Abstract: A lighting module that projects various colors, hues, and intensities of light. The device includes a light source and a reflector to direct the light along an optic path. A primary optical element reduces the cross section of effected light regions as the light enters a filter assembly area in the optic path. Filters in the filter assembly are deployed in varying combinations and to varying degrees to produce the color, hue, and intensity of light desired by the user. The refracting action of the optical element allows the filters to be physically positioned in the optic path but to have no effect on the light until the filters are rotated so that filter segments align with optical segments, and the filter changes the light being projected from the lighting module.

Abstract: A lamp assembly (12, 12A) has a lamp housing (14) and a lens (16) cooperatively forming an enclosure within which an electric light bulb (78) is disposed to place a focal point (82) of the bulb at the focus of a parabolic reflector surface (56) of a reflector (52) that is also disposed within the enclosure. The reflector collects light from the bulb and reflects it as a beam through the lens. A socket (76) that holds the bulb mounts in a rear wall (24) of the enclosure, and the reflector has a through-aperture (74) through which the bulb passes. A positioning mechanism (84) selectively positions the reflector about an axis (61) perpendicularly intersecting the bulb axis (26) to aim the light beam. As the reflector is being positioned, the bulb remains stationary, and the focus of the parabola remains at the focal point of the bulb.

Abstract: A headlight, having a bowel shaped reflector with two focal points and a lens, includes a screen shaft positioned between the lens and the reflector, a rotational axis of which extends horizontally and at a right angle to an optical axis. The screen shaft is adjustable to a plurality of rotational positions and has in each rotational position a focal line, which produces a light-dark border of a light pattern. A mantle surface of the screen shaft has at least one surface portion which connects two focal lines which extends irregularly to, and deviates from, a cylindrical surface.

Abstract: Architectural luminaries utilize a common optical engine having a lamp coupled to an ellipsoidal reflector, a field stop aperture, and image-projecting lenses A color wheel, gobo wheel, and mechanical dimmer may also be included. A microlens element converts a spotlight optical engine into a wash light optical system. A multiple lens array provides variable diffusion. The optical engine is combined with an X-Y scanning mirror beam direction system in a substantially recessed housing for mounting in the ceiling of a building. The optical engine is combined with a pan-and-tilt yoke for greater range of coverage with an exposed luminaire.

Abstract: A palm size laser indicator disk capable of adjusting the shapes of light emitted therefrom includes an adjustment ring, a disk cover, a disk, an annular lens, a laser generating component, and a plurality of connecting screws. By turning the adjustment ring, one of a plurality of patterns of high transparency and different shapes may be caused to be penetrated by the laser light to generate different light shapes.

Abstract: A light altering device includes a housing and at least one moveable element coupled to the housing with each of the moveable elements having a light modifying device capable of changing some aspect of a beam of light. A moving control element moves the moveable element(s) relative to the housing between a first stowed position where the light modifying device of the moveable element does not interfere with the beam of light, and a second active position where the light modifying device does interfere with the beam of light. The housing of the light altering device can rotate a lighting effect produced by the moveable element in the second active position. Methods of modifying light with the device are also disclosed.

Abstract: A system for supplying optical power uses an optical switch or shutter at the handpiece. The optical switch is positioned between an open light-transmitting position and a closed light-reflecting position. A detector at the base of the system can be used to detect the position of the optical shutter in some situations. This can be used to control the operation of a high-intensity light source. In this manner, the system can be controlled at the handpiece without using electrical power at the handpiece.

Abstract: A lens for use in a light fixture provided to project a beam of light in a first light pattern having a first cross-sectional geometry. A lenticular lens element is supported in the fixture and movable into a position to interrupt the beam of light for selecting beam shape by altering the first projected light pattern from the first cross-sectional geometry to a second cross-sectional geometry different from the first geometry and for moving the second pattern to a desired orientation. The lens element may be carried by a disc rotatably mounted in the fixture. The disc may carry a plurality of lens elements which can also change the orientation of the projected light patterns.

Abstract: A lighting module that diffuses a light beam to modify the size and shape of the projected beam. The device includes a light source and a reflector to direct the light along an optic path. A primary lens element reduces the cross section of an effected light region as the light enters a diffusion assembly area in the optic path. Diffusion elements in the diffusion assembly are deployed in varying combinations and to varying degrees to produce the shape and/or size of light beam desired by the user. The action of the lens element allows the diffusion elements to be physically positioned in the optic path but to have no effect on the light until the diffusion elements are rotated so that diffusion element segments align with lens segments, and the diffusion element changes the light being projected from the lighting module.

Abstract: A system for controlling the divergence and directionality of a beam of electromagnetic radiation having a source of electromagnetic radiation for producing the beam, a conveying mechanism for conveying the beam in a preselected direction, and wherein the source of electromagnetic radiation is positioned proximate one end of the conveying mechanism. At the other end of the conveying mechanism is a distribution component for distributing the beam therefrom. The distribution component has a reflective element for receiving the beam from the conveying mechanism and directing the beam with at least one preselected divergence to a plurality of different locations. In addition, the conveying mechanism and the distribution component can also affect the divergence of the beam being output therefrom.

Abstract: The laser pointer of this invention includes: a laser pointer main body for emitting a visible laser beam; and a deflection optical element disposed on the central axis of the laser beam and adapted to deflect the direction along which the emitted laser beam passes.

Abstract: A color wheel for lighting fixtures comprising a hub wherein removable, user-selected dichroic filters are engaged by a spring element. The filters are removably held by two pegs extending upward and one nub extending downward. The filters can be lifted for removal.

Abstract: An illumination device for an interior space, such as that of a motor vehicle, for example, has a light source (2) and an opposing reflector system (3) located at a distance across the interior space, wherein the reflector system includes a reflector unit having multiple reflectors (8, 13, 14, 15, 16) each capable of being brought into a position in a beam path (7) of light from the light source (2). The light source (2) can be placed in a center control panel (4) of the motor vehicle, while the reflector system (3) can be placed on a vehicle ceiling located opposite the center control panel (4).

Abstract: A picture illuminating device for mounting on the wall above the picture, or on the back of the picture frame. The device utilizes a fluorescent light tube to produce uniform lighting and is powered by conventional or rechargeable batteries which eliminates the requirement of electrical outlets and the spectacle of exposed electrical cords extending down the wall. The device is composed of a stem and a shade. The shade houses the fluorescent light tube, batteries and the electronic circuit that converts the direct current from the batteries to the alternating current required to power the fluorescent light tube. The shade includes a reflector which is configured to mount the fluorescent light tube and batteries so that the shade covers the fluorescent light tube adequately to prevent any glare from the front while presenting the look of a conventional, corded picture lamp.

Abstract: A light distribution system for distributing beams at remote locations, light beams from a quasi point source includes means for collimating light from the source into a radial beam or beams, conveyance means carrying collimated beams to remote illumination directors for directing light from the light distribution system to a volume to be illuminated. Light loss due to changing the system from a first configuration, i.e. set of spatial location spatial locations of illumination directors, to a second configuration is substantially eliminated. Means are provided to manipulate light beams to control their diversion and continuity in response to movements from changing from the first configuration to the second.

Abstract: A turret assembly is provided for use with a light box for supporting and indexing a plurality of fiber optic bundles relative to a light source contained within the light box. The turret assembly includes a supporting element having a plurality of openings for retaining a plurality of fiber bundles which is rotatably attached to a hub member mounting the turret assembly to the light box. The turret assembly also includes a light intensity control member for adjusting the intensity of light entering each indexed fiber optic bundle from said light source. The intensity control member is fixedly attached to an adjustment knob which independently rotates a light vane positioned in the light path extending from the light source in order to selectively to vary the illumination output therefrom.

Abstract: An emergency vehicle signal light adapted to be mounted on an emergency vehicle. A light source emits visible light for illuminating a reflector. A light pipe having one end associated with the light source has its second end associated with a diverter for diverting substantially all light transmitted by the light pipe toward the reflector. The reflector is adapted to reflect the diverted light transmitted by the light pipe for observance by an observer remote from the emergency vehicle. A motion driver may be provided for rotating or oscillating the reflector about the diverter. As a result, an observer is adapted to observe discrete flashes of light resulting from flashing, rotation or oscillation, each flash corresponding to diverted reflected light forming a beam. For oscillating or rotating modules, the beam traverses across the position of the observer in response to the rotational or oscillatory motion. Alternatively, such modules may be used as part of a light bar.

Abstract: Apparatus for providing a visual indication of the horizontal and vertical orientation of a movable component of a headlamp assembly wherein said headlamp assembly is of the general type including a stationary housing and a movable reflector component, said movable component being pivoted to the stationary housing for movement in the vertical and horizontal plane by means of a stationary universal pivot and a vertical adjust mechanism vertically spaced from said stationary pivot and including a universal pivotal mounting to said movable component, and a horizontal adjust mechanism horizontally spaced from said stationary pivot and including a universal pivot effecting operative connection to said movable reflector component. The stationary universal pivot and said horizontal pivot define the vertical pivot axis for said component. Further said stationary universal pivot and the horizontal adjust pivot in effect defining a vertical pivot axis about which said movable component is pivoted in the vertical plane.

Abstract: An adjustable beam flashlight according to this invention is based in part on the teachings of Ellion U.S. Pat. Nos. 4,984,140 and 5,459,649 but adds important new concepts to describe a theoretical reflector having a broad beam that is uniformly illuminated with no bright and dull rings and no unilluminated center disc. This theoretical reflector requires manufacturing tolerances that are not available with conventional machine tools. A method is described to modify this theoretical reflector so that a practical reflector can be produced using existing machine tools. In one embodiment, the practical reflector surface is made up of a multitude of small concentric cones which reflect the light in the form of small fans. A uniformly illuminated broad beam is formed by fabricating specific groups of these cones of varying size and slope to form the reflector surface in order to project the light so as to overlap the required number of fans to produce the uniformity of illumination.

Abstract: An illuminating optical system including a light emitting device for supplying illuminating light, a directing member for directing the light beam from the light emitting device by refracting action, and a moving device for moving at least one of the light emitting device and the directing member in a direction differing from the direction of the optical axis of the directing member and varying the spacing between the light emitting device and the directing member to thereby vary the illumination range at a predetermined distance.

Abstract: The illumination of a photolithographic projection imager is given a variable annular intensity profile by using diverging and counter diverging elements that are movable relative to each other in the illumination path. An upstream element diverges the illumination into an annular configuration, the radius of which is set by the distance downstream to the counter diverging element. Convex and concave conical surfaces on the movable elements can accomplish this.

Abstract: The stator of an electric motor is provided by coils 22 disposed in an interrupted-annular array about a central space such that a path A through the array is provided whereby a selected one of a plurality of rotors 21 can be moved in the plane of and through the array into and out of said central space. In the preferred embodiment each rotor 21 is a gobo freely rotatable on a wheel which can be indexed to bring it into a light path, when it will be positioned to be rotated when the coils 22 are energised. The non-annular disposition of the coils 22 results in a motor of low torque but it is is adequate to rotate a gobo disc, which is simply a perforated sheet of metal. As applied to a disco lighting unit the motor of the invention provides a much cheaper and simpler drive arrangement for gobo discs.

Abstract: A dual functional lamp is provided wherein a mirror base having a reflective mirror is disposed above the shade of the lamp. The mirror base is connected to the supporting bracket. The mirror base can be suitable adjusted such that the light emitted from the incandescent bulb can be reflected to a desired location to increase the luminance thereof, consequently the reader may read a book with sufficient luminance.

Abstract: The present invention provides a retractable projector wherein a connector for securing together the reflector and the upper cover of the projector ensures both convenience and security of the projector. Such projector includes a casing housing therein a light source emitting a light for illuminating a projected object; a reflector mounted in said casing for reflecting said light to said object; an upper cover mounted on said casing for supporting thereon said projected object and for passing therethrough said light reflected from said reflector to said projected object; and connector for securing together said reflector and said upper cover.

Abstract: An asymmetrical lamp has a main lens (2), a reflector (3) and at least one light source arranged between the reflector (3) and the main lens (2). In order to achieve a uniform illumination of all areas of an object, even when the lamp is not positioned on an axis extending 90.degree. to the object, the light source (1) and the reflector (3) are offset from an optical axis (6) of the main lens (2). The main axes (4, 5) of the light source (1) and the reflector (3) are, further, inclined to the optical axis (6) of the main lens (2). Preferably, the offset of the light source (1) and the reflector (3) relative to the optical axis (6) of the main lens (2), and the inclination of the main axes (4, 5) of the light source (1) and the reflector (3) to the optical axis (6) of the main lens (2), is adjustable so that the lamp can be optimally adjusted.

Abstract: The headlight has a gas discharge lamp and a reflector. The reflector has an upper reflector region and a lower reflector region. A lens is arranged after the reflector in a light outlet direction, and a screen device is provided between the reflector and the lens. A movable screen member of the screen device is adjustable between a position for low beam in which it screens light reflected from the lower reflector region and produces a bright-dark limit, and a position for high beam in which light reflected from the lower reflector region passes past the screen member and can exit the headlight. Moreover, the movable screen member in its position for low beam is adjustable between a position for right traffic and a position for left traffic. Therefore the head light can be used in a simple manner as a high beam head light and a low beam head light, and also can be converted for the utilization for right traffic and left traffic.

Abstract: A recessed light fixture for a ceiling includes a trim ring, a pivot ring mounted on the trim ring for rotation about a vertical axis, and an enclosure portion rotatable about a horizontal axis intersecting the vertical axis. The enclosure portion includes upper and lower enclosures. The upper enclosure carries a lamp socket in horizontal offset relationship to the vertical and horizontal axes. The lamp socket defines a longitudinal axis which coincides with a center axis of a downwardly open circular mouth of the lower enclosure. The lower enclosure intersects the upper enclosure to form therewith a circular waist. Each of the upper and lower enclosures have a cross-sectional area increasing in size in a respective direction away from the waist. A center axis of the waist intersects the center axis of the mouth at an oblique angle.

Abstract: A rechargeable metal arc flashlight having a light generating assembly which utilizes a metal halide arc lamp mounted inside an elliptical reflector for focusing emitted light onto a diffusion screen. The flashlight utilizes a moveable collimating lens disposed in front of the screen to focus light from the screen into a collimated beam or a floodlight which is passed through a UV blocking filter. The flashlight includes a rechargable self-contained power source for igniting and sustaining ignition of the arc lamp.

Abstract: The headlight for a self-propelled vehicle includes a pivotable reflector (12) having a reflector pivot axis (20), a holder (10) for the reflector (12) and a compact mechanism for pivoting the reflector (12) relative to the holder (10) to adjust the orientation of the reflector. This compact adjusting mechanism for the reflector includes an adjusting element (26) having a ball end (30) and eccentrically engaged with the reflector (12) relative to the reflector pivot axis (20) and a compact double-jointed pivot joint for pivotally connecting the adjusting element (26) with the reflector (12). This compact double-jointed pivot joint includes a pivot joint mount (36) provided with a spherical receptacle (42), a socket insert (50) having a spherical-segment-shaped outer section (52) pivotally engaged in the spherical receptacle (42) of the pivot joint mount (36).

Abstract: The headlight has a reflector which is mounted inside a casing for swiveling about a swivel axis extending approximately in a horizontal center plane of the reflector, close to the apex region of the latter. The front edge, pointing in the light emission direction, of the reflector has an at least approximately circular arc shape in planes at right angles to the swivel axis and the center point thereof is arranged at least approximately on the swivel axis. The casing has a part whose edge pointing opposite to the light emission direction adjoins the front edge of the reflector and, in planes at right angles to the swivel axis, likewise has an at least approximately circular arc shape, and whose center point is arranged at least approximately on the swivel axis. Because of this design the gap between the casing part edge and the front edge of the reflector can be kept small, since when the reflector makes a swiveling movement about the swivel axis, the gap varies only slightly or not at all.

Abstract: An adjustable elongated luminaire or elongated luminaire system, and a respective adjustable mount or mounting system therefor, that further minimizes dark spots in the lighting pattern, while allowing easy installation and adjustment, and providing a more effective braking mechanism, as compared to previously known systems, are provided. In a preferred embodiment, each luminaire has a hole at one end and a projecting stud at the other end. A mounting bracket for each end has a corresponding hole or stud. Where two adjacent luminaires meet in a luminaire system, the mounting bracket has a hole, and the stud of one luminaire extends through the hole in that mounting bracket as well as the hole in the adjacent luminaire. Brake mechanisms to lock one or more luminaires rotationally, and alignment mechanisms to lock multiple luminaires in a system into common alignment, can also be used.

Abstract: A high intensity light projector for stage, architectural and similar applications includes a controllable image quality projection gate providing advanced visual effects. The projection gate, capable of selectively scattering or transmitting incident light, may be constructed of an array of scattering liquid crystal material in combination with infrared and ultraviolet reduction means which provide in the high intensity beam, a stable thermal environment by minimizing the absorption of light by the projection gate. Additional thermal efficiency is provided by supplemental cooling means. Color control is also provided in the form of dichroic filter wheels forming cooperating adjustable low, high and band width filters including saturation control. A color measuring feedback sensor is also provided. An intensity measuring feedback sensor controls a spatially-modulated, variable-density, reflectively-coated dimming wheel. A programmable gobo system has provisions for gobo selection, orientation, and rotation.

Abstract: A lighting fixture with an adjustable reflector that will move to many different positions relative to the lamp and can be installed without tools and adjusted between positions with only one hand. The invention operates with an outwardly facing set of V-shaped notches at a first end of the lamp which mate with and an inwardly facing set of biased fingers at a first end of the reflector. The reflector is adjusted by manipulating it in a radial direction, thereby causing the biased fingers of the reflector to move across the V-shaped notches at the first end of the lamp.

Abstract: A hand-held strobe light which may be used in rescue or emergency operations in peacetime or in a combat zone. The light includes a watertight housing with a high intensity bulb which flashes white light. Interchangeable blue and infrared filters attached to a flash guard body can be used with the bulb for filtering various wave lengths of light spectrum in combat situations and for both 360 degree or line-of-sight transmission.

Abstract: An adjusting apparatus for one or more headlight reflectors (1) has first and second miter gear mechanisms (4, 12), each of which includes a toothed-gear pair. The reflector can be pivoted about an axis by a rotation device, or knob, on the exterior of the housing. The two miter gear mechanisms are coupled by means of a rigid shaft (13) which is positioned in a bearing box (9) formed in a housing rearward wall (7). The shaft carries at each of its free ends a shaft toothed-gear of the respective first and second miter gear mechanisms and is held radially in the bearing box by means of girding elements of the toothed-gears (5, 15) whose teeth engage with the teeth of the shaft toothed-gears.

Abstract: In lighting fixture such as an exit sign, a light emitting diode lighting device is provided for mating engagement with an electrical socket of the lighting fixture. The light emitting diode lighting device has a plurality of light emitting diodes with a light directing member spaced therefrom for directing light into a desired illumination pattern. The light directing member can be wedge or parabola shaped.

Abstract: A flashlight which selectively provides an enhanced spot beam and fully illuminated broad beam. The modified parabolic reflector produces with either a point source of light or an extended filament source of light a spot beam which is substantially more uniform across its disc as is produced by a conventional parabolic reflector, and a greatly improved broad beam without unilluminated areas. Further, the range of distance in which these effects are provided is importantly increased.

Abstract: A motor vehicle headlamp comprises a housing which encloses a lamp, a mirror cooperating with the lamp so as to define a light beam, and a cover glass, together with adjustable mounting means to enable the orientation of the beam to be varied, these mounting means comprising an adjusting member which is displaceable in translation with respect to a fixed part of the vehicle, together with an orientation indicating means. The orientation indicating means comprise a graduated element carrying a scale, together with an indicating element having a pointer, these two elements being adjacent to each other and both mounted on the outside of the housing; and means for carrying one of these two elements in such a way that it is displaceable in translation with the adjusting member, with a further means carrying the other one of the said elements on the fixed part of the vehicle. One of these carrier means is adjustable in the direction in which the adjusting member is displaceable.

Abstract: The illumination of a photolithographic projection imager is given a variable annular intensity profile by using diverging and counter diverging elements that are movable relative to each other in the illumination path. An upstream element diverges the illumination into an annular configuration, the radius of which is set by the distance downstream to the counter diverging element. Convex and concave conical surfaces on the movable elements can accomplish this.

Abstract: A light device for vehicles has a housing mountable on a vehicle part and a light adjustably received in the housing. The housing is provided with a region which is curved in an adjustment direction of the light and the light abuts against the region. At least one mounting element extends through the housing and fixes the light so that when the mounting element is released, the light is displaceable inside the housing along the curved region, and a control element is arranged outside of the housing and follows an adjusting movement of the light. The control element is provided with indicating means for indicating an orientation of an optical axis of the light.

Abstract: A photographic lighting system provides both direct and modified light to a target from a single light source. The light source itself comprises an electrical bulb having an electrical connection inner end, a light emitting outer end and a light emitting sidewall between the inner end and the outer end of the bulb. The system further includes a mounting assembly which mounts the bulb in the system and the system includes a light modifying material fitting region which receives material positioned to modify light emitted from the side wall while allowing direct light to be emitted from the outer end of the bulb.

Abstract: For recessed lighting fixtures, particularly those mounted in ceilings, the present invention provides an easily attached removable accessory device for deflecting a portion of the light path in a selected direction that differs from the original direction, e.g. deflecting downwardly directed light to a substantially horizontal direction. A mirror assembly, typically having two round flat reflecting surfaces, one on each side, is supported by a wire hanger element via an axle portion passing diametrically through the mirror; the hanger element has a pair of hooks at the upper ends of two side wires that engage the recessed light fixture at any desired orientation around the axis of the fixture. The mirror can be tilted to any angle, and is retained at the selected tilt angle by friction of the wire axle being clamped between of a pair of resilient pads.

Abstract: A luminaire has at least four reflectors which may be individually pivoted about an axis provided by a screw that the distribution of light emitted by a lamp located within the envelope of the reflectors may be altered and fixed to suit the environment that the luminaire is to illuminate.

Abstract: The high output luminaire of the invention is capable of lighting a specific and determinable area defined by front and rear light shields. A reflector is mounted inside of a housing to forwardly direct light from a lamp positioned therein. The housing includes a hinged, waterproof access door having a transparent portion through which light from the lamp is shown. Adjustable front and rear light shields decreases the front and rear beam spread angles to confine the light from the luminaire to a chosen area.

Abstract: A vehicle lamp device includes a tiltable reflector mounted in a housing; a back opening formed in a back wall of the housing; a rubber cover for sealing a gap between the back wall and a back portion of the reflector; a cylindrical portion surrounding the back opening formed on the housing back wall; a cylindrical supporting wall formed on the back wall, the supporting wall being spaced outside the cylindrical portion surrounding the back opening and extends backward; an annular groove formed between the back-opening-surrounding portion and the supporting wall; a set ring member having a flat set face, for pressing the rubber cover to the housing back wall from behind; an inward-jutting projection formed on the supporting wall, for supporting the set ring member; a peripheral portion of the rubber cover provided with a horizontally-extending cylindrical portion to be inserted into the annular groove and a to-be-sandwiched potion perpendicular to the to-be-inserted portion of the rubber cover; and an inward-e

Abstract: A headlight for a vehicle has a housing having a light outlet opening, a transparent light disc covering the light outlet opening, at least one reflector arranged in the housing and provided with a reflecting inner surface so that the reflector being turnable relative to the housing at least in a vertical plane, and a water level for controlling an inclined position of the reflector and visible through a part of the light disc from outside of the headlight. The water level is arranged in the region of the reflecting inner surface of the reflector and visible through a region of the light disc which extends over the light outlet opening of the housing transverse to the direction of light exiting the headlight.

Abstract: An adjustable beam light fixture with glare light shielding for illuminating a selected area without illuminating other areas. The adjustable beam light fixture has a reflector for holding a lamp and directing light from the same. The reflector is adjustably mounted on a housing. The mounting is accomplished by means of slots formed in the reflector and threaded fasteners extending outwardly from the housing and into the slots. The portion of the reflector adjacent the housing is arcuately shaped and a portion of the housing adjacent the reflector is arcuately shaped as well and with the same degree of arc. In the preferred embodiment, the housing includes means for mounting the adjustable beam light fixture on a surface.

Abstract: An automotive-type projection headlamp having a substantially elliptical reflector, a light source (bulb) located at the first focal point of the reflector, a projection lens disposed in front of the reflector, and a shade located at a position near the second focal point of the reflector for partially intercepting light passing from the reflector toward the projection lens. The shade is rotatable about a horizontal support shaft, and has a circumferential surface spirally shaped as seen in a longitudinal sectional view, so that the distance from the center of rotation of the shade to a point on the circumference thereof gradually varies. The vertex of the shade is vertically varied by turning the shade about the horizontal support shaft, thereby controlling the distribution of the output light beam.

Abstract: A projection head lamp for vehicles comprises a substantially elliptical reflector 14, a light source located at the first focal point of the reflector 14, a projection lens 16 disposed in front of the reflector 14, and a shade 20 located at a position near to the second focal point and the focal point of the projection lens 16, the shade 20 intercepting light beams going from the reflector 14 toward the projection lens 16. The shade 20 may be turned about the horizontal shaft. To adjust the beam distribution pattern, the shade 20 is turned. The shade 20 consists of left and right shades 21 and 22, which are separated and horizontally extended when seen from the point right under the optical axis. The shades 21 and 22 have pairs of shade plates 212 and 213, and 222 and 223, of which the extended parts extending along the horizontal shaft overlap with one another.

Abstract: What is described is a compact, light weight and relatively small theatrical search lighting system which includes a frame having a rectangular base and four legs which embrace a lamp and its reflector, and two containers for ballast and a data receiver. Also mounted to the frame is a scroller and a motorized mirror for reflecting the light from the lamp. The frame may be suspended from a truss, or because of two projections attached to two legs and a tail, the system may be rotated through 90 degrees and positioned in a generally vertical condition if desired.