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Topic: Prismatic surface

In the News (Tue 21 May 13)

EXECUTIVE POWER

Iran

ANALYSIS

Pakistan

Family compact

	Illumination cover for fluorescent lamp - Patent 5274536
		In order to obtain the phenomenal result the distance L from the inner surface of the transparent prismatic diffuser plate has to be selected with reference to the size of the prismatic projections, the refractive index thereof and the size of the diameter of the fluorescent light 7.
		This prismatic diffuser surface 3 is uneven but it does not gather dust and dirt as generally gathered by known molded covers having a coarse surface.
		The prismatic diffuser surface 3 utilized in the present invention has a large number of molded triangular pyramids 10 on the outer surface of the transparent diffuser plate 2 made of molded synthetic resin.
	www.freepatentsonline.com /5274536.html (1459 words)

	Main
		Surface of revolution defined by the rotating motion of any type of line (straight, broken, curved) around a straight line of axis found outside of the curve.
		Surface created by the motion of any kind of line that is parallel to a fixed plane and is bound by two skew lines.
		Surface created by the motion of a line a long the path of a helix, at a constant angle with the axis of the helix.
	www.core77.com /forj/elem_plane.html (230 words)

	Insulated shipping container - Patent 5897017
		In one embodiment of the container the remainder of the exterior surface of the container is faced with a separate sheet of plastic, and the two pieces of plastic cooperate to define an escape slit at which excess foamed polymer material escapes during formation of the container in a fixture.
		Across the bottom surface of the container 10 (i.e., the outer surface 30" of wall 30 opposite to opening 20) a separate sheet 48 of un-foamed polymer sheet material is integrally bonded, and defines edges 48' adjacent to the edges 46.
		Disposed upon the upper surface 54 is a prismatic plug member 62 matching in shape and size the chamber 18 of lower portion 14 of container 10.
	www.freepatentsonline.com /5897017.html (5002 words)

	DESCRIPTIVE CRYSTAL HABITS
		Prismatic crystals are "pencil-like", elongated crystals that are thicker than needles (see acicular).
		The result on prismatic crystals is a shape that appears like a jeweled royal scepter of kings and queens.
		A branching growth of crystals usually on a surface or as an inclusion that forms plant-like patterns similar to "Jack Frost" on windows and similar to arborescent, but less tree-like.
	mineral.galleries.com /minerals/property/habits.htm (1339 words)

	Hybrid Prismatic-Cartesian Grids (Site not responding. Last check: 2007-11-04)
		Since these surface grids are often built purely with geometric criteria, these requirements can lead to problems where either the near-surface grid is under-resolved (perhaps a feature like a shock-wave goes through a coarser-grid region), or large regions of over-resolved surface grid that result in a much denser grid than necessary and swamp the computation.
		in [32] presents an alternative which couples the surface grid determination to the adaptation process and allows each original surface prism to be split recursively in an octree framework (each triangle is bisected, leading to four prisms, which are then divided in half, yielding eight children from one cell--an octree).
		Extrude the surface facets into prisms along those normal vectors to build a ``new surface.'' Tag each new surface facet with an encoded pointer referring to the appropriate outer layer cell (to be used later to build the grid connectivity information needed by the flow solver).
	www.engin.umich.edu /org/cfd/users/charlton/Thesis/html/node38.html (1093 words)

	U.S. Patent: 5007220 - Non-periodic and periodic layered space frames having prismatic nodes - April 16, 1991
		As used herein, a prismatic node means a node which is shaped as a prism and comprises top and bottom faces which are identical regular polygons with p sides, and p rectangles or squares forming side surfaces interconnecting the top and bottom surfaces.
		Each of the side surfaces is coupled to the top and bottom surfaces and is coupled to the two side surfaces on the opposite edges thereof, forming a continuous outer surface.
		25, a tiled, continuous surface 148 is shown comprising tiles 149 and 150 where the tile edges 151 are defined by strut locations in accordance with the invention and the vertices 152 between the edges 151 are defined by prismatic node locations in accordance with the invention.
	www.everypatent.com /comp/pat5007220.html (5539 words)

	Prismatic and pyramidaI surfaces (Site not responding. Last check: 2007-11-04)
		Tangent plane to the pyramidal (prismatic) surface in the point L not located on the edge coincides with the surface face, in which the point is located, normal n is perpendicular tot the tangent plane.
		, in a general position with respect to the prismatic surface, intersets the surface in the polygon with edges in the intersection points of the surface edges and the intersection plane.
		planar intersection of the prismatic surface with four edges and the basic polygon in frontal plane is mapped in the axial affinity.
	www.km.sjf.stuba.sk /Geometria/PREDNASKY/prism-pyramid.htm (765 words)

	Prismatic Sphere :: d20srd.org (Site not responding. Last check: 2007-11-04)
		This spell functions like prismatic wall, except you conjure up an immobile, opaque globe of shimmering, multicolored light that surrounds you and protects you from all forms of attack.
		The colors of the sphere have the same effects as the colors of a prismatic wall.
		Prismatic sphere can be made permanent with a permanency spell.
	www.d20srd.org /srd/spells/prismaticSphere.htm (230 words)

	Preservation Tech Notes, Historic Glass Number 1, Repair and Reproduction of Prismatic Glass Transoms
		Introduced in the 1890s, prismatic glass transoms were a popular and practical means of directing daylight into building interiors.
		With origins in sidewalk vault lights and glass panels used on ship decks, prismatic tiles had ridges or other raised patterns on their inside surface that refracted sunlight toward the rear of a building.
		Prismatic glass tiles were used both in new construction and to update existing storefronts, until changing tastes and the dominance of electricity led to their functional obsolescence by the 1930s.
	www.cr.nps.gov /hps/tps/technotes/PTN44/intro.htm (602 words)

	JAIC 1993, Volume 32, Number 3, Article 6 (pp. 279 to 290)
		Thus, in principle, through the combination of reflections from the smooth inner surface of the film and the prismatic surface at the back of the film, light from the source is totally internally reflected as it passes, with repeated reflections, down the length of the pipe (Saxe et al.
		So that the light can pass through the pipe with a minimum number of surface reflections from the prismatic film and, hence, minimum attenuation, the rays from the source entering the end of the illuminator must strike the surface of the prismatic film at an angle of incidence of 60° or greater.
		By increasing the angle at which the ray hits the prismatic film, this film acts as an “extractor,” redirecting light rays and causing them to scatter at different angles, as shown in figure 9, roughly doubling the amount of transmitted, or leaked light (Saxe 1989).
	aic.stanford.edu /jaic/articles/jaic32-03-006_5.html (1780 words)

	Diaphanarch \| Architecture and Design \| Sabine von Fischer
		Prismatic Space derives both from a modernist notion of gradual transparencies and from the contemporary dystopia of 'white space' parole.aporee.org.
		In the Prismatic House there are small spaces in which to read and sleep; corners in which to work, large open spaces in which thoughts can float.
		The Prismatic House is enclosed with a folded glass wall; all these spaces unfold from a surface that fractures the views across the interior.
	www.diaphanarch.ch /2.0_projects/prismaticspace.html (188 words)

	Fensterscheibe
		The prismatic structure has to be sufficiently precise and isomorphic, the prism angles have to be equal to their nominal values with an accuracy of at least ±0.3° and the surface roughness of the prismatic surfaces has to be as low as possible.
		The prismatic ribs of such a pane, however, cannot be recognized anymore by human eyes from a distance of 1m or greater.
		As in this case the light rays have to penetrate 6 surfaces instead of 4 surfaces, the light transmittance of the double glazing unit with prismatic film within the intermediate space is slightly lower than that of the double glazing unit with bonded prismatic film.
	www.lorenz-prismenglas.de /en/einprien/embodiments.htm (1217 words)

	Item 621 Raised Pavement Markers
		The prismatic retroreflector shall be attached to the casting prior to installation or after the adhesive in the pavement slots has cured.
		The pavement surface temperature and the ambient air temperature shall be at or above 5 C (40 F) at the time of application of the prismatic retroreflector.
		Prismatic retroreflectors will be measured as the actual number, complete in place, for use on Department furnished castings or on existing RPM castings in the pavement, and accepted.
	www.dot.state.oh.us /spec/621.htm (1154 words)

	Role and functional anatomy of the endometrium
		layered prismatic surface epithelium, penetrating into the underlying connective tissue and thus forming tubular glands (glandulae uterinae).
		The endometrium consists of a single-layered prismatic epithelium with or without cilia (depending on how far along the menstruation cycle is) and its basal lamina, uterine glands, and a specialized, cell-rich connective tissue (stroma) containing a rich supply of blood vessels.
		In the inset, the cells of the single layered prismatic epithelium, the basal lamina and the blood vessels are shown enlarged.
	www.embryology.ch /anglais/gnidation/role01.html (466 words)

	Glossiness.... shine (Site not responding. Last check: 2007-11-04)
		Reflection of a matt surface is dull but stable, which implies that the material has a reliably constant degree of shine, regardless of the nature of the incident light and the position of the observer.
		The structure of an iridescent surface causes a beam of incident light to be split into several beams of light of different wavelengths and so colours.
		An image printed as a prismatic surface using microscopically thin coloured lines changes according to the angle from which it is viewed.
	www.materialexplorer.com /104.0.html (1007 words)

	1
		35: The inclination angle w of the longitudinal axis of the prismatic ribs relative to the horizontal line within the window plane for a window tilt angle n=90° and the geographical latitudes l=40°, l=50° and l=60° in dependence on the azimuth angle a of the window.
		36: The inclination angle w of the longitudinal axis of the prismatic ribs relative to the horizontal line within the window plane for a window inclination angle n=60° and the geographical latitudes l=40°, l=50° and l=60° in dependence on the azimuth angle a of the window.
		However, a satisfying clear view through the system can be expected only, if the prismatic panes A and B are manufactured with sufficient accuracy and if all the single prismatic surfaces are smooth and plane.
	www.lorenz-prismenglas.de /en/dopprien/basis.htm (1785 words)

	Infiltration and Surface Geometry Features of a Swelling Soil following Successive Simulated Rainstorms -- Wells et al. ...
		The physical surface data were measured in Exp. A and the penetration depths in Exp.B. The mean prism dimension and mean crack depths and widths were measured after the drying time shown, and provide the initial condition for the subsequent rainstorm.
		The solid line represents the laser elevation of the soil surface before the rainstorm, the circular symbols represent the elevation of the soil surface immediately after the rainstorm, before penetration, and the diamond symbols represent the final position of the penetrometer immediately after the rainstorm, after application of the 500-g load.
		The prismatic column size increased to 10 cm, but the position of the prismatic columns and the cracking pattern is similar to Fig.
	soil.scijournals.org /cgi/content/full/67/5/1344 (4134 words)

	Intersections of elementary surfaces (Site not responding. Last check: 2007-11-04)
		Intersections of these lines on one surface and related edges on the other one, all located in one of the auxhiliary vertex plane are vertices of the intersection polygon.
		Orthogonal axonometric view of the total intersection of the conical surface of revolution and cylindrical surface of revolution is illustrated in obr.
		Intersection of sphere and pyramidal or prismatic surface is a curve composed from circular arcs,
	www.km.sjf.stuba.sk /Geometria/PREDNASKY/eleminter.htm (1619 words)

	Microsharp Corporation Limited: Prismatic Films (Site not responding. Last check: 2007-11-04)
		Prismatic film reflects glare away from principle viewing angle by shifting the specular reflection spot significantly away from the viewing direction.
		Prismatic materials play an important role in many backlight designs, serving to correct the direction of light from a side light through a display.
		By using both vertical and horizontal prismatic films, light from the backlight can be collimated into a narrow range of directions, thereby significantly enhancing display brightness.
	www.microsharp.co.uk /products/prismatic-films (273 words)

	Light Pipe Technologies
		In such a guide, the inner surface of a cylindrical tube is with a metallic coating so that light rays in the guide undergo a reflection each time they reach the inner surface and propagate down the guide.
		However, even with a highly polished surface with 95% reflectance, for instance, the 5% attenuation of the light associated with each metallic reflection is sufficient to cause severe attenuation as the light propagates along the guide.
		In a practical prism light guide, the main loss is due to bulk absorption and scatter in the material from which the microstructures are made and surface roughness and optical imperfections of the prismatic structures.
	www.physics.ubc.ca /ssp/research/lightpipe.htm (806 words)

	Faux Painting, Decorative Painting Classes
		Basecoat your surface with any flat or eggshell paint in a light value of either latex or oil-based paint.
		Trowel on a heavy-bodied medium that won't run or sag on the surface after the stencil is removed.
		While the paint is wet (you can mist your surface with water before and during this step to keep your paint wet), crosshatch the mid-value color into the darker value then down another one-third of the area.
	www.prismaticpainting.com /AztecSun2.lasso (639 words)

	Polarized illumination system for LCD projector - US Patent 5995284 (Site not responding. Last check: 2007-11-04)
		A novel variation of this method is used in the current invention by forming a positive cylinder Fresnel lens 46 in the exit surface of the spatial integrator cell 48, as shown in FIG.
		The incident beam, having an AR=2:1 is converted to an output beam with an AR=4:3 by specifying the tilt angle φ and the prism wedge angle α.
		The prism deviation angle δ is 60°, and the entrance angle for the 60° linear microprismatic elements 80 and 82 is 60°.
	www.patentstorm.us /patents/5995284-description.html (3044 words)

	[No title] (Site not responding. Last check: 2007-11-04)
		The prisms are generated in close proximity to the body surface to discretize the viscous region, while tetrahedra tesselate the inviscid region.
		This grid, covering the body surface, is marched away from the body in distinct steps, resulting in the generation of semi-structured prismatic layers in the marching direction.
		The goal of the marching scheme is to reduce the curvature of the previous marching surface at each step while ensuring smooth grid spacing to avoid surface overlap.
	home.austin.rr.com /khawaja/thesis.html (371 words)

	Magfrenl.len - A Fresnel diffractive magnifier
		A Fresnel surface in OSLO is one that has the power of a curved surface, but is actually placed on a substrate having a different curvature (usually flat).
		This is accomplished by dividing the surface into prismatic zones, so that the surface normal approximates that of the curved refracting surface at any point.
		A diffractive surface is outwardly similar to a Fresnel surface, but there is an important difference between the two: With a Fresnel surface, light from different zones combines incoherently, while with a diffractive surface, light from different zones combines coherently.
	www.sinopt.com /software1/usrguide54/examples/magfrenl.htm (320 words)

	VOB Lumex -- Single Surface Elements
		Origin of internal Coordinate system of the Cylindrical Surface is placed on the surface at the geometry center of External boundaries of Clear Aperture (while eccentricity is set to zero).
		Parabolic Surface is a special case of Quadric Surface with squared eccentricity coefficient ex2 equal to unit value (1).
		Note origin of internal Coordinate System is placed on the axis of quadric surface but at the plane consisting outer borders of Element (in contrary to usual Quadric Surface having it at the top surface point).
	www.tecplusplus.de /ManualLu/elements_single_surface.htm (5262 words)

	Rechargeable Prismatic Li-Ion Cells for device designers from PowerStream
		Prismatic lithium cells have a better form factor than cylindrical cells for a variety of applications, such as cell phones, PDAs, cameras.
		Prismatic cells were designed to be used with wire leads.
		prismatic lithium ion cells, prismatic battery cells, li-ion prismatic cell
	www.powerstream.com /liprism.htm (436 words)

	Surface Mount Fluorescent Fixtures for commercial applications (Site not responding. Last check: 2007-11-04)
		This surface mounted unit is ideal for use in commercial, residential and institutional areas.
		Lens is clear non-yellowing acrylic with prismatic #12 pattern for even light distribution.
		Units are equipped with knockouts and holes for surface or pendant mounting.
	www.costlesslighting.com /acatalog/Catalog_Surface_Mount_13.html (165 words)

	Mineral ID_Key
		It is simply a protractor with an adjustable arm on it that is used to lay along one cleavage surface while the base of the protractor is laid across another.
		Prismatic — elongated with opposite faces parallel to one another, in which case they may be short and stout, or long and thin.
		Iridescence is similar to opalescence except that it is usually associated with metallic minerals and surface reflections rather than glassy minerals and sub-surface reflections: An exception is the type of iridescence known as labradoresence or schiller, found in labradorite and a very few other minerals.
	www.rockhounds.com /rockshop/mineral_id (8421 words)

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