Abstract: A miniature spotlight for short distance illumination and optical effects producing an extreme variable exit angle of illumination and maintaining a constant even field of illumination is of such complex configuration that the use within a stage set or hidden behind small objects will be suitable for photographic and cinematographic close-up settings.

Abstract: A loud-speaker is combined with a device for producing lighting speakers is covered by two discs provided with openings and, for example, being formed of a grating. The inner disc of the discs, which is facing the speaker cone is rotatable, whereas the outer disc is stationary. Rotation of the rotatable disc is driven either via a motor or via driver members fixed to the speaker cone of the loud-speaker which are actuated by transmission of the vibrations of the speaker cone to the rotating disc in order to provide rotating movement. Light sources for illuminating the surface of the inner or, respectively, outer disc, which is facing the light sources, are provided either within the speaker cone or outside of the loud-speaker. The lighting effects are then generated by the rotation of the inner disc.

Abstract: A lighting fixture includes a source for producing a beam of light and pair of color wheels. Each of the color wheels has a plurality of dichoric filters mounted on the periphery of the wheel with the filters positioned contiguous to each other. The light beam is directed to a focal point. Each of the color wheels can be rotated to place the peripheral dichroic filters in position to intercept the beam. One of the color wheels is equipped with long wave pass dichroic filters while the other color wheel is equipped with short wave pass dichroic filters. By aligning various combinations of these filters, a large number of different colors with different saturations can be produced. The cutoff wavelengths for the dichoric filters are selected to be different at the long and short wavelengths of the filter set, such that there is produced a perceived uniform graduation of colors across the spectrum.

Abstract: A masking system for masking the viewing area of a radiograph light box comprises a pair of spaced, endless belts disposed in substantially perpendicular relationship. Each of the belts has spaced opaque regions and spaced transparent regions connecting the opaque regions. The belts are supported on rollers and are movable to selectively position portions of the opaque regions into alignment with the edge regions of the image support.

Abstract: A lighting device comprises a light source adapted to produce a light beam. A reflective mirror is disposed behind the light source. The device also comprises a plurality of optical lenses and a plurality of colored filters. The light source comprises at least one filament and has at least one dimension greater than six millimeters in the direction in which the filament is disposed. The colored filters are movable and adapted to be inserted totally or partly into the path of the light beam. They are disposed on the opposite side of the plurality of optical lenses to the light source. An adjustable iris diaphragm is inserted between certain lenses of the plurality of lenses, on the path of the light beam.

Abstract: A luminaire utilizing a source of light which is reflected outwardly from the luminaire by a first and second reflector in side-by-side configuration. The second reflector is also positioned to one side or in surrounding relationship to the source of light. The light from the first reflector is adjusted to reinforce light coming from the second reflector in a predetermined direction.

Abstract: A roadway luminaire utilizing a source of light which is reflected outwardly from the luminaire by a first and second reflector in side-by-side configuratuion. The second reflector is also positioned to one side of the source of light. The light from the first reflector is adjusted to reinforce light coming from the second reflector in a predetermined direction.

Abstract: A lighting fixture which may be installed under a shelf or cabinet positioned above a working area or positioned above any area in which illumination is sought. The lighting fixture is capable of easily and effectively directing the light to specific locations within the working area. A florescent tube is disposed along the length of the fixture. It has a reflector located above it. Below the florescent tube there is an elongated perforated metal panel covering approximately one-third of the light opening below the tube. The panel may be moved transverse to the length of the tube along the opening to direct the light from the tube. The panel is preferably formed of one fixed and one identical overlapping, movable, perforated metal panel. The movable panel may be moved parallel to the length of the tube to control the amount of light passing through the panels. The fixture is provided with cord storage in the middle of the back of the fixture. The ballast is mounted via a closed cell foam pad.

Abstract: A universal filter changer for theatrical lighting units comprises a casing, a mechanism for attachment of the filter changer to the lighting unit, a set of filter holders with lighting filters, and a unit for switching the filter holders with filters between two extreme positions. This unit of a set of identical switching mechanisms the number of which corresponds to the number of the filter holders. Each mechanism is formed by a movable part which can rotate with respect to a stationary part by means of an electromagnet which controls a mechanism which in turn prepares fixing pawls for fixing the movable part, and hence the respective filter holder, with a filter in one of extreme positions of its rotation. With the use of such mechanism, the filters can be selected in any random sequence as well as in any combination. The mechanism can be controlled manually via a remote control panel or interfaced to a microprocessor-based controller.

Abstract: A multi-function dental operating light source comprises a plurality of optical filters and reflectors mounted upon a turntable at spaced locations around the periphery thereof, the turntable being rotatable to different predetermined positions relative to a collimated light source to produce selectable different modes of light delivery. The optical filters are adapted respectively to produce light beams for shade-matching, no-cure to prevent polymerization of light-curable resins when exposed to said light for observation purposes, a photocuring light beam, and beams for oral illumination and transillumination. The photocuring light is preferably developed by condensing the collimated light through a light-condensing cone or through an optical condensing system, the condensed light being delivered either directly from the condenser output or through a light pipe arrangement.

Abstract: A modulated optical radiation beacon, e.g. a flashing light beacon or an IR emmissive missile jamming source, can comprise a radiation source and two relatively movable apertured masks which, as the apertures thereof move into and out of registration, pass or block the radiation from the source. Herein, to improve the uniformity of the polar distribution of the emitted radiation (assuming, of course, that a uniform distribution is required) or, in other cases, simply to improve efficiency, the apertures of the `inner` mask, i.e. the one nearest the source, are bounded by curved reflective surfaces defining an optical cavity which at least crudely images the source at a position near the outer mask. Advantageously, the optical cavities are defined by a spaced array of prismatic members having appropriately curved facing surfaces.

Abstract: There is disclosed an adjustable light reflector to be used in combination with an illuminating device for the purpose of reflecting light into almost any desired direction which comprises of a hood having a reflective surface on the underside of the top surface, said top surface having arms attached on either side, said arms extending downward and each arm having a rotatable attaching means receiver and latch receiving means on the lower end; a collar means having made thereupon two rotatable attaching means, each said means being rotatably engaged with a rotatable attaching means receiver; an illuminating device casing having latch means, hood receiving means and a collar means receiver, said collar means receiver positioned near the light emitting end and concentric to the longitudinal axis of the said illuminating device casing, the collar means receiver to rotatably receive the collar means, the latch means to engage the latch receiving means and the hood receiving means to receive the hood.

Abstract: A ceiling light fitting has three extended, constant-section reflectors which are parallel to the wall, the reflector being swingable back to enable the lamp to be changed. The lamp filament is linear and parallel to the wall. The reflectors are of part-circular section and enhance the light, as well as the reflector acting as a mask to prevent the filament being seen from behind the fitting. The reflector projects very little below ceiling level. The reflector is parabolic with the filament at its focus, the axis of the parabola being directed at the base portion of the wall. The reflector faces downwards and has at least its major part above the level of the filament and on the wall side of the filament.

Abstract: A variable magnification "zoom" spotlight assembly is disclosed in which the diameter and focal length of the focusing lens and object lens are selected so that the angle of incidence of a light ray as it emanates from the lamp and reflector of the assembly and thereafter from the focusing and objective lenses decreases by a constant factor. This angular relationship is established by selecting the diameter and focal length of the focusing lens and objective lens and the diameter and length of the reflector according to the following angular relationship:B.sub.R /B.sub.F .congruent.B.sub.1 /B.sub.R .congruent.B.sub.2 /B.sub.1 =kWhere:B.sub.F =angle of the filament to reflector as measured from the focal axis;B.sub.R =angle of gate to reflector as measured from the focal axis;B.sub.1 =angle of focusing lens as measured from its focal length along the focal axis to its radius;B.sub.2 =angle of objective lens as measured from its focal length along the focal axis to its radius; and,k=constant.

Abstract: A multi-function dental operating light source comprises a series of optical filters and flat reflectors mounted upon a turntable at spaced locations around the periphery, the turntable being rotatable about a fixed axis relative to a stationary tungsten halogen lamp having a parabolic reflector and including stationary spherical mirrors mounted to reflect light forward.

Abstract: A light reflector for specific use in combination with an elongate light source such as a fluorescent lamp. It has a plurality of reflecting surfaces disposed behind and symmetrically of the light source and includes opposed central tangent reflecting surfaces. The cumulative effect of the reflecting surfaces is to synthesize the light rays emitted upwards with those emitted downwards by the sourve towards the area to be lighted.

Abstract: A variable mask device for use with an illuminator comprising a projection window, a plurality of variable mask plates for optionally varying the size and shape of the projection window and means operatively connected to said variable mask device for inclining said mask device with respect to the projection axis within a predetermined angular range. Means are also provided for rotating the mask device around the projection axis.

Abstract: The present invention provides a spotlight adjusting system for controlling the beam of a spotlight. A ellipsoidal reflector-lamp assembly is movable to a plurality of positions relative to the iris. The diaphragm of the iris is independently adjustable to a plurality of positions so that the light being reflected from the focal area of the reflector assembly can be controlled between passing the full beam received at the iris to a portion of the beam received there. The rear lens is adjustable relative to the iris and the front lens. The system provides mounting structures for both a long throw and a short throw front lens so that the system can be selectively mounted with either a removable long or short focal front lens.

Abstract: A subtractive filter having three elementary filters, each comprising a fixed cylindrical central portion having at its center a channel for the passage of the light and on its surface a radial milled slot; a rotary ring concentric to the said fixed cylindrical central portion having a graduation on its central periphery, the inside of said rotary ring having the shape of a logarithmically progressive ramp; and a filter holder comprising a frame adapted to slide in the said radial milled slot in the fixed cylindrical central portion, the bottom of said frame having the shape of a rounded point which rests against said ramp and the top of said frame having a spring resting against a part fastened to the periphery of the fixed central portion, said frame of said filter holder comprising at its top a window opening and at its bottom the filter. Regulation of light passing through each of the three filters is accomplished by rotating the rotary rings.

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: Generator having a light source of high intensity which is passed through colored filters and into fiber optic bundles, the ends of the bundles being moveable relative to a kaleidoscope-type projecting lens.

Abstract: A light-gathering device for transmitting through fiber optic bundles, the light emitted by an electronic flash along with the light from a continuous light source so that relatively small objects may be lit so as to photograph them. A first housing (8) is provided, designed to receive a flash tube (1) of an electronic flash unit, and a "model"(3) emitting continuous light, the first housing (8) being enclosed within a second housing in which there are several openings for inserting the ends of fiber optic bundles (2) whose opposite ends are used for illuminating the object to be photographed. Manual shutters (5, 6, 7) are provided for varying the light intensity from the flash tube to the fiber optics (2). This light gathering device is suitable for taking top-quality color photographs which have the desired lighting effects.

Abstract: Two nested downwardly diverging frustoconical lamp shades are supported at their upper ends by a base which also supports a lamp bulb. The shades have openings therein which, when aligned by adjustment of one of the shades, passes a beam of light from the bulb to a reading or like area. The intensity of illumination can be controlled by changing the extent of overlapping of the openings. Shade elements extend across the lower ends of the shades and have openings therein. One of the shade elements is adjustable relative to the other to move the openings therein in and out of register with the openings in the other element whereby to vary the intensity of illumination of light projected downwardly by the lamp bulb.

Abstract: In a vehicle headlamp, a light deflecting system is provided which comprises two plate-like transparent deflecting elements. Each element has a series of parallel fibs, and the elements are movable one relative to the other at right angles to the length of the ribs. The profiles of the ribs are so chosen that, in a neutral position of the deflecting elements, each rib on one deflecting element faces a rib of complementary shape on the other deflecting element, so that the system imposes no net deflection on light rays passing through. To produce a deflection of these rays, the deflecting elements are shifted relative to the other, so that then, the deflection suffered by the light in passing through one deflecting element is not wholly cancelled by the deflection suffered in passing through the other deflecting element; by suitable choice of the profile of the ribs, the net deflection is the same for all the deflected rays.

Abstract: An illuminating device for providing a light beam having a substantially uniform cross-sectional flux comprising a light source, an optical conductor, the optical conducting having an inlet and an outlet surface and a curved body portion therebetween, the curved body portion forming at least substantially a portion of a circular ring, optical means for directing light from the light source to the inlet surface of the optical conductor, and means affecting the flux of light arranged transversely and displaceable to the path of the light beam between the light source and the inlet side of the optical conductor whereby the optical conductor provides the uniform flux at the outlet surface.

Abstract: A vehicle headlamp is constructed with its reflector and front lens adapted to be fixedly mounted in the bodywork of the vehicle, but incorporates a beam deflecting system, in order that the direction of the beam may nonetheless be adjusted. In one form, the beam deflecting system comprises two Fresnel lenses, mounted face to face in a position to intercept the whole of the headlamp beam, one being equivalent to a diverging lens with cylindrical surfaces, and one being equivalent to a converging lens with cylindrical surfaces. In a neutral position, the effects of the two lenses cancel out, so that no deflection of the beam occurs. One of the lenses is movable in translation away from the neutral position, so that a deflection of the beam occurs, without any other change in the beam pattern. In modified embodiments, the stationary Fresnel lens is not used; instead, its effect is produced by using a reflector of modified shape.

Abstract: A luminaire apparatus includes a housing having a source of radiant energy mounted therein, a rotatable light transmitting member supported at one side of the housing and reflector means. The reflector means consists of a stationary reflector body and expansible reflector means for controlling the configuration of radiation energy projected through the light transmitting member located between the stationary reflector body and the light transmitting member. In one desirable form the stationary reflector body is provided with a specular surface which projects reflected light in a spot configuration while the expansible reflector means is provided with light diffusing surfaces which are operable to progressively modify the spot configuration to provide a flood configuration.

Abstract: A stage light comprising a reflector, an incandescent source, a variable iris and an objective lens system, the position of the lamp and the iris opening being variable individually or in ganged fashion.

Abstract: Apparatus for controlling reflected radiant energy to progressively vary distribution of the reflected radiant energy between spot and flood configurations comprises a housing body having a reflector surface, a lamp mounted in the housing body at the focal point of the reflector surface, and a dual light transmitting unit supported at an outer side of the housing body. The dual light transmitting unit includes a light transmitting disk component of circular shape fixed in abutting relation to the housing body, and a light transmitting disk cover component mounted for rotative movement about the central axis of the housing body and against the light transmitting disk.The light transmitting disk component is of generally circular shape and has an inner portion removed to form a substantially semi-circular opening.

Abstract: An automatic gel changer for remote operation, including a rotary solenoid associated with each gel frame to rotate such frames in and out of the path of the beam of light from the spotlight. Also associated with each gel frame is a damper for causing the motion of the gel frames as provided by the solenoids to be smooth and continuous.

Abstract: This invention concerns an attachment in and for a signalling lantern in which there are provided coaxial substantially transparent tubular bodies having mutual guide means so as to be movable along their common axis, said tubular bodies being held in support-cum-guide means adapted to be mounted on face (reflector side) of the lamp and rotary means to advance on rotation thereof (said rotary means) in one direction of one or the first tubular body to envelope the light source, such rotation causing retraction of the second tubular body if it already enveloped the light source and uncovering of the latter, while rotation of the rotary means in the other direction causing said first tubular body to retract and uncover the light source and the second tubular body to advance and cover the said light source, each said tubular body or at least that portion of each as will cover the light source being of different color.

Abstract: A spotlight includes a housing with an illumination source moveably mounted therein and a lens assembly moveably mounted therein. One or more lenses are mounted in the lens assembly, each in one of a plurality of predetermined positions. Independent movement of the source and lenses conveniently provides a variety of field angles, light outputs, or other illumination characteristics. A reflector, framing shutters, iris, pattern grids, and color filter gels may also be used as desired.

Abstract: The cross section of a beam of light may be controlled by three spacedly superimposed circular plates formed with respective, central apertures circular about the axis of the passage defined by the aligned apertures. The central plate defines with the two outer plates respective gaps in each of which two slides may be moved toward each other into a position in which they jointly block the passage, the paths of the two pairs of slides being perpendicular to each other. Springs hold the stack of plates and slides together so that the slides are guided by the plates bounding the corresponding gap, but thermal expansion of the elements of the stack does not interfere with the mobility of the slides which may be adjusted manually.

Abstract: A photographic flash device comprising a first mechanism for varying the angle of divergence of a flashed light and a second mechanism for varying the direction of the flashed light. The first variable mechanism is provided with a first body having a light source, a second body, a first slidable molding which has an optical panel to cover the front of the light source, a second slidable molding which surrounds the first slidable molding, and detent means which control slide movement of the first slidable molding and connects the first slidable molding with the first body. The second variable mechanism changes the direction of the flashed light from the light source by rotatably connecting the moldings to an additional body.

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: In a light-generating electronic flashlight which has a reflector and first and second discs which may be selectively placed ahead of the reflector for normal and wide-angled illumination of an object to be photographed, respectively, the improvement includes third and fourth discs which may be placed ahead of the reflector. Each of the third and fourth discs have parallel prismatic elements for unilateral deflection of the light generated by the flashlight for the third and fourth discs to displace the flashlight-generated light upwardly and laterally, when the third and fourth discs are placed ahead of the reflector, respectively, and upon the flashlight being in an upright position and directed towards the object to be photographed.

Abstract: An amusement device providing a variety of lighting effects in which a housing is provided with a source of light positioned below two transparent turntables mounted for rotation, a mechanism for rotating the turntables, an independently operated mechanism for varying both the direction and speed of rotation of one of the turntables relative to the other, and a plurality of discs provided with a variety of cut-out patterns to be positioned on top of the turntables.