Abstract: A display system for sensing a finger of a user applied to the display system includes a display panel; a sensor for sensing the finger; a sensing light source configured to emit a first light having a first wavelength W1; and a reflective polarizer disposed between the display panel and the sensor. For a substantially normally incident light, an optical transmittance of the reflective polarizer versus wavelength for a first polarization state has a band edge such that for a first wavelength range extending from a smaller wavelength L1 to a greater wavelength L2 and including W1, where 30 nm?L2?L1?50 nm and L1 is greater than and within about 20 nm of a wavelength L3 corresponding to an optical transmittance of about 50% along the band edge, the optical transmittance has an average of greater than about 75%.

Abstract: A backlight includes an extended light source adapted to emit light. A reflective polarizer is disposed on the extended light source, such that for substantially normally incident light and for at least a first wavelength in a range from about 420 nanometer (nm) to about 650 nm, the reflective polarizer reflects at least 60% of the incident light having a first polarization state and transmits at least 60% of the incident light having an orthogonal second polarization state. A first prismatic film is disposed between the extended light source and the reflective polarizer. A retarder layer is disposed between the reflective polarizer and the first prismatic film, such that for substantially normally incident light at a wavelength of about 550 nm, the retarder layer has a retardance nW, where n is an integer ?1 and W is a wavelength between about 160 nm and about 300 nm.

Abstract: An optical construction includes a reflective polarizer and an optically diffusive film disposed on the reflective polarizer. The reflective polarizer includes an outer layer including a plurality of first particles partially protruding from a first major surface thereof to form a structured major surface. A first optically diffusive layer is conformably disposed on the structured major surface. The optically diffusive film includes a second optically diffusive layer including a plurality of nanoparticles dispersed therein, and a structured layer including a structured major surface. For a substantially normally incident light and a visible wavelength range from about 450 nm to about 650 nm and an infrared wavelength range from about 930 nm to about 970 nm, the second optically diffusive layer has an average specular transmittance Vs in the visible wavelength range and an average specular transmittance Is in the infrared wavelength range, where Is/Vs?2.5.

Abstract: Optical devices comprising at least one optical layer and at least one antistatic layer disposed on at least one surface of the optical layer wherein the antistatic layer comprises the reaction product of: (a) at least one polymerizable onium salt; and (b) at least one polymerizable, non-onium, silicone or perfluoropolyether moiety-containing monomer, oligomer, or polymer.

Abstract: An optical construction includes a reflective polarizer and an optically diffusive film disposed on the reflective polarizer. The reflective polarizer includes an outer layer including a plurality of first particles partially protruding from a first major surface thereof to form a structured major surface. A first optically diffusive layer is conformably disposed on the structured major surface. The optically diffusive film includes a second optically diffusive layer including a plurality of nanoparticles dispersed therein, and a structured layer including a structured major surface. For a substantially normally incident light and a visible wavelength range from about 450 nm to about 650 nm and an infrared wavelength range from about 930 nm to about 970 nm, the second optically diffusive layer has an average specular transmittance Vs in the visible wavelength range and an average specular transmittance Is in the infrared wavelength range, where Is/Vs?2.5.

Abstract: Optical films and stacks include at least one optically diffusive layer. The optically diffusive layer can include a plurality of nanoparticles and a polymeric material bonding the nanoparticles to each other to form a plurality of nanoparticle aggregates defining a plurality of voids therebetween. For substantially normally incident light and a visible wavelength range from about 450 nm to about 650 nm and an infrared wavelength range from about 930 nm to about 970 nm: in the visible wavelength range, the optical film or optically diffusive layer has an average specular transmittance Vs; and in the infrared wavelength range, the optical film or optically diffusive layer has an average total transmittance It and an average specular transmittance Is, Is/It?0.6, Is/Vs?2.5.

Abstract: A display system for sensing a finger of a user applied to the display system includes a display panel; a sensor for sensing the finger; a sensing light source configured to emit a first light having a first wavelength W1; and a reflective polarizer disposed between the display panel and the sensor. For a substantially normally incident light, an optical transmittance of the reflective polarizer versus wavelength for a first polarization state has a band edge such that for a first wavelength range extending from a smaller wavelength L1 to a greater wavelength L2 and including W1, where 30 mn?L2?L1?50 nm and L1 is greater than and within about 20 nm of a wavelength L3 corresponding to an optical transmittance of about 50% along the band edge, the optical transmittance has an average of greater than about 75%.

Abstract: A backlight includes an extended light source adapted to emit light. A reflective polarizer is disposed on the extended light source, such that for substantially normally incident light and for at least a first wavelength in a range from about 420 nanometer (nm) to about 650 nm, the reflective polarizer reflects at least 60% of the incident light having a first polarization state and transmits at least 60% of the incident light having an orthogonal second polarization state. A first prismatic film is disposed between the extended light source and the reflective polarizer. A retarder layer is disposed between the reflective polarizer and the first prismatic film, such that for substantially normally incident light at a wavelength of about 550 nm, the retarder layer has a retardance nW, where n is an integer ?1 and W is a wavelength between about 160 nm and about 300 nm.

Abstract: Optical devices comprising at least one optical layer and at least one antistatic layer disposed on at least one surface of the optical layer wherein the antistatic layer comprises the reaction product of: (a) at least one polymerizable onium salt; and (b) at least one polymerizable, non-onium, silicone or perfluoropolyether moiety-containing monomer, oligomer, or polymer.

Abstract: A polarizer including an oriented polymeric first layer is described. The oriented polymeric first layer is preparable from a mixture of polyvinyl alcohol and crosslinker where the crosslinker is included in the mixture at 5 to 40 percent by weight based on the total weight of the polyvinyl alcohol and crosslinker. The oriented polymeric first layer is a substantially uniaxially drawn layer, in that for U=(1/MDDR?1)/(TDDR1/2?1), U is at least 0.85, with MDDR being a machine direction draw ratio and TDDR being a transverse direction draw ratio.

Abstract: A microstructured diffuser is described comprising a light transmissive film comprising a first microstructured surface comprising a plurality of peaks and valleys. A coating is disposed on the first microstructured surface. The coating partially fills the valleys forming a second microstructured surface.

Abstract: A polarizer including an oriented polymeric first layer is described. The oriented polymeric first layer is preparable from a mixture of polyvinyl alcohol and crosslinker where the crosslinker is included in the mixture at 5 to 40 percent by weight based on the total weight of the polyvinyl alcohol and crosslinker. The oriented polymeric first layer is a substantially uniaxially drawn layer, in that for U=(1/MDDR?1)/(TDDR1/2?1), U is at least 0.85, with MDDR being a machine direction draw ratio and TDDR being a transverse direction draw ratio.

Abstract: A process and apparatus for producing a gradient nanovoided article, a gradient nanovoided coating, and a gradient low refractive index coating is described. The process includes providing a first solution of a polymerizable material in a solvent, and providing a first environment proximate a first region of the coating and a different second environment proximate an adjacent region of the coating. The process further includes at least partially polymerizing the polymerizable material to form a composition that includes an insoluble polymer matrix and a second solution. The insoluble polymer matrix includes a plurality of nanovoids that are filled with the second solution, and a major portion of the solvent from the second solution is removed. A first volume fraction of the plurality of nanovoids proximate the first region of the coating is less than a second volume fraction of the plurality of nanovoids proximate an adjacent of the coating.

Abstract: Presently described are optical stacks comprising a first optical film comprising a plurality of structures comprising an optically active portion designed primarily to provide optical gain and optionally an optically in-active bonding portion disposed on a first surface bonded to a second optical film with a light-transmissive adhesive layer such that a portion of the structures penetrate the adhesive layer and a separation is provided between the adhesive layer and the first surface. In one embodiment, the optical stacks exhibit a combination of high peel strength and high retained brightness, particularly after aging. The adhesive layer preferably comprises an interpenetrating network of the reaction product of a polyacrylate component and a polymerizable monomer and the adhesive layer has an elastic modulus ranging from 100 to 2000 MPa at 25° C.

Abstract: Articles are described such as optical films and optical film stacks 2000. The articles include a substrate 2070 and a primer layer 2075 disposed on the substrate wherein the primer layer comprises a polyacrylate and a nitrogen-containing polymer. The article further includes an adhesive layer 2060 disposed onto the primer layer wherein the adhesive layer comprises a polyacrylate component. In some embodiments, the adhesive is further bonded to a second substrate 2010 or a release liner.

Abstract: Presently described are optical stacks comprising a first optical film comprising a plurality of structures comprising an optically active portion designed primarily to provide optical gain and optionally an optically in-active bonding portion disposed on a first surface bonded to a second optical film with a light-transmissive adhesive layer such that a portion of the structures penetrate the adhesive layer and a separation is provided between the adhesive layer and the first surface. In one embodiment, the optical stacks exhibit a combination of high peel strength and high retained brightness, particularly after aging. The adhesive layer preferably comprises an interpenetrating network of the reaction product of a polyacrylate component and a polymerizable monomer and the adhesive layer has an elastic modulus ranging from 100 to 2000 MPa at 25° C.

Abstract: An article is described comprising a substrate, a pressure sensitive polyacrylate primer layer disposed on the substrate, and an adhesive layer disposed onto the primer layer; wherein the adhesive layer comprises a polyacrylate component. The adhesive layer is typically further bonded to a second substrate or a release liner. In some embodiments, at least one substrate further comprises a microstructured surface layer and the primer layer is bonded to the microstructured surface layer. In other embodiments, the adhesive layer is further bonded to a (e.g. post) structure. In some embodiments, the articles are optical films or optical film stacks. Methods of making an (e.g. adhesive coated) article are also described.

Abstract: Presently described are optical stacks comprising a first optical film comprising a plurality of structures comprising an optically active portion designed primarily to provide optical gain and optionally an optically in-active bonding portion disposed on a first surface bonded to a second optical film with a light-transmissive adhesive layer such that a portion of the structures penetrate the adhesive layer and a separation is provided between the adhesive layer and the first surface. In one embodiment, the optical stacks exhibit a combination of high peel strength and high retained brightness, particularly after aging. The adhesive layer preferably comprises an interpenetrating network of the reaction product of a polyacrylate component and a polymerizable monomer and the adhesive layer has an elastic modulus ranging from 100 to 2000 MPa at 25° C.

Abstract: Articles are described such as optical films and optical film stacks 2000. The articles include a substrate 2070 and a primer layer 2075 disposed on the substrate wherein the primer layer comprises a polyacrylate and a nitrogen-containing polymer. The article further includes an adhesive layer 2060 disposed onto the primer layer wherein the adhesive layer comprises a polyacrylate component. In some embodiments, the adhesive is further bonded to a second substrate 2010 or a release liner.

Abstract: An article is described comprising a substrate, a pressure sensitive polyacrylate primer layer disposed on the substrate, and an adhesive layer disposed onto the primer layer; wherein the adhesive layer comprises a polyacrylate component. The adhesive layer is typically further bonded to a second substrate or a release liner. In some embodiments, at least one substrate further comprises a microstructured surface layer and the primer layer is bonded to the microstructured surface layer. In other embodiments, the adhesive layer is further bonded to a (e.g. post) structure. In some embodiments, the articles are optical films or optical film stacks. Methods of making an (e.g. adhesive coated) article are also described.