121 results about "Optical medium" patented technology

The invention discloses a cable delivery detection system based on an image recognition technology. The cable delivery detection system comprises a light source, an optical medium marking module, an electromagnetic excitation module, a load module, an optical imaging module, a defect analysis module and a central processing unit. The light source is arranged along the axial direction of the cable, comprises multiple groups of sub-light sources, and irradiates the surface of the cable at a preset incident angle by adjusting light through the polaroid and the wavelength adjusting unit; the optical medium marking module is used for pasting a reflective marking layer containing a fluorescent layer and a thermochromic layer on the surface of the cable; the electromagnetic excitation module generates a high-frequency alternating electromagnetic field with a specific frequency in the cable; the load module applies a multi-axial bending load to the cable; the light imaging module collects light reflection data in a stroboscopic mode around the circumference of the cable. The defect analysis module determines cable defects according to the fluorescent layer deformation points. According to the system, multi-dimensional and high-precision detection is realized, the detection efficiency and accuracy are improved, the anti-interference capability is enhanced, and the cable delivery detection requirement is met.

The invention provides an electro-optical modulator based on a slow light effect. The electro-optical modulator comprises a substrate, a bottom electrode, an insulating layer, a slow light waveguide layer, an upper cladding and a signal electrode which are sequentially stacked from bottom to top. Wherein the slow light waveguide layer is a photonic crystal waveguide based on Z-cut film lithium niobate, the photonic crystal waveguide comprises a line defect waveguide and a plurality of air holes arranged in a triangular lattice structure, and the plurality of air holes are symmetrically arranged at two sides of the line defect waveguide. A photonic band gap is formed by a two-dimensional periodic optical medium structure formed by combining air holes arranged in a triangular lattice structure and Z-cut film lithium niobate, the slow light effect is achieved, and light waves in a specific frequency range can only be spread along a line defect waveguide by introducing the line defect waveguide. According to the invention, the interaction between the light field and the electric field is enhanced, the modulation efficiency and performance of the electro-optical modulator can be remarkably improved, and the development trend of miniaturization, integration and high speed of an existing communication network is met.

The invention relates to an absorption spectrum calibration device and a calibration method thereof, and belongs to the field of spectrum parameter measurement. The device comprises a furnace tube and light guide assemblies symmetrically arranged at the two ends of the furnace tube. The light guide assembly comprises a light guide pipe and window pieces connected with the two ends of the light guide pipe in a sealed mode, one end of the light guide pipe extends into the cavity of the furnace tube and is suspended in the middle area of the cavity, and the other end of the light guide pipe is located outside the furnace tube; and the light guide assembly is used for providing a vacuum transmission light path calibrated by the optical spectrum instrument. Through the arrangement of the furnace tube and the inner cavity of the furnace tube as the sealed cavity, the light guide assemblies symmetrically arranged at the two ends of the furnace tube, the light guide tubes in the light guide assemblies and the window sheets connected with the two ends of the light guide tubes in a sealed mode, the calibration closed environment is provided, and the space of the closed light guide tubes serves as a vacuum transmission light path; the optical path of the laser in the optical medium is replaced by the optical path in the vacuum, so that the light intensity loss is reduced, and the measurement signal-to-noise ratio is improved.

The invention relates to the technical field of free space optical communication, and discloses a wireless optical communication device which comprises a transmitting end and a receiving end. The transmitting end comprises an information source generation unit, a coding unit, a modulation unit, a driving unit, a light source unit and a transmitting optical assembly; the receiving end comprises a receiving optical assembly, a CCD camera, a signal processing unit, a demodulation unit and a decoding unit; in actual use, wireless communication is carried out through the optical medium, the communication medium is safe, and the problems of active electromagnetic silence and passive electromagnetic suppression do not need to be worried about; the coverage range of visible light is wide, the communication range is wide, and deployment is convenient; in addition, communication is carried out through the CCD camera, so that the original CCD camera can be replaced in some scenes where the CCD camera is installed, and image shooting and wireless optical communication can be realized at the same time.

The invention relates to a quaii-BIC chiral metasurface device based on refractive index modulation and a preparation method and application thereof.The chiral metasurface device comprises a plurality of sub-wavelength structure partitions which are sequentially arranged along the X axis, and every two adjacent sub-wavelength structure partitions are rotationally and symmetrically arranged relative to the Y axis; a sub-wavelength structure in the sub-wavelength structure partition comprises at least two optical dielectric layers which are stacked along the Z axis, at least one sub-wavelength structure in the sub-wavelength structure partition is obliquely arranged relative to the Y axis, and a refractive index difference exists between the at least two optical dielectric layers, so that the metasurface device realizes intrinsic chirality. The metasurface device realizes tunable strong intrinsic chirality at multiple wavelengths, and the preparation method has the advantages that the processing difficulty is low, the thickness of the optical dielectric layer is low, the thickness and the inclination angle of the optical dielectric layer do not need to be accurately controlled, the lift-off process is compatible, and high-precision large-area metasurface device preparation can be realized.

The embodiment of the invention provides an image generation unit, a head-up display device and a vehicle. Wherein the image generation unit comprises an illumination light source, a collimating lens array and a display assembly which are sequentially arranged along the light transmission direction; the illumination light source provides illumination light; the collimating lens array is used for converting the illumination light into a collimated light beam; the display assembly comprises a liquid crystal screen, a first heat dissipation optical medium layer and a second heat dissipation optical medium layer, and the first heat dissipation optical medium layer and the second heat dissipation optical medium layer are glued to the back side and the light emitting side of the liquid crystal screen respectively. The beam expanding module is used for forming beam expanding light matched with an amplification light path in the vehicle-mounted head-up display equipment; an infrared high-reflection film is arranged between the liquid crystal screen and the second heat dissipation optical medium layer and used for reflecting infrared band light so as to reduce heat input. The thermal conductivity of the first heat dissipation optical dielectric layer and the thermal conductivity of the second heat dissipation optical dielectric layer are both not lower than 2 W / mK.

A device includes a first arm, a second arm, a laser beam source, and an optical medium. The first arm is pivotably attached to the second arm and the first arm and the second arm move respective to one another. The laser beam source is configured to generate laser beam that is between 400-800 nm in wavelength. The optical medium is positioned on the second arm and configured to receive the generated laser beam and apply the generated laser beam to hair strands placed between the first arm and the second arm when the first arm and the second arm are in closed position.

A transmitter includes: an input configured to receive, via an electrical interface, encoded data from a host device, the encoded data being encoded at the host device according to a first code; processing circuitry configured to process the encoded data to provide processed data; an encoder configured to encode the processed data according to a second code that is different than the first code, where encoding the processed data includes concatenating one or more parity bits to the processed data to provide forward error correction (FEC) blocks of data; and transmit circuitry to transmit the FEC data over an optical medium.

The invention relates to the technical field of satellite protection, in particular to an anti-laser broadband efficient retroreflector for satellites, which comprises a metal substrate, a phase change alloy array, a retroreflection microstructure array and a multi-layer optical dielectric film, and is characterized in that the metal substrate is of a hollow box type structure consisting of an upper substrate, a lower substrate and side plates with grids; the phase change alloy array is arranged in the metal substrate and is composed of an Al-Si alloy phase change material; the retro-reflection microstructure array is arranged above the upper substrate, the bottom of the retro-reflection microstructure array is triangular, hexagonal or rectangular, and the top of the retro-reflection microstructure array is of a pointed cone structure composed of three inclined planes; and a plurality of layers of optical medium films are plated on the surface of the retroreflection microstructure array. The Al-Si alloy layer prepared through the substrate can absorb a large amount of heat through phase change, so that the laser damage threshold value and the protection performance are improved, and efficient retroreflection of incident laser is achieved.

The invention relates to a real-time on-line ultrafast laser dielectric film damage threshold testing system, which belongs to the technical field of ultrafast laser, and comprises a forward Brillouin compression system for generating forward Stokes light and compressing and amplifying the forward Stokes light; the forward non-focusing SRS compression system is used for generating asymmetrically amplified and compressed laser to obtain high-energy short-pulse laser; the grating film damage threshold testing system is used for bearing the optical dielectric film, receiving the processed laser, enabling the laser passing through the interior to penetrate through a damage point of the optical dielectric film, and calculating a damage threshold according to the laser power density and the light spot area; the phase interference damage judgment system is used for carrying out real-time on-line damage judgment and quantification, generating interference fringes through two beams of light, quantifying the interference fringes and detecting the damage degree of the optical element thin film on line in real time; the method has the beneficial effects that the energy irradiated on the tested grating film sample is calculated according to the beam splitting ratio, and the grating film damage threshold value is calculated.

The present invention relates to an adjustable prism (1) for variably deflecting light (L) incident on the adjustable prism (1), the adjustable prism comprising: a member (10) including a transparent and flexible first surface (11), a transparent and flexible second surface (12) facing away from the first surface, and an optical medium (2) provided between the two surfaces such that light incident on the first surface passes through the optical medium and exits the member via the second surface, whereby the light is deflected by the member depending on the angle (W) between the two surfaces; a rigid first optical element (20) including a surface region (21) connected to the first surface; a rigid second optical element (30) including a surface region (31) connected to the second surface; and an actuator system (S) configured to tilt the first optical element and / or the second optical element to adjust the angle.

Light control films have a pattern applied to it. The light control film has a plurality of spaced apart first grooves in an optical medium. Each first groove has a closed bottom. Some of the first grooves are partially filled with a light absorbing first material that absorbs light of a predetermined wavelength range of from 400 to 2000 nm. The light absorbing first material defines an unfilled void region inside the first groove extending from a bottom surface of the light absorbing first material to the closed bottom of the first groove.

A single strand of an optical fiber with a single optical core that is dimensioned at one end to resemble a blade or a head of a flat-head screwdriver. Such strand of the optical fiber is configured for optical coupling of light between such single strand and a spectrometric / spectrophotometric apparatus while employing an input slit and / or an output slit of the apparatus. A method for fabricating such single strand. A fiber optic cable containing, as an optical medium, only such single strand. A method for handling light with the use of such optical fiber and / or the optical cable.

A method includes receiving input light having an input wavelength in a first optical resonator for causing resonance of the input light in the first optical resonator. The first optical resonator includes a non-linear optical medium. The method also includes converting at least a portion of the input light to a combination of first output light having a first output wavelength that is different from the input wavelength and second output light having a second output wavelength that is different from the input wavelength and the first output wavelength by passing the input light through the non-linear optical medium. The method further includes causing resonance of the first output light and the second output light in a second optical resonator. A portion of the first optical resonator is coupled to a portion of the second optical resonator.

The application relates to the technical field of adaptive optics and intelligent material application, and discloses a liquid lens continuous zooming method and system based on programmable control, which comprises the following steps: temperature adjustment is performed on a phase change container to switch the phase change container from a glass state to a high-elasticity state; the volume of an optical medium is adjusted to drive the phase change container in the high-elasticity state to deform until the phase change container reaches a target optical appearance; temperature adjustment is performed on the phase change container to switch the phase change container from the high-elasticity state back to the glass state to lock the target optical appearance, and passive self-locking of the focal length is realized. Through the combination of the glass transition characteristics of the shape memory polymer and the precise regulation and control of the volume of the optical medium, the continuous zooming and passive self-locking of the liquid lens are realized, the problem that the traditional liquid lens needs to continuously consume electric energy to maintain the focal length is effectively solved, and the optical appearance precision and long-term stability of the lens in a complex environment are ensured.

The application discloses a transparent controlled zoom optical system with ciliary muscle induced regulation function, which is transparent and arranged on the light path between a human eye and an observation target object; the system comprises a control module for driving continuous longitudinal displacement of an optical focus; the system can be controlled to generate smooth and continuous change of diopter, so that the virtual image focus is generated to make smooth and continuous reciprocating displacement along the optical axis direction. The application does not rely on digital space modeling, directly generates continuous and smooth focus displacement on the longitudinal optical axis through controlled change of physical parameters of an optical medium, utilizes the passive and natural following characteristics of the human eye to the focus, stretches the ciliary muscle, intervenes in pseudo myopia and relieves visual fatigue.

A biological component measuring device (1) includes an optical medium (10), a high-thermal-conductivity film (30), an excitation light source (16), a probe light source (20), and a light position detector (25). The high-thermal-conductivity film (30) has a higher thermal conductivity than the optical medium (10) and is disposed on a sample placement surface (second surface (12)) of the optical medium (10). The high-thermal-conductivity film (30) diffuses heat generated from a sample (5) irradiated with excitation light (17) more in a first direction (x direction) than in a second direction (y direction). The first direction is a direction of travel of probe light (21) in a plan view of the sample placement surface. The second direction is a direction perpendicular to the first direction in the plan view of the sample placement surface.

Electro-optical arrangement, comprising: a first substrate with a first surface and a second surface opposite or opposite to the first surface, which is conductive from the first surface to the second surface; a second substrate with a third surface and a fourth surface opposite or opposite to the third surface, wherein the second and third surfaces face each other to define a gap; a first electrode that is coupled to the second surface; a second electrode coupled to the third surface; and an electro-optical medium arranged between the first electrode and the second electrode.

The invention relates to the technical field of terahertz optical devices, in particular to an integrated terahertz phase regulation and control device based on a Fresnel prism, which is used for converting linearly polarized terahertz light into circularly polarized terahertz light under the condition of not changing an original light path, and comprises an optical medium unit group and a prism bracket, the optical medium unit group is fixed in the prism support, two sides of the optical medium unit group are respectively provided with an incident window and an emergent window, and the top end of the prism support is provided with an angle adjusting mechanism. The optical medium unit group is formed by stacking and connecting a plurality of optical medium units, and each optical medium unit comprises an incident interface, a reflecting interface, an optical coupling surface and an emergent interface. By arranging different reflection interfaces, two different quarter-wave plates can be configured, and pi / 2 phase delay is output. By means of the structural design, accurate regulation and control of the phase delay amount are achieved, the device is compact in structure, the problems that a traditional device is large in size and difficult to adjust are solved, and the requirement for integration of a terahertz device is met.

This invention discloses a laser post-processing device and method for large-aperture optical dielectric thin film nodule defects, relating to the field of laser technology. The laser post-processing device for large-aperture optical dielectric thin film nodule defects includes: an ultraviolet pumped laser, a focusing lens, a femtosecond laser, a scanning galvanometer, a scanning field mirror, a centrally located aperture mirror, an observation camera, an electrically driven displacement platform, and a control computer. The laser post-processing device and method for large-aperture optical dielectric thin film nodule defects provided by this invention utilize the characteristics of small focal spot and small heat-affected zone of femtosecond lasers, and with the assistance of an optical camera, accurately remove nodule defects in localized areas in real time. Furthermore, it can automatically identify and accurately locate nodule defects, achieving rapid removal of nodule defects and reducing the impact of the post-processing process on the surrounding normal film layer. Simultaneously, it reduces manual intervention, improves the degree of automation, and effectively improves the post-processing efficiency of optical dielectric thin film nodule defects.

The invention provides a solid resonant cavity adjusting device and method for intermediate infrared femtosecond laser generation. The solid resonant cavity adjusting device comprises an induction adjusting system, a light source system, a lens system, a transition resonant cavity system, a dispersion compensation system and a collimation system. The induction adjusting system collects light beam intensity distribution. The light source system is used for generating various types of light beams. The lens system is used for focusing and adjusting the light beams. The transition resonant cavity system directs the light beam to the dispersion compensation system. The dispersion compensation system accurately compensates for dispersion effects caused by the optical medium. According to the invention, through combination of the induction plate and the transition cavity structure, efficient compensation of light beam dispersion by inserting the prism in the middle infrared band is realized, and the device has the advantages of simple operation, high detection precision and strong real-time adjustment capability. The method can be widely applied to the fields of laser beam regulation and control, precise optical measurement, laser communication, optical imaging and the like, and has remarkable advantages in the aspect of improving the precision and stability of a laser system.

To achieve probabilistic constellation shaping in a transceiver.SOLUTION: An optical communication device 100 employing a probabilistic constellation shaping circuit (PCS) 116 includes a processing circuit 104 coupled to an optical transceiver 108. With respect to the transmission function, the processing circuitry 104 generates one or more drive signals that control the optical transceiver 108 to map transmission information bits to be transmitted into transmission symbols and to generate optical transmission symbols for transmission over one or more suitable optical communication media, such as one or more optical cables, free space, etc. For the receive function, the optical transceiver receives optical transmission symbols via one or more optical media and generates received electrical signals corresponding to the received optical transmission symbols, and the processing circuitry extracts received information bits encoded in the received electrical signals.SELECTED DRAWING: Figure 1

The invention provides an application of a transparent medium with thickness compensation in a continuous tunable laser, and the cross section of the transparent medium with thickness compensation is in the shape of a right trapezoid, or the front surface of the transparent medium is a curved surface, and the rear surface of the transparent medium is a plane. According to the invention, two different transparent media with thickness compensation characteristics are applied to the external cavity semiconductor laser. Laser emitted by the laser passes through the narrow-band interference sheet, and laser output is achieved under the light feedback of the partially reflecting mirror. According to the invention, the cavity length is changed by adopting the transparent medium with the thickness compensation characteristic, the difference between the cavity mode frequency and the transmission frequency fIF is obtained, and the change of the maximum tunable range of the laser is observed.

The invention relates to a fluorescence microscopy system comprising a nonlinear optical medium (ML) and comprising: - a laser source (SL) suitable for delivering first laser pulses (IL1) having a first wavelength λ1; - a power optical modulator (MP) suitable for modulating a power of the first laser pulses (IL1) so as to form second laser pulses (IL2) having different optical powers; - said optical medium (MO) being suitable for the second pulses to propagate by undergoing self-focusing within the optical medium so as to define, for each second pulse, a focal point having a longitudinal position in the optical medium that is different from the other second pulses, laser radiation originating from the optical medium and having the second self-focused pulses, referred to as third pulses, being named the output beam (FS); - a microscope (M) suitable for: - collecting a first fluorescence radiation generated via the first wavelength λ1, by illuminating a sample (Ech) with the output beam; then - acquiring, from the first collected fluorescence radiation, at least one image of the sample for each of the third pulses illuminating the sample, each at least one image being associated with a transverse observation plane of the sample that is different from the other images.

A first circuit sends electrical data. The electrical data is sent to a vertical-cavity surface-emitting laser (VCSEL). A wavelength of the VCSEL is modulated. The modulating includes emitting, by the VCSEL, a wavelength-modulated beam (WMB). The WMB is based on the electrical data that was sent. The modulating can be based on injecting current into the VCSEL. The modulating can be based on VCSEL chirp. The WMB is coupled optically to an optical medium. The optical medium comprises a waveguide or a fiberoptic cable. The coupling optically is accomplished using a grating coupler, a mirror, or an off-axis diffractive lens. The optical medium is further coupled to a wavelength-dependent optical element (WDOE). The WDOE decodes the WMB into the electrical data that was sent. The electrical data is delivered to a second circuit.

A device includes a first arm, a second arm, a laser beam source, and an optical medium. The first arm is pivotably attached to the second arm and the first arm and the second arm move respective to one another. The laser beam source is configured to generate laser beam that is between 400-800 nm in wavelength. The optical medium is positioned on the second arm and configured to receive the generated laser beam and apply the generated laser beam to hair strands placed between the first arm and the second arm when the first arm and the second arm are in closed position.

The application relates to an integrated photonic device of III-V semiconductor on insulator and a preparation method thereof, and belongs to the technical field of semiconductors. The preparation method of the integrated photonic device of III-V semiconductor on insulator comprises the following steps: growing an epitaxial layer based on III-V semiconductor material on a first wafer, performing pattern treatment on the epitaxial layer to form a micro-nano pattern, so as to obtain a patterned optical waveguide device layer; depositing a first optical medium layer on the optical waveguide device layer as a cladding layer of the waveguide device; and bonding the first optical medium layer with a second wafer to form a heterogeneous integrated wafer. The epitaxial layer of III-V semiconductor material grown in advance is subjected to pattern treatment to form an optical waveguide device layer, and then bonding treatment is performed, so that the subsequent bonding operation can avoid affecting the pattern treatment of the epitaxial layer, and thus the yield of the optical waveguide device on the heterogeneous integrated wafer can be improved, and the integration degree of the optical waveguide device on the heterogeneous integrated wafer can be improved.

The invention relates to a method for detecting a cataract in the eye of a driver in a vehicle (1). According to the invention, the degree of a cataract is passively determined in the vehicle (1) based on a projected and reflected display content of a head-up display unit (2) and signals from a driver observation camera (3) relating to at least one eye of the driver, with respect to an idealized transmission curve of the optical media.

An electro-optical assembly includes a front substrate having a first surface and a second surface opposite the first surface. The second substrate has a third surface and a fourth surface opposite the third surface, the second surface and the third surface facing each other to define a gap. A first electrode is coupled to the second surface and a second electrode is coupled to the third surface. An electro-optic medium is in the gap. At least one of the first electrode and the second electrode is an anti-reflection electrode stack, the anti-reflective electrode stack includes a conductive layer formed of a transparent conductive oxide, a cladding layer in contact with the electro-optic medium and formed of a substantially transparent conductive material, an insulating layer between the conductive layer and the cladding layer, and a base layer between the substrate and the conductive layer. A conductive well contains the electro-optic medium and extends through the insulating layer.

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.