Abstract: A sample collection device including a housing extending from a mouthpiece portion to an air outlet portion. The housing defines an airflow channel from the mouthpiece portion to the air outlet portion. The mouthpiece portion is configured to receive an h exhalation airflow. A porous sample collection media is disposed within the housing and along the airflow channel. A fluid inlet port defines an aperture through the housing and is adjacent to the porous sample collection media. The fluid inlet port is configured to direct id onto the porous sample collection media. A metered fluid dose element is attached to the fluid inlet port. The metered fluid dose element is configured to dispense a metered volume of fluid into the fluid inlet port.

Abstract: A gradient permittivity film comprises (a) a first permittivity layer comprising a first continuous matrix of a first material having a first relative permittivity (?r1) and a second component having a second relative permittivity (?r2) dispersed in the first continuous matrix, the first permittivity layer having a first effective layer relative permittivity (?1) and a thickness (T1); And (b) a second permittivity layer having a second effective layer relative permittivity (?2) and a thickness (T2) disposed on the first permittivity layer. T1=0.8(t1) to 1.2(t1), where t 1 = c 4 ? f ? ? 1 ; ? T 2 = 0.8 ( t 2 ) ? to 1.2 ( t 2 ) , where ? t 2 = c 4 ? f ? ? 2 .

Abstract: A polymeric film including a major surface having a plurality of intersecting extended structures is described. For at least a majority of the structures in the plurality of extended structures: each structure extends along a length of the structure, has an average width along a direction transverse to the length and generally along the first major surface, and has an average height along a direction generally perpendicular to the first major surface; and the average width of the structure may be in a range of 1 to 200 micrometers, the average height of the structure may be in a range of 1 to 200 micrometers, and the length may be at least 3 times the average width. The extended structures may be randomly or pseudorandomly oriented and may be formed by microreplicating a surface of a paper.

Abstract: An optical construction includes a reflective polarizer and an optical film. The optical film includes a matrix and a plurality of first particles dispersed in the matrix. Each of the matrix and the plurality of first particles includes a silicone polyoxamide and an acrylate polymer. For substantially normally incident light and for at least a first wavelength in a first wavelength range, the reflective polarizer reflects about 60% for a first polarization state and transmits about 40% for an orthogonal second polarization state. For at least a second wavelength in a second wavelength range, each of the reflective polarizer and the optical film transmits about 60% of an incident light for each of the first and second polarization states. For at least the first wavelength, optical film has an optical haze and a depolarization ratio. A ratio of the depolarization ratio to the optical haze is less than 0.1.

Abstract: A measurement system is disclosed and includes a light source, a receiver, a measurement subject, and a reflector. The reflector is disposed on an opposite side of the measurement subject than are the light source and the receiver.

Abstract: An optical film for reducing at least one of sparkle and moire in a display system includes a structured first major surface that, in at least a first cross-section in a first plane substantially orthogonal to the optical film, has a sinusoidal shape having a variable pitch of greater than about 0.5 microns. For a substantially normally incident light and blue, green, and red wavelengths that are at least 50 nm apart from each other and are disposed within respective blue, green, and red wavelength ranges, optical transmissions of the optical film versus transmitted angle for the blue, green and red wavelengths have respective blue, green, and red transmission bands disposed at angles greater than about 1 degree and having respective blue, green, and red full width at half maxima (FWHMs), at least two of which at least partially overlap.

Abstract: An optical system for examining an optical characteristic of a test material at at least a first wavelength includes an elongated hollow structure elongated along a length thereof and having one or more walls extending along the length of the hollow structure and defining an elongated chamber therebetween configured to receive the test material. The elongated hollow structure includes at least a first light opening, such that for the at least the first wavelength, the one or more walls have an optical reflectance of greater than about 50% for incident angles of up to at least 40 degrees, and at least one of the at least the first light opening has an optical transmittance of greater than about 50% for at least one incident angle.

Abstract: A gradient permittivity film comprises (a) a first permittivity layer comprising a first continuous matrix of a first material having a first relative permittivity (?r1) and a second component having a second relative permittivity (?r2) dispersed in the first continuous matrix, the first permittivity layer having a first effective layer relative permittivity (?1) and a thickness (T1); And (b) a second permittivity layer having a second effective layer relative permittivity (?2) and a thickness (T2) disposed on the first permittivity layer. T1=0.8(t1) to 1.2(t1), where t 1 = c 4 ? f ? ? 1 ; ? T 2 = 0.8 ( t 2 ) ? to 1.2 ( t 2 ) , where ? t 2 = c 4 ? f ? ? 2 .

Abstract: An optical adhesive including a viscoelastic or elastomeric adhesive layer and a cured polymer layer immediately adjacent the viscoelastic or elastomeric adhesive layer is described. The viscoelastic or elastomeric adhesive layer a refractive index less than 1.570 and the cured polymer layer has a refractive index of at least 1.570. An interface between the viscoelastic or elastomeric adhesive layer and the cured polymer layer is structured. The cured polymer layer has a storage modulus of at least 2000 MPa at 20° C. and a glass transition temperature of no more than 65° C.

Abstract: A gradient permittivity film comprises (a) a first permittivity layer comprising a first continuous matrix of a first material having a first relative permittivity (?r1) and a second component having a second relative permittivity (?r2) dispersed in the first continuous matrix, the first permittivity layer having a first effective layer relative permittivity (?1) and a thickness (T1); and (b) a second permittivity layer having a second effective layer relative permittivity (?2) and a thickness (T2) disposed on the first permittivity layer T1=0.8(t1) to 1.2(t1), where t1=(I); T2=0.8(t2) to 1.2 (T2), where T2=(II).

Abstract: According to various embodiments of the present disclosure, a composition includes about 5 to about 40 parts by weight of a solute copolymer component. The solute component optionally has one Tg or Tm of at least 25° C. The composition further includes about 60 to about 95 parts by weight of a solvent monomer. The solvent monomer component includes (meth)acrylate monomers and a multifunctional acrylate. The sum of the solute copolymer component and the solvent monomer component is 100 parts by weight. The composition further includes about 5 to about 100 parts of a plasticizer, relative to the 100 parts. The plasticizer component comprises at least one plasticizer comprising an acid group.

Abstract: A recycling optical cavity is defined at least by first and second optical films and is configured to receive a test material therein. The test material is configured to emit at least a second light having a second wavelength when irradiated with a first light having a first wavelength. For at least one of s- and p-polarized incident lights incident in an incident plane, and at the first and second wavelengths: at a first incident angle, the first optical film has respective optical transmittances T11(?1) and T12(?1), and the second optical film has respective optical transmittances T21(?1) and T22(?1), wherein T11(?1)>T12(?1), T21(?1), T22(?1); and at a second incident angle, the first optical film has respective optical transmittances T11(?2) and T12(?2), and the second optical film has respective optical transmittances T21(?2) and T22(?2), wherein T21(?2)>T11(?2), T12(?2), T22(?2).

Abstract: Curable ink compositions include at least one aromatic (meth)acrylate, at least one multifunctional (meth)acrylate with heteroaromatic groups, fused aromatic groups, heteroalkylene groups, or a group containing both heteroalkylene and aromatic groups, and a photoinitiator. The curable ink composition is Inkjet printable, having a viscosity of 30 centipoise or less at a temperature of from room temperature to 35° C., and is free from solvents. The ink composition, when printed and cured has a refractive index of 1.55 or greater, and is optically clear. The cured ink composition, when cured to a thickness of from 1-16 micrometers, has a surface roughness of less than or equal to 5 nanometers.

Abstract: According to various embodiments of the present disclosure, a composition includes about 5 to about 40 parts by weight of a solute copolymer component. The solute component optionally has one Tg or Tm of at least 25° C. The composition further includes about 60 to about 95 parts by weight of a solvent monomer. The solvent monomer component includes (meth)acrylate monomers and a multifunctional acrylate. The sum of the solute copolymer component and the solvent monomer component is 100 parts by weight. The composition further includes about 5 to about 100 parts of a plasticizer, relative to the 100 parts.

Abstract: Headsets and head-mounted displays including first and second diffractive elements are described. In some cases, the first and second diffractive elements include first and second grating surfaces, and for at least one wavelength, the first and second grating surfaces have at least one different corresponding diffractive property. The head-mounted display may include two-dimensionally pixelated adjacent first and second display surfaces for displaying images, and first and second diffractive elements disposed adjacent the respective first and second display surfaces. In some cases, the first diffractive element is configured to diffract a first wavelength ?1, but not a different second wavelength ?2, into zero and first diffraction orders having intensities within 5% of each other, and the second diffractive element is configured to diffract the second wavelength ?2, but not the first wavelength ?1, into zero and first diffraction orders having intensities within 5% of each other.

Abstract: A multilayer optical film including a first layer having an index of refraction n1 at a wavelength ? in a range from about 580 nm to about 650 nm, and a second layer having an index of refraction n2 at ? is described. The first and second layers define an interface therebetween comprising a two-dimensional grating. The grating may have an average height H such that |n1?n2|*H is in a range from 0.24 micrometers to 0.3 micrometers. Optical systems including the multilayer optical film are described. A subpixel in a display surface of the optical system may be diffracted into a zero diffraction order and a plurality of first diffraction orders where the intensities of the zero and first diffraction orders are with 10% of each other at ?. The optical system may have a modulation transfer function greater than 0.4 at 10 line pairs per millimeter.

Abstract: Transfer tapes include a releasing substrate and an adhesive layer adjacent to the surface of the releasing substrate. The adhesive layer includes a cured copolymer prepared from a reaction mixture that includes at least one alkyl (meth)acrylate, at least one ethylenically unsaturated silane, and an initiator. The adhesive layer is a pressure sensitive adhesive at room temperature and is convertible into a ceramic-like layer by bake-out at a temperature of from 170-500°.

Abstract: Transfer tapes include a releasing substrate and an adhesive layer adjacent to the surface of the releasing substrate. The adhesive layer includes a at least one siloxane-based copolymer, and at least one siloxane tackifying resin. The adhesive layer is a pressure sensitive adhesive at room temperature and is convertible into a ceramic-like layer by bake-out at a temperature of from 100-500°.

Abstract: A film including a resin layer comprising a structured major surface opposite a second major surface, the structured major surface including a plurality of features; a barrier layer on the structured major surface; and a first adhesive layer on the barrier layer.

Abstract: A polymeric film including a major surface having a plurality of intersecting extended structures is described. For at least a majority of the structures in the plurality of extended structures: each structure extends along a length of the structure, has an average width along a direction transverse to the length and generally along the first major surface, and has an average height along a direction generally perpendicular to the first major surface; and the average width of the structure may be in a range of 1 to 200 micrometers, the average height of the structure may be in a range of 1 to 200 micrometers, and the length may be at least 3 times the average width. The extended structures may be randomly or pseudorandomly oriented and may be formed by microreplicating a surface of a paper.