Abstract: A multilayer optical retardation compensation film having at least one positive C-plate and at least one negative C-plate is used in an LCD device. The multilayer film may have a substantially flat wavelength dispersion curve, or the multilayer film combined with other layers in the LCD device may have a substantially flat wavelength dispersion curve. Polymer films for the positive C-plate may be identified according to their absorbance maxima at certain wavelength ranges.

Abstract: An optical compensation film is disclosed herein, which is made by uniaxially or biaxially stretching of a multilayer film including a first polymer film having a refractive index profile satisfying the equations of (nx+ny)/2?nz and |nx?ny|<0.005 and a second polymer film having a refractive index profile satisfying the equations of (nx+ny)/2<nz and |nx?ny|<0.005, wherein nx and ny represent in-plane refractive indices and nz the thickness-direction refractive index of the films, and wherein said optical compensation film has a positive in-plane retardation that satisfies the relations of 0.7<R450/R550<1 and 1<R650/R550<1.25, wherein R450, R550, and R650 are in-plane retardations at the light wavelengths of 450 nm, 550 nm, and 650 nm respectively.

Abstract: Provided are a high luminance polarizing plate including a polarizing plate, a ?/2 retardation film having an in-plane retardation value ranging from 250 nm to 280 nm in a wavelength range of 450 nm to 650 nm that is laminated on one side of the polarizing plate, and a brightness enhancement film laminated on the ?/2 retardation film, a method of manufacturing the same, and a display device using the high luminance polarizing plate.

Abstract: A method for polarizing an electromagnetic wave having a frequency of not less than 0.1 THz and not more than 0.8 THz using a polarizer includes steps (a) and (b). The step (a) includes preparing the polarizer. The polarizer includes: a sapphire single crystalline layer; and a CaxCoO2 crystalline layer. The CaxCoO2 crystalline layer is stacked on the sapphire single crystalline layer, a surface of the CaxCoO2 crystalline layer has a (100) plane orientation and the CaxCoO2 crystalline layer has a thickness of not less than 2 micrometers and not more than 20 micrometers. The step (b) includes irradiating the polarizer with the electromagnetic wave having a frequency of not less than 0.1 THz and not more than 0.8 THz to output an output wave having only a component parallel to a c-axis direction of the sapphire single crystalline layer.

Abstract: To reduce the crosstalk caused by the optical characteristic of the support film. A patterned retardation film comprising at least a support film (14) having optical anisotropy and a patterned retardation layer (12) disposed on the support film and having a first retardation region and a second retardation region, at least one of an in-plane slow axis direction and a retardation being different between the first and second retardation regions, wherein a variation in the in-plane slow axis direction of the support film is 3° or more.

Abstract: The present invention provides a method of displaying, in color, information accompanying rotation in a device having a rotating member, comprising disposing a first polarizing film, a printed film, a retardation film, and a second polarizing film approximately perpendicularly to the direction of the rotational axis of the rotation; with the first polarizing film, retardation film, and second polarizing film being the sequence of disposition; and with one or two films selected from among the first polarizing film, the retardation film, and the second polarizing film being caused to rotate in a manner accompanying rotation of the rotating member. The method of the present invention affords inexpensive installation, maintenance, and use; good energy efficiency; and complex color display in a greater number of colors.

Abstract: An optical film includes: a first optical phase retardation layer having a relation nx1?ny1?nz1; a second optical phase retardation layer disposed under the first optical phase retardation layer and having a relation nx2?ny2<nz2; and a third optical phase retardation layer disposed on the first optical phase retardation layer and having a relation nx3?ny3<nz3, where nzi (i=1, 2, 3) denotes a refractive coefficient in a thickness direction of the i-th optical phase retardation layer, and nxi and nyi denote refractive coefficients in two orthogonal directions in a plane substantially perpendicular to the thickness direction of the i-th optical phase retardation layer.

Abstract: An optical film includes at the least one retardation film and at least one isotropic layer made of an isotropic material, wherein the difference in average refractive index between the retardation film and the isotropic layer is at least 0.1 or more. Also, the method of adjusting wavelength dispersion characteristics of an optical film includes: stacking an isotropic layer onto a retardation film. A method for preparing optical film having a variety of wavelength dispersion characteristics by the simple method of coating the retardation film with the isotropic layer.

Abstract: An optical laminate film that comprises a layer B satisfying 1.0?Nz?3.0, 70 nm?Re(550) and 0 nm?Rth(550)?200 nm, and a layer C satisfying Re(550)?10 nm and ?200 nm?Rth(550)??50 nm, wherein the layer B and the layer C are adjacent to each other, the absolute value of the difference in SP between the main ingredient of the layer B and the main ingredient of the layer C is from 2.6 to 10.0, contribute toward improving the viewing angle characteristics of horizontal alignment mode liquid crystal display devices without causing problems of front contrast ratio reduction and display unevenness.

Abstract: A polarizing plate includes a polarizer, a protective film on an upper surface of the polarizer, a half-wavelength (?/2) retardation film on a lower surface of the polarizer, an adhesive layer on a lower surface of the half-wavelength (?/2) retardation film, and a quarter-wavelength (?/4) retardation film on a lower surface of the adhesive layer. The half-wavelength (?/2) retardation film may have a refractive index n1, the quarter-wavelength (?/4) retardation film may have a refractive index n2, and the adhesive layer may have a refractive index n in the range of n1<n<n2 or n2<n<n1. An optical display apparatus may include the polarizing plate, and further a window on a top surface of the polarizing plate, a conductor on a bottom surface of the polarizing plate, an optical display device on a bottom surface of the conductor, and a substrate on a bottom surface of the optical display device.

Abstract: A polarizing plate includes a polarizer having absorption and transmission axes, a protective film on an upper surface of the polarizer, a half-wavelength (?/2) retardation film on a lower surface of the polarizer, an adhesive layer on a lower surface of the half-wavelength (?/2) retardation film, and a quarter-wavelength (?/4) retardation film on a lower surface of the adhesive layer. An absolute orthogonal b-coordinate value based on a CIELAB color coordinate system of the polarizing plate may be approximately 3 or less when the polarizing plate is stacked with a reference polarizing plate having a degree of polarization of at least 99.9% such that an angle between the absorption axis of the polarizer and an absorption axis of a polarizer of the reference polarizing plate or an angle between the transmission axis of the polarizer and a transmission axis of the polarizer of the reference polarizing plate is 90°.

Abstract: The present invention relates to a single layer mixed cellulose ester film having a reversed optical dispersion. The mixed cellulose ester material has a DSOH from 0.35 to 1.35. By manipulating the thickness of the film, and the film stretching conditions, desirable optical retardation and optical dispersion properties can be obtained. The film can be used as an optical waveplate in liquid crystal displays to improve viewing angle, contrast ratio, and color shift.

Abstract: In relation to a sheet having linearly polarized light eliminating function that is disposed on the viewing side of a polarizing film and eliminates linearly polarized light that has traversed the polarizing plate, proposed is a novel sheet having linearly polarized light eliminating function, allowing a layer having linearly polarized light eliminating function to be thinned, and furthermore, allowing manipulability when pasting the sheet to be satisfactory. Proposed is a transparent double-sided adhesive sheet provided with a adhesive layer on both front and back sides and provided with a layer having a linearly polarized-light-eliminating function (referred to as “linearly polarized-light-eliminating functional layer”) as a middle layer, and the thickness of the linearly polarized-light-eliminating functional layer being within the range of 1 ?m to 40 ?m and smaller than the thickness of the adhesive layer on either the front or the back or the adhesive layers on both front and back sides.

Abstract: A polarizing plate includes a polarizer, a retardation film on a first side (e.g., a lower side) of the polarizer, and a protective film on a second side (e.g., an upper side) of the polarizer. The retardation film has an axis distortion angle between a fast axis of the retardation film and an absorption axis of the polarizer of about +0.03° to less than +0.2°. The protective film has an in-plane phase difference (Ro) of greater than about 10,000 nm and about 15,000 nm or less at a wavelength of 550 nm. A liquid crystal display apparatus includes the polarizing plate.

Abstract: Cellulose derivative optical retardation film with suitable birefringent characteristics to enhance wide view performance upon use in liquid crystal devices (LCD), especially in vertically aligned (VA) type LCDs. Method of manufacturing such a cellulose derivative optical retardation film and its use in a liquid crystal display or an imaging device.

Abstract: In an optical assembly having a light source which provides two optically different light components with essentially planar wavefronts on an optical axis, wherein the light components differ at least in their wavelength; in the case of an objective lens which projects the two optically different light components into a projection space; and in the case of an optical component which is arranged on the optical axis and has an plane through which the wavefronts of the two light components pass and in which at least two different areas of the optical component with different dispersion behaviors n(?) abut against one another in the lateral direction with respect to the optical axis; the optical component causes phase shifts of the wavefronts of the two light components, wherein the phase shift of the wavefronts of the one light component differs by at least one quarter of the wavelength of that light component between the two different areas, and wherein the phase shift of the wavefronts of the other light compo

Abstract: Provided are an optical filter and a stereoscopic display device. The exemplary optical filter may be applied to the stereoscopic display device to observe a stereoscopic image in a wide viewing angle without the loss of brightness.

Abstract: This patent describes an optical element, which converts incident linearly or circularly polarized visible light into radially or azimuthally polarized light beam. The polarization converter is a single optical element, produced by direct laser writing technique in an optically transparent substrate. Direct laser writing based on ultra-short pulsed laser radiation forms form birefringence self-assembled nanogratings in optically transparent material, such as fused silica. The period of gratings is smaller than wavelengths of a visible light.

Abstract: A stereoscopic image display apparatus and a driving method of the display apparatus are provided. The display apparatus includes a resolution enhancer that calculates an average brightness of first left-eye image data included in an nth (n is a natural number) line of the 3D image data and second left-eye image data included in an n+2th line of the 3D image data to obtain left-eye average data, calculates an average brightness of first right-eye image data included in an n+1th line of the 3D image data and second right-eye image data included in an n+4th line of the 3D image data to obtain right-eye average data, and converts the brightness of the left-eye average data and the right-eye average data into grayscale values.

Abstract: The problem of the present invention is to provide a phase difference film, by utilizing a cellulose ester having an acyl group substitution degree of less than 2.0 and improved compatibility, having high phase difference property despite its small film thickness and imparting high contrast and optical transmittance to a liquid crystal display device. A polarizing plate and a liquid crystal display device provided with the phase difference film are also provided. The phase difference film of the invention contains a cellulose ester which is obtained by substituting an acyl group having at least two carbon atoms for a hydroxy group in a glucose unit composing a cellulose, the film satisfies specific expressions when DS2, DS3 and DS6 are degrees of substitution of the acyl groups for the hydroxy groups at a 2C, 3C and 6C positions, respectively, of the glucose unit.

Abstract: The various embodiments include variable optical transmission devices with uniform or patterned polarizers or wave retarders configured to provide continuous or nearly continuous variations in light transmission based on linear translation. For example, embodiments include a variable transmission window including a first uniform polarizer with a first polarization axis, a second uniform polarizer with a second polarization axis, a first patterned wave retarder positioned between the first and second polarizers and including a first plurality of domains configured to vary in at least one of optic axis, thickness, or birefringence, and a second patterned wave retarder positioned between the first and second polarizers and including a second plurality of domains configured to vary in at least one of optic axis, thickness, or birefringence. The first or second wave retarder is configured to be linearly translatable relative to the other wave retarder.

Abstract: Provided is a projection image display apparatus that can restrict crosstalk between a left eye image and a right eye image. The projection image display apparatus includes a liquid crystal element that switches polarization of the light emitted from the optical modulation element between a first polarization and a second polarization, and a waveplate that is provided between the liquid crystal element and the projection surface. The waveplate includes a plurality of areas having different slow axes or fast axes from each other.

Abstract: There are provided a retardation film, a manufacturing method thereof, and a liquid crystal display device including the same. The retardation film includes 1) an acrylic film, 2) a coating layer of a negative C-type material, and 3) a primer layer including a copolymer containing an aromatic vinyl-based unit and a maleic acid-based unit, provided between the acrylic film and the coating layer of the negative C-type material. The retardation film may be used in an in-plane switching mode liquid crystal display device.

Abstract: A multilayer optical film includes a wave plate having a refractive index profile of nx>ny?nz and a fluoropolymer film comprising a moiety of wherein R1, R2, and R3 are each independently hydrogen atoms, alkyl groups, substituted alkyl groups, or halogens, wherein at least one of R1, R2, and R3 is a fluorine atom, wherein R is each independently a substituent on the styrenic ring, n is an integer from 0 to 5 representing the number of the substituents on the styrenic ring, and wherein nx and ny represent in-plane refractive indices and nz the thickness-direction refractive index of the wave plates; wherein said multilayer optical film has a positive in-plane retardation (Re) and an out-of-plane retardation (Rth) that satisfies the equation of |Rth|<Rc/2 throughout the wavelength range of 400 nm to 800 nm.

Abstract: There is provided a light-guide, compact collimating optical device, including a light-guide having a light-waves entrance surface, a light-waves exit surface and a plurality of external surfaces, a light-waves reflecting surface carried by the light-guide at one of the external surfaces, two retardation plates carried by light-guides on a portion of the external surfaces, a light-waves polarizing beamsplitter disposed at an angle to one of the light-waves entrance or exit surfaces, and a light-waves collimating component covering a portion of one of the retardation plates. A system including the optical device and a substrate, is also provided.

Abstract: A projector includes a light source, a first light separation optical system adapted to separate light emitted from the light source into first light and second light, a second light separation optical system adapted to separate the first light into third light and fourth light, separate the second light into fifth light and sixth light, and emit the third light, the fourth light, the fifth light, and the six light in directions intersecting with a plane including a light axis of the light emitted from the light source and a light axis of the first light, and a light modulation element which the third light, the fourth light, the fifth light, and the sixth light enter.

Abstract: A polymer film that has: a ratio R (VT/VM) of a sound velocity in a transverse direction VT to a sound velocity in a machine direction VM of from 1.05 to 1.50; and an in-plane retardation Re(?) and a thickness-direction retardation Rth(?) satisfying formula (I): (I) 0?Re(630)?10, and |Rth(630)|?25, wherein Re(?) represents an in-plane retardation at a wavelength of ? (nm); and Rth(?) represents a thickness-direction retardation at a wavelength of ? (nm).

Abstract: Provided is a polarizer whereby screen brightness does not become zero regardless of the direction in which a viewer faces when the polarizer is used in a liquid crystal display device capable of displaying three-dimensional images, in which three-dimensional images are visible through a polarizing filter. The polarizer comprises a polarizing film and protective films disposed on both sides of the polarizing film; at least one of the protective films being an oriented film; and the tilt of the orientation axis of the oriented film or an axis orthogonal to the orientation axis relative to the polarization axis of the polarizing film being 1° or more and less than 45°.

Abstract: The present invention is to provide a retardation film having excellent durability against temperature change or the like and a production method of the retardation film. Particularly, the present invention is to provide a retardation film which realizes both reverse wavelength dispersion and durability and a production method of the retardation film. This is achieved by a retardation film including: a component (A) which is specific cellulose acylate; and a component (B) which is cellulose acylate or cellulose ether having a molecular weight different from a molecular weight of the component (A) and whose residual degree of hydroxyl group is 0.30 or more.

Abstract: A polarization conversion mechanism for a touch screen display includes a crystal layer and a polarizing layer. The crystal layer utilizes a birefringent crystal glass for changing phase delay effect in accordance with crystal axial angle thereof. The polarizing layer includes at least one linear polarizer such that an incident light after hitting a display module of the display device reflects and emits out through the linear polarizer and the crystal layer sequentially as reflection light in form of circularly polarized light or elliptically polarized light. The assembly of the crystal layer and the layer are installed to the display device and/or touch screen display in such a manner that the assembly is located on the display module thereof.

Abstract: A reflective liquid crystal projector according to the aspect of the invention includes a light source, a reflective liquid crystal panel, and a wire grid polarization beam splitter element. The wire grid polarization beam splitter element is provided with a polarization beam split surface that reflects a first polarized light component and transmits a second polarized light component. The reflective liquid crystal projector also includes a projection optical system that projects the first polarized light component, and an aperture stop that is disposed on an optical path of the light beam emitted from the light source. The aperture stop limits the amount of first light more than that of second light. The first light is divergent from the reflective liquid crystal panel to the polarization beam split surface. The second light is divergent from the reflective liquid crystal panel to the polarization beam split surface.

Abstract: A method and apparatus for decorrelating coherent light from a light source, such as a pulsed laser, in both time and space in an effort to provide intense and uniform illumination are provided. The techniques and apparatus described herein may be incorporated into any application where intense, uniform illumination is desired, such as pulsed laser annealing, welding, ablating, and wafer stepper illuminating.

Abstract: The present invention relates to an acrylic copolymer resin containing: 1) an alkyl (meth)acrylate-based monomer; 2) a (meth)acrylate-based monomer containing an aliphatic ring and/or an aromatic ring; and 3) at least an imide-based monomer or a styrene-based monomer, to a resin composition containing said acrylic copolymer resin and a resin containing an aromatic ring and/or an aliphatic ring in the main chain thereof, to an optical film comprising said resin composition, and to a liquid crystal display device comprising said optical film. The optical film according to the present invention has excellent heat resistance, optical transparency, etc.

Abstract: Provided are a composition for an optical film comprising 40 wt % to 94 wt % of an acrylic resin; 5 wt % to 40 wt % of a styrene-acrylonitrile copolymer having a weight-average molecular weight less than 1,000,000; and 1 wt % to 20 wt % of an ultra-high molecular weight styrene-acrylonitrile copolymer having a weight-average molecular weight ranging from 1,000,000 to 9,000,000, and an optical film using the composition.

Abstract: The invention provides a reflective phase retarder and a semiconductor light-emitting device including such reflective phase retarder. The reflective phase retarder of the invention converts an incident light beam with a first type polarization into the light with a second type polarization, and reflects the converted light beam with the second type polarization out.

Abstract: Provided are a resin composition for an optical film including an alkyl(meth)acrylate unit, a benzyl(meth)acrylate unit, a (meth)acrylic acid unit, and a unit expressed by Chemical Formula I, an optical film, a polarizing plate, and an image display device using the resin composition.

Abstract: There is provided a light-guide, compact collimating optical device, including a light-guide having a light-waves entrance surface, a light-waves exit surface and a plurality of external surfaces, a light-waves reflecting surface carried by the light-guide at one of the external surfaces, two retardation plates carried by light-guides on a portion of the external surfaces, a light-waves polarizing beamsplitter disposed at an angle to one of the light-waves entrance or exit surfaces, and a light-waves collimating component covering a portion of one of the retardation plates. A system including the optical device and a substrate, is also provided.

Abstract: An optical system may include a polarization beam splitter having an input that receives multiple optical signals, a first output and a second output. The first output may provide components of the multiple optical signals having a first polarization. The second output may provide components of the multiple optical signals having a second polarization. The optical system may include a rotator having an input that receives the components to rotate the first polarization such that each of the components has the second polarization, and an output to supply components as rotated components. The optical system may also include an optical circuit including a substrate. The rotator may be separate from the substrate. The optical circuit may include an optical demultiplexer circuit provided on the substrate to receive the rotated components and the components.

Abstract: A polarization structure may include at least one adhesion layer, a phase retarder layer disposed over the adhesion layer, a polarization layer disposed over the phase retarder layer, and a light blocking member disposed over a peripheral portion of the polarization layer, under the peripheral portion of the polarization layer or under a peripheral portion of the phase retarder layer. When a display device includes the polarization structure having the light blocking member, the display device may display an image with improved visibility and uniformity in an entire display area although the display device has a minimized bezel or does not have any bezel.

Abstract: The disclosure generally relates to refractive polarization converters, polarized color combiners using the refractive polarization converters, and in particular polarized color combiners using the refractive polarization converters that can be useful in small size format projectors such as pocket projectors. The disclosed refractive polarization converters include at least one birefringent prism that can separate an unpolarized light beam into divergent polarized light beams having orthogonal polarization directions.

Abstract: The purpose of the present invention is to provide a retardation film which has high retardation developability, good mechanical strength and good durability. This retardation film contains a cellulose derivative and at least one compound represented by general formula (1), wherein each of R1 and R2 independently represents an alkyl group, a cycloalkyl group, an aryl group or a heterocyclic group; X1 represents a single bond, —NR4—, —O— or —S—; X2 represents a single bond, —NR5—, —NR5—(C?O)—, —O— or —S—; each of R4 and R5 independently represents a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl group or a heterocyclic group; R3 represents a substituent; n represents an integer of 0-4; and when n is 2 or more, a plurality of R3s may be the same or different and adjacent R3s may be joined together to form a ring).

Abstract: [Object] To provide cellulose ester films having high transmittance, and polarizing plates with less deterioration at the time when durability is tested and liquid crystal displays having high contrast, both of which comprise such cellulose ester films. [Means for Solving the Problems] Cellulose ester films comprising a cellulose ester(s) having substitution(s) by an acyl group(s) having 3 to 4 carbon atoms, or an acyl group(s) having 2 carbon atoms and an acyl group(s) having 3 to 4 carbon atoms, the cellulose ester having a total degree of substitution with the acyl group(s) of not less than 1.0 and less than 2.0 and sufficing a weight average molecular weight of not more than 150000; and a sugar ester compound(s) having not less than one and not more than 12 sugar unit structures, the sugar unit structure being at least one of a pyranose structure or furanose structure, wherein an average degree of substitution is 2.8 to 6.

Abstract: Optical film stacks are disclosed. The optical film stacks can include a first reflective polarizer, a second reflective polarizer, and a retardance layer disposed between the first reflective polarizer and the second reflective polarizer.

Abstract: An optical system capable of enhancing a specific polarization state of light beam comprises a polarization beam splitter and a polarization state converter. The polarization beam splitter separates an input light beam into a first light beam of first polarization state and a second light beam of second polarization state. The first polarization state is different from the second polarization state. The second light beam is input into the polarization state converter and converted to a third light beam having significantly much more components of first polarization state. The polarization state converter has a configuration providing total reflection or high reflection function. The configuration includes at least one anisotropic optical thin film that is disposed between an incident medium of high refractive index and a medium of low refractive index.

Abstract: Having a layer B formed of a resin “b” having a negative intrinsic birefringence value; and layers A formed of a resin “a” having a positive intrinsic birefringence value and formed on both surfaces of the layer B, wherein the resin “b” includes a styrene-based polymer, the resin “a” includes a polycarbonate, and a difference in average refractive index between the resin “b” and the resin “a” is 0.01 or more.

Abstract: Provided is a method for manufacturing a patterned retarder plate including a liquid crystal sheet on which a retarding pattern with a ?/4 wavelength by forming a patterned align layer on a photo align layer by performing an align process once. The method for manufacturing a retarder plate according to the exemplary embodiments of the present invention can implement the photoalign through a single process during the photoalign process using the mask, thereby reducing the defect rate due to the existing method and reducing the process costs.

Abstract: A first optical arrangement is configured to couple into an apparatus a first component of a light beam having a wavelength within a first spectral range; a second optical arrangement configured to couple a second component of the light beam having a wavelength within a different second spectral range; a third optical arrangement configured to expand the first component in a first dimension to create an expanded first component; a fourth optical arrangement configured to expand, in a second dimension, the expanded first component to create a further expanded first component, and to output the further expanded first component; a fifth optical arrangement configured to expand the second component in the second dimension to create an expanded second component; and a sixth optical arrangement configured to expand, in the first dimension, the expanded second component to create a further expanded second component, and to output the further expanded second component.

Abstract: The invention relates to compensation films for liquid-crystal displays with additions of rod-shaped liquid crystals mentioned below, to polarizer plates which have at least one compensation film of this type, to liquid-crystal displays which have compensation films of the said type, and to processes for the production of the said compensation films, polarizer plates and liquid-crystal displays, to the use of the compounds described in greater detail below as additions to compensation films for liquid-crystal displays, and to further subject-matters of the invention which can be seen below.

Abstract: Provided is an optical film which does not undergo the deterioration in front contrast or contrast fluctuations even when used in a VA-type liquid crystal display device having high front contrast or as a polarizing plate protection film. The optical film comprises a cellulose ester resin having high stretching adequacy and having an average acetyl group substitution degree of 2.0-2.6, has a phase difference (Ro) of 30-100 nm, a phase difference (Rth) of 70-400 nm and a film thickness of 15-50 ?m, and is characterized by fulfilling a requirement represented by formula (I). Formula (I): 0.01<S(bs)/S(T)<0.30, in the formula, S(bs) represents the quantity of backscattered light at 590 nm and 25°-85° when the angle of incident light that enters the film is set at 0°, the intensity of scattered light at 590 nm and 25°-85°; and S(T) represents the total quantity of incident light that enters the film.

Abstract: An ester-based polymer to be used in the present invention has at least a repeating unit represented with the general formula (I). A and B are substituents substituted on a stilbene group. R1 is a hydrogen atom, a linear or branched alkyl group having 1 to 10 carbon atoms, or a substituted or unsubstituted aryl group. R2 is a linear or branched alkyl group having 2 to 10 carbon atoms. R3 to R6 each independently represents a hydrogen atom, a halogen atom, a linear or branched alkyl group having 1 to 6 carbon atoms, or a substituted or unsubstituted aryl group. n is an integer of 2 or more.