymphatic endothelial mitochondrial cells, promote meningeal lymphatic transport in the central nervous system, thereby alleviating the pathological symptoms of Alzheimer's patients and enhancing their cognitive function. The device has a simple and compact structure, is easy to plug and unplug, has low optical signal loss, and high coupling efficiency. It can be widely used in novel non-invasive optical brain-computer interface devices and belongs to the field of fiber optic sensing technology.

The application discloses a frequency modulation rate variable laser linear frequency modulation device and a frequency modulation method thereof. The device comprises a wideband tunable laser, a micro-optical lens, a beam splitter, an adjustable optical delay unbalanced MZ interferometer, a balanced photodetector, a phase discriminator, a loop filter, an up / down switch control circuit and an integrator. The adjustable optical delay unbalanced MZ interferometer comprises two couplers and an adjustable optical fiber delay line unit. According to the relationship between the linear frequency modulation light frequency and time of the upper and lower arms of the interferometer, when the delay amount of the adjustable optical fiber delay line unit changes, the frequency modulation rate of the output laser can be changed. The application changes the time delay of the light by using the adjustable optical fiber delay line, so that the frequency modulation rate can be changed.

The application discloses a laser converging system, a laser welding system and a laser welding machine, and relates to the technical field of optical converging. The laser converging system converts the preset S polarization laser beams sent by a laser device into two S polarization beams, and then into two P polarization beams through a plane mirror, an S polarization beam splitter, a first controlled mirror and a second controlled mirror arranged in the same XY plane, and converges the first light path and the second light path corresponding to the two P polarization beams at a preset space point outside the XY plane, so that the imaging light path for observing the converging conditions of the P polarization beams is designed outside the XY plane where the laser transmission light path is located, the mutual interference between the laser transmission light path and the imaging light path is avoided, and the control precision of the laser convergence is improved.

The present application relates to steel wire rope state detection technical field, especially in kind based on event compensation correction steel wire rope diameter measurement method and system, its technical scheme includes imaging module, boundary initial extraction module, dynamic motion estimation module, dynamic correction compensation module and diameter calculation module, the imaging module includes traditional camera, event camera, optical component, synchronous trigger device and beam splitter, the traditional camera is used for collecting the frame image of steel wire rope, the present application relies on the complementary advantages of event camera and traditional camera, through event driven dynamic geometric compensation model, the systematic measurement deviation under dynamic working condition is solved from the mechanism, the breakthrough of quasi-static imaging dependence is broken through, without additional constraint or frame rate promotion, control cost and hardware complexity, avoid signal-to-noise ratio decline and other problems, realize high-precision stable measurement under high speed, vibration working condition, adapt to multi-industrial scene online monitoring, practicality and application value are remarkable.

This invention relates to a real-time monitoring device for yarn vibration characteristics based on laser imaging, comprising: a laser for emitting laser light to form a laser beam; a first polarizing beam splitter for orthogonally decomposing the laser beam into a measurement beam and a reference beam according to the polarization state of the laser; a measurement imaging optical path for measuring the yarn under test using the measurement beam and reflecting the measurement beam passing through the area where the yarn under test is located through a reflector to form an echo beam carrying the characteristic information of the yarn under test; a reference illumination optical path for constructing a uniform and stable background illumination reference beam; a beam splitter for combining the echo beam and the background illumination reference beam to obtain a combined beam; an area array camera for acquiring the combined beam; and an image processing system connected to the area array camera for performing image processing on the acquired combined beam to obtain the vibration characteristics of the yarn. This invention can accurately capture and quantify the vertical vibration characteristics of the yarn.

The invention describes a sphere measuring device (10) for optically determining at least one shape parameter (F) of an at least partially reflective sphere (12), wherein the sphere measuring device (10) comprises: a light source (14) for emitting coherent light (16) with a first central wavelength (λ1), a beam splitter (22) arranged to generate measuring light (16.M1) and reference light (16.R1), a measuring arm mirror (24) arranged to reflect at least a portion of the measuring light (16.M1) onto at least a portion of the sphere (12), and a reference arm mirror (30) configured to reflect at least a portion of the reference light (16.R1), wherein the sphere measuring device (10) is configured to superimpose at least a portion of the light (16.R2) reflected by the reference arm mirror (30) with at least a portion of the light reflected by the measuring arm mirror (24). (16.M2) in an interference area (34) such that interference occurs, a detector (40) which is arranged to detect at least one measurement brightness value (I. n ) in at least part of the interference range (34) and is designed such that, based on the measured brightness value (I n ) the at least one shape parameter (F) of the sphere (12) is determinable, wherein the measuring arm mirror (24) has a concave rotational ellipsoid section (26) which is designed such that the sphere (12) can be placed within the rotational ellipsoid section (26) with its center point (M) in a first focal point (B1) of the rotational ellipsoid section (26), namely in a measuring position, and the light source (14) is designed such that a light source point (20) of the light source (14) is located in the second focal point (B2).

A camera apparatus according to an embodiment of the present invention comprises: an optical output unit which generates and emits an output light signal to an object; an optical input unit which receives an input light signal input after being reflected from the object; and a depth information generation unit which generates depth information of the object using the input light signal input to the optical input unit. The optical output unit comprises: a light source which generates the output light signal; and a beam splitter which splits the output light signal generated by the light source into a first polarization component and a second polarization component that are different from each other, wherein the first polarization component and the second polarization component are emitted to be distinguished from each other on the object.

A partial beam splitter includes a substrate including a substrate material; and a coating arranged on at least one main surface of the substrate. Along a first direction which is parallel to a normal vector of the main surface, the substrate and all coatings having a total thickness. For a specific light beam having a specific wavelength within a range of 450 nm and 650 nm which is incident on the partial beam splitter along a second direction with an angle of 32° enclosed between a vector pointing in the first direction and a vector pointing in the second direction, the specific light beam after transmitting through the partial beam splitter has a phase having a phase difference of an absolute value of smaller than or equal to 30° compared to the case in which, under otherwise identical conditions, the partial beam splitter is replaced by a similar reference substrate.

The application discloses an engine rotor multi-parameter measurement system and method, and the system comprises a first optical comb, a second optical comb, a polarization maintaining optical fiber amplifier, a polarization maintaining optical fiber beam splitter, an integrated polarization maintaining optical fiber ring, an integrated polarization maintaining optical fiber beam combiner, a plurality of high-temperature-resistant optical fiber probes, a high-speed photoelectric detector and a data acquisition and processing system; the pulse repetition frequency of the first optical comb is greater than that of the second optical comb, and the two have a high repetition frequency difference; the plurality of high-temperature-resistant optical fiber probes respectively generate reference light pulses and measurement light pulses; the scanning light pulses emitted by the second optical comb respectively interfere with the plurality of reference light pulses and the plurality of measurement light pulses to generate double-comb interference reference signals and double-comb interference measurement signals; through processing of the reference signals and the measurement signals of each channel, the engine rotor speed, the blade tip clearance, the blade tip timing and the blade vibration parameters are obtained. The application has the advantages of high measurement speed, high measurement accuracy and multi-parameter synchronous measurement.

This invention discloses a method and system for identifying the radial movement of dynamic targets based on Doppler differential imaging. The method includes: a laser source irradiates a target object and is scattered; the backscattered light signal is received by a receiving system; a beam splitter divides the backscattered light signal into a reference path and a detection path; the reference path signal is received by a reference path array photoelectric detection sensor to obtain the reference path light intensity; a gas cavity is added to the detection path, and the detection path signal is absorbed by the gas cavity and then received by the detection path array photoelectric detection sensor to obtain the detection path light intensity; the pixel positions of the detection path and reference path sensors are aligned; the ratio of the detection path light intensity to the reference path light intensity is calculated; the state of the target object is determined based on whether the calculated value changes; and the target velocity is imaged within the field of view. This invention, by using a gas cavity, can accurately identify the radial velocity of dynamic targets, solving the problem of poor performance of traditional imaging detection techniques for dynamic targets.

This invention relates to an integrated microwave-laser radar composite detection system, belonging to the field of microwave-laser composite detection technology, and solves the problems of insufficient detection accuracy, poor system integration, and weak adaptability in existing technologies. The system includes: a microwave radar module, which receives a first and second laser beam emitted from a beam splitter, modulates the first laser beam using a radio frequency signal to generate a microwave radar transmission signal, and transmits it to the target; a single-photon laser radar module, which receives a third laser beam emitted from the beam splitter, generates a single-photon laser pulse based on the third laser beam, and transmits it; a coherent laser radar module, which receives a fourth and fifth laser beam after beam splitting, generates a laser transmission signal based on the fourth laser beam, and transmits it; and a control and acquisition processing module, used to receive the intermediate frequency echo signal from the microwave radar module, the electrical signal from the single-photon laser radar module, and the coherent intermediate frequency signal from the coherent laser radar module, process them to generate characteristic parameters of the target.

This invention relates to the field of optical thin film fabrication technology, specifically to a method for fabricating a high extinction ratio, adhesive-free polarizing beam splitter film resistant to high and low temperature environments. The method includes the following steps: S1, substrate pretreatment; S2, polarizing beam splitter film deposition; S3, adhesive-free bonding treatment; S4, annealing strengthening; and S5, post-treatment. This invention uses an adhesive-free optical contact bonding process to replace the traditional organic bonding process, completely eliminating the temperature adaptability bottleneck caused by organic adhesive layers. The bonding interface relies on intermolecular forces for adhesion, eliminating problems such as aging and debonding of organic adhesives. This allows the device to operate stably in a wide temperature range of -60℃ to 120℃, greatly improving the device's environmental adaptability and meeting the needs of extreme environments such as deep space exploration and polar observation.

This invention relates to the field of cloud tracking technology, specifically to a cloud tracking visual recognition photovoltaic power monitoring device, comprising an all-sky imager, a protective component, a blocking component, and a cooling component on the outer side of the all-sky imager; the protective component includes a protective shell, and a fixing ring is provided inside the protective shell, with a gear ring rotatably embedded inside the fixing ring, and a protective lens fixedly connected to the outer surface of the gear ring, the protective lens being a spherical fisheye composite beam splitter; the purpose of this invention is to solve the problem that existing all-sky imagers, during long-term outdoor operation, have their core imaging lenses directly exposed to complex external environments, lacking a stable and long-lasting physical isolation protection system, and the lens surface is easily contaminated with various pollutants such as sand, salt spray, bird droppings, and insect carcasses.

The application relates to a ZYNQ-based fiber grating demodulation device and a gigabit Ethernet data transmission method thereof, and relates to the fields of optical fiber communication and sensing. The device takes a ZYNQ control module as a core, and is matched with a laser driver board, a laser, a beam splitter, an FBG sensor, a filter, a balanced photoelectric detector, a signal amplification module and an AD conversion module. The process is as follows: a terminal writes a filter characteristic curve into a PL end BRAM; the ZYNQ drives a laser, and the generated optical signal is reflected to the balanced photoelectric detector after passing through the beam splitter and the FBG sensor, is input into the PL end after photoelectric conversion, amplification and AD conversion; the PL end calculates and looks up a table to obtain a center wavelength; data is stored in a DDR3 through AXI and FIFO, and is uploaded to the terminal through a network port. Compared with a traditional MCU scheme, the application has the characteristics of fast operation speed, high integration degree and low transmission delay, and can be widely used in the fields of optical fiber communication and sensing measurement.

The application provides a 2*2 beam splitter based on an error compensation structure, an interference unit, an imaging system and a method, the 2*2 beam splitter comprising: a first coupler, a second coupler, a first phase shifter and a second phase shifter; wherein the first phase shifter is connected on an optical path between the first coupler and the second coupler, and the second phase shifter is connected at an input port of the first coupler; the first phase shifter is configured to compensate for a phase deviation of the first coupler caused by a process error by adjusting a phase value of the first phase shifter; and the second phase shifter is configured to compensate for a phase deviation of the second coupler caused by a process error by adjusting a phase value of the second phase shifter. The application solves the problem that a traditional multi-mode interference coupler causes a misalignment of a light splitting ratio due to a process error, and further causes a decline in imaging resolution.

The application provides a neurovascular coupling imaging system, method, device and storage medium, which comprises an image collector, a microscope frame arranged in the light inlet direction of the image collector, a visible light system for emitting visible light to a sample to be collected after the visible light is reflected by a beam splitter in the microscope frame, a near-infrared light system for emitting near-infrared light to the sample to be collected after the near-infrared light is reflected by another beam splitter in the microscope frame, and a trigger device for switching the frequency of the time-sharing emission of each light source in the visible light system and the near-infrared light system based on the collection frequency of the image collector. The application can integrate different visible light or near-infrared laser light sources in the light path to be collected, is compatible with various imaging requirements such as visible light for imaging of nerve cell activity and near-infrared light speckle imaging for non-invasive blood flow imaging, ensures that there is no time difference between image collection and light source switching and no time resolution is lost, and facilitates subsequent storage and calculation of data.

The application relates to a field-induced modulation heterogeneous integrated photon display chip and a manufacturing method thereof, and a laser display system. The field-induced modulation heterogeneous integrated photon display chip comprises a first substrate, a monochromatic laser located on one side of the first substrate, a waveguide layer, a first modulator and a second modulator. The monochromatic laser is used for outputting light. The waveguide layer is located on the side of the monochromatic laser close to the first substrate and comprises a grating coupler, a beam splitter, an interferometer and an optical waveguide structure arranged in sequence along a first direction. The first modulator is used for performing primary frequency modulation on the light output by the monochromatic laser, and the first modulator is located on the side of the waveguide layer away from the first substrate. The second modulator is used for performing secondary frequency modulation on the light, and the second modulator is located on the side of the optical waveguide structure away from the first substrate. The application improves the color regulation and control capability of the field-induced modulation heterogeneous integrated photon display chip, optimizes the performance of the chip and reduces the size of the chip.