73 results about "Linearly polarized light" patented technology

An optical substrate and a display device are disclosed, relating to the field of display technology. The optical substrate includes multiple optical rotation regions and a first light-shielding region. The first light-shielding region is located between at least two adjacent optical rotation regions. The two adjacent optical rotation regions include a first optical rotation region and a second optical rotation region. The first optical rotation region is used to convert linearly polarized light with a predetermined polarization state in incident light into left-handed polarized light, and the second optical rotation region is used to convert linearly polarized light with a predetermined polarization state in incident light into right-handed polarized light. The optical substrate includes a substrate, and multiple touch electrodes and multiple touch traces disposed on one side of the substrate. The multiple touch electrodes are separated from each other and are not connected. Each touch electrode is connected to a touch trace in a one-to-one correspondence. The touch electrodes are used to detect the touch position of a touch object on the optical substrate. Furthermore, in the orthographic projection onto the substrate, the touch electrodes overlap with the optical rotation regions, and the touch traces are located within the range of the first light-shielding region.

The application discloses an IMU light path structure based on multiple super surfaces, and the light beam generated by a laser 1 is divided into three mutually perpendicular light beams after the action of a beam splitting super surface 3, and then is converted into circularly polarized light and linearly polarized light by a polarization conversion beam splitting super surface 4, and is used for pumping and detection of a nuclear magnetic resonance gyroscope 5 respectively. The beam splitting super surface 3 is composed of polarization-insensitive cylindrical nanorods, and the incident light is split and corresponding deflection is generated by combining the generalized Snell law. The polarization conversion beam splitting super surface 4 is composed of polarization-sensitive rectangular nanorods and polarization-insensitive cylindrical nanorods, the rectangular nanorods are used for converting linearly polarized light into circularly polarized light, and the cylindrical nanorods maintain the linear polarization characteristics and realize light beam splitting and direction adjustment. The application adopts a single laser configuration, realizes efficient light field regulation and control based on super surfaces, avoids the problem that a traditional IMU light path system depends on multiple lasers, reduces the system volume, complexity and energy consumption, improves the stability and integration, and is suitable for high-precision inertial navigation applications.

This application discloses a carbon-free laser processing system and method for metal rings. The method comprises, arranged sequentially along the optical path: a laser for emitting a first femtosecond laser beam, the first femtosecond laser beam being linearly polarized light; a beam expander for expanding the first femtosecond laser beam; a polarization control element for adjusting the polarization state distribution of the expanded first femtosecond laser beam to form a second femtosecond laser beam; a beam adjustment module for changing the transmission direction of the second femtosecond laser beam and adjusting its angle to form a third femtosecond laser beam; and a focusing module for focusing the third femtosecond laser beam to obtain a focal spot, allowing the focal spot to directly act on the metal ring for processing. This improves the processing quality, efficiency, and product quality of the metal ring, while reducing the product loss rate during processing.

Provided is a near-to-eye display device, comprising: a display panel, a light-splitting layer on a light-exit side of the display panel, an imaging lens group on the side of the light-splitting layer away from the display panel, a phase delay layer on the side of the display panel away from the light-splitting layer, a transflective layer on the side of phase delay layer away from display panel. The display panel comprises multiple display units, some of which emit first linearly-polarized light, the others emit second linearly-polarized light; first linearly-polarized light transmits through the light-splitting layer and is imaged on a first focal plane by the imaging lens group, second linearly-polarized light is reflected by the light-splitting layer and transflective layer, is subjected to polarization state transition through the phase delay layer, finally transmits through light-splitting layer and is imaged on a second focal plane by the imaging lens group.

This application provides a display device and a three-dimensional image display method. The display device includes a backlight module, a display panel, an electrically controlled phase delay device, and a time-division multiplexing control circuit. The time-division multiplexing control circuit is configured to control the display panel to alternately display left-eye parallax images and right-eye parallax images at a preset frequency, and is configured to synchronously control the electrically controlled phase delay device to switch between a first phase delay state and a second phase delay state. This causes the electrically controlled phase delay device to generate a quarter-wavelength positive phase delay in the first phase delay state and a quarter-wavelength negative phase delay in the second phase delay state, thereby converting the linearly polarized light output from the display panel into circularly polarized light with opposite rotation, achieving precise separation of the left and right eye images. The technical solution of this application reduces crosstalk between the left and right eye images and improves the resolution and clarity of the three-dimensional display.

The application belongs to a polarization Michelson wind measurement interferometer, and aims at the technical problems of resolution reduction, instrument volume and weight increase caused by internal movement components or aperture division of the existing wind imaging interferometer, and provides a polarization Michelson wind measurement interferometer based on LCVR and a measurement method thereof. Incident light is sequentially divided into transmitted light and reflected light after passing through a front telescope system, a first linear polarizer and a polarization beam splitter. The transmitted light forms first linearly polarized light by passing through a first compensation glass, a second compensation glass and a first achromatic quarter-wave plate. The reflected light forms second linearly polarized light by passing through a third compensation glass and a back surface of a second achromatic quarter-wave plate. The first linearly polarized light and the second linearly polarized light have an optical path difference and orthogonal polarization directions. The first linearly polarized light and the second linearly polarized light are sequentially imaged on a surface array CCD after passing through a first imaging lens, an aperture diaphragm, a second imaging lens, an LCVR and a second linear polarizer.

This application relates to the field of optical polarization measurement technology, specifically to a wide-spectrum, high-bandwidth static spectral modulation Stokes polarization measurement device, comprising a polarization modulation module, a spectral sampling module, and a high extinction ratio polarizer. The polarization modulation module includes a phase retarder and a linear polarizer; the spectral sampling module has sub-nanometer spectral resolution; the high extinction ratio polarizer includes a halogen tungsten lamp and a Glan Taylor prism for generating high-purity linearly polarized light; the obtained demodulation factor and the modulation spectrum acquired by the spectral sampling module are used to invert the Stokes parameters using zero-heterodyne coherent demodulation technology. This application employs a phase retarder with high birefringence, which, for the same thickness, produces an optical path difference tens of times greater than that of quartz, increasing the Stokes polarization measurement bandwidth by a factor of the response and improving the measurement accuracy of polarization spectral parameters. Simultaneously, the zero-heterodyne coherent demodulation method is used to eliminate the dispersion interference of the phase retarder through calibration.

This application discloses an illumination rotation module arranged in a structured light super-resolution illumination microscopic imaging optical system. It includes a rotatable galvanometer with two parallel and opposite mirror surfaces arranged relative to a rotation axis intersecting the principal optical axis. M mirror groups, each comprising at least three mirrors, are arranged around the galvanometer. When the galvanometer is at an angular position about the rotation axis, linearly polarized light incident on the illumination rotation module is reflected sequentially through one mirror surface of the galvanometer, each mirror in a mirror group corresponding to the angular position, and the other mirror surface of the galvanometer. This causes the propagation direction and deflection direction of the linearly polarized light to rotate synchronously before exiting the illumination rotation module. This application also discloses a structured light super-resolution illumination microscopic imaging optical system.

Vehicle light (20) for a vehicle for projecting a light image onto an image surface (24), comprising at least one light source (22), a first microlens array (26) downstream of the light source (22), a polarization grating (28) downstream of the first microlens array (26), a scanning waveplate (34) downstream of the polarization grating (28), and a second microlens array (38) downstream of the scanning waveplate (34), wherein the vehicle light (20) has a liquid crystal layer (42) arranged between the polarization grating (28) and the scanning waveplate (34), and the scanning waveplate (34) is composed of two segments, each with exactly one ≤ 1 / 4 plate, wherein the optical axes of the two ≤ 1 / 4 plates are perpendicular to each other, thereby converting circularly polarized light radiating through the scanning waveplate into linearly polarized light.

The application relates to a subwavelength vortex beam array generation method based on a metasurface and belongs to the technical field of polarization optics application. Specifically, the application relates to a two-way vortex beam metasurface design method based on phase control, which solves the problems of complex metasurface unit structure and symmetrical transmission limitation. Then, linearly polarized light is vertically irradiated on the metasurface structure in the positive and negative directions, the spatial symmetry in the electromagnetic wave propagation direction is broken, the full-range phase modulation is realized while the asymmetric transmission characteristic is obtained, the electromagnetic waves incident in the two directions can be independently controlled by changing the size parameters of the unit structure, and vortex beams carrying different topological charge numbers are respectively realized. Compared with other vortex beam generation methods, the method has the advantages of simple structure and easy integration.

The application belongs to the technical field of optical detection, and particularly relates to an optical element stress detection system and method. The optical element stress detection system based on polarization phase shift comprises a light source module, a polarization detection module and a collection and processing module arranged in sequence. The light source module is used for generating linearly polarized light and outputting a first light beam. The polarization detection module is used for modulating and processing the first light beam passing through the to-be-detected element to generate a second light beam with stress light intensity information of the to-be-detected element. The collection and processing module is used for converging the second light beam to generate a third light beam, and performing calculation and processing on the light intensity information of the collected third light beam to obtain stress information of the to-be-detected element. The application uses a novel optical element detection system to realize stress detection, which can not only avoid problems such as optical path interference and optical interference, but also improve the accuracy and stability of stress detection.

The application discloses a Brewster window stack polarization modulation device. The device comprises a Brewster window stack assembly, a clamping assembly, and an installation base. The Brewster window stack assembly comprises a plurality of optical window pieces arranged in parallel and at intervals, and the included angle between the surface normal and the incident light is a Brewster angle. The installation base has a vertical part and a horizontal part. The clamping baffle is arranged opposite to the vertical part of the installation base at intervals. The optical window pieces and the gaskets are alternately arranged in parallel at intervals. One adjusting screw is arranged on each side of the installation base. The adjusting screw passes through the clamping baffle and each gasket in sequence, and is screwed with the vertical part of the installation base. The rotation of the adjusting screw is converted into the linear motion of the clamping baffle along the support surface, so as to change the distance between the clamping baffle and the vertical part and / or realize the clamping and fixing of the Brewster window stack assembly. The device can realize linearly polarized light output with high extinction ratio and high stability in a wide range of incident angles and spectral bands.

The application discloses a kind of measurement system and method based on magneto-optical Kerr effect, belong to magnetic material measurement and imaging technical field, including three-dimensional displacement platform, optical path unit, electromagnetic unit and software control unit, three-dimensional displacement platform is in the magnetic field provided by electromagnetic unit;Optical path unit includes frame body and the laser generating device, focusing control device, differential signal measuring device and imaging device arranged in frame body interior;Linearly polarized light provided by laser generating device is focused to the sample surface fixed on three-dimensional displacement platform by focusing control device, sample surface reflects and returns focusing control device by reflected light, beam splitting obtains first reflected light and second reflected light, and the focusing control device can move up and down;Differential signal measuring device receives second reflected light to obtain electric signal, and transmit to software control unit;Imaging device receives first reflected light to realize the imaging of sample;Software control unit draws hysteresis loop according to the magnetic field intensity of the magnetic field and electric signal.

This invention relates to the field of track inspection technology, and in particular to a method and system for detecting track defects based on magneto-optical sensing. The method includes: emitting high-brightness linearly polarized light onto the train track under high-speed train operation conditions; the linearly polarized light undergoing polarization angle rotation due to the interaction between the magneto-optical sensing medium and the local magnetic field of the abnormal track section, wherein the magneto-optical sensing medium and the abnormal track section are non-contactly coupled; acquiring polarization rotation information and converting it into an observable light intensity change signal; collecting the light intensity change signal and forming a magneto-optical image; performing polarization analysis and magneto-optical anomaly reconstruction on the magneto-optical image to convert it into a magneto-optical anomaly field with spatial distribution characteristics; and determining the defects in the abnormal track section based on the magneto-optical anomaly field. This invention transforms the invisible magnetic domain anomalies induced by internal stress in the track steel into a visible magneto-optical anomaly field through magneto-optical sensing, achieving non-contact detection of surface and subsurface cracks.

This invention relates to a highly stable zero-difference differential interferometer based on inherent optical symmetry, belonging to the field of optical measurement technology. It addresses the challenge of balancing low temperature drift and ease of use in differential interferometer design. The invention comprises a frequency-stabilized laser, a differential interferometer mirror assembly, a measurement light mirror, a reference light mirror, and an interference signal calculation module. Linearly polarized light emitted by the frequency-stabilized laser is incident perpendicularly onto a polarizing beam splitter. The measurement light mirror is positioned in the output path of the second quarter-wave plate, the reference light mirror is positioned in the output path of the fifth quarter-wave plate, and the interference signal calculation module is positioned in the output path of the polarizing beam splitter next to the frequency-stabilized laser. The inherent symmetry between the reference and measurement arms in the differential interferometer structure of this invention results in theoretically zero thermal drift, good structural thermal stability, simpler optical path arrangement, and easy integration into near-high-end equipment.

Embodiments of the present application propose an imaging system based on super-Raleigh limit focusing lens and its application, which can be widely applied in the technical fields of photolithography, biomedical, optical imaging and nanometer structure precision measurement; the system can produce transverse wave vector distribution and excitation and detection vector beams with wave vector range meeting the requirements by wave vector ring modulation on incident linearly polarized light, focus the vector beams to make the focusing field meet the scale requirements, so as to obtain super-Raleigh limit excitation PSF and detection PSF, and obtain a confocal PSF capable of exciting high-order terms of spot intensity by superimposing the excitation and detection PSFs, thereby improving the imaging resolution of the system; on the other hand, the system can use solid and hollow focusing spots formed by focusing vector beams to form an image, and calculate according to the imaging result to reduce interference, so as to obtain a high-resolution detection result far exceeding the Raleigh diffraction limit, and further improve the resolution of the imaging system.

The application belongs to the technical field of optical precision measurement, automation control and artificial intelligence, and particularly relates to an interference optical path for obtaining multiple information in single exposure and application thereof, the interference optical path comprising: rotating a polarization direction of a light source through a half-wave plate to obtain first linearly polarized light; the first linearly polarized light is evenly divided into reference light and test light by a common beam splitter; the reference light passes through a quarter-wave plate back and forth to obtain second linearly polarized light orthogonal to the first linearly polarized light; the test light is decomposed into third linearly polarized light and fourth linearly polarized light by a Wollaston prism; the third linearly polarized light and the fourth linearly polarized light irradiate on a measured object, pass through the Wollaston prism again after reflection, and are combined with the second linearly polarized light at the common beam splitter; the combined light beam is received by a polarization resolution camera and records interference signals.The application can realize absolute phase reconstruction in single exposure, and is suitable for measuring refractive index distribution of dynamic or environment-sensitive samples.

The utility model discloses a kind of high-reliability single-channel polarization maintaining optical fiber rotary connectors, comprising: first optical waveguide, second optical waveguide, first collimator, second collimator, first polarization converter and second polarization converter;The polarized light output by the first optical waveguide is coupled to first polarization converter;The first polarization converter is used to convert linearly polarized light into circularly polarized light;Circularly polarized light is sent into second collimator by first collimator, and the second collimator is rotatable relative to first collimator, and the second polarization converter is connected with second collimator, and rotates together;The second polarization converter converts circularly polarized light into linearly polarized light and is coupled into second optical waveguide.The utility model can realize 360 degrees unlimited rotation, and polarization maintaining optical signal can be transmitted simultaneously, and the uninterrupted transmission of optical signal is realized.The utility model effectively reduces optical signal polarization loss, reduces optical signal echo loss in rotation process.

This application provides a focusing lens and its design method for achieving the Rayleigh limit, belonging to the field of optical component technology. The function of this focusing lens can be implemented by several devices. The principle of this focusing lens is to convert linearly polarized light into a focused vector beam with a transverse wave vector distribution and range that meet the requirements by vector beam modulation, ring beam modulation, and focusing. By using light with the required transverse wave vector components for focusing, a focused field that meets the requirements is formed, thereby achieving the Rayleigh diffraction limit. This focusing lens can be widely used in the fields of photolithography, optical super-resolution imaging, and precision measurement of nanostructures.

Described are systems and methods to eliminate reflection from a display's incident light that is captured by a camera, such as a webcam. The display includes a polarizer that polarizes light which is reflected by a medium such as glass to the camera. The reflected light includes linearly polarized light. A polarizer is strategically placed in front of the lens set of a camera. Utilizing an orientation perpendicular to the reflected incident light, reflection from the reflective surfaces is eliminated before it enters the lens set of the camera.

The utility model discloses a kind of microscopic automatic focusing device and electronic equipment based on laser spot, it is related to automatic focusing field.The microscopic automatic focusing device includes: one or more than two optical rotators, be set in objective lens group or between objective lens group and measured object, for once or multiple rotation polarization direction of all linear polarization detection light received by automatic focusing sensor, to distinguish from polarization direction of all or part objective lens group surface reflected light;First polarizer, set in the front side of automatic focusing sensor, only for eliminating all or part of the reflected light outside the linear polarization detection light.Based on the above setting, the polarization direction of linear polarization detection light is changed by optical rotator, so that it is different from the polarization direction of reflected light directly reflected from objective lens surface to automatic focusing sensor, based on this, all or part of reflected light is eliminated using first polarizer, reduce the stray light generated by internal lens of objective lens group reflection.

This application discloses a display module, comprising: a display device including multiple sub-pixels and a semi-transparent, semi-reflective layer; a dimming component disposed on one side of the light-emitting surface of the display device, including a magneto-optical modulation layer and a polarizer disposed on the side of the magneto-optical modulation layer away from the display device; the magneto-optical modulation layer includes a stacked magnetic field shielding layer, a magnetizing element, and a magneto-optical medium layer, the magnetic field shielding layer being located on the side of the magnetizing element closer to the display device; the polarizer is used to modulate incident ambient light into first linearly polarized light; the magneto-optical medium layer is used to modulate the first linearly polarized light into second linearly polarized light under the drive of the magnetizing element; the semi-transparent, semi-reflective layer is used to reflect the second linearly polarized light to the magneto-optical medium layer; the magneto-optical medium layer is used to modulate the second linearly polarized light into third linearly polarized light, the third polarization angle of the third linearly polarized light being perpendicular to the first polarization angle of the first linearly polarized light. Through the above configuration, interference from ambient light is isolated, contrast is improved, and the light transmittance of the sub-pixels is guaranteed.

An optical module, a manufacturing method thereof, and a near-eye display device. The optical module has a light incident side and a light-exiting side, and includes a first lens, a partial reflector, a phase retarder, a second lens, a reflective polarizer, and a light-transmissive structure. The reflective polarizer has a reflective axis direction and a transmissive axis direction perpendicular to each other, the light-transmissive structure has a lowest refraction direction, a refractive index of the light-transmissive structure in the lowest refraction direction for linearly polarized light parallel to the lowest refraction direction is lowest, an included angle between the lowest refraction direction and the reflective axis direction is greater than or equal to 70 degrees and less than or equal to 90 degrees, so that the reflective polarizer has a relatively large reflective polarization selectivity ratio.

To provide an image display device that is advantageous in reducing glasses ghosting that occurs when the observer is wearing glasses. [Solution] The image display device comprises an eyepiece optical system that guides light emitted from an image display element to the observer's eye, a light source for illuminating the eye, and an imaging unit for imaging the eye. The eyepiece optical system includes a lens and a first absorbing polarizer placed between the lens and the eye that transmits linearly polarized light in a first direction. The imaging unit images the eye using the light transmitted through the lens, and the light emitted from the light source and guided to the eye is linearly polarized light in a first direction.

The application discloses a kind of laser scanning detection method and system of glass surface defect, belong to optical intelligent detection technical field.This method establishes multi-angle laser scanning optical path, makes incident angle in 15° to 75° range continuously adjustable, and drives light beam to carry out two-dimensional scanning;Polarization light path system is configured, incident laser is converted into single polarization state linearly polarized light, and reflected light is divided into two ways by beam splitter at detection end, respectively for monitoring total light intensity and measuring light intensity after polarization analysis, and performing polarization state orthogonal alignment process, so that the transmission axis of polarization analysis element and the polarization direction of mirror reflection component are orthogonal;Double-mode scanning detection is executed, low-angle incidence mode is used to quickly establish overall topography profile, and high-angle incidence mode is used for fine detection of specific area.The application can effectively suppress the mirror reflection interference of high-reflectivity glass surface, avoid signal saturation, and realize high-precision and high-efficiency glass surface flatness detection.

A display device (500), an in-vehicle system, and a vehicle are disclosed. The display device (500) exhibits excellent characteristics of low color shift and uniform light emission, thereby improving the quality of the displayed image and enhancing the user experience. By incorporating two orthogonal phase compensation elements (530, 560) in the slow-axis plane and two polarization optical elements (520, 570) with the same polarization direction, the display device (500) ensures that the total phase delay of light emitted from each wavelength and polarization direction is essentially consistent. Simultaneously, light of different wavelengths can be well restored to linearly polarized light, thus achieving a low color shift light emission effect.

This invention provides a method and system for on-orbit polarization state correction of spaceborne laser signals. First, the rotation direction and pulse parameters required for switching between left- and right-hand circular polarization states are calibrated on the ground, from zero position to the default polarization state. During on-orbit operation, the motor is driven back to zero or polarity switching is performed based on the ground calibration parameters to resolve the issue of unclear rotation direction caused by command errors. To address environmental drift and accumulated errors, the characteristic of a laser corner bevel prism to reverse the rotation direction of the returning light is utilized, combined with the physical properties of orthogonally linearly polarized light from a polarization beam splitter, to fine-tune the rotating motor and monitor the energy received by the detector in real time. When the received energy reaches its peak value, it is determined to be the optimal polarization state under the current environment, achieving closed-loop circularity optimization and performance correction. This method eliminates dependence on interstellar links and effectively solves the problems of on-orbit parameter drift and multi-parameter coupling debugging of open-loop motors.

A signal quality detection method, apparatus, and optical communication system are disclosed, belonging to the field of optical communication technology. The method includes: obtaining a detection optical signal based on an optical signal transmitted in an optical fiber link; the frequency range of the detection optical signal includes multiple sub-intervals; the detection optical signal includes a first polarized optical signal, which is linearly polarized light in a first polarization direction; the frequency of the first polarized optical signal includes at least one first sub-interval, which is a sub-interval among the multiple sub-intervals; converting the detection optical signal into a frequency domain electrical signal; the frequency range of the frequency domain electrical signal includes multiple frequency intervals, which correspond one-to-one with the multiple sub-intervals; and determining the quality parameters of the detection optical signal based on the amplitude of the frequency domain electrical signal in at least two frequency intervals among the multiple frequency intervals. This method can obtain quality parameters based on a single frequency domain electrical signal, resulting in high measurement efficiency.

The application provides a kind of spatiotemporal modulation Fourier transform stokes polarization imaging spectrometer, including in turn along the direction of propagation of light beam: telescope system, polarization modulation system, converging system, polarization interference system and imaging system;Target scene emitted target light field is collimated into parallel light field in telescope system and is incident;Linearly polarized light field is obtained after collimated parallel light field is incident to polarization modulation system and is incident to converging system;Converging system is used to image linearly polarized light field to polarization interference system and produce superposition interference, form polarization interference imaging light field with specific optical path difference distribution characteristics and are incident to imaging system to obtain polarization interference image;By step scanning to target scene, obtain polarization interference image cube, by extracting each field of view corresponding interference order interference map, carry out stokes channel filtering and fourier transform, and then demodulate the spectral information of each stokes parameter of target light field.