Abstract: A lamp device includes a light emitting unit for emitting a light beam, a light filtering unit, first and second focusing lenses, and a total internal reflection unit. The light filtering unit has a glass-holding frame and a pair of flat glasses which are fixed opposedly to the glass-holding frame. A space is formed between the flat glasses. A damping fluid is received in the space, and a plurality of colored glass fragments are dispersed in the damping fluid. The light filtering unit is positioned adjacent the light emitting unit so that the light beam from the light emitting unit can pass through the flat glasses and the colored glass fragments. The first and second focusing lenses are spaced opposedly from one another. The first focusing lens is positioned adjacent the light filtering unit.

Abstract: A liquid cell articulated artistic display system designed for introducing the natural phenomena of light refraction into manmade environments in a controlled manner, the display system including a light transmissive container partially filled with two or more immiscible liquids having a difference in specific gravity between 0.1 and 0.02. The container is slowly oscillated so that each of the liquids create a continuous series of distinctive wave sets mutually interacting with one another to create a clearly delineated wave phenomenon. A light beam is directed through the oscillating container and is refracted by the opposing wave sets causing the interactive wave phenomenon, thereby projecting a captivating, constantly changing wave pattern onto a visible surface.

Abstract: An indicator device (14) having no moving parts includes a layered assembly (26) visible through an aperture (28) in a wall member (30), and a light source (30) positioned behind the layered assembly (26). The layered assembly (26) comprises a first transparent sheet (32) of a first color, a second transparent sheet (34) of a second color, and an LCD panel (36) interposed between the two sheets (32,34). The LCD panel (36) is adapted to be rendered transparent when energized and to be rendered opaque when de-energized. When the LCD panel (36) and the light source (38) are de-energized, the first color (e.g. red) is seen through the aperture (28), and when the LCD panel (36) and the light source (38) are energized a third color (e.g. green) is seen through the aperture (28). The indicator device (14) may be used, for example, as an in-service indicator of an ATM.

Abstract: The headlamp has a reflector (10) and a light source (12). Disposed in the ray path of the light reflected from the reflector (10) there is a lens (18), which is received in a mounting (20) and consists of an elastically deformable material. The lens (18) is acted upon by at least one control element (22), by which a force can be applied to the lens (18) in order to deform it. The light passing through the lens (18) is influenced, i.e. deflected in its direction. In the nondeformed state of the lens (18) the light beam radiating from the headlamp exhibits a first characteristic, i.e. direction and scatter, and in the deformed state of the lens (18) the light beam radiating from the headlamp, because of the then different optical effect of the lens (18), exhibits a different, second characteristic.

Abstract: An apparatus for illuminating rotating wheels on vehicles includes a stepper motor mounted on the rotating wheel, a counterweight mounted on the shaft of the stepper motor, and a plastic tube mounted on the wheel for rotation therewith containing a plurality of light emitting diodes interconnected with a wire attached to the stepper motor. Rotation of the wheel causes the stepper motor body to turn relative to the counterweighted shaft thereby producing electrical pulses sufficient to illuminate the light emitting diodes.

Abstract: A fluid optical system for focusing all entering light whatever its direction and incidence, and having an entrance surface through which the light enters. The optical system has a volume having an optical shape generated by a logarithmic spiral so that the focusing occurs for light beams entering the entrance surface from any direction through any point of the entrance surface. There flows in the optical shape a fluid which is maintained in forced circulation to form a fluid optical system, and which is forced to enter the optical system tangentially to the optical shape and adjacent to the entrance surface which is arranged so that initial circulation is tangential and laminar. Inside the optical system, the fluid has a centripetal rotation movement until it exits through a cone end of the optical shape, thus draining off calories.

Abstract: The lamp assembly including a reflector having two or more reflective surfaces, a light source and an electrochromic means positioned between the light source and at least one reflective surface. Each reflective surface directs light in a different direction. The electrochromic means is capable of blocking light from exiting the lamp assembly from at least one direction.

Abstract: A colored light pattern generator including a pair of transparent plates maintained in spaced relationship in a sealed container for defining a fluid-filled cavity. The container includes a receiver and a twist-on-and-off cap ring. The fluid produces random, floating colored images in response to a beam of light being passed through the plates.

Abstract: Variably shaped lenses that adjust the shape of the light beam of vehicle headlights. The shape of the lenses is changed by the transfer of a liquid between the lens assembly and an external cylinder. Baffles are used in the refracting portion of the lens to prevent shifting of the liquid and distortion of the lens when the vehicle accelerates.

Abstract: A fluid-filled, colored light pattern generator including a pair of transparent plates maintained in spaced relationship by a spacer ring. The ring includes an orifice for admitting fluid into a sealed cavity formed by the plates and the ring. Colored image producing members are suspended for random floatation in the fluid so that when a beam of light is passed through the plates, moving colored images are projected.

Abstract: A flexible, light-transmissive, factory sealed, tubular display package having multiple channels which may rotate around or fluctuate parallel to the longitudinal axis of the package is disclosed. The channels may have coextruded linings and contain light-producing, luminescent materials, chemiluminescent materials, bioluminescent materials, fluorescent materials, colored dyes, liquid crystal materials, and the like to provide a multi-colored display of the liquid products contained therein. When used with chemiluminescent compounds, the package finds particular application as jewelry, lightsticks, and in advertising exhibits.

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 headlamp for a power vehicle comprises a reflector having an apex, a light source arranged in the apex of the reflector, and a dimming device which is formed so that in a position for high beam it allows light from the light source to reach a lower reflector region or allows the light to exit the same, and in a position for low beam it keeps away light from said light source from the lower reflector region or blocks light reflected from the lower reflector region. The light source is formed as a gas discharge lamp with an axial light arc, an upper reflector region is formed for producing a light distribution for low beam while the lower reflector region is formed for producing a light distribution for high beam.

Abstract: A headlight for a motor vehicle comprises a gas discharge lamp as a light source emitting visible light and light in UV-wavelength region, a reflector having a first region which reflects the light for forming a low beam and a second region which reflects an additional light beam illuminating a region located beyond a region illuminated by the high beam, a filter arranged in a path of the additional light beam and at least partially absorbing the visible light and at least partially permeable for light in UV-wavelength region. The filter is formed by a coating which covers the second reflector region and is composed of a filtering material.

Abstract: A head lamp device for automobiles has a light source and a cover member arranged in front of the light source. The light source is comprised of a transparent hard resin plate curved outwardly at its central part, and a transparent soft resin sheet intimately in contact with a rear surface of the transparent hard resin plate with a peripheral edge of the transparent soft resin sheet attached fluid tight to a peripheral edge of the transparent hard resin plate. The transparent hard resin plate has a pipe through which a colored solution is supplied into and removed from a space formed between the transparent hard resin plate and the transparent soft resin sheet.

Abstract: A flexible light guide consists essentially of a flexible tube made of an amorphous fluoropolymer based on a combination of terafluoroethylene and a fluorinated cyclical ether, and a transparent liquid filling the tube. The liquid has an index of refraction which is higher than that of the material of the tube. The light guide may be provided with means for continously passing the liquid through the tube. In this case, the liquid may be physiological sodium chloride solution and the light guide may be a part of an endoscopic illumination device useful for endoscopic coagulation.

Abstract: A flashlight including a handle for receiving a power supply and a light source releasably mounted to the handle for emitting light. An exterior transparent cup is coupled to the handle and a middle transparent cup is coupled to the handle. The second transparent cup is positioned intermediate the first transparent cup and the light source. The exterior transparent cup and the middle transparent cup define a outer chamber therebetween for receiving colored fluid therein. An interior transparent cup is coupled to the handle and positioned between the middle transparent cup and the light source. The middle transparent cup and exterior transparent cup define an inner chamber for receiving colored fluid. Accordingly, the light emitted from the light source passes through the colored fluids and colored light is emitted from the exterior transparent cup.

Abstract: With the aim of mitigating a decrease in flux of light and improving the light utilization efficiency, an optical conductor used in a liquid crystal lighting apparatus is constructed of a plurality of refractive layers N.sub.1, N.sub.2, . . . , N.sub.i of different refractive indices which are gradually lowered from light incident end surfaces to a center portion of the optical conductor. Light coming from the light incident end surfaces is refracted at interfaces of the refractive layers N.sub.1, N.sub.2, . . . , N.sub.i so as to reach a light outgoing surface at an incident angle .theta..sub.i which is smaller than a critical angle .theta..sub.w, thereby preventing all the beams from undergoing total reflection at the light outgoing surface and shortening the optical length in the optical conductor.

Abstract: To correct variation of a property of light orientation induced by inclination of a vehicle body during a cornering operation, a projector type cornering head lamp including an inclination sensor further includes correcting means. When the correcting means is mechanically constructed, it comprises a pair of opening portions formed on a light shielding plate, shutters for closing the opening portions therewith and solenoids for pulling the shutter downwardly in response to an output from the inclination sensor. When the correcting means is electrically constructed, it is constituted by a circular liquid crystal element preferably comprising a supertwistnematic liquid crystal and serving also as a light shielding plate.

Abstract: In a cooling liquid recirculation system, walls of transparent jacket tubes for cooling a mercury-vapor lamp, which jacket tubes are provided separately from the mercury-vapor in accordance with the prior art are formed in optical filters to thereby decrease the temperature of an object to be illuminated. A recirculation unit of cooling liquid for recirculation of the jacket tubes is connected through an elastic duct to a light source unit such as a mercury-vapor lamp. These components are movable for practical use.

Abstract: A safety light for a swimming pool that can be installed without draining the pool. The safety light has a lamp and casing assembly supported by an elongated bracket. The bracket is attached proximate its upper end to a sidewall of the swimming pool above the water line and the lamp and casing assembly is supported by the elongated bracket proximate its lower end. The bracket can be a tube which is capped at its lower end, filled with water and colored with a dye for the purpose of filtering the light to minimize the safety light's attraction for bugs.

Abstract: An optical system for endoscopes comprising a light source and a condenser optical system for focusing the light emitted from said light source, and adapted so as to lead the light emitted from said light source to be incident through said condenser optical system onto light guides having different NA's, said condenser optical system being equipped with a means capable of varying or adjusting NA of the light emerging from said condenser optical system in conjunction with NA of a light guide selected for use. This optical system for endoscopes permits matching NA of the emerging light bundle with the NA of the selected light guide by using the adjusting means, thereby improving light distribution characteristic and transmission efficiency.

Abstract: An arc discharge headlamp system employs a single continuously operating arc discharge source to provide both high and low beam patterns. The continuously operating arc discharge increases lamp life and eliminates the problem in arc light source headlamp systems of momentary dimming when switching to high beam operation due to mercury condensing within source. The headlamp has an arc light source mounted horizontally within a reflector. Light from an arc light source is reflected by the reflector through a lens to form a low beam pattern. A mirror within the reflector is positioned to form a virtual image of the light source and which is directed towards a second lens concentric with the first lens to form a high beam pattern when combined with the low beam pattern. Switching between the high beam and low beam patterns is accomplished in a variety of ways.

Abstract: A method and apparatus for producing primary rainbows and secondary rainbows in a curtain of liquid droplets in the air, whereby the rainbows are produced by refractive dispersion within the droplets themselves, and whereby the rainbows are visible from directly opposite sides of the curtain of droplets. The curtain of liquid droplets is produced by a water fountain. The device of the invention comprises a source of radially distributed light and a source of liquid droplets. The light source can be an array of lights configured so that the light rays appear to emanate from a common center. The light source may also be a collimated light source such as a searchlight which reflects light off a mirror-like conical surface or a combination of such sources. The light source may also be a single light source in a covered curved reflector.

Abstract: A fluidized bed lamp which provides a pleasing visual and audible display. A bed of particles is contained within an outside tube and supported by a distribution plate. A liquid is pumped through the bed of particles, causing the bed to be in a state of fluidization. Fluidization is characterized by the bed behaving as a suspension with the particles moving about in a chaotic manner. The liquid is returned to the pump with a downcomer tube. The fluidized bed of particles is illuminated with a light fixture contained within the downcomer tube or by lights on the top or bottom of the lamp assembly.

Abstract: A cathode-ray tube socket comprising a terminal board including a plurality of radial grooves and a circular groove disposed at the middle portion of the radial grooves and cutting across the radial grooves, the circular groove having a plurality of projecting members and a cap cover for assembling with the terminal board and an electric ground terminal inserted into the terminal board and cap cover has a plurality of opening and spark arresting members so that, after assembly, the electric ground terminal is engaged in the circular groove for effectively protecting the overvoltage.

Abstract: In an illumination device comprising a light source and a light guide consisting of a flexible tube of fluoroplastic filled with liquid the filling liquid is a phenylmethyl silicone oil.

Abstract: The housing of this device contains an electric lamp and an electric motor, the drive shaft of which rotates a circular, light transmissive, polarized cell, which is removably mounted in the housing over a light transmissive plate, which is mounted in an opening in the housing to direct diffused light from the lamp onto one side of the cell. The cell has a chamber filled with a liquid, and a plurality of small, birefringent elements which float randomly in all directions as the cell rotates, and which disperse light from the lamp into a variety of constantly changing colors and hues that are visible from the side of the cell remote from the diffuser.

Abstract: A light radiator for diffusing and radiating light rays, transmitted through an optical cable or the like, outside of the optical conductor cable, includes a transparent cylinder, an optical conductor for guiding light rays into the cylinder, an optical means movably accommodated in the cylinder for reflecting and radiating the light rays, and a driving device for moving the optical means along the axial direction of the cylinder.

Abstract: A contoured concealment lens for vehicle headlights. The lens conforms to the contour of the vehicle body and includes an internal cavity that is selectively filled with an opaque fluid when the headlights are not in use. The concealment lens has no adverse influence on the aerodynamics of the vehicle when the lights are in use and it is aesthetically compatable with the vehicle at all times.

Abstract: An underwater lighting system for the illumination of decorative water displays and the like is disclosed. Each light in a typical lighting system is disposed below the surface of the water, with the light source having a flat lens to avoid the spreading of the rays due to the index of refraction of the water. Disposed over the light source with the upper surface thereof above the water surface and the lower surface thereof below the water surface is a light guide for allowing the passage of light therethrough substantially perpendicular to the upper and lower surfaces, though at the same time substantially inhibiting light from passing therethrough which is not substantially perpendicular to the surfaces of the light guide, at least with respect to one transverse axis thereof. In this manner, the normal diffusing of underwater lighting encountered in water display caused by ripples in the pool are avoided because of the upper surface of the light guide being above the water level.

Abstract: Devices are disclosed for displaying three-dimensional objects intended to be centripetally viewed, such as flower arrangements, and for individually and uniformly illuminating a plurality of grouped flowers and the like in penetrating fashion. The devices comprise a watertight upper cavity containing flowers in separated, side-by-side relationship and a lower cavity containing the light source. The cavities are separated by a transparent shelf, the light traveling upwardly into the vase-like upper cavity, between and around the stems of most of the flowers so as to illuminate the inner as well as outer reaches of the foliage of the flowers. The light source is positioned below and in close proximity to the flowers, thus reducing scattering of light, power consumption and glare.

Abstract: The disclosure herein describes a porthole assembly adapted to be mounted in registry with an opening in a swimming-pool wall; the assembly comprises a lamp unit holder ring mounted to the outer face of the wall and a transparent cover plate disposed on the inner face of the swimming pool wall. The elements which secure the holder ring and the cover plate to the wall have tool-engaging ends accessible from outside the pool; their opposite ends are received in a water-tight arrangement on the cover plate so as to avoid all contact with the water of the pool. The engagement of the lamp unit to the holder ring is such that the light emitted is directed towards the bottom of the pool. The porthole assembly may be mounted to the wall of an above-ground swimming-pool as well as to an in-ground swimming-pool.

Abstract: The degree of diffusion of a light source can be varied by surrounding the light source with a liquid crystal cell. The light source is positioned at the focal point of a reflector and the liquid crystal cell surrounds the light source. When the cell is unexcited, the light rays which emanate from the source are virtually unaffected as they pass through the cell striking the wall of the reflector. In this state the light rays are projected nearly straight out of the reflector, providing illumination for objects at great distances from the source. When the cell is excited, scattering occurs and the light rays are diffused as they are re-emitted from the liquid crystal. The diffusion shifts the apparent light source points away from the focal point. This diffusing effect causes the light which is projected from the reflector to illuminate a wide area in close proximity to the lamp.

Abstract: In an underwater pool or spa light assembly for retaining an annular lens gasket and light housing in position, comprises:(a) a face ring having a central axis and annular re-entrant wall defining an annular flared portion to seat the gasket assembly, the ring also having retainer structure to retain said light housing which is engageable with the gasket to annularly compress same axially,(b) and circularly spaced tabs on the ring and projecting generally axially beyond the edge of the annularly flared portion to peripherally position the gasket, blocking radially outward extrusion thereof when compressed by the housing.

Abstract: A night light assembly which plugs directly into an electrical wall outlet to provide low level illumination while at the same time generating an aromatic vapor whose odor is thematically related to a replaceable picture slide incorporated in the assembly and illuminated thereby. The assembly includes a shell supported by a plug projecting from its rear and insertable into the wall outlet. Housed in the shell is a low-wattage bulb, the shell being covered by a removable frame within which is nested the picture slide to be illuminated. Coated on the rear face of the slide is a translucent layer having a volatile aromatic liquid dispersed therein. The shell is vented, and as the air in the shell is heated and expanded by heat arising from the bulb, a convection current is produced which passes across the slide layer to volatilize the liquid, thereby creating an aromatic vapor which is discharged through the vent into the atmosphere.

Abstract: Cryogenic-fixation apparatus comprises a light source, a beam from which enter cooling liquid in a bath, through a window in the underside of the bath. The beam can be directed upwardly by means of a reflecting prism. When a lid of the bath is closed, the beam leaves the space defined by the path through an exit port in the lid, and is incident upon a specimen mounted on a specimen holder located above the exit port, the specimen holder being secured to an injector rod.

Abstract: A decorative lampshade comprising translucent sealed walls, in which a translucent body surrounded by a liquid is located. The height of the body and the distance between the body and walls can be adjusted by bolts extending outside the lampshade. Adjustment of the bolts regulates the brightness and color of the lampshade.

Abstract: An infrared radiation filter lens for aircraft lights is comprised of a heat-conductive filter frame disposed in heat-exchange relationship with an aircraft frame and/or its skin to dissipate heat in the filter frame to the aircraft body and the ambient; first and second window panels secured peripherally about longitudinal and transverse side edges by the filter frame in laterally spaced, generally conforming relationship defining a fluid cell therebetween; a fluid, infrared radiation filtration medium disposed for convective circulation within the fluid cell; and baffle members inwardly proximate the transverse side edges of the cell for deflecting convective circulation of the fluid along those sides of the frame. A method for infrared radiation filtration of aircraft lights is also disclosed herein.

Abstract: A non-light-emitting (passive) display such as a dichroic LCD is frontally illuminated with polarized light incident obliquely upon the display, the incident light having followed multiple paths to arrive at the display from multiple directions. Relative to a typical display viewing axis, some light arrives from one side of such axis and some light arrives from the other side of such axis. An appropriately positioned light emitter, preferably comprising a reflective cavity, lamp, and polarizer, casts some light directly on the display, and casts other light, which is also substantially collimated, on an appropriately positioned reflector which re-directs incident light to the display.

Abstract: A stick-on fog light lens, comprising a flexible sheet of amber colored transparent vinyl having a peripheral configuration cut to match that of the headlight of an automobile on which it is to be used, and a method of affixing to the headlight by moistening one side of the flexible vinyl sheet with water, placing the moistened side against the glass lens of the headlight, and pressing out excess moisture and air thereby leaving the flexible sheet fog light lens operably affixed to the headlight.

Abstract: An illuminating device for a display unit in which the display panel can be illuminated uniformly under a relatively constant luminous intensity. The illuminating device according to the present invention comprises a display panel, at least one light source and a reflector the inner surface of which is defined by at least two elliptical surfaces. One of two foci of each of the elliptical surfaces is located at the center of the light source and the other of two foci thereof is located on the inner surface of said display panel in order to focus rays of light reflected by the reflector on an area on the display panel away from the light source.

Abstract: This invention provides an improved reading or viewing lamp that achieves extraordinary visual acuity when properly used. The lamp employs a quartz-halogen bulb together with a parabolic lens to provide a collimated beam. A light filter removes heat radiation and ultra violet radiation from the beam. A convex mirror reflects the filtered light beam to the reading or viewing area where because of the point source characteristic of the bulb and the remaining optics, the rays are substantially non-crossing and transversely coherent in the reading or viewing area. In one embodiment, the collimated beam is directed vertically and tubular light shield surrounding the collimated light beam and a cylindrical shield around the convex mirror reduces transverse radiation of light to other parts of the room. The shield around the collimated beam also provides a chimney effect which disperses the heat throughout the room to points remote from the reader.

Abstract: A colored lamp is emitting colored light of a given range of wavelengths and particularly useful for interior and exterior lighting, for luminous advertising, for street lighting, for signal lights and for decorations characterized by a source of light and an arrangement for absorbing a light wave spectrum which has a shorter wavelength than the given range and for emitting light with a longer wavelength due to photo-luminescence with the arrangements including at least one body provided with a luminescent substance for absorbing the light and emitting the luminescent light. The body may be formed by a container of liquid, a bundle of optical fibers or a solid member which acts as a light concentrator in such a manner that the incident light is collected and conducted by means of a photo-luminescent scattering and subsequent total reflection at the boundary surfaces of the body, with the luminescent light being emitted in specific output locations.

Abstract: A series of electric lamps spaced along the interior of a flexible vinyl tube, such lamps being connected in electric parallel with each other by a pair of insulated conductors that exit from the tube through an opening adjacent one end of the tube. A thermoplastic sealant having a vinyl content is applied by a special procedure into each of the ends of the tube to seal closed such ends of the tube as well as the point of egress of the conductors. The tube is disposed in a channel-like mounting bracket having a restricted entrance through which the tube is viewable. A special procedure is provided for connecting uninsulated leads of the lamps to insulated parallel conductors such that no additional insulation is required.

Abstract: A simulated rain on a window pane panel assembly that can be used as a room divider, a head-board for a bed, a window replacement, or a door. It has a minor frame assembly having a pair of vertical side frame members interconnected adjacent their respective bottom ends by a bottom frame member. A pair of clear plastic panels cover the front and rear of the minor frame assembly to form a water tight chamber therebetween. A primary tubular member extends substantially across the width of the minor frame assembly adjacent its top and the primary tubular member is also positioned between the laterally spaced clear plastic panels. A plurality of apertures are formed in the bottom surface of the primary tubular member across its length. A major frame assembly laterally surrounds the minor frame assembly, and it contains shelves, speaker cabinets, a built in psychodelic light system, and a storage area beneath the minor frame assembly.

Abstract: A device for illuminating a liquid drink for use at a party or a social event to give the appearance of an illuminated liquid. The device has a light adapted to colimate a beam of light through the transparent bottom of the glass receptacle into the liquid and be dispersed therein. Rechargeable or non-rechargeable batteries are secured within the base to act as a power source for the light. A switch means comprising of upwardly contacts to contact a conductive ring of the base of the glass receptacle forms the on or off means for the switch. A modified form would utilize a coaster which may be used with stem ware and would be activated by the weight of the glass upon the coaster. The still modified form would be formed by a manual operated switch which may be used with the light formed in a chamber formed in the box under the glassware. A charger base utilizing inductive principles is used to recharge rechargeable batteries if used in that particular embodiment.

Abstract: The angular distribution of illumination passing through a selectively diffusing element can be varied by placing the diffusing element in a reflector unit so that the diffusing element is in the path between a light source and the object to be illuminated. A variable diffuser can comprise a liquid-crystal cell driven by a variable voltage to control the amount of diffusion by the reflector unit. The control voltage can be set in accordance with change in focal length in a zoom lens of a camera using the light source and reflector unit as a flash gun.

Abstract: Decorative light tubing, which has unbased miniature lamps connected in series by soldering or welding the ends of the flexible wire leads together to form parallel strings between a pair of elongated parallel wire conductors, is substantially filled with mineral oil or other clear, viscous dielectric fluid to protect the lamps and wiring against the adverse effects of vibration, shock and moisture while also enhancing the visual effect.

Abstract: Method of drying photo developing ink printed on sheet material, said method comprising the steps of conveying the sheet material through a developing zone below a line source of ultra-violet light, the line of said source lying at an angle to the direction of conveying movement with a reflector behind the line source so that both direct and reflected ultra-violet rays are directed towards the sheet material, with a transparent heat sink filter for infra-red rays disposed between the sheet material and the ultra-violet light source to filter between 5 and 50% of all of the direct rays from the source.