Abstract: The electric lamp with reflector has a concave reflecting surface of a rotationally-symmetric general shape, onto which flat four-sided facets are superimposed which are tangent to the general shape. The facets each illuminate a rectangular field in a plane perpendicular to the optical axis of the reflector, which fields are of equal shape and size and have the same orientation. Thereby, the electric lamp with reflector is able to illuminate a rectangular field with a high degree of uniformity and of efficiency. The electric lamp with reflector may be used in an image-projection apparatus.

Abstract: The headlight comprises a light source, a reflector having a base surface that is selected to form images of the source in a determined distribution in a lighting direction that is axial and horizontal, and a closure glass. According to the invention, the closure glass is essentially free from deflecting stripes and the reflector includes, over at least a portion of its surface, a plurality of zones in which said base surface is replaced by substitution surfaces of outlines defined by projecting a plane array of polygonal zones onto the base surface, the plane array being defined as a function of a predetermined distribution of light flux. The array of zones corresponds to the array that would have been obtained if it had been an array of stripe zones formed on the closure glass, and the differential offset in a horizontal plane between the base surface and each substitution surface corresponds to the profile that the corresponding stripe would have had if it had been formed on the closure glass.

Abstract: The lighting apparatus including a cathode tube, a photoconductive member to which light from the cathode tube is conducted through an edge surface thereof, and reflecting means for reflecting the light from the cathode tube toward the edge surface of the photoconductive member. The reflecting means has on the inner surface thereof reflecting mirrors which are made of silver and arranged at uniform intervals. With this structure, even when the reflecting means and the cathode tube are disposed close to each other, it is possible to prevent a leakage current from flowing from the cathode tube to the reflecting mirrors because the reflecting surfaces are separated from each other. This stops the leakage current from lowering a driving current of the cathode tube, and it is therefore possible to maintain high light emitting efficiency in the cathode tube. Moreover, since silver is used for the reflecting surfaces, reflecting efficiency of the reflecting means is maintained.

Abstract: The luminaire has a concave reflector (1) built up from plane facets (4). The facets are arranged in rows (7) which extend between first parallel planes (8) towards the light emission window (3). The facets are also bounded by second parallel planes (9). The first and the second parallel planes extend parallel to the axis (2) of the reflector, but transversely to one another. A lamp holder is (30) 204 present for holding an electric light source (31') in a plane transverse to the plane of symmetry (6) of the reflector. The luminaire is suitable for concentrating the light generated by the light source into a comparatively wide beam and for illuminating a field from a small distance with a high degree of homogeneity.

Abstract: A ceiling mounted, recessed, wallwash light fixture includes a reflector having an internal reflecting surface. A wallwash segment of that reflecting surface is defined by vertically adjacent reflecting faces each arranged so that an effective lowest point of brightness seen by the reflecting face is reflected along a line passing below an opposing portion of a bottom edge of the reflector. The wallwash segment can be defined by an insert attached to the reflecting surface.

Abstract: The improved projector type headlight according to the present invention comprises a reflector having two focuses, an HID bulb of which the discharging portion is located near the first one of the two focuses, and a convex lens which converges and projects rays of light emitted from the HID bulb and reflected by the reflector. Many fine concavities or convexities are formed over, or on a portion of, the effective reflecting area of the reflector. The HID bulb is advantageous in that it is small but provides a large amount of light. However, it emits locally colored rays light as will be evident from detailed observation of the discharging portion thereof. Such colored rays of light are appropriately scattered and mixed together due to reflection by the light diffusing surface having many fine concavities or convexities formed thereon, with the result that the reflected rays of light are almost whitened. Thus, the colored rays of light are little sensed by the human eyes.

Abstract: A multi-faceted light reflector has a reflecting surface with a plurality of adjacent facets, a light source placed in a predetermined spatial relationship to the reflecting surface, and an image surface placed in a predetermined spatial relationship to the light source and the reflecting surface. Each facet has a plurality of edges bounding each facet with each edge joining an edge of an adjacent facet to define a common edge between the two adjacent facets. The surface of the facet generally has three curvature regions. The first region is a base curvature surface portion formed in a predetermined relation to the light source and the image surface for illuminating a predetermined first area of the image surface. The second region is an edge curvature surface portion of each facet adjacent the edges for illuminating a second area of the image surface displaced in predetermined angular relation to the base portion.

Abstract: A light apparatus is provided for illuminating a subject with "soft light", i.e., diffused light that does not cast a defined shadow. The apparatus includes lamp holder (16), a lamp (14), a reflector (12) for reflecting light from the lamp towards the subject, a diffuser or a baffle (23) located in front of the lamp for preventing light from the lamp from passing directly onto the subject. The reflector has a reflecting surface at least 500 mm in diameter and composed of a plurality of convex light-reflecting elements less than 20 mm in diameter. The light reflecting elements (28) constitute at least 90% (by area) of the reflecting surface.

Abstract: A combination of a prismatic reflector and a prismatic lens is provided for use with lighting fixtures. A reflector body has a substantially parabolic contour defining an interior cavity. The reflector body includes a plurality of prisms for receiving, transmitting and reflecting light. A lens body has a first mating surface engaging the reflector body, an opposed inverted conical surface, and a sloping sidewall extending between the mating surface and the opposed inverted conical surface. The mating surface of the lens body has a larger diameter than the opposed inverted conical surface. The opposed inverted conical surface includes a plurality of prisms for receiving and for redirecting light.

Abstract: A light collector which includes a light pipe having a face with a center and a diameter. The light pipe also has a predetermined acceptance angle. The light source is located a predetermined distance from the light pipe positioned on a line perpendicular to the center of the face of the light pipe. A concave surface defined by a plurality of ellipsoidal sections having a common first focus and a common second focus is used to reflect light from the light source to the light pipe. The ellipsoidal section have decreasing eccentricities with increasing object angle along the concave surface. The light source is located substantially at the first focus of the plurality of ellipsoidal sections and the center of the face of the light pipe is located substantially at the second focus. The surface has an eccentricity such that light rays emitted from the light source reflected by the surface to the light pipe do not exceed the acceptance angle of the light pipe.

Abstract: An attractive displaying device whereby an ultraviolet radiation lamp, which is hidden from plain view, contains a transparent tube that coaxially receives the ultraviolet lamp and which is rotatable about an axial center line. Images are painted or printed on either the outer surface of the ultraviolet lamp, or on a substantially transparent film placed over the surface of the transparent tube, with a fluorescent ink which emits light when ultraviolet light is radiated upon it. The lighted images are projected onto a concave reflective surface, which may also have images painted on it with a fluorescent ink. The rotatable tube allows for movement of the images against the reflective surface; and a three dimensional effect can be achieved by making it look as if the projected images are passing behind the images that are painted on the reflective surface. The display unconventionally provides illuminated images against a dark background as opposed to a dark image against a light background.

Abstract: A pair of converging sections is provided on right and left sides of the principal optical axis of a reflector, and an area excluding the converging sections is made a horizontally diffusing region. Rays reflected by the converging sections contribute to formation of a converged portion of a light distribution pattern, and rays reflected by the horizontally diffusing region contribute to formation of a horizontally diffused portion. The converging sections have an elliptical paraboloid or paraboloid-of-revolution surface. The horizontally diffusing region is so constructed that the horizontal diffusion angle increases with the distance from the principal optical axis in the horizontal direction.

Abstract: A projector-type headlamp comprises a concave mirror having a reflecting inner surface, a lamp bulb and a convex lens which project forwardly the rays of light emitted from the lamp bulb and reflected at the concave mirror. The reflecting inner surface has formed in at least a portion thereof a light diffusion area consisting of a portion of each of different curved conical surfaces. Since the light diffusion area diffuses light rays at a higher rate in the area near the central portion of the concave mirror than in the peripheral area thereof, it is possible to alleviate the driver's feeling that the luminosity in the hot zone formed near the center of the luminous intensity distribution pattern is too strong.

Abstract: A reflector for a vehicular headlamp in which glare formed by light reflected from a stepped part at the boundary of the adjacent segments constituting a reflector is reduced. Of the distribution control segmental areas on the reflecting surface, a first reflecting area consisting of an aggregation of hyperbolic paraboloid segments forms a pattern widely diffused in the horizontal direction. Second reflecting areas each consisting of elliptic paraboloid segments form a pattern contributing to the formation of the luminous-intensity center of a distribution pattern. A third reflecting area consisting of an aggregation of paraboloid-of-revolution segments forms a pattern contributing to the formation of a cut line tilted a given angle with respect to the horizontal line in the distribution pattern of a passing beam. The focal distance of the reference surface for the paraboloid-of-revolution surface changes for each segment.

Abstract: A reflecting surface consists of three reflecting sectors arranged around the optical axis. The first reflecting sector located above the horizontal plane including the optical axis is a part of a paraboloid of revolution having a focus at point F. The second reflecting sector consists of two sub-sectors located on the right and left sides of the vertical plane including the optical axis. A fundamental surface of the two sub-sectors has a reference parabola in a plane inclined from the horizontal plane by a predetermined angle, and is a collection of intersecting lines each obtained by cutting an imaginary paraboloid of revolution assumed for a point on an orthogonal projection of the reference parabola onto the horizontal plane by a vertical plane including an axis of the imaginary paraboloid of revolution. The third reflecting sector located below the horizontal plane is a part of a paraboloid of revolution having a focus at point G.

Abstract: An improved lighting fixture is disclosed for imaging a high-intensity beam of light at a distant location. A specially-faceted near-elliptical reflector cooperates with a gate aperture and a single aspheric lens to produce a beam that incorporates a very high proportion of emitted visible light, while the reflector has a dichroic coating that reflects only a low proportion of infrared light. The projected beam thereby has a relatively low energy density, such that the front portion of the fixture can be reduced substantially in size and weight. The gate is selectively rotatable relative to the fixture's rear housing.

Abstract: A rechargeable flashlight for automotive use having a universal connector for drawing power from any type of cigarette lighter receptacle. The universal connector includes a ring-shaped portion which establishes a friction connection with the positive feed portions of the cigarette lighter receptacles, and a cylindrical portion for establishing a friction fit with the cylindrical inner housing of the receptacles to establish contact with the negative feed or ground. The rechargeable flashlight and the universal connector can be integral in a single body, the body housing a rechargeable battery, lens/lamp assembly and spare bulbs. A magnetic foot is hingedly attached to the flashlight body for permitting the flashlight to be mounted on any magnetically responsive material and providing a directable flashlight beam. Alternatively, the universal connector can be separate and provide current to any desired electrical appliance.

Abstract: Disclosed is a protective lamp-shade consisted of a cylindrical shell molded from polycarbonate resin, and two silicone rubber end caps mounted on the lamp tube of a lamp assembly at two opposite ends to hold the cylindrical shell in place, wherein the cylindrical shell has parallel teeth around the inside or outside wall to refract the light of the lamp tube of the lamp assembly, and is peripherally and partially coated with a layer of white zinc coating along its length for reflecting the light of the lamp tube of the lamp assembly.

Abstract: The illumination device comprises a housing, a lampholder, a reflector and an electric lamp having a base rigidly connected to its light-diffusing lamp vessel. A light source within the lamp vessel is disposed substantially coaxially with an optical axis of the reflector. The reflector is polygonal in cross sections transverse to its axis and shapes the light generated into a beam, the intensity of which increases from I.sub.o along the optical axis to a value of 105 to 130% thereof at an angle of 5 to 25% to the axis. Scenes illuminated by the device yield evenly exposed photo, film and video images.

Abstract: A recessed illuminating apparatus has a fluorescent lamp horizontally arranged in a cylindrical body, a first reflecting plate having a wave shape is mounted on the body, and a second reflecting plate is mounted by a plurality of supporting members in an open portion at the lower portion of the body, whereby the reflecting efficiency is effectively increased. A plurality of sliding holes are formed in the side wall of the body, and a respective fastening member is inserted into each sliding hole and secures the body when the body is inserted into a recessed hole in a ceiling.

Abstract: A vehicular headlight reflector for forming a low beam light-distribution pattern by effectively utilizing the entire reflecting surface, and providing a light-distribution control function so that a pattern image generated substantially by a lower half surface of the reflector is located below the horizontal line and as close to the horizontal line as possible. A filament is arranged between a focus F of a reference parabola and a reference point D offset from the focus F so that its central axis extends in parallel with an axis passing through the parabola vertex O and the reference point D. A virtual paraboloid is assumed for each arbitrary point P on the reference parabola, the virtual paraboloid having an optical axis that extends in parallel with a light ray vector of a reflected light ray obtained when a light ray assumed to have been emitted from the reference point D and reflected at the point P, passing through the point P, and having the point D as its focus.

Abstract: An illuminating apparatus wherein light which is emitted by one or more projectors is divided into light beams by reflectors or lenses and is directed against the surface to be illuminated by an array of neighboring luminant spots in such a way that the eye of an observer looking at the spots from the surface to be illuminated is not affected by glare, that the surface is adequately illuminated, and that the eye can discern discrete luminant spots. This is accomplished by causing several light beams to impinge upon each unit area of the surface to be illuminated and by appropriate selection of the distance of the surface to be illuminated from the luminant spots as well as by appropriate selection of maximum dimensions of the spots and their mutual spacing in the array.

Abstract: A vehicular headlight, in particular an automobile headlight, including a reflector (1) having a reflecting surface, is capable of illuminating a flat target surface to be illuminated with a desired light distribution by optimal utilization of the light source of the headlight. Therefore the optically effective surface of the headlight is characterized by point asymmetry in substantially all planes cutting said reflecting surface. This can be realized by using a method for producing said optical surface comprising the steps of:mathematically representing said surface by creating a spline from bivariate tensor product of polynomials; deriving mathematical data in computer input format from said mathematical representation; and inputting said data to a computer for controlling an apparatus by which the mathematical representation of said optical surface is reproduced in physical form.

Abstract: Apparatus and a method for combining radiant energy of substantially distinct spectral bands to produce a light source having predetermined color temperature or chromaticity characteristics. The apparatus includes a generating source that generates emissions of radiant energy from at least two spatial emission regions. Each of the spatial emission regions emits radiant energy in a substantially distinct spectral band. The apparatus further includes an optical directing system that directs a substantial portion of the radiant energy emitted from the emission regions. The optical directing system includes a positioning region that contains a near focus and a combining region that contains a far focus.

Abstract: In a slant type headlamp unit for motor vehicles, the reflector has an inner reflecting surface a reflecting area taking the form of a part of a paraboloid of revolution and a light-diverging reflecting area which diverges in the horizontal plane, and a reflects in the vertical plane the rays of light incident from a lamp bulb in directions substantially parallel with the optical axis. The center of the filament of the lamp bulb is disposed nearly parallelly with the optical axis of the reflector and as spaced slightly frontwardly from the focus of the paraboloid of revolution. A front lens is disposed as slanted with respect to said optical axis, covering the front opening of said reflector and having provided on the inner surface by a plurality of prism areas which refract the rays of light emitted from said lamp bulb and reflected at said reflector, thereby forming horizontally elongated illumination patterns and slant illumination patterns frontwardly.

Abstract: A vehicular headlight, in particular an automobile headlight, including a reflector (1) having a reflecting surface, is capable of illuminating a flat target surface to be illuminated with a desired light distribution by optimal utilization of the light source of the headlight. Therefore the optically effective surface of the headlight is characterized by point asymmetry in substantially all planes cutting said reflecting surface. This can be realized by using a method for producing said optical surface comprising the steps of: mathematically representing said surface by creating a spline from bivariate tensor product of polynomials; deriving mathematical data in computer input format from said mathematical representation; and inputting said data to a computer for controlling an apparatus by which the mathematical representation of said optical surface is reproduced in physical form.

Abstract: A signal light particularly adapted for use in traffic signals and vehicle taillights. The signal comprises a lens having at least one central opening, a bulb mounted behind the lens, and a reflector mounted behind the bulb. The reflector has an irregular, crinkled surface in order to produce a sparkling effect in combination with the lens central opening.

Abstract: A light fixture has a source of partially collimated light for emitting light having an axis of collimation. A structured surface has a plurality of prisms that are rendered reflective for reflecting light from the light source out of the cavity. The peaks of the prisms define a surface at least a portion of which makes an acute angle with the axis of collimation.

Abstract: This luminaire has a reflector of substantially transparent material that is adapted to surround a light source. The reflector has many double-reflector right-angle prisms on its outer surface, each characterized by having two reflecting surfaces disposed to effect total internal reflection of a large percentage of the light from the source entering the prism. For controlling the amount of light passing from the source through the prismatic outer surfaces of the reflector, an additive in particle form is dispersed within the transparent reflector material and serves to divert some of the light rays entering the prisms into paths that intersect the reflecting surfaces at angles less than the critical angle of incidence, thereby causing said diverted rays to pass through the prismatic outer surface.

Abstract: A fog lamp reflector includes a reflector body having a reflector surface made up of a series of vertical convex flutes. Each of the flutes is made up of a plurality of segments, and each of the segments is shaped as a section of a respective paraboloid. The focuses of all of the paraboloids substantially coincide at a selected point in space, and the segments of each flute are aimed at a plurality of non-parallel directions with the left-of-center segments of each flute aimed left of the central segment and the right-of-center segments of each flute aimed right of the central segment to laterally disperse reflected light originating at the selected point in space. The focal lengths of the paraboloids increase progressively from one side to the other side of at least some of the flutes, and the paraboloids are each scaled about their respective focus to ensure that adjacent segments meet on the midline of the reflector in a substantially continuous curve.

Abstract: In this luminaire, there is a dome-shaped reflector having a top, a bottom, and a central axis on which a light source is adapted to be positioned. A metal wall of the reflector has an inner surface extending about the central axis and defining a bottom opening through which the inner surface reflects light received from the source. The angular distribution about the central axis of the light reflected from the inner surface through the bottom opening is controlled by many elongated facets on the inner surface extending in a top-to-bottom direction with respect to the reflector. The facets are arranged about the central axis in side-by-side relationship, with juxtaposed facets being at an angle with respect to each other so as to form alternating ridges and grooves between juxtaposed facets. The individual ridges, when viewed in transverse cross-section, each include two of the facets intersecting at an apex that is located on a reference line for each ridge extending radially outward from said central axis.

Abstract: A light reflection sheet is provided incorporating a transparent polyester resin film having an aluminum coating or film disposed on one side and over which a transparent polyester resin film is applied. The side of the first mentioned resin film remote from the aluminum coating is exposed and provided with minute, uneven random reflection permeable faces to reduce dazzling and temporal eyesight problems resulting from direct reflection.

Abstract: A reflector for a lighting unit and a lighting unit comprising the same is disclosed. The reflector has a generally concave surrface, at least a portion of which concave surface is a series of facets. Each facet has a reflective surface area which is convex. Overlap of the light reflected from the reflective surface areas of adjacent facets provides substantially even illumination of a lens or other object.

Abstract: A bowl-shaped, concave reflector, adapted to be assembled with a lamp to provide light reflection, is disclosed. The reflector has a large, front opening through which light is projected, and which is bordered by a peripheral rim composed of four corner zones and four side zones alternating therewith. The width of the rim in the corner zones is greater than that in the intermediate side zones, and the wall of the reflector has four flattened zones adjacent the side zones of the rim, whereby the reflector has the exterior appearance of a four sided body.

Abstract: A bowl-shaped reflector for a vehicle headlight produced by a casting process has a flattened section which extends to its outer edge. Grovoes are formed on an interior side of the flattened section which are elongated substantially in the direction of an optical axis of the headlight. The breadth and depth dimensions of the grooves are related to one another, and side surfaces defining the grooves have surface shapes such that, light rays falling directly in the grooves from a dim-light filament of a bulb mounted in the reflector are reflected a plurality of times on wall surfaces defining the grooves.

Abstract: A luminaire for high intensity indirect lighting providing a horizontally symmetrical light distribution with peak candle power at low angles is disclosed. The luminaire includes an inner light directing member nested in spaced relation within a generally dome-shaped outer translucent member. The inner light directing member includes means for directing the majority of light emitted by an axially located vertical light source out of the upwardly facing open end of the light directing member after no more than one reflection, and means for illuminating the outer translucent member to a substantially homogenious brightness level comparable to that of the surrounding ceiling.

Abstract: A structure is provided for headlamps for vehicles, having a light source, a reflector, and a front lens in which the lens is slanted with respect to a vertical direction of a vehicle body, a rear surface of the lens is formed with a prism zone for forming a light diffusion zone on a light distribution pattern of a given screen and another prism zone for forming a hot zone on the distribution pattern, and the reflector is formed with a first reflecting surface which corresponds optically to the light diffusion zone forming prism zone and diffuses light beams emitted from the light source in a horizontal cross section with respect to an optical axis of the light source and reflects the light beams of the light source substantially in parallel to the optical axis in a vertical cross section and with a remaining reflecting surface substantially in the form of a paraboloid of revolution. Consequently, both ends of the light distribution pattern in the horizontal direction neither droop nor rise.

Abstract: A structure for reflecting visible light or near visible light, wherein the structure is formed of a low dielectric constant material having an external surface comprising an electrically conductive layer of material which has an array of slots therein so as to be substantially transparent to microwave radiation of a predetermined wavelength which will impinge upon the structure during use, while being reflective to light.

Abstract: The inner reflecting surface of the concave mirror of the projector-type headlamp is composed of a central spherical area and a composite ellipsoidal surface of revolution formed by parts of a plurality of different ellipsoidal surfaces of revolution, smoothly joined to each other for junction with the central spherical area, having a common focus at the center of the spherical area and other foci, respectively, at positions spaced ahead of a predetermined distance from the common focus. The lamp bulb is so disposed so as to have the center thereof located near the common focus, and the convex lens is so disposed as to have the focus thereof located near the common focus.

Abstract: A reflector for dental and surgical operating room light fixtures exhibits, in a first cutting plane, an elliptic contour. A parabolic contour is exhibited in a second cutting plane vertical to this first cutting plane. The center of the lamp filament is in the common focal point of the ellipse and parabola. A fine light-diffusing structure overlies the light-reflecting surface to improve the uniformity of the light field.

Abstract: A fog lamp reflector includes a reflector body having a reflector surface made up of a series of paraboloid strips arranged side by side along a lateral direction. Each of the strips defines a respective focus, and all of the focuses coincide at a selected point in space. The strips are aimed at multiple converging directions to laterally disperse reflected light originating at the selected point, and each of the strips defines a respective focal length. The focal lengths of strips progressively farther from the center are progressively greater. The focuses are selected such that adjacent strips are matched in position and the reflector surface is substantially continuous. The reflector surface has a second derivative of lateral displacement with respect to axial displacement which is substantially continuous throughout the reflector surface to provide a visually smooth appearance.

Abstract: The invention relates to a searchlight, in particular a portable searchlight with an accompanying curruent supply. A device is disclosed by which the light of the searchlight can be homogenized, the range of the light beam not being adversely affected or only being adversely affected to a negligible extent by this device and, in a particularly advantageous embodiment of the invention, even being increased.

Abstract: An outdoor lighting system utilizing reflectors capable of producing a uniform distribution of light over a large area. The system reflectors employ parabolic reflecting surfaces utilizing a plurality of adjacent small concave and convex configurations for distributing the light in a uniform manner with a minimum of spillage, and a single reflector may employ three separate types of reflecting configurations to achieve the desired result at variable distances from the light source.

Abstract: A projector type headlamp in which the reflecting surface of a reflector is not the surface geometically decided but composed of a great many minute face elements smoothly connected with each other and the orientation of each face element with respect to the optical axis is decided such that the light incident from a light source is reflected to the vicinity of a meridional image plane of a convex lens and a desired luminosity distribution can be obtained at the position of a shade. According to the headlamp, it is possible to control a distribution pattern so as to have a desired luminosity distribution and to utilize the light emitted from the light source effectively.

Abstract: Micro-irregularities on a surface that interacts with (transmits or reflects) illumination from a light source are effective to control glare perceived by a viewer in the light path projected from the source, while maintaining effective energy and directionality of the projected light. Preferably the micro-irregularities are created by liquid dispersion comprising organic polymeric particles and allowing the coating to dry.

Abstract: An automotive lighting element has a lower surface with a plurality of ridges and grooves. Those ridges and grooves are reflectorized so that light emitted by a light source in the lighting element will be reflected back into other portions of the reflector rather than out of the lighting element with a large upward vertical component.

Abstract: A dipped headlamp for motor vehicles comprising a bulb, a reflector and closure glass placed in front of the reflector and bulb. The bulb is an axial filament bulb without a masking cup. The reflector comprises a reflecting surface without any discontinuity and suitable for forming images of the filament with all points of the image being situated below a horizontal plane. Correction means for angularly displacing said images upwardly to raise them to level of the two horizontal masking half-planes comprise prisms in the closure glass or side sections of the reflector which are tilted upwardly.

Abstract: This invention relates to a reflector for an automobile headlight comprising a reflecting quadric having substantially the surface of a paraboloid of revolution intersected by upper and lower truncation planes, an electric lamp filament being situated substantially at the focus of said quadric to provide full beam lighting by reflection on said quadric of the luminous beams emitted by said filament and traversed by an optical glass situated in front of said quadric. The reflector according to this invention is characterized by the fact that at least the lower truncation plane of the reflector is equipped, on its internal surface illuminated by the full beam filament of the electric lamp, with a plurality of reflecting spherical elements spaced in a concentric arrangement comparable with Fresnel echelons with respect to their common axis passing through the focus of the useful reflecting conic of the reflector, this focus being also their common center.

Abstract: A lamp including a reflector and a light source for illuminating a target area in which the light rays on the target and have a small average local divergence. The reflector and light source are configured so that the predominant portion of the light rays which strike the target area do not cross the axis of the reflector. The reflector may be segmented and the light source is located so that various points on the target receive radiation which is reflected from a different number of segments with points near the periphery of the target area receiving radiation from a greater number of segments than those near the center of the target.

Abstract: A luminaire comprises a reflector having a concave interior surface formed with bands of reflective facets. The bands are organized in groups to provide the desired illumination pattern and enable the reflector to be formed in a simple fashion. The groups of facets are organized in bands which extend arcuately around the interior of the reflector, each facet being oriented to reflect light to a desired luminance center on a roadway surface.