Abstract: The present invention relates to a focal plane array having a substrate wafer; an n-type indium arsenide layer disposed atop the substrate wafer; a barrier layer disposed atop the substrate wafer; and a doped n-type layer disposed atop the barrier layer. The present invention further relates to a focal plane array, having a substrate wafer; an n-type indium arsenide layer disposed atop the substrate wafer; and a p-type indium arsenide layer positioned at a first surface of the n-type indium arsenide layer opposite an interface surface of the n-type indium arsenide and the substrate wafer.

Abstract: An optical element includes an optical block constructed of a first material having a % transmission of at least 50% throughout a spectral range of 300 nm to 2700 nm through at least a thickness of the optical block. The optical block comprises a surface. A grating layer constructed of a second material is disposed on the surface of the optical block, the grating layer comprising a first surface that is directly in contact with the surface of the optical block and a second surface comprising a plurality of diffraction features forming a diffraction grating.

Abstract: Prepared substrate comprising an array of cube corner cavities and protrusions interspersed between the cube corner cavities.

Abstract: The invention provides pressure-sensitive adhesive (PSA) coated articles, including tapes and transfer coatings, having microstructured surfaces and methods of making pressure-sensitive adhesive articles bearing such microstructured surfaces. The performance properties of the pressure-sensitive adhesive articles can be tailored by independently varying the microstructure and the rheological properties of the pressure-sensitive adhesive.

Abstract: A process for making molds for retroreflective sheeting and like articles includes making a substrate having a structured surface of geometric structures such as cube corner elements. The structured surface is in one embodiment partially replicated from a previous generation structured surface, and partially machined in the substrate. At least one of the faces of the structured surface is a compound face that has one machined portion and one non-machined portion, such as a replicated portion. The process can be used to manufacture substrates with desirable geometry cube corner elements, such as cube corner elements having a hexagonal outline in plan view, without requiring the use of pin bundling techniques or laminae. The process can also be used to manufacture articles having cube corner elements in which at least one face of the cube corner element has two constituent faces disposed on opposed sides of a transition line that is nonparallel to a nondihedral edge of such cube corner element.

Abstract: The present invention relates to a method for making a substantially cylindrical tool from a substantially planar substrate, wherein the tooling has at least one patterned surface. The resulting tooling includes a patterned surface with a sufficiently strong weld that is capable of producing an article having a pattern surface that has a relatively narrow and preferably cosmetically pleasing seam line. Such articles include retroreflective sheeting, structured abrasive articles, adhesive articles suitable for use in personal care products, and the like.

Abstract: Retroreflective sheeting includes a body layer having a structured surface with recessed faces forming cube corner cavities. A reflective film is disposed at least on the recessed faces, and a fill material fills the cube corner cavities. The fill material comprises radiation-curable materials, adhesives, or both, and preferably transparent radiation-curable pressure-sensitive adhesives. The fill material preferably forms a continuous layer covering both the recessed faces and upper portions of the structured surface. A transparent cover layer preferably contacts the fill material layer.

Abstract: The invention provides pressure-sensitive adhesive (PSA) coated articles, including tapes and transfer coatings, having microstructured surfaces and methods of making pressure-sensitive adhesive articles bearing such microstructured surfaces. The performance properties of the pressure-sensitive adhesive articles can be tailored by independently varying the microstructure and the rheological properties of the pressure-sensitive adhesive.

Abstract: A structured surface articles such as molds or sheeting are formed on a compound substrate including a machined substrate and a replicated substrate. In one embodiment, the structured surface is a cube corner element on a compound substrate. In another embodiment, the structured surface is a geometric structure that has a plurality of faces, where one face is located on the machined substrate and another face is located on the replicated substrate. In yet another embodiment, at least some of the faces include a compound face with a portion formed on the machined substrate and a portion formed on the replicated substrate.

Abstract: The novel umpire tool generally comprises a plate of durable material, the plate defining a hole therethrough. The umpire tool can be used for determining a bat's diameter in relation to an upper limit, typically set by a governing association or rule promulgator. Therefore the diameter of the hole defined within the durable plate is closely sized to the upper limit. A plate brush may be integrally provided so that the umpire tool can also be used to clean home plate. Similarly, a scraper may be integrally provided to clean mud and the like from home plate. Further, an insert may be provided for reducing the diameter of the hole and for measuring a bat's diameter in relation to a second different upper limit.