Abstract: An automobile headlamp apparatus comprising a direct current driven discharge lamp surrounded by a concave main mirror which confronts a concave spheroidal sub mirror. The main mirror has a first focus point located substantially at a center of a discharge gap of the discharge lamp between the cathode and anode thereof, while the sub mirror has first and second focus points and an opening therein around the optical axis of the sub mirror. The first and second focus points of the sub mirror are arranged to be substantially on the tips of the cathode and anode of the discharge lamp, respectively. A convex lens may be included to condense the light from the main mirror, wherein the main mirror has a second focus point at a focus point of the convex lens. A shade forming a favorable illumination pattern may be included. In one embodiment, a diagonal mirror is inserted between the main mirror and the convex lens to bend the light from the discharge lamp.

Abstract: An omni-directional taxiway light uses an axially symmetric conjugate lens pair to distribute lamp light, particularly substantially parallel to the taxiway surface, while protruding minimally above the surface. An associated fixture contains a housing holding the optical elements in fixed relative positions and a weather-proof seal arrangement.

Abstract: The front opening of a lamp space with a bulb disposed therein is covered with a lens. The lens is segmented into five sectional areas. Cylindrical steps of which the axes are vertically oriented are formed on the rear side of these sectional areas. These cylindrical steps are arrayed in a zig-zag fashion such that the cylindrical steps in adjacent sectional areas are shifted from each other approximately half the width of a single cylindrical step.

Abstract: A strobe device is provided, including a light source and a reflector which reflects part of the light emitted from the light source. The reflector is provided with a reflecting surface that is shaped to form virtual images of the light source behind the reflecting surface.

Abstract: An improved task light is comprised of a housing having a center cavity portion, a light passage opening below the center cavity portion, and an edge cavity for supporting a light source that emits light from the housing's edge cavity portion into its center cavity portion. A reflector, at least a portion of which spans the center cavity portion of the housing and which portion has a proximal and distal edge in relation to the light source, lies along a path that curves inwardly of the housing such that, when the reflector is viewed through the housing's light passage opening from the level of a task surface below the task light and from any position to the front of the task light, the luminance of the spanning portion of the reflector from reflected source light is substantially uniform over substantially the entirety of the spanning portion of the reflector.

Abstract: A retrofit optical assembly is provided for automotive headlamps that includes a multi-planar mirror that cooperates with a tapered end of a light guide to reduce glare. In an asymmetric parabolic reflective surface arrangement, the multi-planar mirror is offset from the longitudinal axis of the light guide to equalize the magnification and image size. This also has the beneficial effect of reducing the amount of light loss outside of the parabola.

Abstract: A light collector includes a light source and a first and a second primary elliptical reflector partially surrounding the light source. The first and second primary reflectors have a common focal point at the light source. The first and second primary elliptical mirrors each have an opening in which a first light pipe and a second light pipe are located. Each of the light pipes having a face with a known acceptance angle. Each face is located substantially at the focal point of one of the primary reflectors. The first and second reflectors have an eccentricity sufficient to reflect light from the first and second primary reflectors so that light incident on the face of the light pipes does not exceed the acceptance angle of the light pipe. The first and second secondary elliptical reflectors are located within the opening in the primary mirrors. The first and second reflectors have common focal points with said first and second primary mirrors, respectively.

Abstract: A light fitting, preferably intended to be embedded in the surfacing of a runway, includes a light source (2) with a reflector (1) as well as a limiting light opening in the field of light. A mirror device is arranged for reflecting a part of the field of light (4) back towards the reflector (1) for sending this light through the light opening (3) after further reflection.

Abstract: A manifold for use on a vehicle utilizing light from a remote light source. The manifold includes bi-focal parabolic reflector which collects and collimates light from the remote light source which is transmitted to the bi-focal parabolic reflector through a light guide, such as a fiber optic light pipe. Light from the reflector is reflected outward through a plurality of reflective facets to form a light beam.

Abstract: A method and apparatus for improving the accuracy of the simulation of sunlight reaching the earth's surface includes a relatively small heated chamber having an optical inlet and an optical outlet, the chamber having a cavity that can be filled with a heated stream of CO.sub.2 and water vapor. A simulated beam comprising infrared and near infrared light can be directed through the chamber cavity containing the CO.sub.2 and water vapor, whereby the spectral characteristics of the beam are altered so that the output beam from the chamber contains wavelength bands that accurately replicate atmospheric absorption of solar energy due to atmospheric CO.sub.2 and moisture.

Abstract: The invention relates to an illuminator, especially a runway approach flashlight, for forming a directable, generally rectangular light beam, comprising a light source, such as a xenon lamp, an illuminator body (1), and a reflector supported to it and comprising a generally cup-like rear reflector (2) fitted behind the light source, and means for directing the light beam. To achieve a light beam of a desired shape and to enable it to be directed, the reflector further comprises an ellipsoidal counter reflector (3) fitted in front of the light source, the main axis of the counter reflector being substantially parallel to the shorter side of the light beam, and the reflector (2, 3) is supported to the illuminator body by means of joints (11), so that the reflector can be tilted with respect to the illuminator body (1).

Abstract: A vehicular warning light has multiple segments of concave parabolic reflectors assembled for cooperative spreading of the light emitted from a single electric lamp to form an elongated wide angle beam of light in a horizontal plane for alerting the neighborhood to the presence and movement of the emergency vehicle. The axis of revolution of each parabolic reflector is assembled at a differing azimuth angle within the common horizontal plane and the focal points and focal planes of the respective reflectors are dispersed. The equivalent center point of the single light source is therefore defocused relative to at least some of the reflectors. The axis of the elongated light source is centered on the common horizontal plane and is parallel to the fluted light cover lens which is contoured for efficiency in light transmission from the multiple reflectors and for additional spreading and luminous uniformity.

Abstract: A motor vehicle light, especially a signal light comprises a light source, a reflector, a closure disc for closing the motor vehicle light from outside, a collective lens device arranged between the reflector and the closure disc, a screen device arranged between the collective lens device and the closure disc and having light impermeable regions and light permeable regions. The collective lens device directs light which is reflected from the reflector to the light permeable regions. The screen device is formed reflective at its side facing the closure disc, the screen device at least at its side facing the closure disc being curved concavely.

Abstract: A vehicular headlamp assembly with an auxiliary lamp which is small in size and does not require the provision of a special mounting space. A lamp chamber is defined by a generally capsule-shaped lamp body and a transparent front cover applied to the front opening of the lamp body, a reflection or projection lamp for forming a normal running beam, a projection lamp for forming a passing light beam, and an auxiliary lamp are disposed side by side within the lamp chamber, and a mirrored-surface inner cover having an opening through which the front end of the projection lamp is exposed. A bulb for the auxiliary lamp supported by the lamp body is disposed at a position located aslant on the side of the projection lens when viewed from the front in a state such that the bulb is directed forward. The lower edge of the inner cover corresponding to the bulb is substantially horizontally extended to form a horizontal extended part.

Abstract: A method and system for producing a collimated beam of light having a substantially uniform flux density across the entire beam includes a light source adapted to emit light rays; a light integrator adapted to collimate the light rays and provide a uniform flux intensity; and a pair of reflectors adapted to reflect all of the light from the light source into the light integrator. The light integrator includes a fly-eye arrangement of light pipes. Each light pipe includes a pair of lenses adapted to bend the light rays towards the normal to collimate the light rays. In addition the light pipes may be juxtaposed to produce a collimated light beam having a uniform flux density and a desired geometrical configuration (i.e. rectangular, circular).

Abstract: Marker light e.g. for airfields with a casing adapted to be flush-mounted in the ground. A lower light source (2) emits an upwardly directed, collected bundle of light (L.sub.1, L.sub.2), which enters into a prism (4) with a lower planar surface and upper saw-tooth formations (17a,17b), where the light rays are totally reflected and refracted obliquely upwards in two opposite directions. These rays will meet saw-tooth formations (16a,16b) of an upper transparent cover plate (3) at an essentially right angle, said cover plate (3) having an upper, essentially planar or in two different directions slightly inclined surface (3a,3b), where the light rays (L.sub.1 ',L.sub.2 ') are refracted so as to form two light beams (L.sub.1 ",L.sub.2 ") with a desired elevational angle relative to the ground level plane.

Abstract: There is provided a lighting apparatus comprising a light source, an ellipsoidal reflector having the first focal point at the light source, a spherical reflector having the center of sphere at the light source, a converging lens arranged at the outside of the spherical reflector and having a focal point thereof at the second focal point of the ellipsoid, and a light-controlling plate arranged in front of or at the back of the lighted object, so that the light beam projected on the part other than the effective lighted part of the lighted object is reflected by the light-controlling plate with various characteristics which are changeable such as the position or spectral distribution of the light resulting in lighting which is efficient and of uniform intensity and color on the lighted object.

Abstract: A lighting system particularly suited for an automotive application in which it is desired to utilize a central light source and couple the light output therefrom to a headlamp assembly having a number of conventional components includes introducing an output end of a light guide to the reflector assembly in place of an incandescent lamp, and disposing a mirror at the output end of the light guide to reflect light onto a conventional parabolic reflector. The mirror is preferably planar and serves to direct the light from the output end of the light guide to the parabolic reflector for collimation thereby and subsequent passage through a conventional lens member.

Abstract: A vehicular headlight having a low height-to-width ratio includes a plurality of collimating lenses. The collimated light output from certain ones of the lenses is redirected into the forward direction by separate sets of reflectors associated with the respective lenses. Means are provided to impose a desired light pattern on the forward-directed light outputs.

Abstract: A tubular illuminator for focusing a bright line of approximately specular illumination onto the surface of a web moving at high speed to detect defects usually in the surface of the web.

Abstract: An adjustable outdoor light fixture powered by an electrical current provided by wire leads capable of producing a variable light beam distribution pattern comprising, a housing having an outside surface and an inside surface and defining a cavity with an open face, a reflector supported within the cavity of the housing, a lens covering the open face of the housing, the lens movable relative to the reflector, and a light source connected to the leads adapted to be attached to the lens within the cavity of the housing whereby the lens and the light source are movable relative to the reflector in order to produce a variable light beam distribution pattern. Also included is a reflex optics reflector for an outdoor light fixture that improves transmittance of light from the fixture.

Abstract: A light emitter for emitting partially collimated light in one or more selected directions. The light emitter has a longitudinally specularly reflective internal surface; and, a light emitting area having an inner portion which is both partially longitudinally specular reflective and partially longitudinally transmissive and, a refractive, prismatic outer portion.

Abstract: A lamp assembly particularly for a luminaire comprising a lamp having a light emitting member of generally torroidal shape and a reflector positioned and shaped to reflect light received from the light emitting member through the central opening. The light emitting member is preferably a filament of an incandescent lamp. The reflector has a cross-section comprising first and second arcs which are substantially symmetrical with respect to a line joining the center of the reflector and a point substantially at the centre of the torroidal member and the shape of the reflector is that described by rotating said arcs about said line. The arcs may be elliptical or circular for example with their foci or centers positioned to achieve the required effect.

Abstract: An illuminating apparatus includes a light source section; an integrator section for spreading out and making uniform light generated from the light source; and a collimator lens for making the light which is spread out and made uniform by the integrator section a parallel light flux, wherein the integrator section is formed of a reflecting member for reflecting light generated from the light source section toward the collimator lens.

Abstract: The lamp has a case with a light exit opening. A reflector is arranged on the rear wall of the case facing the light exit opening, in front of which an elongated light source is arranged. Between the light source and the light exit opening there is a flexible optical film, stable in shape, with a smooth surface and a structured surface. The smooth surface faces the light exit opening, while the structured surface is directed toward the light source. The structure consists of a plurality of V-shaped grooves extending in parallel to each other and transverse to the longitudinal extension of the light source, the grooves lying immediately side by side. The optical film extends only in that area in which the light source emits light directly toward the light exit opening.

Abstract: A lamp assembly particularly for a luminaire comprising a lamp having a light emitting member of generally torroidal shape and a reflector positioned and shaped to reflect light received from the light emitting member through the central opening. The light emitting member is preferably a filament of an incandescent lamp. The reflector has a cross-section comprising first and second arcs which are substantially symmetrical with respect to a line joining the center of the reflector and a point substantially at the center of the torroidal member and the shape of the reflector is that described by rotating the arcs about the line. The arcs may be elliptical or circular for example with their foci or centers positioned to achieve the required effect.

Abstract: Given is an operating light, with one or several spotlights, each with a light source, that is shielded by a counter reflector in the direction of radiation. The stream of light is focused by the counter reflector and a reflector onto an optical system closing off the housing in the direction of radiation. To guarantee a homogeneous illumination of deeper surgical wounds also, the optical system is structured as a Fresnel lens made up of annular prisms that contain a dioptric central region and a catadioptric edge (rim) region. The slope of the flanks and the height of the annular prisms are dimensioned such that the light beams emanating from the Fresnel lens cut the optical axis at a distance that is all the greater the shorter the distance with which the light beams emanate from the Fresnel lens is away from the optical axis.

Abstract: A lamp unit having an elliptic reflector, a light source positioned at a first focus point of the elliptic reflector, a bracket fixed to a front end of the reflector, a projection lens mounted on a front end of the bracket and a holder member for holding the projection lens onto the bracket. The holder member is a plate like member provided along the circumference of the bracket. One end of the holder member is bent inward to form a bent portion which supports a rear end of the projection lens, while the other end of which is partially press-fitted in a plurality of holes formed on a side surface of the bracket.

Abstract: A vehicular lamp which provided with a lamp body, an elliptic reflector accommodated in the lamp body, a light source positioned within a first focal area of the elliptic reflector, a projection lens positioned so that a focal point of which positions within a second focal area of the reflector, the light passing through the projection lens being substantially parallel, and an outer cover provided over the projection lens. An inner side of the lamp body is dark colored and the outer cover is made transparent.

Abstract: A headlamp for a vehicle adapted to radiate a light beam therefrom exclusively for passing-by vehicles includes a single filament, a main reflector, an auxiliary reflector and a lens. The auxiliary reflector is divided into two parts, i.e., an upper auxiliary reflector and a lower auxiliary reflector along a horizontal line extending through the filament. The upper auxiliary reflector, has a focus which is located at the position in the vicinity of the rearmost end of the filament, while the lower auxiliary reflector has a focus which located at the position in the vicinity of the foremost end of the filament. The auxiliary reflector is basically arranged in the region where the main reflector can not completely collect a light beam radiated from the filament. The upper and lower auxiliary deflectors have an inner diameter and an outer diameter, respectively.

Abstract: A headlamp having minimal glare, composed of a housing having preferably a non-reflective interior, an electric bulb located within the housing and a simple convex lens mounted to the housing and through which external illumination is provided. For purposes of incrementing the illumination output, a flat mirror is placed rearwardly of the electric bulb. According to this structural configuration, no concentrated beams of light are created, and illumination is pleasingly uniform and of minimal glare.

Abstract: A lensed reflector system for a luminaire produces a specular beam of reflected light to provide a degree of directivity to an otherwise non-directive reflector surface. The lensed reflector system is formed by a prismatic lens material, such as a Fresnel lens, overlaying a reflector substrate having, in one aspect of the invention, a diffuse reflecting surface. The combination of the diffuse reflector and prismatic lens, together with the positioning of the reflector system in relation to the luminaire's light source, provides a reflector system which uniquely exhibits both diffuse and specular reflection characteristics depending on the angle at which the reflector system is viewed. The lensed reflector system of the invention can suitably be used in indirect lighting systems employing compact fluorescent lamps for increasing the spread of light from the fixture onto adjacent wall surfaces.

Abstract: The present invention is a light fixture having a reflector designed to discard preselected amounts of light from a light source. The percentage of the light discarded will vary over the surface of the reflector in order to provide a predetermined output intensity distribution.

Abstract: The invention pertains to a stroboscopic timing light for use with internal combustion engines. The reflector assembly is designed to increase the proportion of light from a flash tube that becomes part of a focused light beam. The reflector assembly comprises a pair of angled reflectors or series of reflectors forming a frusto-pyramid-like structure which reflects an array of images of a flash lamp. These images reflect the substantial portion of the light from the flash lamp while providing a cost effective and relatively inexpensive reflector assembly.

Abstract: An illuminating method and an illuminating apparatus for use in combination, for example, with an exposure apparatus. The illuminating apparatus comprises amplitude distribution control means for converting the intensity distribution of a light beam emitted by a highly directional light source into a substantially linear intensity distribution, beam splitting means for splitting the light beam into a plurality of component beams, and superposing means for superposing the component beams in a desired area on an object, such as a reticle, in an uniform illuminance distribution.

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 light signalling anti-phantom device includes a collimator with a reflector (2), a light source (1) disposed in the focal point (F) of the collimator, and an absorber (3) of light. The reflector (2) and absorber (3) are arranged so that any focal ray (4) directed in opposition to the focal ray (5) incident on the reflector (2) falls on the absorber (3). The reflector (2) may be a mirror or catadioptric rings (23) exhibiting total internal reflection. This design eliminates false external illumination signals and makes light signals more contrast during daytime.

Abstract: An indirect lighting system having a generally visible light transmissive element, such as a prismatic lens element or a diffuser strip, which modifies the direction of the light incident thereon from a secondary light source. The lighting system has a primary light source and structural means for positioning the primary light source proximate a reflective surface which reflects light back toward the light transmissive element and which thereby acts as a secondary source of light for illuminating this element. A light foil means is disposed between the primary light source and light transmissive element for substantially blocking direct transmission of light to the latter from the former. The light foil means, by keeping primary source light from directly striking the light transmissive element, forces the observable brightness in this element to be induced substantially entirely by the reflected light from the secondary source.

Abstract: The projector-type head lamp for use on vehicles according to the present invention comprises a reflector formed by a concave mirror having two foci, light source disposed near the first focus of the reflector, and convergent lens disposed opposite to the reflector with the second focus of the reflector located at the intermediate position between the lens and reflector. The convergent lens has an optical axis which is also the optical axis of the reflector and a focus located near the second focus of the reflector. There is provided near the focus of the convergent lens a shade which has a cut-off edge nearly in contact with the optical axis to produce a shaped beam. The convergent lens is composed of a frontal surface defined by an aspherical plane and a back surface defined by a flat plane which is so inclined in relation to the optical axis as to be nearer to the focus of the convergent lens as it goes from the upper portion toward the lower portion.

Abstract: Herein disclosed is a vehicle headlamp which comprises a compound light reflector including a plurality of concave light reflecting surfaces which are arranged to have a first common focus, either one of a second common focus and a second common focal line, and a common optical axis, each light reflecting surface being so shaped as to provide an elliptical line when cut by a vertical plane; a light source located on the first common focus of the compound light reflector; a shade plate positioned in front of the compound light reflector, the shade plate having an upper edge located in the vicinity of one of the second common focus and the second common focal line; and a converging lens located in front of the shade plate in such a manner that a focus of the lens is positioned on the upper edge of the shade plate.

Abstract: A central high mounted stoplight arrangement for a motor vehicle that utilizes an optical prism coupler mounted on the rear deck lid at the center thereof for receiving and projecting light rays to the rear of the vehicle.

Abstract: A headlamp for an automobile vehicle comprises a luminous filament, a reflector, and a closing glass. According to the invention, the reflector comprises a parabolic base part and side pieces in the form of parabolic cylinders focussed on the filament, and in addition there are deflecting means, for example toroidal lenses, which re-direct the inclined rays of light received from the filament into the horizontal direction, towards the side pieces. A greater proportion of the luminous flux is thus recovered, which enables production of lamps with a small height and with a high efficiency.

Abstract: A projector type headlight is disclosed, which comprises a concave reflector having first and second focuses on an optical axis thereof; a light source located on or at least near the first focus of the concave reflector; a shade plate positioned in front of the concave reflector, the shade plate having an upper edge located in the vicinity of the second focus of the concave reflector; and a converging lens located in front of the shade plate in such a manner that a focus of the lens is positioned on the upper edge of the shade plate, wherein the optical axis of the concave reflector is inclined with respect to an optical axis of the converging lens.

Abstract: A reflector/refractor device is provided for use with a variety of lighting fixtures and light sources. The reflector/refractor device includes a body having a predetermined profile and defining a cavity with the body having an inside surface and an outside surface. An illuminating source for emitting light is disposed within the cavity substantially along a central vertical axis of the body. The body includes a series of sectional zones for reflecting and refracting light. The exterior surface of the device includes a plurality of substantially vertical prisms consisting of reflective elements, refractive elements and elements that may be either reflective or refractive depending on light center location. These reflective or refractive elements act in combination to selectively vary light distribution characteristics of vertical and lateral angles, and intensities, by vertical displacement of the illuminating lamp source.

Abstract: A plastic lamp housing is molded in one piece with two cantilevers extending forwardly from its rear wall for supporting a metal made reflector and a light bulb out of direct contact with all the inside surfaces of the lamp housing. The reflector thermally covers at least the top and bottom and rear sides of the light source for the reduction of heat transmission to the lamp housing. Depending from the lamp housing, a lamp standard has a hollow extending therethrough in communication with the interior of the lamp housing through a heat release opening formed in the bottom of the lamp housing. The lamp standard is for use in mounting the lamp on a hollow structural part of a motor vehicle in the vicinity of its rear window. Therefore, by creasing an opening in the hollow vehicle part, the heated air within the lamp housing can be vented into the hollow lamp standard and thence into the hollow vehicle part, instead of into the interior of the vehicle body.

Abstract: A motor vehicle foglight of the type comprising: a lamp having a transverse horizontal filament (10); a reflector (20) whose axis (Ox) passes in the same vertical plane as the center of the filament (F.sub.O); and a closure glass (30). According to the invention the surface of the reflector is a surface without discontinuity forming images of the filament in which all the points of the images are situated below a horizontal cutoff and in a horizontal strip of substantially constant height situated beneath said cutoff. The invention is applicable to foglights which do not include a masking cup.

Abstract: An indicator light for a motor vehicle, the light being of the type comprising a substantially point light source (10) and a flat closure glass (20), situated in front of the source, together with beam-forming means for forming a beam of light rays (x'x) propagating along a given general emission direction of the light, said beam-forming means comprising: a generally flat or concave mirror (30) disposed behind the light source and comprising a set of stepped reflecting zones (32, 32, 33) inclined to reflect light rays from the source towards the glass; and a set of deflector zones (201, 202, 203) which are generally in the form of concentric rings on the glass, each zone being formed by a set of narrow prisms all having the same profile within each zone, said profile being designed as a function of the average direction respectively of direct rays and of reflected rays received by said zone.

Abstract: The invention is directed to a vehicle headlight including a projection lens secured by a covering disk. No diaphragm is interposed between light source and the projection lens. The lens having the shape of a flat sector of a cylinder with a cut-off apex. An inner lens surface having a uniform curvature and an outer lens surface having a toroidal curvature.

Abstract: The invention provides a motor vehicle main beam and dipped beam headlight of the type comprising: a lamp provided with a transverse horizontal dipped beam filament (10a) and a transverse horizontal main beam filament (10b), said filaments being offset relative to each other in two directions perpendicular to the axis of the headlight; a reflector (20) whose axis (Ox) passes between the two filaments; and a closure glass (30) including members for deflecting the dipped beam and the main beam sideways; the headlight being arranged so that the dipped beam is situated beneath a cutoff (Hh) whose orientation is generally horizontal. According to the invention the surface of the reflector is a surface without discontinuity forming shallow images of the dipped beam filament and of the main beam filament, with all of the points in the images of the dipped beam filament additionally being situated beneath said horizontal cutoff (Hh).

Abstract: A head lamp for motor vehicle dimming and fog lights having a reflector reflecting beams of a light source to form a light beam directed along a path, a diaphragm with an edge arrangable in the path, an achromatic lens arrangable in the path to portray an image of the edge as a light-dark border of the light beam on a roadway and a correction element arrangable in the path to at least reduce a color fringe otherwise present on the light-dark border of the light beam from chromatic aberration.