2206 results about "Optical thin film" patented technology

A method for optically coupling a thermoplastic material to an outer surface layer of an organic, dielectric, optical film and the resulting optical filter. Initially, a dielectric film is selected that includes (i) repeating optical layers of at least two polymers having different refractive indexes from each other, (ii) an exterior film surface, (iii) a refractive boundary along the exterior film surface, and (iv) a delamination threshold based on total thermal energy delivered to the film. A thermoplastic material which is miscible with the exterior film surface is fused to the refractive boundary with thermal energy below the delamination threshold to form a polydisperse region having a higher optical transmission than the refractive boundary. Add-on filters in the form of hardcoat layers, anti-reflection layers, holograms, metal dielectric stacks and combinations of these may be combined with the thermoplastic-film construct.

The interferometric modulator of the invention includes a transparent substrate (refractive index: n0) 12, an optical thin film (complex index of refraction: N1=n1−i·k1) 13 provided on the transparent substrate 12, and an absorber layer (complex index of refraction: Ns=ns−i·ks) 14 opposed to the optical thin film 13, the distance of a gap to the optical thin film 13 being variable, wherein the relation n1>n0, k1≅0 and ns>n0 is satisfied.

The present invention introduces a new class of thin doubly collimating light distributing engines for use in a variety of general lighting applications, especially those benefiting from thinness. Output illumination from these slim-profile illumination systems whether square, rectangular or circular in physical aperture shape is directional, square, rectangular or circular in beam cross-section, and spatially uniform and sharply cutoff outside the system's adjustable far-field angular cone. Field coverage extends from + / −5- to + / −60-degrees and more in each meridian, including all asymmetric combinations in between, both by internal design, by addition of angle spreading film sheets, and angular tilts. Engine brightness is held to safe levels by expanding the size of the engine's output-aperture without sacrifice in the directionality of illumination. One form of the present invention has a single input light emitter, a square output aperture and the capacity to supply hundreds of lumens per engine. A second multi-segment form of the invention deploys one light emitter in each engine segment, so that total output lumens is determined by the number of segments. Both types of thin light distributing engines provide input light collimated in one meridian and a light distributing element that maintains input collimation while collimating output light in the un-collimated orthogonal meridian, in such a manner that the system's far-field output light is collimated in both its orthogonal output meridians. The present invention also includes especially structured optical films that process the engine's doubly collimated output illumination so as to increase its angular extent one or both output meridians without changing beam shape or uniformity.

The invention relates to a light redirecting polymeric film comprising a plurality of polymeric individual optical elements wherein the elements comprise curved wedge shaped features in the plane of the film, having a length in the range of 800 to 4000 micrometers.

Multilayer optical films are comprised of materials with glass transition temperatures below room temperature (<30° C.). The high refractive index polymers are unique in that they exhibit mechanical properties similar to other low Tg semi-crystalline polymers, yet have significant birefringence (>0.05) when strain induced oriented. Novel combinations of comonomers for thermoplastics control the rate of crystallinity for improved processability and flexibility, giving the films crease and crumple recovery advantages.

The present invention provides a method for producing an optical film exhibiting excellent optical characteristics and film strength with high productivity in a production method of an optical film including a step of irradiating polarized ultraviolet rays. The method for producing an optical film is characterized in that it is a method for producing an optical film comprising the following steps (1) to (3) in the order of (1) to (3): (1) A layer composed of a polymerizable composition containing a polymerizable liquid crystal compound and a dichroic polymerization initiator is formed on the surface; (2) the molecules of the polymerizable liquid crystal compound in the layer are formed into a first alignment state; (3) The layer is irradiated with polarized ultraviolet rays to polymerize the polymerizable liquid crystal compound, and fix the molecules of the polymerizable liquid crystal compound in the second alignment state to form an optically anisotropic layer. Exposure to area (J / cm 2 ), the proportion of polarized ultraviolet rays with an extinction ratio of 1 to 8 is 15% or less.