Abstract: From a quasi point source, light distribution means produce a selected one or ones of broadly distributed ambient light, non-shadowing task illumination, multi-beam display lighting, projective lineal lighting and projective surface washing illumination lineally or radially distributed. Collimation optics shape light from a quasi point source into a disc of selected axial thickness. Containment optics contain divergence of and direct light from the collimation optics to distribution optics. The distribution optics modulates and redirects the radiant energy into a shape or shapes useful in illuminating architectural space. The distribution optics may reflect or refract light to direct and shape it for a particular architectural illumination requirement. The efficient combination of the optics provides for a system of minimized thickness, permitting maximum flexibility in integration with or within shelves, soffits and other structural members.

Abstract: A beam from a laser is light which is much more efficiently produced and which much more efficiently projects over distance than light from an incandescent source. However, because of its concentrated nature laser light has generally been of no use in viewing objects. A laser indicator which uniformly disperses a laser beam so that it may be used to view objects and particulates in the air comprises: a laser generator for generating a parallel beam; a first lens positioned in front of the laser generator having a rounded curvature, so that as the beam of light projects through the lens, the parallel beam of light is uniformly diverged; and, a housing maintaining the laser generator and the first lens in alignment. For some applications the above laser indicator further provides for a power switch and a power source being a battery. The housing carries the power switch and further comprises a cavity to house the battery.

Abstract: A UV curing lamp assembly permits adjustable positioning of a UV curing lamp with respect to a bracket supporting a reflector. The assembly includes an elongate UV lamp having opposed ends. A reflector having a central base and a curved reflective wall includes a pair of opposed openings through the reflector wall for passage of the UV lamp therethough. A bracket adjustably supports the reflector and the lamp. The bracket includes a bracket body movably supporting a mounting member for adjustably supporting the reflector with respect to the bracket body. A support arm extends from the bracket body towards one of the openings in the reflector. The support arm adjustably supports one of the ends of the UV lamp with respect to the reflector.

Abstract: The invention proposes a headlamp comprising a light source, a reflector of the elliptical type, and a converging lens, of the type in which a first mask is mounted for pivoting about a substantially transverse axis and includes a cut-off edge which, in the shading position, delimits a cut-off profile of the light beam given off by the source with a view to carrying out a first lighting function, a second mask being mounted for pivoting about a substantially transverse axis, and each of the two masks being able to be controlled and used independently in such a way that, depending on their relative position, at least three distinct lighting functions are carried out. According to the invention, each mask is in the shape of a plate, more particularly a rectangular plate, including two substantially transverse and horizontal edges, and the pivot axis of each mask is along one of its transverse edges.

Abstract: An adjustable light fixture includes a housing, a reflector assembly, and an adjustment mechanism. The housing has an external surface and an interior compartment. The reflector assembly is positioned within the interior compartment of the housing. The adjustment mechanism is adjustable from the external surface of the housing to cause movement of the reflector relative to the housing.

Abstract: A lighting assembly (10) is designed to control glare or spill light from an arc discharge lamp (12). A reflector insert (40) is formed from an identical reflector housing (14) and cut into an arcuate shape. An outer perimeter (42) is secured to the reflector housing and an inner perimeter (44) is adjustably secured to the reflector for subsequent manipulation or adjustment. The reflector insert advantageously has the contour of the primary reflector.

Abstract: A lighting system for stage, theatrical and architectural lighting, comprising a frame for supporting a plurality of light emitting diodes. The diodes are mounted to the frame so that each diode is both secured to the frame and also simultaneously positioned wherein each discrete diode light beam is directed to a prescribed remote focal point (target zone) and thereupon directed to a predetermined illumination area. Electrical power for transmitting and controlling electrical voltage to light emitting diodes by electrical circuitry integral with the frame. The frame can be configured as any hollow volume such a cone, a semi-ellipse, and a semi-sphere or can be configured as planar. Flexible blanks having apertures and pads for electrical connections can be used to construct rigid frames. An imaging gate a collimating lens and a focusing lens can be interposed between the frame and the illumination area.

Abstract: The present invention relates to a aiming apparatus to be interposed between a reflector and a housing to adjust direction of light reflected by the reflector; the aiming apparatus comprising an adjusting screw rotatably engaged at one end with the housing at a predetermined position; a pivot nut having at one end a nut portion capable of achieving thread engagement with the other end of the adjusting screw and at the other end a pivot portion, respectively; a pivot holder attached to a rear side of the reflector; and a nut receiver fixed on the front side of the housing at a predetermined position.

Abstract: A head light system for a vehicle using a discharge lamp together with glare stop structure provides a low beam mode and a high beam mode. The head light system includes a discharge lamp (4) mounted on a base plate (1), a shade (7) for selectively and partially shading light source (5) of the discharge lamp (4), and a moving means (K) for sliding said shade (7) relative to the discharge lamp (4) along an arrow (X) in a longitudinal direction of the discharge lamp (4). The shade (7) has a leg (7b) which penetrates the base plate (1), and the leg (7b) is coupled with an iron piece (9) in a solenoid (8) which is fixed to a rod (6) fixed under the base plate (1). The iron piece (9) is urged by a spring (10) so that shade plane (7a) of the shade (7) partially covers the light source (5) of the discharge lamp (4) when the solenoid is not energized so that low beam mode is provided.

Abstract: A zoom strobe device is provided with a light emitting unit, which includes a light source and a reflector and a light collecting lens that collects the light emitted by the light emitting unit. The light emitting unit and the light collecting lens are movable relative to each other in a direction of an optical axis of the light collecting lens. The light collecting lens is configured such that a light emitting unit side surface has a positive power, and a surface opposite to the light emitting unit side surface (i.e., the object side surface) has a negative power. The light collecting lens has a positive power as a whole.

Abstract: Illumination angle adjuster (42) for condensing illumination light from a light generator (41) toward a workpiece (25) includes a simple-structured optical member of condenser lens (44). With the simple arrangement, illumination angle of the illumination light to the workpiece (25) can be easily changed by moving the condenser lens (44) along an optical axis of an optical system (37).

Abstract: A light source apparatus comprises a light source and a collimating lens for adjusting a luminous flux from the light source. The light source is supported by a holder made of a steel plate, a supporting member made of a steel plate is supported by the holder so as to slide in a direction of an optical axis to the collimating lens, and the collimating lens is supported by the supporting member.

Abstract: A spotlight has a curved reflector (1, 1′) and a lamp (2, 2′) arranged inside a cavity formed by the reflector (1, 1′). The lamp (2, 2′) and the reflector (1, 1′) are movable relative to one another in a direction of a main optical axis of the spotlight. A converging lens (5) is arranged in front of the reflector (1, 1′) in a direction of light emission. A dispersive lens (6) is arranged between the reflector (1, 1′) and the converging lens (5).

Abstract: The present invention is an illumination case used for decoration or advertisement. It includes a case-body, a front cover, an inner frame, a light source, a transparent back plate, an illumination filmstrip, a grating plate, and two step motors with a transmission that drives the grating plate to move. The transparent back plate is fixed onto the inner frame. The illumination filmstrip overlays the transparent back plate and is fixed against it. The two step motors mentioned above are installed on the inner frame behind the upper part or lower part of the transparent back plate, one on the left side, and the other on the right side. The above-mentioned grating plate is fitted with a hanging bar on both the upper side and bottom side respectively, which makes the grating plate spread out neatly. One hanging bar is linked with the transmission of the two above-mentioned step motors through a set of corresponding levers installed on the inner frame.

Abstract: A vehicle light can include a single light source and be capable of switching between low-beam mode and high-beam mode by moving a movable portion. The vehicle light can also include a first reflecting surface, a projection lens, and a shutter selectively insertable in the luminous flux from the first reflecting surface to the projection lens. The vehicle light can further include a second reflecting surface having a first focus and a second focus, a third reflecting surface having a first focus and second focus, a fourth reflecting surface having a focus approximately on the second focus of the second reflecting surface, wherein when the third reflecting surface is located in its inserted position relative to luminous flux between the second reflecting surface and the fourth reflecting surface, the first focus of the third reflecting surface is substantially on the second focus of the second reflecting surface. The movable portion can include the shutter and the third reflecting surface.

Abstract: A headlight for a vehicle for producing a low beam and at least one light beam with a greater distance, the headlight comprising a light source, a reflector, the light source and the reflector together forming a headlight unit, an electrically adjusting device for changing a relative position between the light source and the reflector, a light width adjusting device for turning the headlight insert about an at least approximately horizontally extending axis, and a safety device operative for monitoring at least indirectly an operation of the adjusting device and in the case of an error when the adjusting device operates not in an orderly manner, the safety device reduces an electric power with which the light source is operated and/or reduces a distance of a light beam produced by the headlight unit.

Abstract: A bollard style light fixture, which allows the user to vary the fixture's light distribution pattern, while also eliminating the fixture's emission of glare. The fixture of this invention is also designed to absorb a minor amount of shock without damage, and provides a mechanism whereby the fixture may be quickly and easily leveled and releveled even after installation. The fixture of this invention comprises a base; a compressible base pad upon which the base rests; a support sleeve vertically extending from the base; a light source located within the support sleeve; a light-emitting window located on the support sleeve opposite the base; and an adjustable cap assembly located atop the light-emitting window vertically adjustable for variably covering the light-emitting window, thus varying the light distribution pattern of the fixture and redirecting the light rays towards the ground, eliminating glare.

Abstract: A vehicular headlamp in which a light source and an actuator are connected to a power source using the minimum number of parts, lamp body waterproofing and dustproofing are assured, and each connector is firmly secured to the lamp body of the headlamp. The headlamp includes the actuator for operating a light distribution changing device that changes the distribution of light emitted from the light source. A hookup connector which is provided with a connection portion connected to a power side connector provided on a power cord connected to a vehicle power source at one end thereof and a connection portion connected to the light source side connector and the actuator side connector at the other end thereof is mounted in a hole formed in the lamp body. The hookup connector has a flange which covers the periphery of the opening.

Abstract: An apparatus and method for semi-automatic focusing and assembling of a light beam modifier, such as a lens, relative to a light beam source to optimize the light beam characteristics at one or more locations along the beam path using one or more light beam analyzers (27, 28, 29). A host computer compares the measurements and axially adjusts the light beam modifier. The apparatus may include two focusing stations (21, 22) for alternately focusing and assembling two light source assemblies, two beam splitters (25, 26) for splitting the light beam emitted from either focusing station into three components, and three light beam analyzers for measuring the beam characteristics at three locations. The apparatus may also include a video camera for automated or manual pointing of the laser beam, a semi-automatic glue dispensing system for fixing the light beam modifier relative to the light source and an automatic laser power-up circuit.

Abstract: An enlarged surface LED lighting device having an interior reflector disposed and configured to reflect the light emitted by a LED element to increase the divergence of the light and form an interior reflected light. The interior reflector is typically a surface of revolution about the pattern axis configured to reflect and bend the light away from the axis of the spatial radiation pattern of the emitted light. The interior reflector is also formed to Increase the transfer of heat away from the LED element. The interior reflector is usually disposed in close proximity to the LED element to maximize the percentage of emitted light it redirects. The lighting device additionally includes an exterior reflector also normally a surface of revolution about the pattern axis.

Abstract: A vehicle headlight has a cam mechanism for displacing the reflector and the light source of the headlight with respect to each other, between two relative positions in which the headlight emits two different types of light beam. The cam mechanism comprises a first cam member and a second cam member, and it converts rotation of the first cam member about an axis of rotation into a first straight line motion of the second cam member. The first straight line motion is collinear with the axis of rotation.

Abstract: A light fixture includes a housing, a lens, a lens frame, and at least one mounting spring. The mounting spring is mountable to the lens frame and includes a first member configured to retain the lens in the lens frame and a second member configured to attach the lens frame to the housing.

Abstract: A method for furnishing a perceptor with apparently continuous illumination over an extended target area, in which at any instant only part of said area is illuminated, but every part thereof is intermittently and repeatedly illuminated by discontinuous flashes. With regard to any one part of said target area, the flashes are repeated at time intervals not less than the decay period of the response elicited in the perceptor. The method is performed by means of a device which comprises a beam-generating arrangement (1) that focuses a beam of radiation (5) upon a rotatably-mounted light-deflector (6), which is rotated under control at a suitably high speed by mechanical means (9, 10, 11 and 12) so as repeatedly to illuminate a target area (15) with a narrow flash to radiation (16).

Abstract: A projecting lamp for projecting images to create visual and decorative effect is provided. The projecting lamp mainly includes a lamp cylinder mounted on a supporting structure. A projecting structure is mounted in a front opening of the lamp cylinder and includes a focus control bar. By rotating a threaded body of the focus control bar, a distance between a projecting lens located at a front of the projecting structure and a projecting picture located at a rear of the projecting structure is finely adjusted to enable projection of a magnified and clear image. The lamp cylinder is adjustable in its elevation angle and its angular position in a plane. The whole projecting lamp may be quickly disassembled for easy storage and conveyance.

Abstract: An apparatus consisting of a cable grid system for lighting in which a light can be positioned at any location on a ceiling. Optionally, the light fixtures can include a diffraction grating reflector (such as a music CD) to reflect light patterns onto the ceiling from a light source which is preferably a point source. Also, light fixtures with diffraction grating reflectors could be mounted on a wall, table, or on the ceiling without using a cable grid system.

Abstract: A light projector, particularly for projecting light with variable dimensions and coloring, comprising, on a light beam emitted by a light source, a color changing unit, the light projector further comprising a zoom device being constituted by a first antihalation or Fresnel lens which can move with respect to a second fixed lens, the first and second lenses being arranged downstream of the color changing unit.

Abstract: A light fixture having an adjustable reflector is supported on a deployment bar. An actuation screw passes through the deployment bar and engages a threaded stud. Threading the actuation screw into and out of the threaded stud bends the deployment bar, which in turn pushes against the reflector adjusting the angle of the reflector.

Abstract: A device for lighting arrangements for a ceiling, includes means providing a light beam above a ceiling, reflector means for intercepting and reflecting light beams and located above the ceiling, means for mounting the reflector means for movement around two orthogonal axes and located above the ceiling, and remote movement means located above the ceiling for moving the reflector means selectively about the two orthogonal axes from a remote location to reflect the light beam to a location below the ceiling. The remote movement means has a control handle located below the ceiling. An arrangement can be provided so that there are a plurality of reflector means aligned to receive the light beam, and all but the last reflector means is a beam splitter.

Abstract: The present invention comprises a discharge lamp (2) for emitting light; a cold mirror (4), having an opening portion, for reflecting the light emitted from the discharge lamp; a reflecting mirror (10), located on the opening portion side of the cold mirror, for reflecting the light reflected by the cold mirror; a light-shielding drum (6) having a light emission port (8) for emitting the light reflected by the reflecting mirror; a stepping motor 14 for driving the reflecting mirror and the light-shielding drum to rotate about an optical axis of the discharge lamp; rotational angle detecting means (18, 20) for detecting a rotational angle of the reflecting mirror and the light-shielding drum; and control means (40, 46) for controlling, according to the rotational angle detected by the rotational angle detecting means, the rotational driving of the reflecting mirror and the light-shielding drum (6) caused by the stepping motor 14; wherein any of a plurality of irradiation ports is selectively irradiated through

Abstract: A picture light comprising a fitting (12,13) for mounting the light on a wall or picture. An arm (9) pivotally attached by pivot (10) at one end to the fitting (11) and at its other end by pivot (8) to hood or shade (1) in which at least one bulb (30) is housed. Adjustable light directing means are mounted in the hood (1) in the form of a pair of spaced vertical plates (40,44) movable axially of the hood (1) on rotation of knobs (5,6) and a pair of horizontal plates (50,50A) mounted on the vertical plates 40,44. Movement of the plates 40,44 axially along the hood (1) adjusts the depth of the pool of light (76) falling on the picture (75) whereas pivoting the horizontal plates (50,50A) adjusts the width of the pool of light (76).

Abstract: A diffusing dimmer includes an arm formed of non-transparent material and having a first end and a second end. The first end includes a mounting attachment. An extension portion of light diffusing material is connected to the second end and extends outwardly from the second end to a terminal edge formed in the light diffusing material. A pair of diffusing dimmer arms may be mounted in a light fixture movable toward each other in overlapping relationship to gradually diffuse and eventually block a light beam which projects lighting effects from the fixture. Also, rapid movement of the arms provides a strobing effect.

Abstract: A lamp having a threaded base for threadedly coupling to an electrical energy source is provided. The lamp includes a light-generating bulb replaceably coupled to the threaded base and a housing coupled to the base. The housing has an inner light-directing surface disposed about the bulb. The housing terminates at an outer rim, and defines an opening. A mounting assembly, including a lens-holding ring with a keeper and a latch hook on the sidewall, removably mounts a lens on the rim in a covering position closing the opening, whereby removal of the lens permits access to the bulb. The lens holding ring may be separable from the housing or may be pivotally coupled to a ring on the housing.

Abstract: An illumination obscurement device for controlling the obscurement of illumination from a light source which is optimized for use with a rectangular, arrayed, selective reflection device. In a preferred embodiment, a rotatable shutter with three positions is placed between a light source and a DMD. The first position of the shutter is a mask, preferably an out of focus circle. This out of focus circle creates a circular mask and changes any unwanted dim reflection to a circular shape. The second position of the shutter is completely open, allowing substantially all the light to pass. The third position of the shutter is completely closed, blocking substantially all the light from passing. By controlling the penumbra illumination surrounding the desired illumination, DMDs can be used in illumination devices without creating undesirable rectangular penumbras.

Abstract: An array of disks facing a viewing direction is composed of disks rotatable about an axis approximately perpendicular to the viewing direction between alternating orientations where light and dark surfaces are respectively displayed in the viewing direction. There is provided a row of LEDs located forwardly of the array and out of the normal viewing path located to illuminate the disks of said array. Masking means prevents direct illumination from said LED's being visible in the viewing direction. In a further variant the disks' light surfaces contain a fluorescent component and the LEDs are selected to provide radiation including UV spectra.

Abstract: To permit change of direction of light emitted from a reflector lamp (3) adapted to be secured in a fixed socket, a reflector unit, preferably in the form of an attachment, is provided which is formed by a frame (2) which pivotably retains a partially light transparent and partially light reflecting disk (1). The frame (2) is coupled by a snap connection with a circumferential rim (3a) of the reflector lamp, so that the disk (1) is rotatable about the reflector axis (A) as well as pivotable in the arms (2). The reflector axis (A) and the pivot axis (P) of the disk preferably are perpendicular to each other. The disk may have a mirror reflective, and one matte surface, and can be made of plastic, aluminum, sheet steel and, if so, formed with openings (1a) therethrough; if made of glass, the surface can be partially light reflective/transmissive.

Abstract: The focus angle of a search light mounted on a helicopter or other platform is narrowed or widened by rotating a bidirectional focus control cam in a clockwise or counterclockwise direction as selected by a manually operated three-position control switch which determines the rotational direction of a DC motor driving the bidirectional focus control cam. The DC motor has first and second terminals which are selectively connected to either a DC power source or ground by a double-pole, single throw dual relay which reverses the polarity and thus the direction of rotation of the DC motor. The dual relay is connected by the same single wire interface currently in use to the manually operated control switch, which manually operated control switch is within a control box located in the helicopter.

Abstract: A headlamp 1 has a beam distribution switch mechanism that comprises a hood 3 and a reflecting mirror 4. The hood 3 includes a fixed member 31 having a cut portion 31a on the upper side and a moving member 32 for opening and closing the cut portion. The reflecting mirror 4 includes a first reflecting surface 41 for reflecting the light beam from the light source 2 when the cut portion 31a is closed and the second reflecting surface 42 for reflecting the light beam from the light source 2 when the cut portion 31a is opened.

Abstract: A projector headlamp utilizing only a single HID bulb for projecting light in a forward direction generally along a horizontal axis selectably between low beam and high beam conditions while shifting the hot spot as required between these conditions.

Abstract: A light beam source includes a laser diode having a housing. The housing has a base and a cap with an opening for emitting laser light. A lens mount having a generally tubular shape and being formed from a unitary piece of material is provided. The lens mount has a first end and a second end, the second end including inner walls. A lens is disposed at least partially within the first end of the lens mount, the lens being disposed so as to receive and focus the laser light as a beam. The cap of the laser diode is disposed at least partially within the second end of the lens mount and frictionally engages the inner walls. The inner walls include at least one longitudinal slot that allows the inner walls to expand and frictionally engage the cap when the cap is disposed in the second end of the lens mount.

Abstract: In a light distribution lens for a strobe provided in front of a strobe light emitter to gather strobe light, one of opposed lens surfaces is made of a convex surface, and the other lens surface is made of a convex Fresnel surface. A zoom strobe device is also disclosed, which includes a light emitter unit having a light emitter and a reflector, a light distribution lens provided in front of the light emitter unit to gather light emitted from the light emitter, and a zoom device for varying the distance between the light emitter unit and the light distribution lens.

Abstract: Disclosed herein is a trouble light comprising a handle including a light bulb socket adapted to receive an electric light bulb, a cage mounted on the handle and adapted to enclose the light bulb, and a reflector located within the cage. The reflector is mounted on the handle so as to allow for the rotary movement of the reflector relative to the handle.

Abstract: A light beam projector device having a light source and a reflector arranged to direct the light originating from the light source in such a manner as to form a light beam, said reflector having a curved concave reflecting surface with a geometrical focus where the light source is positioned, at least a first tubular wall made of a material able to filter color from the light and arranged when set in an active position to laterally embrace the light source so as to be traversed by the light before it reaches the reflector, the tubular wall being arranged with its axis substantially coinciding with the axis of the reflector, actuator means for axially moving the tubular wall into an active position or to an inactive position below the reflector where it does not interfere with the radiation emitted by the light source and directed towards the reflector, and to intermediate positions in which only a part of the tubular wall is traversed by the light, and a second tubular wall or tubular wall segment positioned

Abstract: A lighting fixture or luminaire in which a multi-tube fluorescent lamp may be oriented in a horizontal position while focusing the omnidirectional output from the lamp. A swivel assembly enables the lamp to move as a single unit with the reflector housing, thereby to maintain the alignment of the lamp tube to the reflector surface while allowing aiming of the light beam. In one embodiment of the invention, a socket housing snap fits into the reflector housing so that the lamp rotates simultaneously with the reflector housing. The beam spread delivered by the luminaire has a bright center and a soft perimeter so that the bright center may be used as accent lighting and the peripheral light may be used for soft general lighting.

Abstract: A mounting assembly for mounting a light pipe lighting system on a support surface includes an elongate support rail connect to the light source and a hanger bracket connect to the elongate support rail. The support rail includes oppositely extending longitudinal flange portions which slidably engage the hanger bracket and thereby serve to connect the support rail with the hanger bracket. The hanger bracket can be either slidably supported on the support rail to allow the light source to move relative to the support surface or the hanger bracket can be fixed at various locations along the support rail. The elongate light source support rail is connect to the light source with a bracket or with a casing which encloses the light source, and the light source support rail can be further connected with an associated light pipe support rail to transmit axial forces between the light pipe and light source.

Abstract: An optical waveguide structure (1000) is configured to receive light from a light source (1020) and distribute the light to output ports. The structure includes a central portion having top and bottom surfaces, peripheral edges and an opening (1070) for receiving the light source (1020). A first waveguide (1010) extends above the top surface of the central portion. The first waveguide (1010) has an input face (1030) at an end nearest the opening (1070). The first waveguide (1010) extends from the opening (1070) toward a peripheral edge of the central portion.

Abstract: The headlight is used as a high beam headlight and has a light source (12) propagating light that is reflected by a reflector (10) as a light beam, which produces maximum illumination intensities that do not exceed legally prescribed maximum illumination intensities. The headlight light is designed so that the high maximum illumination intensities permissible in Europe according to the ECE Rules are produced by the light beam issuing from it. A screen device (20,30) is insertable in this headlight, by which a portion of the light issuing from the light source (12) to the reflector (10) is blocked and thus prevented from reaching the reflector. Because of that the maximum illumination intensities produced by the light beam issuing from the headlight are reduced so that the headlight can be used, for example in the USA or Japan, where reduced maximum illumination intensities are permitted in comparison to those in Europe, by insertion of the screen device in the otherwise unchanged headlight.

Abstract: A armored light fixture which comprises an armored housing which defines an upper passageway through which light may pass, at least one lamp disposed within the armored housing, at least one reflector structure which is adjustable in position and which is disposed above the armored housing to enable the adjustable reflection of light which passes through the upper passageway of the armored housing.

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 first backlight light source is energized either at full or reduced rated power, until such time as the brightness which can be produced has reduced by a predetermined amount (e.g. half of the original level). A second or backup source is then switched on while the first is temporarily switched off. When the backup light source has degraded to the point where the brightness which can be produced by this light source has reduced by a second predetermined amount (which is the same as the first predetermined amount, e.g. 50%) the first light source is switched back on so that both are simultaneously energized. When this measure fails to maintain the required level of brightness, the power with which the light sources are energized is increased.