Abstract: A clamp for a flash gun is provided which can be slipped on and off the gun and which has a slot therein whereby a bounce-flash reflector can be retained in said slot. In accordance with one embodiment of the invention, a second, opposed slot is provided so that one slot is adapted to retain a reflector and the opposite slot is adapted to retain a diffuser.

Abstract: A multilamp photoflash unit has a housing formed to provide a multiplicity of cavities, each having a reflective surface and formed to receive a flashlamp. Each of the cavities has a reflective surface width opening to flashlamp diameter ratio of less than about 1.2, and the cavity configuration includes a planar rear wall section and a pair of bi-planar sidewall sections.

Abstract: An electric flash device comprises a housing, a flash unit mounted in the housing and having a reflector which comprises a frame, a reflecting mirror carried by the frame, and a flash tube inserted into the reflecting mirror and having at least one pair of main current electrodes and a trigger electrode for triggering the flash tube and electrically connected to the reflecting mirror, the frame of the reflector being formed integrally with the housing.

Abstract: An adapter and process for fitting an Omega C-700 color head to an Omega D type condenser enlarger. The adapter includes a circular plate member having a flange along its periphery, a generally rectangular aperture and a circular recess, and an L-shaped bracket.

Abstract: Electronic flashgun having a rotatable reflector accommodating a discharge lamp, the reflector having means to move filters in front of the flash discharge lamp. The filters are inserted via an elongate coverable aperture (5) in an end partition (2a).

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: A photoflood light is disclosed having a generally rectangular housing provided with a reflector which is mounted as to be located forwardly of the housing and having additional portions which are pivotable relative to the housing and, when moved to a position of non-use, i.e. storage and/or transport, form together with the housing and the other components a flat generally rectangular body.

Abstract: To optimize light output from a multiple reflector photoflashgun powered by single elongated flashtube, the flashtube is positioned within a reflector having a curvature falling within the area defined by the curves A and B: ##EQU1##

Abstract: A zoom lighting device for projecting a generally rectangular illumination pattern whose size can be selectively changed. The device comprises a paraboloidal reflector and an artificial light source which cooperate to provide a collimated to nearly collimated beam of light which is circular in cross-section. The circularly-shaped light beam is intercepted by a pair of movably mounted crossed lenticular screens that are optically structured to change the circularly-shaped beam to a diverging generally rectangularly-shaped beam whose angles of divergence can be selectively changed by moving the screens relative to one another.

Abstract: An integrally constructed light stage is formed with a chamber having three translucent and interior reflective panels and a light reflective unit forming the back and floor. Hoods with light reflective interior surfaces cover the panels. Light sources are positioned between the hoods and panels and, if desired, beneath the floor. The object to be illuminated is placed within the chamber, usually on the floor. The light sources can then be activated as desired illuminating the object in a carefully controlled manner.

Abstract: Transverse areas lying between image areas of a moving photoconductive element can be discharged efficiently with sharp demarcations between the respective areas by an exposure device in which a flash lamp is disposed perpendicularly between two elongate side walls of a reflective housing having an open side and an elongate light-reflecting rear wall. A protective cover fixed near the lamp at the open side prevents direct radiation of the element from the lamp. Scatter of the reflected light is prevented by partitions fixed in parallel to the side walls in end regions of the housing space.

Abstract: A photoflash unit having one or more flash lamps, and a transparent cover in front of the flash lamps which is provided with elongated light-refractive prisms in front of each flash lamp so as to refract directly radiated light from the lamp when flashed in a more frontward direction and into the area to be illuminated. Prisms may be provided on both sides of the cover.

Abstract: The casing of a photoflash unit has an upper portion 1, the bottom of which is pivoted on a horizontal axis A--A at the top of the bottom portion 2, so that the top portion can be tilted back to raise the plane of two of the three reflectors lined up with the axis of tilt as their focal line, on which a photoflash tube is disposed. The third reflector, located in the middle between the two that can be tilted up, is fixed with respect to the bottom part of the casing and provides the minimum necessary amount of direct illumination.

Abstract: A portable illumination source for photographers which can be worn on the head of the photographer and there retained without attention by the photographer so that he can use both hands for manipulating his camera. The device includes a rigid frame on which is mounted a light source such as a photoflash to produce light rays on a path and a diffuser secured to the rigid frame within the path to diffuse light toward a subject that the photographer is facing. A suspension system for securing the rigid frame to the head of the photographer such that the apparatus can be employed without attention from the photographer.

Abstract: A photographic camera of the type which is adapted to utilize an artificial lighting assembly, e.g. a flashcube, for illuminating a scene to be photographed is provided with an optical element for intercepting light rays from the artificial lighting assembly to change its light distribution in a manner whereby the distribution of the intensity of illumination falling on the scene is made more uniform than it would otherwise be absent the optical element.

Abstract: A camera-mounted illuminating device particularly useful for motion picture photography to provide relatively constant lighting of close-up scenes in motion pictures despite movement of the camera toward and away from the scene.

Abstract: An electronic flash gun, particularly for photographic purposes, in which a ingle electronic flash discharge tube, which may be elongated or essentially ball or spherical-shaped, has associated therewith a plurality of reflector elements of which at least one can swivel or pivot about the flash tube to permit directing light from the single flash tube in multiple directions, for example for simultaneous illumination of a photographic subject directly as well as by bounce or reflected, indirect illumination.

Abstract: A luminaire includes a rectangular casing having side walls extending forwardly from a rear wall. A hand grip is adjustably secured to one side wall so that the casing can be held in one hand of a user, and a shaft is rotatably mounted in the casing and projects outwardly through such one side wall. A handle is secured to the projecting end of the shaft, adjacent the hand grip. A lamp socket is mounted on the shaft intermediate its ends and a lamp is mounted upright in the socket. A reflector assembly is interchangeably mounted in the casing and includes a small diameter inner parabolic reflector, a large diameter outer parabolic reflector coaxial with the inner reflector, and a transition zone interconnecting the reflectors.

Abstract: An attachment for a lamp, particularly for photographic purposes, including a frame, that surrounds and releasably engages the bulb of the lamp. Light blocking barn door panels and a scrim or other light modifying device can be supported by the frame.

Abstract: A prismatic protective shield for each flash-lamp and reflector combination as arrays of parallel prisms in order to level the light distribution with a tendency to produce an intensity dip at the pattern center. Arrays of horizontal prisms occupy a central vertical stripe of the shield plane. Arrays of vertical prisms are at each side of the horizontal prisms.

Abstract: A photoflash lamp array comprising a plastic housing containing flash lamps positioned over a circuit board carrying switching circuitry for sequentially firing the flash lamps. The circuit board is made of transparent electrically insulating material having a light-reflecting coating on its rear for reflecting light when the lamps are flashed. The front of the housing is provided with prisms to improve the distribution pattern of light when the lamps are flashed.

Abstract: A photoflash lamp array comprising a plastic housing containing flash lamps positioned over a circuit board carrying switching circuitry for sequentially firing the flash lamps. The circuit board is made of an electrically insulating material having a light-reflecting surface for reflecting light when the lamps are flashed. The front of the housing is provided with prisms to improve the distribution pattern of light when the lamps are flashed.

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.