Abstract: A polarizing beam splitter (PBS) 14 includes a first prism 31, a second prism 32, a polarizing split film 29, an antireflection film 33, and an adhesive 34. The first and second prisms 31 and 32 are made of transparent materials and are cemented to each other by the adhesive having a refractive index less than those of the first and second prisms 31 and 32. The polarizing split film 29 is formed on a surface of the first prism 31. The antireflection film 33 is provided on one surface of the second prism 32 to which the first prism 31 is cemented. The antireflection film 33 has a refractive index distribution in which a refractive index decreases from the second prism 32 side to the adhesive 34 side and prevents reflection of light between the second prism 32 and the adhesive 34.

Abstract: The present invention provides an anti-reflection film which not only has a sufficient anti-reflection properties and sufficient antistatic properties but also reduces color in reflection light, inhibits color unevenness and provides a display device with excellent contrast in a bright place and excellent contrast in a dark place when applied on a display device. The anti-reflection film of the present invention has average luminous reflectance in the range of 0.5-1.5% on a low refractive index layer surface, a difference in the range of 0.2-0.9% between the maximum and the minimum in spectral reflectance on the low refractive index layer surface in a wavelength region of 400-700 nm, absorption loss in average luminous transmittance in the range of 0.5-3.0%, and parallel light transmittance in the range of 94.0-96.5%.

Abstract: An optical article includes a plurality of light transmissive members and a plurality of optical functional films, wherein the plurality of light transmissive members are disposed to face one another; the optical functional film is disposed such that the optical functional film is sandwiched between the light transmissive members; a bonding layer that bonds a surface of the optical functional film to a surface of the light transmissive member is provided; the optical functional film is a multilayer film in which a plurality of low refractive index layers and a plurality of high refractive index layers are alternately arranged and a layer in contact with the side of the bonding layer is a high refractive index layer; and the bonding layer is a plasma-polymerized film having the same refractive index as that of the low refractive index layer.

Abstract: In a composition layering one layer on a transparent substrate, the present invention provides an optical film which can balance anti-glare function, high contrast, color reproducibility, and anti-glittering enough. The optical film in the present invention comprises a transparent substrate, and a resin layer layered on the transparent substrate, the resin layer including transparent resin fine particles and a radiation-curable resin composition, and having a fine rugged structure of an average inclination angle in a range of 0.8° to 3.0° on the top surface of the resin layer; a haze value which is in a range of 40% to 60%; and a transmitted image clarity which is measured by using an optical comb having width of 0.5 mm and is in a range of 5% to 35%.

Abstract: An antireflective film includes: a transparent substrate film; and at least one low refractive index layer, the low refractive index layer is formed with a composition containing: a fluorine-containing antifouling agent having a weight average molecular weight of less than 10,000 and a structure represented by the following formula (F); a polyfunctional monomer having a polymerizable unsaturated group; and (C) an inorganic particle, and a content of the fluorine-containing antifouling agent is 1% by weight or more and less than 25% by weight based on a total solid content of the coating composition: (Rf)-[(W)-(RA)n]m??Formula (F) wherein, Rf represents a (per)fluoroalkyl group or a (per)fluoropolyether group, W represents a connecting group, RA represents a functional group having a polymerizable unsaturated group, n represents an integer of from 1 to 3, and m represents an integer of from 1 to 3.

Abstract: Plasmon-enable devices such as ultra-small resonant devices produce electromagnetic radiation at frequencies in excess of microwave frequencies when induced to resonate by a passing electron beam. The resonant devices are surrounded by one or more depressed anodes to recover energy from the passing electron beam as/after the beam couples its energy into the ultra-small resonant devices.

Abstract: An antireflection film includes a multilayer film having six layers, in total, provided between an optical substrate and an adhesion layer. The respective layers of first to sixth layers are laminated in order from one side of the adhesion layer. A refractive index of the antireflection film as a whole is lower than that of the optical substrate and higher than that of the adhesion layer. The first and third layers are low refractive index layers having a refractive index of 1.35 to 1.50 at d line. The second, fourth and sixth layers are middle refractive index layers having a refractive index of 1.55 to 1.85 at the d line. The fifth layer is a high refractive index layer having a refractive index, at the d line, that is in a range of 1.70 to 2.50 and that is higher than that of the middle refractive index layer.

Abstract: A flexible material for optical applications in a wavelength range of ?1 to ?2, ?1 being smaller than ?2, composed of a flexible support and at least one multilayer that comprises a porous or nanoporous layer which has a low refractive index and contains inorganic nanoparticles and at least one binder, and a non-porous polymer layer which has a high refractive index and is in direct contact with the porous or nanoporous layer; said flexible material is characterized in that the maximum thicknesses of the boundary layers, in which the refractive index changes from one value to the other and which are located between the porous or nanoporous layers and the non-porous polymer layers that are in direct contact therewith, amount to 0.2 times wavelength ?2; and the difference in the refractive indices of the porous or nanoporous layers and the non-porous polymer layers is at least 0.20, 200 nm and 2500 nm being typical values for ?1 and ?2.

Abstract: In a manufacturing process for an injection molding plastic sheet with 3D texture, a mold with 3D texture is prepared, and then a plastic layer is formed by injection molding on the surface of the mold 3D texture. After the mold is released, a plastic board with 3D texture is formed. A photo-interfering layer is formed on the 3D texture of the plastic layer by vacuum electroplating or direct spraying. Finally, a protective layer with flat surface is formed on the photo-interfering layer.

Abstract: The present invention relates to a pressure-sensitive adhesive composition for optical filter used in Plasma Display Panel (PDP), a pressure-sensitive adhesive film, an optical filter and a PDP panel display device, using the same. More specifically, the present invention relates to a pressure-sensitive adhesive composition having a dynamic storage elastic modulus of 5×103˜5×104 Pa and a dynamic loss elastic modulus of 5×102˜5×103 Pa, at a temperature of 30° C. and a frequency of 0.01 Hz, and a dynamic storage elastic modulus of 8×103˜1×105 Pa and a dynamic loss elastic modulus of 1×103˜5×104 Pa, at a temperature of 30° C. and a frequency of 500 Hz. The pressure-sensitive adhesive according to the present invention and the optical filter applied by the adhesive comply with endurance reliability under high temperature/high humidity conditions, do not cause fine bubbles on bonding the optical filter directly to PDP and have excellent re-workability in adhering processes.

Abstract: An optical device, such as an interference mirror of the type which can be incorporated into ring laser gyros. One embodiment is an interference mirror having at least one layer formed from a matrix of material consisting of ZrO2 and about 2-15 weight percent of Al2O3.

Abstract: In this method for producing an anti-reflective film, pores are formed on a surface of a polymer molding material to continuously change a refractive index and then reduce reflectance, in which anodic oxidized porous alumina, in which pores having a tapered shape and whose pore diameter continuously changes, are formed by repeating anodic oxidation at about the same formation voltage and pore diameter enlargement treatment, is used as a mold, or a stamper, which is produced by using the anodic oxidized porous aluminum as a mold, is used as a mold.

Abstract: The present invention provides an anti-reflection film which weakens color in reflection light and prevents an occurrence of color unevenness. The anti-reflection film has a value in the range of 0.5-1.5% as an average luminous reflectance, a value in the range of 0.2-0.9% as a difference between the maximum and the minimum of spectral reflectance in the visible light region, a value in the range of 0.5-3.0% as an absorption loss in average luminous transmittance, a value in the range of 0.5-4.0% as a difference between the maximum and the minimum of absorption losses in light transmittance at all wavelengths within the visible light region, and a magnitude relation of Q450>Q550>Q650, where Q450, Q550 and Q650 is an absorption loss in light transmittance of said anti-reflection film at wavelengths of 450 nm, 550 nm 650 nm.

Abstract: A multilayer film-coated substrate having the stress of the film relaxed by depositing a multilayer film comprising a metal oxide film and a silicon oxide film on a substrate at a high speed by a sputtering method using a conductive sputtering material, and a process for producing a multilayer film-coated substrate having such a low stress, are presented. A multilayer film-coated substrate comprising a substrate and at least a metal oxide film and a silicon oxide film laminated thereon repeatedly at least once, wherein at least one layer of said metal oxide film is a metal oxide film deposited by sputtering by using, as the target material, a metal oxide MOX which is deficient in oxygen than the stoichiometric composition, to have the oxygen deficiency resolved, and the stress of the multilayer film is from ?100 MPa to +100 MPa.

Abstract: An optical filter including: a polarizing film; and a plurality of phase delay films laminated on one side of the polarizing film, the optical axes of the phase delay films crossing each other, the plurality of phase delay films phase-delaying light having wavelengths in the visible range incident through the polarizing film and phase-delaying light reflected from a surface, thereby allowing the incident light to be interfered with and offset by the reflected light.

Abstract: Disclosed is an antireflection film having high antifouling property. Specifically disclosed is an antireflection film comprising a transparent base, a high refractive index layer and a low refractive index layer. The low refractive index layer is made of a cured product of a polymerizable composition which contains hollow fine particles such as hollow silica particles, a modified silicone compound, and a second resin component such as a polyfunctional (meth)acrylate.

Abstract: The present invention relates to a grating image having one or more grating fields, each of which includes an electromagnetic radiation-influencing grating pattern comprising a plurality of grating lines, the grating lines being characterized by the parameters orientation, curvature, spacing and profile. According to the present invention, in the grating image, a grating field (30) that is separately perceptible with the naked eye includes an electromagnetic radiation-influencing grating pattern having grating lines (32) for which at least one of the characteristic parameters orientation, curvature, spacing and profile varies (34) across the surface of the grating field.

Abstract: An anti-reflection structure; includes: a plurality of convex parts arranged at pitches each of which is shorter than a wave length of a visible light ray, each of the convex parts being formed into one of a substantially truncated cone and a substantially truncated pyramid, each including: i) a base face formed into one of a base circle and a base polygon inscribed in the base circle, a) the base circle and b) the base circle circumscribing about the base polygon each having a base diameter Db meeting the following expression: 100 nm<Db<380 nm, ii) an upper face formed into one of an upper circle and an upper polygon inscribed in the upper circle, a) the upper circle and b) the upper circle circumscribing about the upper polygon each having an upper diameter Du meeting the following expression: 5 nm<Du<50 nm.

Abstract: The present invention relates to an optical article having anti-reflection properties and high thermal resistance, comprising a substrate having at least one main face coated with a multi-layer anti-reflection coating comprising a stack of at least one high refractive index layer and at least one low refractive index layer, wherein the ratio: R T = sum ? ? of ? ? the ? ? physical ? ? thicknesses ? ? of ? ? the low ? ? refractive ? ? index ? ? layers ? ? of ? ? the ? anti ? - ? reflection ? ? coating sum ? ? of ? ? the ? ? physical ? ? thicknesses ? ? of ? ? the high ? ? refractive ? ? index ? ? layers ? ? of ? ? the ? anti ? - ? reflection ? ? coating is higher than 2.1.

Abstract: An optical element irradiated with a light flux having a wavelength of 350 nm to 450 nm, is provided with a synthetic resin base material; and an antireflection film provided on the synthetic resin base material and including a contact layer being in contact with the synthetic resin base material, wherein the contact layer is a film made of a material containing no oxygen atom or a film made of a mixed material or a material containing no oxygen atom and a material containing an oxygen atom in which the mixed material contains the material containing an oxygen atom less than 10%.

Abstract: An antiglare film is provided, the antiglare film including: a transparent support; and an antiglare layer, wherein the antiglare layer contains a light-transmitting resin particle, a light-transmitting resin and a copolymerization product having an amine value of 1 to 30 mgKOH/g, and the average particle diameter of the light-transmitting resin particle is from 6 to 20 ?m.

Abstract: A non-polarizing beam splitter has a first prism; one or more ground layer(s) made of a dielectric material which is (are) formed on a slant face of the first right angle prism; an Au layer having thickness of 13 to 35 nm which is formed on the ground layer; one or more protective layer(s) made of a dielectric material which is (are) formed on the Au layer; and a second prism which is jointed to an outermost layer of the protective layer via adhesive. The non-polarizing beam splitter divides light at wavelength of 640 nm to 820 nm into transmission light and reflection light by a predetermined ratio.

Abstract: An optical mirror element includes an optically transmissive element having a first surface and a second surface, and a reflective coating layer on the first surface that defines a mirror surface. A first portion of the first surface does not include the reflective coating layer such that the first portion defines an optically transmissive window in the mirror surface. Q method of forming an optical mirror element having a window portion includes providing an optical element, masking a first portion of a first surface of the optical element, and thereafter applying a reflective coating to the first surface so as to define a reflective surface, wherein the masked portion defines a transmissive region in the reflective surface. The exposed portion of the first surface may be coated with an anti-reflective coating, either before or after the reflective coating is applied.

Abstract: The invention relates to a sheet comprising a substrate and a securing means including at least one area having an interferential effect, wherein the securing means further includes at least one tactile recognition member provided in the same region as said area having an interferential effect. The invention also relates to a security document and an article to be authenticated comprising said sheet.

Abstract: An optical filter and a plasma display device including the same are provided. The optical filter includes a support layer, and a plurality of stripe-shaped structures arranged at predetermined intervals on one surface of the support layer and formed using a material having a different refractive index than a refractive index of the support layer. In the optical filter, incident light is reflected at an interface between the support layer and the structure due to a difference of the respective refractive indices. Since the direction of entry of external light is the same as the reflected exit direction of the external light, visibility degradation caused by interference from the external light is minimized or reduced. Since the structure is formed using a material having a high transmittance, luminance loss of light generated by the display is also minimized.

Abstract: To provide a laminated glass for a vehicle window which can prevent the temperature increase in a vehicle. A laminated glass for a vehicle window which comprises a glass plate 12 to be disposed on the car exterior side when the laminated glass 1 is assembled in a vehicle, and an infrared reflection film 21 provided on the side of an infrared shielding interlayer 30 having infrared shielding fine particles dispersed therein, of the glass plate 12, wherein the reflectance to light at all wavelengths of from 900 to 1,100 nm is from 30 to 50%, the absorptivity to light at all wavelengths of from 1,100 to 1,300 nm is from 35 to 60%, and the transmittance to light at all wavelengths of from 900 to 1,500 nm is at most 30%.

Abstract: An optical rotary joint comprises a first collimator arrangement for coupling-on first light-waveguides and a second collimator arrangement for coupling-on second light-waveguides, with the second collimator arrangement being supported to be rotatable relative to the first collimator arrangement about a rotation axis. A Dove prism is provided between the collimator arrangements as a derotating element. An intermediate layer is provided on at least one boundary face of an optical constituent part to a surrounding medium, which the intermediate layer comprises a nano-structure having a mean refractive index lying between a refractive index of a material of the optical constituent part and a refractive index of the medium of the surroundings.

Abstract: To provide a laminated glass for a vehicle window which can prevent the temperature increase in a vehicle. An infrared reflection glass plate which is a glass plate with an infrared reflection film, wherein the infrared reflection film has a stacked coating film (X) having a coating film (1) made of a high refractive index inorganic material having a refractive index of at least 1.90 and a coating film (2) made of a low refractive index inorganic material having a refractive index of at most 1.56 alternately stacked in this order from the glass plate side; the total number of the coating film (1) and the coating film (2) is at least 3; and the geometrical thickness of the coating film (1) is from 70 to 150 nm and the geometrical thickness of the coating film (2) is from 100 to 200 nm.

Abstract: Optical member includes at least two layers of different indices of refraction. At least one of the layers has optical deformities at an interface between at least the two layers.

Abstract: A glazing panel having beneficial anti-solar properties comprises a vitreous substrate carrying a tin/antimony oxide coating layer containing tin and antimony in a Sb/Sn molar ratio of from 0.01 to 0.14. In one application the coated substrate has a solar factor FS of less than 70% and the panel is formed by chemical vapor deposition from a reactant mixture comprising a source of tin and a source of antimony. In another application it is particularly suitable for use in vehicle glazing, in particular in vehicle roof windows, and the coated substrate has a spray-formed pyrolytic tin/antimony oxide coating having a thickness of at least 400 nm and, whereby the coated substrate has a luminous transmittance (TL) of less than 35% and a selectivity (TL/TE) of at least 1.3.

Abstract: Methods of fabricating a static interferometric image device and static interferometric image device formed by the same are disclosed. In one embodiment, a method includes providing a substrate. A plurality of liquid layers are formed over the substrate by an inkjet process such that the layers are lateral to one another. The liquid layers contain a solidifiable material or particles. Then, the plurality of liquid layers are solidified to form a plurality of solid layers. In some embodiments, the substrate includes pre-defined cavities, and the liquid layers are formed in the cavities. In other embodiments, the substrate includes a substantially planar, stepped, or continuously transitioning surface, and the liquid layers are formed on the surface. The inkjet process provides optical fillers or spacers for defining interferometric gaps between absorbers and reflectors in the display device, based at least partially on an image that the display device is designed to display.

Abstract: There is provided a thermoplastic resin film having a retardation close to 0 nm, in particular, a thermoplastic resin film having a retardation close to 0 nm, thereby showing a small optical anisotropy, and a method for producing the same. The method for producing a thermoplastic resin film includes a step of heat treating a thermoplastic resin film 16 at a glass transition temperature of the thermoplastic resin Tg° C. or higher and Tg+50° C. or lower for 10 seconds or longer and 600 seconds or shorter while conveying the thermoplastic resin film at a tension of 2 N/cm2 or higher and 50 N/cm2 or lower, whereby the thermoplastic resin film 16 has an in-plane retardation (Re) and a retardation in the thickness direction (Rth) close to 0 nm, respectively.

Abstract: Opaque glitter particles that are uniform in size and shape are disclosed that have an optically variable color with a change in angle of incident light. The glitter particles have an organic substrate and an optical interference structure on one or both sides of the organic substrate. The optical interference design can be a Fabry-Perot structure or can be an optically variable ink.

Abstract: In accordance with the teachings of one embodiment of the present disclosure, a method for manufacturing a semiconductor device includes forming a support structure outwardly from a substrate. The support structure has a first thickness and a first outer sidewall surface that is not parallel with the substrate. The first outer sidewall surface has a first minimum refractive index. A first anti-reflective layer is formed outwardly from the support structure and outwardly from the substrate. A second anti-reflective layer is formed outwardly from the first anti-reflective layer. The first and second anti-reflective layers each includes respective compounds of at least two elements selected from the group consisting of: silicon; nitrogen; and oxygen.

Abstract: Objective lens 10 as an optical element of the present invention exhibits excellent optical stability maintained for a long duration. Disclosed is a resin composition constituting the optical element contains a thermoplastic resin, a curable resin, and inorganic particles having an average particle diameter of 1-50 nm.

Abstract: A reflective optical element (1) for radiation with a wavelength ? in the ultraviolet wavelength range comprises a reflective surface (6), and a dielectric multilayer system (4) formed on the reflective surface (6) which comprises at least two successive pairs of layers (5.i, 5.i+1), each pair of layers (5.1 to 5.N) consisting of a high refractive index layer (H1 to HN) alternating with a low refractive index layer (L1 to LN), wherein the optical thicknesses (Hi, Hi+1) of the high refractive index layers (Hi, Hi+1) and the optical thicknesses (Li, Li+1) of the low refractive index layers (Li, Li+1) of each adjacent pair of layers (5.i, 5.i+1) are different from each other.

Abstract: An optical film, includes: a transparent support; and at least one low refractive index layer on or above the transparent support, wherein the low refractive index layer is formed from a low refractive index layer forming composition containing (A) a hydrophobic polyrotaxane compound, (B) a fluorine-containing copolymer and an organic solvent.

Abstract: A light filter includes exactly one partially reflective layer having a top and a bottom and a wedge-shaped profile defining a wedge direction. First and second transparent layers are disposed on the top and bottom, respectively, of the partially reflective layer, each transparent layer including at least two dielectric layers of two different materials, each dielectric layer having a wedge-shaped profile oriented in the wedge direction. A photospectrometer including a light filter with the wedge-shaped profile is also disclosed.

Abstract: The disclosure relates to an optical element and illumination optics for microlithography. The optical element can be configured to influence a nominal beam angle, preset over a beam cross-section, of a radiation beam hitting the optical element. Moreover, the disclosure relates to an illumination optics for the microlithography with at least one such optical element and an illumination system for the microlithography with such an illumination optics.

Abstract: The present disclosure relates to an optical member and an optical device including the optical member. More particularly, the present disclosure relates to an optical member whose surface is configured to be an antireflection concave-convex structure for suppressing reflection of incident light, and an optical device including the optical member. The present invention provides an antireflection concave-convex structure having an excellent environmental resistance. An optical member (antireflection concave-convex structure) (1) includes: an optical member body (10); and a protective film (20) covering a surface (10a) of the optical member body (10) and transmitting the incident light. On the surface (10a) of the optical member body (10), a plurality of fine convex portions (12) are arranged to form an antireflection concave-convex structure (11) for suppressing reflection of incident light.

Abstract: A polarizing plate of the present invention comprises: main four sides which form a quadrangle or a substantially quadrangular shape, wherein the quadrangle or the substantially quadrangular shape is a non-rectangular shape having four interior angles each of which is in the range of 80° to 100°, provided that at least two of the four interior angles are not 90°, the non-rectangular polarizing plate has an in-plane absorption axis, a largest rectangle having four sides in directions parallel and perpendicular to the absorption axis of the polarizing plate can be drawn as a hypothetical rectangle in the plane of the non-rectangular polarizing plate, the hypothetical rectangle has a side which is closest to the non-rectangular shape and makes angles in the range of 0° to 5° with the non-rectangular shape, and at least one of the angles is an acute angle in the range of 1° to 5°. The polarizing plate can smoothly undergo reworking even when it has a reduced thickness.

Abstract: Methods and optical devices are proposed, which comprise a nanostructure (4) on a curved surface so that a broadband antireflective characteristic is obtained.

Abstract: The present invention relates to a security element in the form of a strip. The strip exhibits optical effects which vary, depending on the illumination or viewing direction. The optical effects are provided only in one or more definably delimited, mutually spaced surface regions. The strip outside the visually variable surface regions is transparent or is adapted to the appearance of the surface of the substrate.

Abstract: The present invention discloses an antistatic optical laminate. The optical laminate comprises a light transparent base material and at least an antistatic layer provided on the light transparent base material, wherein the antistatic layer comprises an electroconductive polymer as an antistatic agent, the surface of the antistatic layer has a concavoconvex shape, and the height of convexes in the antistatic layer is not less than 40 nm and not more than 300 nm.

Abstract: An active matrix display device which can easily improve the viewing angle characteristics. In the active matrix display device where light is emitted in the direction of a substrate over which thin film transistors are formed, when focusing on the multiple interference caused by the light emitted from a light-emitting element, which is reflected on the film used for forming the thin film transistors, effect on the multiple interference can be drastically reduced by forming the reflecting film to have the substantial optical thickness of ?/2, without losing the function of the thin film transistor.

Abstract: An optical multi-layer thin film comprises: an outermost layer (13) which is stacked above an optical surface (11) of an optical substrate (10), and which has a lower refractive index than that of the optical substrate (10); and at least certain refractive index layer (14) which is disposed between the optical substrate (10) and the outermost layer (13), and which has a refractive index adjustable in a predetermined range higher than that of the outermost layer (13), wherein the outermost layer (13) is formed by a wet film-formation method using: low-refractive-index fine particles (15) made of a low-refractive-index material having a lower refractive index than that of the optical substrate (10); and a first binder (16), and the certain refractive index layer (14) is formed by a wet film-formation method using: high-refractive-index fine particles (18) made of a high-refractive-index material having a higher refractive index than that of the low-refractive-index material; and a second binder (19) which has a

Abstract: A pressure-sensitive adhesive optical film of the present invention comprises an optical film; and a pressure-sensitive adhesive layer laminated on at least one side of the optical film, wherein the pressure-sensitive adhesive layer is formed from an acrylic pressure-sensitive adhesive comprising a (meth)acrylic polymer comprising 30 to 99.99% by weight of an alkyl (meth)acrylate monomer unit and 0.01 to 15% by weight of a functional group-containing monomer unit, and the (meth)acrylic polymer in the acrylic pressure-sensitive adhesive is crosslinked by electron beam irradiation. The pressure-sensitive adhesive optical film has a high level of reworkability, durability and workability.

Abstract: The present invention provides a plastic optical element with excellent durability and an optical pickup device with excellent pickup property. The plastic optical element is an plastic optical element with a gas barrier film comprising a resin substrate and provided thereon, at least one ceramic layer, the residual stress of the ceramic layer being from 0.01 to 100 MPa in terms of compression stress, and a density ratio Y (=?f/?b) satisfying the following inequality: 1?Y>0.95 wherein ?f represents a density of the ceramic layer, and ?b represents a density of a layer which has the same composition ratio as the ceramic layer and which has been formed by thermal oxidation or thermal nitridation of a metal which is a base material of the ceramic layer.

Abstract: An object of the present invention is to provide an optical film assured of reflectance low enough to suppress glaring and excellent in the scratch resistance, antifouling property and antistatic property, and another object is to provide a polarizing plate and a display, using such an antireflection film. These objects can be attained by an optical film, particularly, an antireflection film, containing a support and a thin film layer formed by coating a composition containing fine particles and a binder, in which the SP value ((B/A)×100)) which is a ratio of an average particle filling factor (B) in the region of 30% of the film thickness on the upper side opposite the support to an average particle filling factor (A) in the entirety of the thin film layer is 90% or less; and a polarizing plate and an image display, using the optical film.

Abstract: An entirely passive all-optical device, referred to as an optical hard limiter, includes alternating layers of materials having oppositely signed Kerr coefficients and substantially different linear indices of refraction, wherein the higher linear index material has the negative Kerr coefficient and the lower index material has the positive Kerr coefficient. The optical device has two distinct transmittance curves. Various optical devices and systems can be built from such optical hard limiters.