Abstract: An optical body includes a substrate having a concave-convex surface, a reflecting layer formed on the concave-convex surface, and an optical layer formed on the reflecting layer to embed the concave-convex surface, wherein the reflecting layer directionally reflects light, the concave-convex surface is made up of a plurality of triangular pillars arrayed in a one-dimensional pattern, and the triangular pillar has an apex angle ? and a slope angle ?, the apex angle ? and the slope angle ? satisfying a formula (1) or (2) given below: 30???4.5??285(70???80)??(1) 30????1.5?+195(80???100)??(2).

Abstract: A security element for manufacturing value documents, such as banknotes, checks or the like, has an upper side making available several micro images, in particular for a lens magnification arrangement. Each micro image is formed by a micro cavity structure having a multitude of micro cavities disposed side by side, the micro cavities have an extension of 0.5 to 3 ?m respectively in a spatial direction disposed parallel to the upper side. The micro cavity structure is optically reflective or highly refractive on its surface, so that on the surface at least partial reflection takes place, and for each micro image micro cavities of at least a first and a second type are present, which differ by an aspect ratio of the micro cavities, whereby each micro image is structured by the at least two different types of micro cavities.

Abstract: The invention relates to an optically variable element as well as a method for the production thereof. In a first area the optically variable element has at least one first color region which in the event of illumination generates a color dependent on the angle of observation and/or angle of illumination. The first color region has two or more zones (41 to 47) arranged next to each other. The two or more zones arranged next to each other have in each case a width and/or length dimension of less than 300 ?m. In at least one first zone (41) of the zones (41 to 47) of the first color region a thin-film interference filter (15) is provided with at least one interference layer (17). The interference layer (17) of the thin-film interference filter (15) has a first average thickness (d1) in the first zone (41).

Abstract: In one embodiment, a multilayer dielectric coating for use in an alkali laser includes two or more alternating layers of high and low refractive index materials, wherein an innermost layer includes a thicker, >500 nm, and dense, >97% of theoretical, layer of at least one of: alumina, zirconia, and hafnia for protecting subsequent layers of the two or more alternating layers of high and low index dielectric materials from alkali attack. In another embodiment, a method for forming an alkali resistant coating includes forming a first oxide material above a substrate and forming a second oxide material above the first oxide material to form a multilayer dielectric coating, wherein the second oxide material is on a side of the multilayer dielectric coating for contacting an alkali.

Abstract: An optical filter may reduce the frequency and/or severity of photophobic responses or for modulating circadian cycles by controlling light exposure to cells in the human eye in certain wavelengths, such as 480 nm and 590 nm, and a visual spectral response of the human eye. The optical filter may disrupt the isomerization of melanopsin in the human eye reducing the availability of the active isoform, whereas the attenuation of light weighted across the action potential spectrum of the active isoform attenuates the phototransduction cascade leading to photophobic responses. Embodiments of an optical filter are described. In one embodiment an optical filter may be configured to transmit less than a first amount of light in certain wavelengths, and to transmit more than a second amount of light weighted across the visual spectral response. Methods of use and methods of manufacturing optical filters are also described.

Abstract: A tilt structure includes a shaft section formed on a substrate section, a tilt structure film having one end formed on an upper surface of the shaft section, and the other end bonded to the substrate section, and a thin film section provided to the tilt structure film, located on a corner section composed of the upper surface of the shaft section and a side surface of the shaft section, and having a film thickness thinner than the tilt structure film, the tilt structure film is bent in the thin film section, and an acute angle is formed by the substrate section and the tilt structure film.

Abstract: Optical filter elements each include a parallelogram-shaped substrate with parallel light entrance and light exit surfaces and parallel slanted sidewalls slanted at an angle, and an interference filter disposed on one or both of the light entrance surface and the light exit surface. The optical filter elements are bonded together at the slanted sidewalls to form the optical filter array. Light is filtered by illuminating the optical filter array at an angle ? equal to or corresponding to the angle of the slanted sidewalls. In some embodiments the angle of the slanted sidewalls corresponds to the angle-of-incidence ? by Snell's law.

Abstract: A multi-layer photonic structure may include alternating layers of high index material and low index material having a form [H(LH)N] where, H is a layer of high index material, L is a layer of low index material and N is a number of pairs of layers of high index material and layers of low index material. N may be an integer ?1. The low index dielectric material may have an index of refraction nL from about 1.3 to about 2.5. The high index dielectric material may have an index of refraction nH from about 1.8 to about 3.5, wherein nH>nL and the multi-layer photonic structure comprises a reflectivity band of greater than about 200 nm for light having angles of incidence from about 0 degrees to about 80 degrees relative to the multi-layer photonic structure. The multi-layer photonic structure may be incorporated into a paint or coating system thereby forming an omni-directional reflective paint or coating.

Abstract: An optical filter 13 is provided with a quartz plate 2 and a filter group 3. The filter group 3 is constituted by combining a first filter 33 having transmission characteristics in the visible region and one preset band of the infrared region that is contiguous with the visible region, and a second filter 35 and a third filter 36 each having transmission characteristics in the visible region and another preset band of the infrared region that is removed from the visible region and having blocking characteristics in a band between the visible region and the other band of the infrared region. In the second filter 35 and the third filter 36, each of the bands in which blocking characteristics are obtained is approximately 150 nm or less, and the bands in which blocking characteristics are obtained overlap.

Abstract: An optical device including: an optical substrate provided with selective optical filtering element configured to selectively inhibit transmission, through the optical substrate of at least one selected range of wavelengths of incident light in the visible light spectrum at an inhibition rate of at least 5%, the selective optical filtering element being further configured to transmit at least 8% of incident light of the visible spectrum outside the at least one selected range of wavelengths; wherein the at least one selected range of wavelengths has a bandwidth in a range of from 10 nm to 70 nm, preferably 10 nm to 60 nm centered on a wavelength within a range of between 430 nm and 465 nm.

Abstract: An optical body includes a first optical layer having a concave-convex surface, a wavelength selective reflecting layer formed on the concave-convex surface, and a second optical layer formed on the wavelength selective reflecting layer and embedding the concave-convex surface. The wavelength selective reflecting layer selectively directionally reflects light in a particular wavelength band while transmitting light other than the particular wavelength band therethrough. The concave-convex surface is made up of a plurality of triangular pillars arrayed in a one-dimensional pattern, and the triangular pillar has an apex angle ? and a slope angle ?, the apex angle ? and the slope angle ? satisfying a predetermined relationship.

Abstract: An optical device that has an antireflection function, the optical device including: a base; and a plurality of structural bodies, which are formed by convex portions or concave portions, arranged on a surface of the base with a fine pitch that is equal to or smaller than a wavelength of visible light, wherein the plurality of structural bodies are arranged so as to form tracks of a plurality of rows on the surface of the base and form a quasi-hexagonal lattice pattern, a tetragonal lattice pattern, or a quasi-tetragonal lattice pattern, and wherein a packing ratio of the structural bodies to the surface of the base is equal to or higher than 65%.

Abstract: An optical filter device includes a housing including a light passage hole making light incident on the inner side, an aperture on the outer side of the housing and limiting the light made incident on the incident light passage hole, and an interference filter on the inner side of the housing and including a fixed reflection film and a movable reflection film. In a plan view of the fixed reflection film and the movable reflection film, an opening of the aperture, the light passage hole, and the fixed reflection film and the movable reflection film overlap one another. When the diameter of the fixed reflection film close to the light passage hole is ?m, the bore of the light passage hole is ?p, and the opening diameter of the aperture is ?a, ?a<?m<?p.

Abstract: The present disclosure provides an interference filter, a lithography system incorporating an interference filter, and a method of fabricating an interference filter. The interference filter includes a transparent substrate having a front surface and a back surface, a plurality of alternating material layers formed over the front surface of the transparent substrate that form a bandpass filter, and an anti-reflective structure formed over the back surface of the transparent substrate. The alternating material layers alternate between a relatively high refractive index material and a relatively low refractive index material.

Abstract: A broadband partial reflector includes a first multilayer polymeric optical film having a total number of optical repeating units from a first side to a second side of the first multilayer polymeric optical film and a second multilayer polymeric optical film having a total number of optical repeating units from a first side to a second side of the second multilayer polymeric optical film and an intermediate layer on the second side of the multilayer polymeric optical film separates the first multilayer polymeric optical film from the second multilayer polymeric optical film. The first multilayer polymeric optical film has a first baseline optical repeating unit thickness profile and a first apodized optical repeating unit thickness profile monotonically deviating from the first baseline optical repeating unit thickness profile and defining the second side of the first multilayer polymeric optical film.

Abstract: A photonic assembly for observing a preselected color includes an assembly of colloidal particles in a continuous liquid phase, the colloidal particles comprising a core scattering center and a shell layer surrounding the core, wherein the core scattering center is selected to scatter light having a predetermined wavelength, and wherein the shell has a thickness selected to provide an overall colloidal particle size that is about the same dimension as the wavelength of preselected color to be observed.

Abstract: An apparatus for providing pump light of a first wavelength ?1 to a laser that emits a second wavelength ?2 has first and second lasers of the wavelength ?1 to direct light along first and second axes in a first direction. The first and second axes define a first plane P1. To form a composite light beam of wavelength ?1, a filter apparatus has a first filter on a first surface at an oblique angle to the first and second axes and that transmits ?1 and reflects ?2. A second filter on a second surface parallel to the first surface, reflects ?1 and transmits ?2. A third filter formed on the first surface coplanar with the first filter reflects ?1 and transmits ?2. The filter apparatus re-aligns the first and second axes along a second plane P2, orthogonal to P1 and parallel to the first direction.

Abstract: An etalon is provided with a fixed substrate and a movable substrate opposed to the fixed substrate. The fixed substrate is provided with a first bonding surface to be bonded to the movable substrate via a bonding film and a first electrode surface on which a part of the first electrode is formed. The movable substrate is provided with a second bonding surface to be bonded to the first bonding surface via the bonding film and a second electrode surface on which a part of the second electrode is formed. In the state in which the fixed substrate and the movable substrate are bonded to each other with the bonding film, the first electrode formed on the first electrode surface and the second electrode formed on the second electrode surface have contact with each other.

Abstract: A broadband partial reflector includes a multilayer polymeric optical film having a total number of optical repeating units that monotonically increases in thickness value from a first side to a second side of the multilayer polymeric optical film. A baseline optical repeating unit thickness profile is defined by a first plurality of optical repeating units and having a first average slope, and a first apodized thickness profile of the multilayer polymeric optical film is defined by a second plurality of optical repeating units having a second average slope being at least 5 times greater than the first average slope. The second plurality of optical repeating units define the first side of the multilayer polymeric optical film and join the first plurality of optical repeating units. The second plurality of optical repeating units are in a range from 3-15% of the total number of optical repeating units.

Abstract: The invention relates to a transparent or semi-transparent substrate having, over at least a portion of at least one of its surfaces, a photocatalytic coating based on titanium oxide and characterized in that the coated surface has a luminous reflectance less than that of a non-coated surface of the substrate. The invention also relates to methods for obtaining a substrate of this type and to uses for this substrate.

Abstract: The invention generally relates to optical filters that provide regulation and/or enhancement of chromatic and luminous aspects of the color appearance of light to human vision, generally to applications of such optical filters, to therapeutic applications of such optical filters, to industrial and safety applications of such optical filters when incorporated, for example, in radiation-protective eyewear, to methods of designing such optical filters, to methods of manufacturing such optical filters, and to designs and methods of incorporating such optical filters into apparatus including, for example, eyewear and illuminants.

Abstract: An optical filter device has a light interference filter and a casing. The light interference filter has a fixed substrate, a movable substrate joined to the fixed substrate, a fixed reflection film provided on the fixed substrate, and a movable reflection film provided on the movable substrate. The casing has a base substrate and a lid that forms an internal space with the base substrate. The movable substrate has a holding portion provided on a surface opposite to the fixed substrate, outside a light interference region, as viewed in a plan view. The base substrate has a light transmission hole corresponding to a light transmission region. An outer peripheral edge of the light transmission hole faces the holding portion. The surface opposite to the fixed substrate of the movable substrate is joined to the base substrate.

Abstract: Optical apparatus includes an image sensor and an optical assembly, which is configured to focus optical radiation via an aperture stop onto the image sensor. The optical assembly includes a plurality of optical surfaces, consisting of a first, curved surface through which the optical radiation enters the assembly, a final surface through which the rays exit the assembly toward the image sensor, and at least two intermediate surfaces between the first and final surfaces. An interference filter, which has a center wavelength and a passband no greater than 4% of the center wavelength, and includes a coating formed on one of the optical surfaces. All rays of the optical radiation passing through the aperture stop are incident on the coating over a range of incidence angles with a half-width that is no greater than three fourths of the numerical aperture of the optical assembly.

Abstract: The present disclosure describes systems, methods, and apparatus for reducing the frequency and/or severity of photophobic responses or for modulating circadian cycles by controlling light exposure to melanopsin ganglion cells in a retina over the action potential spectrum of the melanopsin cells of the human eye and a visual spectral response of the human eye. Embodiments of an optical filter are described. In one embodiment an optical filter may be configured to transmit less than a first amount of light weighted across the action potential spectrum of the melanopsin cells and to transmit more than a second amount of light weighted across the visual spectral response. Methods of manufacturing optical filters are also described.

Abstract: A multi-band aperture filter for optically coupling to a focal plane array (FPA) of a camera includes a substrate, and a first spectral coating on a first surface of the substrate that passes both a first longer and a second shorter wavelength band. A second spectral coating that passes the longer wavelength band and blocks the shorter wavelength band is on an outer annulus region, but not on an inner region on the first surface or a second surface of the substrate. The second spectral coating provides a larger aperture area for the longer wavelength band as compared to an aperture area for the shorter wavelength band to passively realize different F-numbers for the bands to provide substantially matched beam spot sizes on the detector array for the longer wavelength band and the shorter wavelength band, such as a long-wave infrared (LWIR) band and a mid-wave IR (MWIR) band.

Abstract: An optical filter array includes a substrate permeable to an electromagnetic radiation to be detected, a first DBR mirror arranged on the substrate, a second DBR minor arranged above the first DBR mirror, and a plurality of cavity sections. The cavity sections have different respective optical lengths, and are arranged so as to be spatially separated from each other between the first DBR minor and the second DBR mirror. Each of the first DBR minor, the second DBR mirror, and the plurality of cavity sections with different optical lengths form filter elements of a filter. The filter reflects in a stopband determined by the first DBR mirror and the second DBR mirror. Each filter element has at least one narrow transmission band determined by the optical length of its respective cavity section located inside the stopband. A different thicknesses of the cavity sections is provided via a nanoimprint process.

Abstract: The color reflected by an interferometric modulator may vary as a function of the angle of view. A range of colors are thus viewable by rotating the interferometric modulator relative to an observer. By placing a textured layer between an observer and an interferometric modulator, a pattern which includes the range of colors may be viewed by the observer, and the range of colors may thus be viewable from a single viewing angle.

Abstract: Provided is a structure with an observation port. The structure with the observation port is provided with the observation port and an internal structure. The internal structure is located to the backside of the observation port and has a third reflection preventing film. The first reflection preventing film is a film that reduces reflected light by using light interference. Each of the second and third reflection preventing films has a surface comprising a plurality of convex portions, a distance between apexes of each adjacent two of which does not exceed the visible light wavelengths. Light obtained by combining light reflected by the surface of the first reflection preventing film, light reflected by the surface of the second reflection preventing film, and light reflected by the surface of the third reflection preventing film has a flat wavelength dispersion within the visible light range.

Abstract: An optical filter includes a substrate and a filter film attached on the substrate. The filter film has alternate layers of high reflective layers and low reflective layers to form a plurality of Fabry-Perot resonators. A basic optical thickness of the high reflective layers and the low reflective layers is one fourth a central wavelength (?0/4) of incident ray, and each of the Fabry-Perot resonators has two high reflector films and a spacer between the high reflector films. The spacers in the Fabry-Perot resonator, which is most proximal to the substrate, and in the Fabry-Perot resonator, which is most distal to the substrate, have an optical thickness respectively in a range between four times the basic optical thickness and fourteen times the basic optical thickness.

Abstract: An optical device is provided. The optical device comprises a substrate having a coating region and a non-coating region. A first film is on the coating region, wherein the first film has a band edge structure extending to a portion of the non-coating region with an angle between a surface of the band edge structure and a surface of the first film to diminish the attenuation of an incident light beam.

Abstract: Optical apparatus includes an image sensor and an optical assembly, which is configured to focus optical radiation via an aperture stop onto the image sensor. The optical assembly includes a plurality of optical surfaces, consisting of a first, curved surface through which the optical radiation enters the assembly, a final surface through which the rays exit the assembly toward the image sensor, and at least two intermediate surfaces between the first and final surfaces. An interference filter, which has a center wavelength and a passband no greater than 4% of the center wavelength, and includes a coating formed on one of the optical surfaces. All rays of the optical radiation passing through the aperture stop are incident on the coating over a range of incidence angles with a half-width that is no greater than three fourths of the numerical aperture of the optical assembly.

Abstract: A display includes: a laminated wiring with a conductive film arranged on a foundation layer, and a transparent film and a translucent film arranged on the conductive film; a wiring terminal part arranged at an edge portion of the laminated wiring and having the same laminated structure as that of the laminated wiring; and an insulating film that covers the laminated wiring and the wiring terminal part.

Abstract: An antireflection film capable of reliably preventing light (or laser light), which is incident on a glass substrate and which reaches a metal film, from being reflected by the metal film. The antireflection film provided between a metal film having a complex refractive index represented by NM=nM?i·km and a glass substrate having a refractive index NG includes, from the metal film side: (A) a first dielectric layer having a refractive index N1; (B) a second dielectric layer provided on the first dielectric layer and having a refractive index N2; and (C) a third dielectric layer provided on the second dielectric layer and having a refractive index N3, in which N1<nM, N1>NG, N2<NG, and N3>NG hold. Accordingly, light which is incident on the glass substrate and which reaches the metal film is prevented from being reflected by the metal film.

Abstract: An IR cut filter includes an infrared light absorber to absorb infrared light, and an infrared light reflector to reflect infrared light. The infrared light absorber has a light transmission property of 50% transmittance with respect to a wavelength in a wavelength band of 620 to 670 nm. The infrared light reflector has a light transmission property of 50% transmittance with respect to a wavelength in a wavelength band of 670 to 690 nm. The wavelength with respect to which the infrared light reflector has the 50% transmittance is longer than the wavelength with respect to which the infrared light absorber has the 50% transmittance. A combination of the infrared light absorber and the infrared light reflector provides a light transmission property of 50% transmittance with respect to a wavelength in the 620 to 670 nm wavelength band and less than 5% transmittance with respect to a 700 nm wavelength.

Abstract: A method for making a color image and a color filter manufactured with the method. The color of the color image and the color of the color filter are characterized by resonance features of a Fabry-Perot resonant cavity (100). Through a nanoimprint technology, Fabry-Perot resonant cavities with different thicknesses are manufactured, and the Fabry-Perot resonant cavities with different thicknesses correspond to red, green and blue respectively. The red, green and blue Fabry-Perot resonant cavities are distributed according to the color separation principle, and a combination thereof has the effect of representing a whole image macroscopically.

Abstract: A tamper-proof security element includes at least one polymer spacer layer and two metal cluster layers. One or more of the layers, in addition to their function, fulfills a security feature in their color-shift set-up.

Abstract: According to one embodiment, a display device includes an interference filter including following layers, and a display layer. The first common layer includes first and second regions. The second common layer faces the first common layer. The first spacer layer is provided between the first and second common layers and includes first and second portions facing the first and second regions. The thickness of the first portion is different from the thickness of the second portion. The second spacer layer faces at least one of the first and second portions through the second common layer and is made of the same material as that of the first spacer layer. The coating layer faces the second common layer through the second spacer layer.

Abstract: Embodiments of fluorescent display screens having an intermediate layer between a light-emitting fluorescent layer and an excitation filter layer are disclosed. The intermediate layer includes (1) a low-index layer disposed between the light-emitting fluorescent layer and the excitation filter layer and (2) an index bridging layer disposed between the low-index layer and the excitation filter layer. The insertion of the low-index layer and the index bridging layer according to the above configuration reduces the sensitivity of the excitation coupling to the non-uniformities in the excitation filter layer and variability in the output frequency of the excitation source, leading to improved uniformity of display intensity without significant compromise in the excitation coupling efficiency. A index bridging region made of a hard coat also provides abrasion resistance and provides structure rigidity to the adjacent excitation filter layer.

Abstract: An IR cut filter includes an infrared light absorber to absorb infrared light, and an infrared light reflector to reflect infrared light. The infrared light absorber has a light transmission property of 50% transmittance with respect to a wavelength in a wavelength band of 620 to 670 nm. The infrared light reflector has a light transmission property of 50% transmittance with respect to a wavelength in a wavelength band of 670 to 690 nm. The wavelength with respect to which the infrared light reflector has the 50% transmittance is longer than the wavelength with respect to which the infrared light absorber has the 50% transmittance. A combination of the infrared light absorber and the infrared light reflector provides a light transmission property of 50% transmittance with respect to a wavelength in the 620 to 670 nm wavelength band and less than 5% transmittance with respect to a 700 nm wavelength.

Abstract: A reflective optical element e.g. for use in EUV lithography, configured for an operating wavelength in the range from 5 nm to 12 nm, includes a multilayer system with respective layers of at least two alternating materials having differing real parts of the refractive index at the operating wavelength. The material having the lower real part of the refractive index is a nitride or a carbide. “Alternatively, the material having the lower real part of the refractive index is thorium, uranium or barium and the material having the higher real part of the refractive index is boron or boron carbide.

Abstract: A near-infrared (NIR) optical shutter comprises a multiple-bandpass filter that is characterized by a bandstop filter region located between first and second bandpass filter regions. The first bandpass filter region passes visible light; the bandstop filter region blocks NIR light of wavelengths within a NIR light sensor band region; and the second bandpass filter region passes NIR light of longer wavelengths than a longer wavelength boundary of the NIR light sensor band region. A polarization state changer positioned between NIR polarizing filters and optically associated with the multiple-bandpass filter causes visible light transmission selectively in first and second light states. The polarization state changer in the first light state causes substantially reduced optical shutter transmission of NIR light in the second bandpass filter region and in the second light state causes substantially increased optical shutter transmission of NIR light in the second bandpass filter region.

Abstract: A multilayer photonic structure may include a plurality of coating layers of high index dielectric material of index of refraction nH and a plurality of coating layers of low index dielectric material of index of refraction nL alternately arranged with a first coating layer and a last coating layer of the multi-layer photonic structure comprise low index material. An index-thickness of each coating layer of the multilayer photonic structure is different than every other coating layer of the multilayer photonic structure. The multilayer photonic structure has a first high reflectivity bandwidth, a second high reflectivity bandwidth and a low reflectivity bandwidth wherein the low reflectivity bandwidth is positioned between the first high reflectivity bandwidth and the second high reflectivity bandwidth.

Abstract: A display device is applied to a light sensing system. The display device includes a display module and a pattern layer. The pattern layer is made of optical material capable of either fully or partially reflecting or absorbing invisible light of specific wavelength emitted from the display module, and is formatted on the display module, thus defining gaps through which invisible light can pass. A light sensor is utilized to sense the pre-determined pattern defined by the invisible light passing through the pattern layer. Based on the light sensing result, the light sensor can recognize the corresponding pattern. The optical material of the pattern layer may be arranged to incorporate locational varying invisible light transmittance to define the pre-determined pattern at a finer degree, thus further increasing sensing accuracy.

Abstract: An optical multilayer band pass filter includes a substrate transparent, an LWPF part provided only on one side of the substrate, which forms a rise portion and a reflection band on a shorter wavelength side, an SWPF part, which forms a fall portion and a reflection band on a longer wavelength side, and a polarization dependency improvement part, which controls split-up between a P-wave and a S-wave occurring in the rise portion and the fall portion formed respectively by the LWPF part and the SWPF part when the subject light is incident obliquely. The LWPF part, the SWPF part, and the polarization dependency improvement part have a structure in which a plurality of higher refractive index layers made of a first dielectric material and a plurality of lower refractive index layers made of a second dielectric material having a refractive index lower than the first dielectric material are deposited alternately.

Abstract: The heat reflecting arrangement with an improved high heat resistance, e.g. 100 hours at 500° C., includes a substrate, a heat reflecting layer (A) on at least one side of the substrate, which contains indium tin oxide (ITO), and a barrier layer (B) that covers the heat reflecting layer (A), which contains a metal oxide and/or a metal nitride. A fireplace or baking oven with a viewing window having this layer system with the heat reflecting layer is also described. In addition a process for providing the heat reflecting arrangement is described.

Abstract: Optical bodies are disclosed that include an optical film and at least one rough strippable skin layer. The at least one rough strippable skin layer can include a continuous phase and a disperse phase. In some embodiments, the at least one rough strippable skin layer can include a first polymer, a second polymer different from the first polymer and an additional material that is substantially immiscible in at least one of the first and second polymers. In some exemplary embodiments, a surface of the at least one rough strippable skin layer adjacent to the optical film comprises a plurality of protrusions and the adjacent surface of the optical film comprises a plurality of asymmetric depressions substantially corresponding to said plurality of protrusions. Methods of making such exemplary optical bodies are also disclosed.

Abstract: Multi-spectral filter elements and methods of formation are disclosed. Each multi-spectral filter element may include a plurality of sub-filters that are, in some embodiments, each adapted to respond to electromagnetic radiation within respective ones of a plurality of spectral bands. A method embodiment includes forming an optical cavity layer. Volume of the optical cavity layer can be reduced in at least N?1 number of spatial regions. The reducing may include a number of selective removal steps equal to the binary logarithm function Log2 N. In this example, each spatial region corresponds to a respective one of the plurality sub-filters. The plurality of sub-filters include at least N sub-filters. In particular embodiments, the respective ones of the plurality of spectral bands may be at least partially discrete with respect to each other.

Abstract: A broadband mirror, polarizer, or other reflector includes separate stacks of microlayers. Microlayers in each stack are arranged into optical repeat units, and the stacks are arranged in series. At a design angle of incidence such as normal incidence, the second stack provides a second 1st order reflection band and a distinct second 2nd order reflection band with a second spectral pass band therebetween. The first stack provides a first 1st order reflection band that fills the second spectral pass band such that a single wide reflection band is formed that includes the first 1st order reflection band, the second 1st order reflection band, and the second 2nd order reflection band. In some cases, the single wide reflection band can include a first 2nd order reflection band of the first stack. In some cases, the first and second stacks may have apodized portions which monotonically deviate from respective baseline portions.

Abstract: A solar element with increased efficiency and also a method for increasing the efficiency of a solar cell are provided. The solar cell comprises a luminescent element, an upconverter, and also at least one selectively reflecting structure.

Abstract: An optical filter is provided which includes a plurality of hard coating layers of alternating high and low refractive index provided on a substrate and has an associated first transmission band. The filter also includes at least one additional plurality of hard coating layers including high and low refractive index layers and Herpin equivalent layers sandwiched therebetween. The additional plurality of layers has an associated second transmission band that substantially coincides with the first transmission band, but provides additional blocking at wavelengths outside the first transmission band. Relatively wide transmission bands and high blocking over an extended range of wavelengths can be achieved such that the filter is suitable for use in multiphoton fluorescence systems.