64results about How to "Good polarization properties" patented technology

The invention discloses a monolithic integrated InGaAs line array or stacked array detector for a sub-wavelength micro-polarization grating. The detector is a photoelectric detector and consists of an InGaAs photosensitive chip, an anti-reflection film and the sub-wavelength micro-polarization grating, wherein the anti-reflection film is made of a low-refractive index SiO2 material, and the extinction ratio of the sub-wavelength micro-polarization grating is improved; the sub-wavelength micro-polarization grating is a polarization grating line array or array consisting of polarization units in different polarization orientations; and each polarization unit is a metal polarization grating of which the grating period is shorter than that of an incident light wavelength. The sub-wavelength micro-polarization grating is integrated on a chip of a near-infrared detector, and the invention has the main advantages that: (1) the polarization grating is monolithically integrated with the detector, an optical system is simplified, and motion parts of a polarization scanning system are eliminated; (2) high-accuracy angle quantification can be achieved, and an angle error is avoided; and (3) the polarization units in the different polarization orientations are imaged simultaneously, and accurate polarization information is acquired from a moving target.

As means of the present invention, first, on the optical element, a plate-like peripheral edge part which is protruding, while surrounding an effective part having an optical function thereof, outside from the effective part is provided. Furthermore, at a part of the through hole of the holder, a straight cylindrical part is provided. Then, an outer circumference of the peripheral edge part is tightly fitted to an inner circumferential surface of the cylindrical part of the through hole throughout the entire circumference.

The invention relates to an ytterbium doped photonic crystal fiber nonlinear polarization rotation mode-locked laser device, which belongs to the technical field of laser devices, and can directly provide laser output with high average power and high pulse energy from a laser oscillator. The laser device is mold-locked on the basis of a nonlinear polarization rotation principle, and is structurally characterized in that 976nm semiconductor laser is transmitted into an aspheric surface collimating mirror from the laser device firstly, passes by a dichroic mirror, is transmitted into a photonic crystal fiber through an aspheric surface focusing mirror, then is transmitted onto a dichroic mirror by an aspheric surface mirror in a collimated mode and reflected onto a 1/4 wave plate, passes by a narrow-band filtering plate and an optical isolator, sequentially passes by a half-wave plate and a 1/4 wave plate, finally passes by the dichroic mirror and is infiltrated into the photonic crystal fiber by the aspheric surface focusing mirror, and a resonant cavity of the laser device is formed. The laser device with the cavity has a simple structure, is easy to debug, can be used for producing laser with high average power and high pulse energy directly, and can be used for laser processing, nonlinear transformation and the like.

The invention relates to an optical sheet combination structure disposed between a polarizer and a surface emitting unit, which includes a first optical sheet having a number of columnar cubic structures of curing resin arrayed on a transparent base, a valley portion between adjacent cubic structures contacting a surface of the transparent base, and a second optical sheet disposed nearer to the side of the polarizer than the first optical sheet, having a number of columnar cubit structures arrayed on a surface, and a refractive index of the cubic structures along an extension direction thereof being different from a refractive index of the cubic structures along an array direction thereof.

The present invention provides a non-glaring material having an excellent property to cut ultraviolet rays, and having an excellent appearance and optical property as well as easy producibility and processibility, and a method for producing the non-glaring material. A non-glaring laminated body consisting of two transparent plastic material layers, a polarizing film layer which is held between the two transparent plastic material layers, and a synthetic adhesive layer which adheres the plastic material layer to the polarizing film layer, wherein at least one of the adhesive layers includes a fluorescent whitening agent and an ultraviolet ray absorber.

A polarizer includes a substrate and a fine grid which is made of a metallic material and is formed on a surface of the substrate. The substrate has a plurality of projections formed on the surface thereof which have substantially mountain shapes in sectional view and are arranged at a predetermined height and predetermined pitches. A metal layer is formed on one inclined surface of each of the mountain-shaped projections, thereby forming the fine grid. The pitch of the metal layer is set to ½ or more of the wavelength of light used, and the height of the metal layer is set to ⅕ or more of the wavelength of the light used.

The invention discloses a composite guided wave structure formed by directly efficiently coupling metal nano lines, a nano optical fiber and an optical nano line. The nano optical fiber can be directly coupled with the metal nano lines, and the surface plasma resonance signals of the metal nano lines are excitated or collected by the near-field interaction of a subwavelength dimension. The metal nano lines can also be parallel to the optical nano line firstly by micro-nano operation or the metal nano lines contact with the optical nano line at a certain angle to form coupling, and then the tapered nano optical fiber is coupled with the nano lines. The composite guided wave mode has very high coupling efficiency and simple structure, the output light of the nano lines has very good polarization property, the coupling efficiency can be controlled by regulating the overlapping length of the nano lines of a coupling area or an angle between the nano lines, the simultaneous coupling and excitation of one optical nano line to a plurality of metal nano lines can be realized, a coupler, a beam splitter, a Mach-Zehnder interferometer and an annular resonant cavity component which have a composite structure can be realized, and the composite guided wave mode can be compatible to the traditional optical fiber system.

The invention discloses a device and method for reducing a fluorescent background of a gas Raman spectrum.According to the device, a polarization modulation device conducts periodic polarization modulation on scattered light when a gas sample is analyzed; the intensity of a Raman signal of the gas sample with the good polarization characteristic periodically changes accordingly, the polarization direction of a fluorescence signal coming from the gas sample or a sample room or an optical element and the like has little correlation with the polarization direction of excitation light, and therefore the intensity of the fluorescence signal on a detector basically does not change along with rotating of the polarization modulation device; through a lock-in amplifying method, a gas Raman scattering signal can be detected in the fluorescent background.Accordingly, the influences of the fluorescent background can be reduced, and the detection capacity of the device on weak gas components can be improved; the device is simple and clear in structural layout and convenient to operate and has the very high practicability.

A quantum rod light-emitting display device according to an embodiment of the invention includes a display panel including a first substrate, a second substrate opposite to the first substrate, and a quantum rod layer formed between the first substrate and the second substrate, wherein a plurality of quantum rods are arranged in the quantum rod layer in one direction; and a polarizer disposed on the display panel and including a quarter wave plate (QWP) layer and a polyvinyl alcohol (PVA) layer, wherein the PVA layer transmits only light linearly polarized in a first direction, and wherein the QWP layer is disposed under the PVA layer, and the QWP layer circularly polarizes the light linearly polarized in the first direction or linearly polarizes light reflected by the display panel in a second direction.

The invention relates to a method for preparing a thin polymer film with polarization performance for incident light wave on a glass surface. The method for preparing the thin polymer film with polarization performance on the glass surface is characterized by comprising the following steps of: 1) synthesizing silver nanowires by a wet chemical method; 2) dispersing the silver nanowires in solution of epoxy resin to prepare polymer filming glue solution; 3) modifying a glass substrate; 4) blowing or drawing the polymer filming glue solution to form a film; and 5) adhering the thin polymer film formed by blowing or drawing on the surface of the surface-modified glass substrate and standing the glass substrate at the room temperature for curing so as to obtain a sample. Large-sized polarized filmed glass can be obtained by the method and the obtained polarized filmed glass has obvious polarization performance.

The invention is a film of a vinyl alcohol polymer that contains from 0.01 to 20 mol % of cationic group-containing units and contains from 0.5 to 24 mol % of α-olefin units having at most 4 carbon atoms. The polyvinyl alcohol film gives polarizing films and polarizer which are resistant to water and have good polarizing properties and which are free from a problem of irregular coloration.

An optical film made via melt extrusion of a noncrystalline thermoplastic resin and having a thickness of below 100 mum, a residual phase difference of up to 10 nm and an optical axis deviation within +-10 DEG , and a method for manufacture of an optical film wherein, when a nocrystalline thermoplastic resin having a glass transition temperature Tg is extruded from an extrusion die into a film and bringing the film into close contact with a chill roll, a temperature of the film before the film from the die exit is brought into close contact with the chill roll is maintained not to fall below Tg+50 DEG C.

The invention relates to a preparation technology of a thin functional polymer film, in particular to a method for preparing a thin polymer film with polarization property on the surface of glass, which is characterized by comprising the steps of: 1, synthesizing a silver nanowire by using a wet chemical method; 2, selecting the silver nanowire and absolute ethyl alcohol according to the proportion of the silver nanowire and the absolute ethyl alcohol of (20-25)mg:7mL, adding the silver nanowire into the absolute ethyl alcohol to prepare a suspension; selecting epoxy resin according to the proportion of the silver nanowire and the epoxy resin of (20-25)mg:25g, then adding the suspension into the epoxy resin, stirring for 5-10min, adding an organic amines curing agent which is 15-30 percent of the mass of the epoxy resin, stirring for 10-20min to obtain a polymer glue solution containing the silver nanowire; and 3, immersing a glass substrate into the polymer glue solution, then pulling a coating film, standing and curing at room temperature to obtain coated glass with polarization property. The method can obtain the coated glass with large size, and the prepared coated glass has remarkable polarization property.

The invention discloses a photonic crystal thin plate type surface emitting annular beam laser. An active area of the laser comprises a photonic crystal structure and phase shift defects; and a photonic crystal structural unit in the active area is a round hole or an elliptical hole, and a lattice structure is stretched in certain degree, and is added with a phase shift defect with proper width. By utilizing the invention, the surface emitting laser with good polarization characteristics and prospected beams can be designed; and because of imperfect asymmetry when the photonic crystal structural unit is the elliptical hole, the optical-field distribution is changed, and further output light has good polarization characteristics.

The invention discloses a high-efficiency probe capable of breaking through the diffraction limit and a preparation method of the high-efficiency probe. The probe comprises an optical fiber taper and a conductive nanowire fixed at the tail end of the optical fiber taper, wherein the optical fiber taper is an optical dielectric waveguide, the tail end of the optical fiber taper is gradually reduced, the conductive nanowire is a wirelike material with free electrons, and the diameter of the conductive nanowire is in a range of 50-100 nm. The preparation method of the probe comprises steps as follows: S1, the optical fiber taper and the conductive nanowire are prepared; S2, the conductive nanowire with the specific length is taken and fixed at the tail end of the optical fiber taper; preferably, the conductive nanowire adopts a silver nanowire and the diameter is smaller than 300 nm. According to the probe and the preparation method, high-efficiency conversion from an optical mode to a surface plasmon polariton mode is realized, and meanwhile, on the basis of constraint of the surface plasmon polariton to an electromagnetic field, energy is compressed to the degree at which the diffraction limit is broken through; and the efficiency of the near-field probe is greatly increased while the resolution is improved.

A polarizing element includes a plurality of first needle-shaped particles that have transmittance for first polarized light, which is in a first polarization state, that is different from transmittance for second polarized light, which is in a second polarization state different from the first polarization state, in a first wavelength region and a plurality of second needle-shaped particles that have transmittance for the first polarized light that is different from transmittance for the second polarized light, in a second wavelength region different from the first wavelength region.

The inventiondiscloses an infrared polarizer with a metal-medium-metal three-layer wire gating structure. The infrared polarizer comprises a transparent substrate, a metal wire gating layer, a dielectricwire gating layer and a metal wire gating layer from bottom to top, wherein the substrate is a medium-wave infrared bandtransparent materialsapphire, the refractive index of the dielectricwire gating layer is in a range of 1.3-4.0, a metal wire gating and a dielectricwire gating have the same cycle and duty ratio, the cycle is in a range of 300-600 mm, and the duty ratio is in a range of 0.4-0.7. In the medium-wave infrared band, when incident light is matched with impedance of the polarizer with the metal-medium-metal three-layer wire gating structure, the incident light is coupled with the wire gating to stimulate magnetic local resonance, TM wave transmittance has a peak value, meanwhile, TE wave transmittance is obviously reduced, the extinction ratio of the wire grating is increased, and the polarization property is improved. The sub-wavelength metal wire grating polarizer has the advantages of flexible design, compact structure, easiness in integration, wider spectrum and field range and the like, and has great application prospects in the aspects of micro-nano devices, integrated optics and the like.

The invention discloses a composite structure long-period fiber grating which comprises a fiber core, a fiber cladding and a fiber coating, wherein the fiber cladding coats the outside of the fiber core, the fiber coating coats the outside of the fiber cladding, and the fiber core belongs to the long-period fiber grating formed by a vertically staggered composite structure. The composite structure long-period fiber grating has a fine environmental response characteristic and a fine polarization characteristic, refractivity is vertically distributed in a staggered manner, and a fiber grating structure is enriched.

A tristable liquid crystal display device comprising: (a) first and second opposing substrates, at least one substrate carrying an alignment coating and each substrate carrying at least one electrode, thereby defining one or more pixel ; (b) a tilted smectic or induced tilted smectic liquid crystal composition placed between substrates; (c) a pair of orthogonally placed polarizers, each polarizer has a polarization axis, and a polarization axis It is aligned with the zero-field optical axis of the tilted smectic or induced tilted smectic mesophase of the liquid crystal composition; the placement of the substrate aligns the liquid crystal composition, and the composition comprises at least one hand represented by the following formula (I) Sexual liquid crystal compound: R-M-N-(P) _b - OCH ₂ C ^* HF-CH ₂ O(CH ₂ ) _a R _f , wherein M, N and P are independently selected from aromatic rings, heteroaryl rings, alicyclic rings, heteroalicyclic rings, substituted aromatic rings, substituted heteroaryl rings, substituted alicyclic rings and substituted heteroalicyclic rings, each ring is Fused or non-fused rings, the rings are connected to each other by covalent bonds or organic linking groups; R is alkyl, alkenyl, alkoxy or alkoxyalkenyl; * refers to a chiral center; a is 0 or an integer of 1; b is an integer of 0 or 1; R _f is a perfluoroether group.