Abstract: An apparatus and method of minimizing glare from a lighting fixture using reflective glass as a lens and where the fixture is configured or desired to be configured to converge light to the same point in space. The method aims a top-most or bottom-most portion of the main reflector so that light reflected from it travels perpendicularly to the lens. Remaining portions of the main reflector either automatically adjust to the top-most or bottom-most portion or are adjusted so that glare is minimized by reimaging of the light source caused by reflectance from the glass lens in a manner that such reflectance is blocked wholly or partially by the light source and/or the holder of the light source and/or the supporting structure positioning the holder of the light source in place inside the housing. The apparatus according to the invention includes a lighting fixture having a housing, a light source and reflector in the housing, and a glass have reflecting properties on the housing.

Abstract: A photographic contact printing device has a point-like light source (17) and two uni-directionally curved parabolically cylindrical mirrors (18, 19) the axis of curvature (22, 23) of which are perpendicular to each other, and one axis (23) being parallel to the exposure plane.

Abstract: The present invention is directed toward a light concentration and collimation device including a tapered body concentrator and a curved, preferably parabolic, reflective collimator combined in a unit such that the apex of the tapered body extends into the reflective collimator through its apex. The concentrator is preferably hollow with a reflective inner surface to funnel light from the base to the apex where an aperture allows the concentrated light to enter the collimator proximate to its focus. The light is then reflected from the inner surface of the collimator to form a beam of collimated light. The concentration and collimation device is particularly useful in visual display apparatus and may be combined with a spectral peak light source and a spectral distributor to produce individual collimated beams of light at specific wavelengths.

Abstract: An optical system operable to focus an annular beam of light onto a spot 16 comprises a paraboloidal reflector 10 with a lamp 12 at its focus, a coaxial annular convex lens 13 and a coaxial internally silvered conical mirror 15. A parallel beam of light formed by reflection by the reflector 10 of light from the lamp 12, is formed into a convergent annular beam by the lens 13 and reflected by the mirror 15 which is located between the lens 13 and its focus so that it converges to the spot 16.

Abstract: An optical system which utilizes a conventional light source to produce a narrowly focused beam of radiation having intensity similar to that produced by a laser. The system broadly includes an omnidirectional light source and an elliptical reflector, wherein the physical parameters of the light source and the reflector are matched to produce a narrowly focused beam of intense radiation. The light produced by the system is coupled into a fiber optic system for delivery to the target area. In one embodiment, a mirrored surface having an aperture therein is placed at a point near the second focal point of the reflector. The aperture is positioned such that only rays meeting predetermined geometrical exit criteria can pass through the aperture and be accepted by the fiber optic located at the second focal point. Those rays which do not meet the exit criteria are reflected by the mirrored surface toward the interior of the cavity.

Abstract: An optical correction layer for a light emitting apparatus having gaps in brightness at the light-emitting surface. The optical correction layer includes a plurality of optical correction regions centered over the gaps, and a plurality of optically transparent regions which overlay the remainder of the light-emitting surface. The optical correction regions include appropriately formed grooves which collect and redirect light adjacent the gap. The light is redirected to cover and effectively conceal the gap. The optically transparent regions permit light to travel through, without redirection.

Abstract: A light source apparatus for generating parallel light is equipped with dual mirrors to compensate for a shadow cast by the lamp itself. The apparatus includes an elliptical reflector and a light source located at the near focal point of the elliptical reflector. A first mirror having an aperture in the center thereof, for reflecting rays emitted directly from the light source back toward the light source, and a second mirror positioned directly in front of the light source, for reflecting the rays reflected from the first mirror and passing the rays through the aperture of the first mirror are provided. A collimating lens is provided for forming parallel light by focusing the rays passed through the aperture of the first mirror, thereby being used as the light source or other element of an optical instrument which requires a highly uniform parallel light source.

Abstract: A headlight has a light source and a reflector. A screening device is associated with the light source and has a web located at both sides of the light source and extending along the optical axis. A light-impermeable cap forms a part of the screening device arranged under the light source. A gap-like opening remains between the upper edges and the lower edges of the webs. Above the web, light emitted by the light source and reflected from the upper region of the reflector can pass and form a low beam to produce an upper bright-dark limit by the upper edges of the webs. The light passing through the gap-like openings is reflected from the lower region of the reflector and forms an additional light beam arranged at a distance above the bright-dark limit.

Abstract: A linear light source having a relatively large numerical aperture emits reading light of a substantially fully diffused light intensity distribution toward a film original that is held between support glass panels. The reading light passes through the film original and then through a slit that is disposed as a field stop between the film original and a reading lens and positioned closely to the film original for limiting a field of view with respect to the reading light. The reading light that has passed through the slit is converged by the reading lens onto CCD line sensors each having the same field of view as that of the slit.

Abstract: A radiant energy redirecting system, comprising at least two light-emitting sources, each emitting different frequency light; an optical cavity receiving light output from the sources, to mix therein, and act as a secondary emitter; a light receiver positioned to be illuminated by light from the secondary emitter.

Abstract: The invention concerns a lighting system for spotlights, for automobile headlights, for medical and industrial spotlights. It consists of the light source (1), particularly the halogen light bulb, auxiliary mirror (2), the main mirror (3), consisting of a system of concave spherical mirrors (31), and a raster lens (4). All of these elements lie on the main optical axis (0). If a system of condensers (5) and an objective (7) is added to the basic part, the system can be used for cinema projectors and enlarging apparatuses.

Abstract: A light head assembly for directing light generated by a remote light source and transmitted through a light pipe. The light head assembly has at least one optic deflector with a convex reflective surface for intercepting and redirecting the light beam emitted from the end of the light pipe. The thus redirected light is incident upon a larger primary reflector having a concave reflective surface which subsequently redirects the light toward the ambient environment. The optic deflector is supported at a desired distance from, and with an appropriate orientation to, the end of the associated light pipe so as to substantially eclipse the beam of light discharged from the light pipe.

Abstract: A light source and optical delivery arrangement for use with a projection lighting system as may be used in the stage and studio fields, includes a high brightness light source which achieves a light output in excess of 4000 lumens at a power rating of approximately 60 watts and wherein such efficiency is achieved in conjunction with a rated life of greater than about 4000 hours for such light source. The light source is disposed at the first optical focal point of an ellipsoidally shaped reflector with an input end of an optical coupler disposed at the second optical focal point of the reflector in order to receive the light output from the light source. The optical coupler member has a cross-sectional surface area which is polygonal in shaped and is effective so as to provide a light output therefrom which is essentially uniform in terms of color and intensity. A prismatic member is disposed on the optical coupler member for re-directing the light output into a lens member.

Abstract: A lamp especially designed for use with plasma discharge light sources such as neon tubes. The lamp provides secondary reflective surfaces to ensure that each ray of light leaving the neon tube strikes at least one metallic reflective surface so as to reduce the troublesome RF characteristic of the neon tube and reduce the interference with other electronic equipment on board the vehicle.

Abstract: A parallel light generating apparatus uses two arrayed mirrors. The apparatus includes a parabolic mirror, a lamp located at the focal point of the parabolic mirror, and first and second arrayed mirrors disposed in parallel, each of which is divided into plural portions, with each portion being divided again into parts. A panel is situated between the arrayed mirrors and has a plurality of holes corresponding to each portion of both mirrors, for blocking non-parallel light.

Abstract: The improved illuminating apparatus comprises a spheroidal mirror, a light source, a spherical mirror and a condenser lens. The spheroidal mirror has such a shape that it is deficient of a portion that would otherwise reflect light that illuminates any portions other than the object to be illuminated, and that the light from the light source which is directed toward said missing portion is reflected by the spherical mirror positioned on the rear side of said missing portion as seen from the light source and makes another reflection by that part of the spheroidal mirror which faces away said missing portion, thereby illuminating the object. The light source is positioned at the first focal point of the spheroidal mirror in such a way that it faces the mirror, and the spherical mirror is positioned in such a way that its reflecting face lies at the second focal point of the spheroidal mirror.

Abstract: The headlamp is of the projection design and comprises a reflector (1), a light source (2), a screen (3) and a lens (4). An aperture reflector (5) is situated below the headlamp axis (12) between the lens (4) and the refractor (6). The aperture reflector (5) has a reflective surface (51) which is inclined in a vertical plane to the headlamp axis (12) at an angle .alpha., which together with the length (L), determines the intensity and geometry of the light beam above the horizontal axis in the vertical direction. The transverse dimension of the light beam above the horizontal is determined by the radial cambering of the reflective surface (51) of the aperture reflector (5) of radius (R.sub.x) and width (S) and/or by reflexive elements (52) on this reflective surface (51). The refractor (6) is provided with optical means with transverse and/or vertical deviation in a zone (61) which covers the aperture reflector (5) and the bottom part of the lens (4).

Abstract: A light assembly for a motor vehicle has a housing and a transparent plate closing off the housing. At least one light-emitting device is positioned in the housing for illuminating the transparent plate. At least one main reflector is positioned in the housing for reflecting light emitted by the light-emitting device to the transparent plate. A prism is positioned in the housing so as to be placed at least partially in the path of the light emitted by the light-emitting device, whereby the prism reflects the light impinging thereon to the main reflector so as to be reflected onto the transparent plate.

Abstract: A light emitting device includes a reflector assembly combined with a chassis. A light source is coupled to the reflector assembly. A reflective surface is formed on the reflector assembly to reflect light generated by the light source. A transparent cover is mated to the chassis enclosing the reflector assembly and the light source.

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: A centralized lighting system is provided having a high intensity light source which is disposed at approximately the first optical focal point of an ellipsoidally shaped reflector member. A mirror member, disposed in advance of a second optical focal point associated with the reflector member, receives light output from the light source and is constructed so as to divide the light output into at least first and second beam portions. The mirror member is further effective so as to separate the first and second beam portions by at least 90 degrees relative to one another. Corresponding at least first and second optical transmission members are receptive of the first and second beam portions and are effective for communicating the light output to locations remote from the light source. In one embodiment, the mirror member is V-shaped and is constructed of first and second mirror segments joined together so as to form an angle of less than about 85 degrees therebetween.

Abstract: A central lighting system for providing light to locations remote from the light source includes first and second ellipsoidally shaped reflector members joined so as to substantially surround the light source. The reflector members collect the light output and focus it onto an input face of either a light guide or a non-imaging optical coupling member. If the optical coupling member is utilized, an angle to area conversion occurs so as to allow light introduced at high angles to an input face of the optical coupler to exit the optical coupler at a smaller angle. The reflector members can also be configured so that respective second optical focal points can reside at the apex of the opposing reflector member thereby allowing for a coupling efficiency of approximately 70% or greater.

Abstract: A light coupler includes an array of non-imaging optical microcollectors. Each of the microcollectors has an entrance aperture for receiving light emitted from a source, an optical axis, and an exit aperture for emitting the light received by the entrance aperture. The array of non-imaging optical microcollectors are adapted and arranged such that the entrance apertures together subtend an acceptance angle for accepting divergent light emitted from the source and such that the optical axes of the non-imaging optical microcontrollers converge. The acceptance angle preferably is substantially matched to a divergence angle of the source. The entrance apertures can be mapped to a portion of a spherical surface (e.g., a hemisphere) which has a radial center at an apparent or actual center of the source. Alternatively, the entrance apertures can be mapped to a portion of a parabolic surface which has a focus at an apparent or actual center of the source.

Abstract: An illumination system for illuminating a surface includes a reflecting element having a finite focal length. A light source is located at a point, close to a focal point of the reflecting element, which is deviated from the principal axis of the reflecting element. Light from the light source is reflected by the reflecting element, whereby light with parallel rays is directed toward the surface. The surface is illuminated with symmetrical illuminance distribution with respect to the optical axis of the light.

Abstract: A multiple element reflector usable with an elongated light source in a strobe unit provides wide fields of view in both horizontal and vertical directions when the unit is mounted on a wall. The reflector includes a first, elongated, curved reflector element which extends generally parallel to the elongated light source. At least second and third centrally located reflector elements extend between the first reflector element and the light source. The first reflector element provides illumination generally in horizontal and vertical directions perpendicular to the elongated source. The second and third centrally located reflector elements provide illumination in a direction generally along the elongated source.

Abstract: A light source includes an integral reflective coating on a portion of its envelope for reflecting light back through the source. The light from the source is directed by a reflector toward a focus thereof at which is located an input end of a light guide. The integral reflective coating allows a half ellipsoidal reflector to be used in one embodiment without depreciable loss of light. Accordingly, a pair of light sources can be arranged with a common focus to substantially double the brightness in the light guide. Alternatively, the light sources can provide a primary and redundant arrangement, or used to provide two levels of light in another arrangement. According to another embodiment, a hemispherical reflector is used to obtain unit magnification and increase the angular range through which light may enter the light guide.

Abstract: A highly controllable way to light target areas includes a primary reflector which generates a defined primary beam in association with a light source. The primary beam, or at least a portion of the primary beam, is directed onto a target reflector which generates a secondary beam to the target space. The secondary reflector can be configured in any number of contours, shapes, secularities, or other characteristics to alter and control the characteristics of the secondary beam. Other options, enhancements, alternatives, and features are possibly utilized with the principles of the present invention or by a primary light source is reflected off a secondary reflector means. This invention supplies a way to light the underside of an airplane while, for example, a wing is being painted. A light source is place a substantial distance away from the wing of the airplane to be painted. The light source includes a primary reflector to direct the light.

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 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: An illumination system having a concave minor for imaging a light source. The illumination system includes a light source, a first concave minor for imaging the light source and a second concave minor for reimaging the imaged light source at another location. The system timber includes a light collecting element passing through the surface of one of the concave mirrors enabling light removal without reimaging the light source outside the radii of curvature of the concave mirrors.

Abstract: A bulb (4) of lamp (1) has a reflection film (2) or reflection mirror (9) to make light components going outside a reflector (3) direct to the reflector (3) to reflect. If the lamp (1) is a spot light source, a light emission center is positioned at a center of spherical reflection mirror (9). If the lamp (1) is not a spot light source, the reflection mirror (9) is made ellipsoid and at its two focal points, ends of two light emitting electrodes are positioned. Also, the lamp (1) having the reflection mirror (9) is used in the illumination unit for a liquid crystal display apparatus to increase the brightness of the image projected onto the screen (26). Further, the liquid crystal display device (23) has within a liquid crystal display device (23) a microlens array for collecting the incoming light into an area of each picture element electrode (39) to increase the light utilization efficiency of the liquid crystal display device (23).

Abstract: A multi-purpose lamp (10) for outdoor use provides, as desired, a function of a pagoda lamp or of a projections lamp, or of a combined pagoda-projecting lamp.It includes a pole (101) for insertion into the ground, a support 102 mounted on the pole (101) in desired angular position, a bulb (107) within the support (102), a lens (104) mounted on the support (102) above the bulb (107), a convex-concave reflector (113) mounted within the support (102) and disposed below the bulb (107), and two shades (105, 106) mounted on the support (102). The shades (105) is a pagoda-type shade which comprises another convex-concave reflector (117), so as, when the pagoda-type shade (105) is mounted on the support (102) to provide a pagoda lamp performance, the reflectors (113, 117) form a pair of spaced-apart convex-concave parabolic reflectors substantially parallel to each other.The shade (106) is a ring-type shade. When the ring-type shade (106) is mounted on the support (102), the lamp (10) performs as a projecting lamp.

Abstract: A motor vehicle headlamp has a cover glass closing a reflector that contains a light source. The reflector comprises upper and lower portions joined through a reflective base. Its lower portion is reflective and/or diffusive, while its upper portion has reflective means which at least partly retransmit light from the source in a beam passing through the cover glass. The reflecting means comprise cylindro-elliptical or ellipsoidal Fresnel ribs which concentrate the reflected beam in a focal zone in front of the cover glass. The beam diverges beyond this focal zone.

Abstract: A multiple element reflector usable with an elongated light source in a strobe unit provides wide fields of view in both horizontal and vertical directions when the unit is mounted on a wall. The reflector includes a first, elongated, curved reflector element which extends generally parallel to the elongated light source. At least second and third centrally located reflector elements extend between the first reflector element and the light source. The first reflector element provides illumination generally in horizontal and vertical directions perpendicular to the elongated source. The second and third centrally located reflector elements provide illumination in a direction generally along the elongated source.

Abstract: The improved illuminating comprises a spheroidal mirror, a light source, a spherical mirror and a condenser lens. The spheroidal mirror has such a shape that it is deficient of a portion that would otherwise reflect light that illuminates any portions other than the object to be illuminated, and that the light from the light source which is directed toward said missing portion is reflected by the spherical mirror positioned on the rear side of said missing portion as seen from the light source and makes another reflection by that part of the spheroidal mirror which faces away said missing portion, thereby illuminating the object. The light source is positioned at the first focal point of the spheroidal mirror in such a way that it faces the mirror, and the spherical mirror is positioned in such a way that its reflecting face lies at the second focal point of the spheroidal mirror.

Abstract: A linear light source for a film scanner includes an elongated light integrating cavity, formed within a light integrator, having diffusely reflective walls. Light is introduced into the cavity through an input port, and an output scan line of diffuse light is produced through an exit slit which is generally parallel to the longitudinal axis of the integrating cavity. The scan line of light is directed on film to be scanned in a stripe of illumination. The scan line of the illuminated film stripe is imaged onto a tri-linear CCD array for conversion of color intensity modulated pixels into scan line data sets. The linear light beam is reflected from a source region within the integrating cavity visible through the exit slit. In order to make the brightness profile of the linear light beam more uniform and avoid position dependent signal level drop outs, sharp angle joints in the source region are replaced by arcuate sections.

Abstract: In an optical illumination instrument for use in photolithographic process of manufacturing semiconductor devices, a reflection type homogenizer is composed of an array of paraboloid mirrors of a same size arranged on a same plane.

Abstract: An illuminator for vehicle exterior lamps using a remote light source. Light is transmitted to the illuminator by a light guide, such as a fiber optic light pipe. The illuminator utilizes a complex mirror and a reflector to collect and collimate over 80% of the light from remote light source into a desired parallel beam for use as an automotive headlight.

Abstract: A headlamp, particularly for vehicles. The headlamp includes a solid piece body formed from a transparent material. The body includes a first, light transmitting surface portion. At least a first and a second opaque mirror surface are disposed on opposite sides of a second surface portion of the body. The first mirror surface is shaped to produce a desired distribution of reflected light on the second mirror surface; the second mirror surface is shaped to produce a desired reflected light distribution in an area illuminated by the headlamp. Light from at least one light source is directed to the first mirror surface, reflected by the first mirror surface to the second mirror surface, and then reflected by the second mirror surface through the light transmitting surface.

Abstract: An electromagnetic radiation source, such as an arc lamp, is located at a point displaced from the optical axis of a concave toroidal reflecting surface. The concave primary reflector focuses the radiation from the source at an off-axis image point that is displaced from the optical axis. The use of a toroidal reflecting surface enhances the collection efficiency into a small target, such as an optical fiber, relative to a spherical reflecting surface by substantially reducing aberrations caused by the off-axis geometry. A second concave reflector is placed opposite to the first reflector to enhance further the total flux collected by a small target.

Abstract: Disclosed is a vehicular headlamp, which has a reflecting surface curved outward, a lens covering the front of the reflecting surface and a filament disposed at a predetermined position at the reflecting surface, whereby the light emitted from the filament is reflected at the reflecting surface to irradiate a low beam. This headlamp further has an auxiliary reflecting surface provided at a position out of the region which extends from the filament and covers the effective reflecting surface of the reflecting surface. The auxiliary reflecting surface is positioned substantially horizontal and substantially parallel to the irradiation direction. The vehicular headlamp with the above structure can therefore produce beams to illuminate overhead signs from the light reflected at the auxiliary reflecting surface while emitting no dazzling light to an approaching vehicle from the auxiliary reflecting surface. Further, this headlamp does not deteriorate the designability of the lens.

Abstract: A lighting fixture that has two light sources and a reflector that reflects each light source up to seven times to provide high efficiency and uniform illumination. At some angles some of the reflections are blocked by the two light sources so that depending on the angle, more or less light sources are available for illumination. A method of providing efficient and uniform illumination. The method comprises providing two light sources and then reflecting each of them in two steps to create a total of sixteen light sources. At some angles some of the reflections are blocked by the two light sources so that depending on the angle, more or less light sources are available for illumination.

Abstract: A circular arc illumination apparatus includes a light source section for emitting rays, a condensing optical system for condensing the rays emitted by the light source section, a rotating mirror driven by a motor and reflecting the condensed rays from the condensing optical system, and a circular arc-shaped bending mirror for reflecting the rays reflected by the rotating mirror toward a mask so that the rays become incident on the mask. The apparatus effectively utilizes light emitted by the light source section, exposes an object uniformly, and is practical and economical for exposing a large substrate.

Abstract: An off-axis optical system for collecting and condensing electromagnetic radiation utilizes an ellipsoidal reflector or a portion thereof configured so that the effects of magnification and optical aberrations (caused by the off-axis arrangement and an aspherical source envelope) are minimized. This is accomplished by the utilization of a specially designed ellipsoidal reflector having primary and secondary focal points along the major axis of the reflector or an effective reflecting portion thereof defined as that portion which is both illuminated by the source and subtended by the acceptance cone of the target.

Abstract: A highly controllable way to light target areas includes primary reflector which generates a defined primary beam in association with a light source. The primary beam, or at least a portion of the primary beam, is directed onto a secondary reflector which generates a secondary beam to the target space. The secondary reflector can be configured in any number of contours, shapes, specularities, or other characteristics to alter and control the characteristics of the secondary beam.

Abstract: A photographic flash device includes a bar-like flash discharge tube for emitting light, and a reflector having a rectangular-shaped opening for irradiating light beams emitted from the flash discharge tube toward and through the rectangular-shaped opening. The dimension of the depth of opposing side wall portions of the reflector for reflecting light beams along the long side of the opening of the flash discharge tube is longer than that of an inner part of the reflector whose cross section is a curved surface nearly substantially semi-elliptical in shape, which cross section covers the flash discharge tube. Light beams directed beyond an angle of view are reflected by the elongated opposing side wall portions so that they are kept within the angle of view. The opposing extreme edge portions of the upper and lower reflection plates along the long side of the opening of the reflector are extended toward the front by means of parallel flat reflection plates whose inner surfaces are reflective.

Abstract: A multi-purpose lamp (10) for outdoor use provides, as desired, a function of a pagoda lamp or of a projections lamp, or of a combined pagoda-projecting lamp.It includes a pole (101) for insertion into the ground, a support 102 mounted on the pole (101) in desired angular position, a bulb (107) within the support (102), a lens (104) mounted on the support (102) above the bulb (107), a convex-concave reflector (113) mounted within the support (102) and disposed below the bulb (107), and two shades (105, 106) mounted on the support (102). The shades (105) is a pagoda-type shade which comprises another convex-concave reflector (117), so as, when the pagoda-type shade (105) is mounted on the support (102) to provide a pagoda lamp performance, the reflectors (113, 117) form a pair of spaced-apart convex-concave parabolic reflectors substantially parallel to each other.The shade (106) is a ring-type shade. When the ring-type shade (106) is mounted on the support (102), the lamp (10) performs as a projecting lamp.

Abstract: A searchlight (40) includes a high-power xenon-arc lamp (12) having a longitudinal axis (16), and an anode (18) and cathode (20) which are spaced from each other along the axis (16). The lamp (12) becomes inoperative when the anode (18) is disposed below the cathode (20) by more than a small distance. A first reflector (28) is integrally movable with the lamp (12) and has a parabolic reflecting surface (28a) for collecting light from the lamp (12) and reflecting the collected light generally parallel to the axis (16) as a beam (34). A second reflector (44) is also integrally movable with the lamp (12) for receiving the beam (34) from the first reflector (28) and reflecting the beam (48) away from the axis (16) at a right angle. With the anode (18) of the lamp (12) maintained at the same height as or above the cathode (20) and the searchlight (40) rotated such that the axis (16) sweeps a 180.degree. arc from horizontal through vertical to horizontal, the beam (48) from the second reflector (44) sweeps a 180.

Abstract: An embodiment of the present invention is a luminaire for roughly uniform illumination of a square area without side glare. The luminaire uses a horizontally oriented arc tube lamp. A basket reflector surrounds the arc tube lamp and directs light out in a square pattern. A top aperture in the basket reflector is opposite to the illuminated square area. A bottom aperture, positioned in the basket reflector, permits light from the arc tube lamp to pass out to the illuminated square area. A center reflector is centrally positioned above the top aperture and has bow-tie shaped body and a pair of ends that are orthogonally oriented to the arc tube lamp. A pair of side reflectors with a plurality of faceted reflective surfaces receive light from the arc tube lamp that has been reflected from the center reflector. The side reflectors are positioned at opposite points outside the basket structure and are centered along a line perpendicular to the arc tube lamp.

Abstract: An electric lamp arrangement includes a reflector (10) having first and second mirror walls (12 and 22), which in axial sections are curved according to circular arcs (13, 23), the centers of which lie in an area between lines (15, 16) enclosing angles .beta. and .gamma. with a plane P defining the largest diameter (d), and in an ellipse-shaped area Q, respectively. The reflector has a relatively small, light-emitting window (30) of at most 0.7 d, disposed opposite a lamp base (1). An electric light source (3) is disposed within the reflector (10) near plane P and an axis (11). The reflector (10) may be integral with a lamp vessel (5) to give a reflector lamp or a pressed-glass lamp. Alternatively, the light source may have an envelope and may be secured within the reflector to constitute a lamp-reflector unit. The reflector effectively shapes radiation emitted by the light source into a wide beam of high intensity.