Abstract: A light collimizing device (10) having a light input unit (11), a first light reflection unit (12), a window unit (13) and a second light reflection unit (14). The light input unit (11) allows light rays (18 and 19) to enter therethrough. Some of the light rays (18) are reflected off of the second light reflection unit (b 14), and some of the light rays (19) are reflected off of the window unit (13). All of the reflected rays (18 and 19) are then reflected off of the first light reflection unit (12) to yield a plurality of collimized light rays (17).

Abstract: A vehicle lamp assembly is disclosed for use when the outer cover or lens element extends round the corner of the vehicle or when the outer cover or lens element is significantly larger in one or two mutually perpendicular directions than in the other. The lamp assembly comprises a light source, a light transmitting cover element and a light transmitting intermediate element disposed between the source and the cover element. The intermediate element has coaxial cylindrical inner and outer surfaces located with the light source of their common axis, one of the cylindrical surfaces carrying elongated Fresnel prism formations of uniform cross-section extending parallel to the common axis and the other cylindrical surface carrying elongate Fresnel prism formations of constant cross-section extending in respective planes perpendicular to said common axis.

Abstract: A lighting device of the free-standing type, capable of diffusing beams of light rays propagating through and emitting from the optical wave guides. A reflecting member is placed opposite the exit end of the optical wave guides to diffusingly reflect and diverge the light rays issuing from the optical wave guides thereby to light up a wide area with soft light rays.

Abstract: A lighting fixture which comprises a light reflecting fixture case having a transparent wall disposed next to an opening to provide light outflow, a light source disposed in the fixture case, and a diffuser wall covering the light outflow providing opening of the case and which is attached to the transparent wall and which reaches to at least the outer face of the transparent case wall. Thus the face of the diffuser wall can completely be used as light providing surface. Preferably, the transparent case wall is covered with a thin layer of reflecting and opaque material.

Abstract: A lighting device operable with solar beams propagating through and emitting from the optical wave guides. A pair of spaced concave and convex reflecting members are provided to effectively diffuse the solar beams issuing from the exit end of the optical wave guides. One of the reflecting members may be constituted by a mirrored electric bulb in order to ensure the lighting device to operate also by electric power.

Abstract: A device for providing a line of illumination in an optical reader, comprises an internally reflecting body having an elliptical reflecting surface joined to a part-cylindrical reflecting surface. A light source is disposed on one focal line of the elliptical surface, and a plate-like light guide has its light-receiving end disposed on the other focal line of the elliptical surface. One of the two focal lines of the elliptical surface is also the center of curvature of the part-cylindrical surface. The internal reflection and re-reflection of the light in the light guide ensures that the line of light emerging from the exit end of the light guide will be of uniform intensity throughout its length.

Abstract: A light beam concentrating, intensifying and filtering device for use in combination with a parallel ray light source is comprised of a frame having a plurality of shutter leaves capable of opening and closing an aperature when actuated. Each shutter leaf is comprised of a colourless or coloured transparent portion and a portion that is coated on its inner surface with a reflective material.

Abstract: A motor vehicle headlamp comprising in combination an optical system for recovering flux having a rectilinear focal segment and an optical system for rectifying images having a focal segment coinciding with the former and able to produce a beam of rays of controlled directivity passing through a narrow light window, while preserving a high luminous efficiency. The flux recovery system is constituted by an elliptical paraboloid, an hyperbolic paraboloid or their optical equivalents. By using various combinations of optical elements, it is possible to arrange the flux recovery system both in the axis of the rays leaving the headlamp, as well as on the side of the body work or on the lower part of the latter.

Abstract: A high intensity light table, for use with a stereomicroscope having movable rhomboid arms, has an illumination source and a reflector. The table also includes light diffusing members which are rotatably mounted thereto. The diffusing members have: (1) magnets affixed thereto which are responsive to movement of the rhomboid arms of the instrument; and (2) means therein for selectively passing a beam of high intensity illumination.

Abstract: A high intensity light table, for use with a stereomicroscope having movable rhomboid arms, has an illumination source and a reflector. The table also includes light diffusing members which are rotatably mounted thereto. The diffusing members have: (1) magnets affixed thereto which are responsive to movement of the rhomboid arms of the instrument; and (2) means therein for selectively passing a beam of high intensity illumination. An auxiliary reflector, which is rotatable about the source of illumination, may be employed to substantially increase the intensity of the beam of illumination.

Abstract: A searchlight signaling device including a housing in which is mounted an optical system for producing colored signal lights. The optical system includes an objective lens for projecting the colored signal lights through an aperture formed in the housing. A plurality of white light sources and elliptical reflectors for conveying light rays through associated colored filters for producing different color light rays. A plurality of dichroic mirrors angularly disposed in relation to the focal axis of the objective lens for intercepting the color light rays. The dichroic mirrors transmit certain color light rays and reflect other color light rays so that a given colored signal light is emitted through the aperture.

Abstract: A vandal resistant security light fixture having a housing and a light which is serviceable and removable from outside the room in which it is installed. The housing has at least one surface which faces into the room and is open at the back to permit servicing or replacement of the light assembly without having to enter the room. The fixture is vandal resistant and is particularly useful in prison cells and may be provided with one or more vandal resistant switches and vandal resistant electrical receptacles.

Abstract: A light fixture having a reflector for directing light beams generally in a first direction, such as an indirect lighting reflector, which has a tab that is partially punched out and bent to reflect a restricted spot of light in an opposite direction. This permits the highlighting or illumination of an area on the back side of the reflector without extra bulbs and without ugly add-on reflectors.

Abstract: A diaphragm having a plurality of apertures each associated with a title block on the front panel of an indicator unit is provided to cause the various title blocks to be illuminated evenly from a light source positioned behind the diaphragm. The size, number and shape of the apertures is so chosen that all of the title blocks are equally illuminated regardless of their size and regardless of their distance to the light source. Indirect light is used to prevent the formation of shadows and light spots on the title blocks.

Abstract: Optical elements for vessel navigation lights, providing improved and inexpensive means for achieving uniform, luminous intensity over a sharply bounded horizontal arc of visibility, and also for achieving a desired vertical arc of visibility, comprise means for projecting light from a diffuse source or an array or mosaic of point sources into a field the horizontal and vertical arcs of which can be precisely defined. The disclosure encompasses two geometric configurations for projecting light, symmetrical and asymmetrical, compound parabolic concentrators, each of which may be constructed as either a reflective cavity or a refractive dielectric, thereby to provide four basic designs for achieving uniform illumination over various horizontal arcs of visibility. In addition, the disclosure encompasses three modes of diffuse light projection to achieve uniform illumination over various vertical arcs of visibility.

Abstract: A luminaire comprises a high intensity light source for emitting a spherical light pattern, a redirection module for converting the spherical light pattern into a radial light pattern, and a reflector module for reflecting the radial light pattern into a controlled and substantially uniform light pattern onto a visual task field.

Abstract: A light source 2 projects light through a lens system which, preferably, has interchangeable lenses 4, 4', 4" to a conical reflecting body 6 with a reflecting surface 5, from which the light is reflected laterally to a ring reflector 8, to be in turn reflected to an operating field 17 to be illuminated. To permit distance adjustment of the operating room light fixture with respect to the illuminated field 17, a plurality of reflecting bodies 6, 6', with respective reflecting surfaces 5, 5' of different characteristics, for example a ridge surface, concave, conical or the like, are positioned on a drum for selective placement in the beam of light 7 from the lenses. Additionally, the position of the selected reflecting bodies 6, 6' with respect to the light source can be changed by locating the reflecting body on a cam follower and positioning of a camming surface with respect thereto to change the distance between the reflecting body 6 and the light source.

Abstract: An illumination system having a light source disposed along a central axis of the system is provided with a conical reflector coaxially disposed about the light source for forming an annular virtual image of an arc of the light source. A toroidal lens is coaxially disposed about the central axis for forming a circular real image of the annular virtual image of the arc at the input port of a utilization device.

Abstract: An outdoor luminaire having a reflector adapted to provide uniform illumination of a relatively large, generally level surface. The reflector is comprised of a pair of side segments and contiguous concave top and bottom segments surrounding a light center. The top segment includes three cylindrical portions which are circular in section, the portion adjacent the top edge having its circular center well in front of the light center, while the other two circular cylindrical portions have their centers behind the light center. The bottom segment includes a transient portion and a cylindrical portion which is parabolic in section. The parabolic cylindrical portion is adjacent the bottom edge and has its foci at the light center. The side segments are tilted to reflect light from the light center directly out of the luminaire.

Abstract: A guidance light including an optical system comprising a reflector having an internal concave reflecting surface formed as a surface of revolution about the optical axis. Said reflecting surface is configured so as to reflect the light from a light source onto said axis along a continuous segment thereof such that each point reflects light onto said segment at a distance from its end nearest to the light source which is proportional to the arcuate length of the reflecting surface between said point and the intersection of said surface and said axis. Exit optical means are also included to redirect the light beam in the suitable direction.

Abstract: A light reflection system for indirect lighting, such system being adapted for mounting on a wall or other structure in an office area or the like, comprising a boxlike housing having a central compartment in which the light reflection system is contained, such system including a high intensity discharge source of light, and a reflector assembly including a specially configured reflector which substantially surrounds the light source and judiciously reflects the light upwardly to the ceiling of the room being lighted; other, flat, reflectors are also included as part of the system.

Abstract: A light source is disposed within a light reflector formed to direct a light beam through an open end of the reflector and light controlling means for projecting a modified light beam from the same reflector.

Abstract: In a lighting fixture, a light source is partially surrounded by a reflector system mounted in a housing to direct light from the light source out through an aperture in the front of the housing. The reflector is cylindrically and parabolically shaped to provide a cut-off above a selected vertical angle and to provide a decreasing intensity with decreasing vertical angles from a maximum intensity to effect uniform distribution. A lens is provided in the aperture to achieve uniform distribution through a wide horizontal angle. The reflector system and the light source are pivotable within the housing about a fixed horizontal axis to adjust the vertical cut-off angle and the angle of the maximum intensity. A fixed reflector is mounted near the top of the aperture on the front wall of the housing to get more sideways distribution of the light when the light source is pivoted toward the back of the housing.

Abstract: A light fixture having an optically diffusive viewing element having a viewing area across which apparent uniform brightness is achieved from a conventional light source and reflector by utilization of a light aperture. The light aperture comprises a tralucent substrate to which a plurality of reflective surfaces are affixed so as to partially redirect light incident thereon back to the reflector. Apparent uniform brightness of the light fixture viewing area is derived by a unique method of dividing the light from the light source into varying portions of direct and indirect illumination through the light aperture as well as direct illumination from the light source and indirect reflection from the reflector to the viewing area.

Abstract: A pole-mounted, direct luminaire for providing a square, Type V pattern of light distribution. Ready access to the luminaire's internal components (e.g. reflector, transformer, capacitor) is assured by utilization of a spring-loaded, easily removable top cover. The cover includes a reflective surface thereon which aligns with an aperture located in the apex portion of the luminaire's reflector component when the cover is in the closed position.

Abstract: This invention relates to a motor vehicle headlamp lens.It is characterized in that at least one zone of ribs is formed by ribs of variable cross-section, so that the optical deflection effect varies from one point of the rib to another.Improvement of the characteristics of the beam passing therethrough.

Abstract: Luminaire with high intensity gaseous discharge lamp for illuminating a work area such as an automobile assembly line. The lamp is arranged between a concave main reflector and an auxiliary reflector facing the central portion of the main reflector. The arrangement is such that it provides adequate light control to efficiently illuminate the work area while shielding the lamp from direct view of the worker and reducing shadows on the work area due to the worker being positioned between the work and the luminaire.

Abstract: A fiber optics illuminator is described consisting of a light bulb having a fiber optics coupler or coupling means integral with the bulb envelope. The bulb is provided with a combination of ellipsoidal and spherical mirrors which together direct all light emitted from the filiment through a small optical window located at the rear of said coupler or coupling means. To facilitate trapping of the light in the optical fibers, the light is made to emerge from the optical window at angles equal to or less than the critical angle of the fibers. This invention is intended for use as a primary light source for most applications involving illumination wherein visible or infra-red or ultraviolet electromagnetic radiation is channeled by optical fibers to illuminate a specific environment.

Abstract: Lighting equipment includes three distinct spaced, parallel mounting structures held together by sheet metal in a preferably box-shaped configuration. Two outer ones of these mounting structures each include a profile having a wall thickness greater than the thickness of the sheet metal and an interior configuration corresponding to an exterior configuration of each of two arms of a lamp to be mounted relative to a pole. The central one of the mentioned elongate mounting structures has a profile including combined first, second and third walls, each of which has a thickness greater than the mentioned sheet metal thickness. The third wall is centrally located and carries a tapered-bore or other structure for connection to the pole on which the lamp is to be mounted.

Abstract: An electric lamp comprises a curved reflector having a double ended tungsten-halogen lamp disposed therein. A lens is fastened to the front of the reflector by means of a metal retaining ring. The lens has a light-modifying coating on its inner surface.

Abstract: Indoor lighting fixture providing semi-indirect symmetrical light distribution. The fixture, which is adapted to be positioned adjacent the ceiling of the room comprises a high intensity gaseous discharge lamp mounted at its base on the ceiling and extending downwardly into a box-shaped reflector open at its top with reflective sides and a diffuser panel at its bottom. Positioned in the reflector and surrounding the lower portion of the lamp is a dish-shaped semi-transparent reflector which reflects a portion of the incident light toward the ceiling and transmits a portion of the light to the area below the fixture. The arrangement is such that direct and indirect light is distributed by the fixture while shielding the light source from direct view of the room occupants to avoid glare.

Abstract: A lens assembly for a motor vehicle tail lamp assembly that gives the latter the appearance of a substantially black lighting unit. The lens assembly includes an inner lens and an outer lens each of which is formed with horizontally extending V-shaped ribs with the outer lens being made of a neutral density plastic material while the inner lens is made of a colored plastic material and has each rib thereof consisting of a substantially horizontally oriented portion and an inclined portion.

Abstract: An armored light projector is provided, having a linear light source arranged at the focal axis of a reflector unit capable of projecting a light beam of parallel rays having a substantially rectangular cross-section, the light source being mounted in a rear bottom recess of the reflector unit such as not to be directly visible from the front of the projector. The recess within which the light source is mounted is shielded by an armor assembly against direct impact of a projectile aimed at the front or at the sides of the projector. The projector has shock-absorbing suspension means capable of supporting the linear light source and affording means allowing its connection to a suitable external electric power supply. Means may be provided for protecting the rear and the top of the reflector unit against shocks and or blows, and means may be also provided for improving the cooling of the projector.

Abstract: A reflector of a photo flash device bounds a space for a light source. The space has an open side across which a light-transmissive shield extends that permits light from the source to issue through the opening at a first angle of emergence. A wide-angle light-transmissive shield is hinged to a frame of the first-mentioned shield and can be swung into and out of an operating position in which it is located in front of the first-mentioned shield and causes the issuing light to emerge at a larger angle of emergence. This permits a user to increase or decrease the area which he wishes to have illuminated when the device is operated.

Abstract: A microfiche on which a large number of characters are formed in an alternating arrangement is movable behind a mask in such a manner that at each position of the microfiche relative to the mask a desired group of characters is displayed through respective apertures in the mask. Lenses are disposed behind the apertures to project images of the characters therethrough onto a viewing screen. A reflection support member is disposed behind the microfiche and is formed with a stepped surface on which are disposed a plurality of concave reflectors, one reflector behind each lens. A lamp radiates light onto the reflectors, from which the light is reflected and focussed into the respective lenses, thereby illuminating the characters on the microfiche from behind. The radii of curvature and light receiving frontal areas of the reflectors differ in accordance with the distances of the reflectors from the lamp and the respective lenses.

Abstract: A lamp assembly has a housing of which part defines a parabolic or paraboloidal mirror and part defines part of an ellipsoidal reflector. A lamp filament is mounted at the inner focal point of the reflector and the focal point of the mirror coincides with the outer focal point of the reflector. The housing has a lens element defining a window through which light is directed from the mirror.In one embodiment, an additional mirror and lens element are provided for receiving light from the reflector. The additional mirror directing the light in the opposite direction to the light directed by the first mentioned mirror.In another embodiment, further mirrors are provided in the housing for increasing the horizontal spread of light.