Abstract: A lighting device comprising one or more light sources placed in respect to a concentrating concave or echelon main reflector, with the light emitted by the light source(s) being reflected by the main reflector so as to create a projected pattern of light to be directed onto a subject to be illuminated, a focusable light being achieved by shifting means capable of displacing or tilting the light source(s) with regard to the optical axis of the reflector. Said shifting means are apt to displace said at least one light source in a direction or at an angle to and from said optical axis of said reflector, in a plane substantially perpendicular to said axis, or to tilt the at least one light source(s). The light source(s) is(are) placed around said optical axis of the reflector and are movable or inclinable in a direction away from the optical axis of said reflector.

Abstract: A lighting device comprising one or more light sources placed inside a main reflector, with the light emitted by the light source(s) being reflected by the reflector so as to create a projected pattern of light to be directed onto a subject to be illuminated, a focusable light being achieved by shifting means capable of displacing the light source(s) with regard to the optical axis of the reflector. Said shifting means are apt to displace said at least one light source in a direction to and from said optical axis of said reflector, in a plane substantially perpendicular to said axis. The light source(s) is (are) placed around said optical axis of the reflector and are movable in a radial direction with regard to the optical axis of said reflector.

Abstract: A modular reflector element for a lighting device houses an elongated light-source such as a U-shaped cylindrical tubular lamp. The reflector element has a reflecting surface on the front face which is directed towards the light source, a series of ribs on the rear face, and lateral edge members formed by end ribs which are rearwardly inclined towards each other and with respect to a front plane.

Abstract: A device for holding a removable accessory in position on the casing of a flashlight includes retaining members which project outwards from the front wall of the flashlight casing and are placed around an opening through which a light source is passed. The device is also provided with means for simultaneous radial displacement of the retaining members between a position of release and a position of clamping of the accessory by cooperation of the retaining members with the neck of the accessory, and elements for ensuring that the means employed for displacement of the retaining members are controlled through the intermediary of a ring disposed coaxially with the opening through which the light source is passed. The retaining members are guided with radial slideways.

Abstract: A device for side-lighting a subject placed in front of a background as well as for lighting the background itself, for example when taking pictures of the subject by photography, cinematography or the like, consists of a series of reflecting panels attached to a solid or hollowed-out common central background wall or attached to each other around a free surface corresponding to the rear end-wall of the assembly. These reflecting panels are disposed in raised and inclined positions with respect to the background plane of the assembly in orientations such that said panels are capable of reflecting the light emitted by a front light source towards the subject to be photographed as well as towards the rear end-wall of the assembly, the assembly being of generally concave shape.

Abstract: A lighting appliance having high diffusion power, in particular for illuminating a subject when taking photographs, shooting films or the like. The appliance comprises a diffusion screen placed in front of a light source carried by the base of the lighting unit and a reflector placed behind the light source. The diffusion screen has at least two flat or curved faces directed both towards the front and towards the sides. The space delimited above the base of the lighting unit is closed at the rear by a reflecting wall and the top face of the base is also reflecting. A curved or faceted lateral cheek is provided opposite to the faces of the diffusion screen and on each side. The cheek face which is directed towards the diffusion screen is reflecting and the internal edges of the cheek are rigidly fixed both to the corresponding edge of the base of the lighting unit and to the respective rear edge of the diffusion screen.

Abstract: A light-diffusion box for illuminating a subject by means of a lamp placed within the box comprises in combination: a hollow rear casing having multiple facets and a reflecting internal face, the casing being constituted by a first sheet of opaque semi-rigid material provided with folding lines between the facets for collapsing the box to a flat state or for erecting the box in three dimensional form in readiness for use; a light-diffusing screen consisting of a translucent second sheet which is capable of assuming a flat shape; fasteners fitted respectively on the edges of the first sheet and on the edges of the second sheet; a central opening formed in the first sheet in order to place a light source in position within the diffusion box; folding lines which extend from the central opening to the periphery of the first sheet; a series of peripheral cut-outs formed in the first sheet with fastenable edges for converting the first sheet to a hollow casing; a polygonal contour at the periphery of the second she

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: This modular light-diffusing or reflecting plastic panel, notably for photography, motion-picture and television, comprises a cut panel (1), of semi-rigid material having formed therein by pressing a series of grooves (2, 3, 4), oriented to permit the folding of the panel (1) in different planes in order to impart a three-dimensional configuration thereto with multiple faces; folding tabs and tongues (8, 9, 12) are formed along the panel periphery for assembling it with other similar panels or closing the panel. Various three-dimensional configurations may be given to this panel while preserving its stability in the upright position on a horizontal planar surface. This panel is very light in weight and capable of diffusing or reflecting light in all possible angular directions.

Abstract: Device for the calculation of the geometrical characteristics of rectangles for the framing of various objects, usable especially in photography, architecture, industrial design.This device comprises a plate in which there is formed a preferably square aperture and which carries a graduation indicating a series of ratios between the contiguous sides of rectangles, a ruler mounted for pivoting on the plate and graduated in length, and an element mounted for pivoting on a slider displaceable on the ruler, the element having two perpendicular arms graduated in length, the element being capable of being locked in any desired angular position as a function of the rectangle to be defined.The invention permits of framing rectangles within predetermined limits, easily and with precision, indicating instantaneously to the user the geometrical characteristics of these rectangles.

Abstract: A light source usable as a projector for photography, motion pictures, television, or as a light panel, or as a lighting apparatus. This light source comprises a polyhedric housing constituted by a rectangular back 2, two trapezoidal lateral sides 4 inclined to the back 2, two limiting frontal faces 5 closed by translucent sheets, and one central face 10 for accessories such as grid-spots, filters, etc. The back 2 has an opening 3 for a light source, and interior 54 and exterior 80 reflectors are articulated on the back 2. This device makes it possible to vary the characteristics of the light source, notably its intensity, the angle lit, its color saturation, the contrast, the shadow sharpness, the reflections, etc., so as to obtain the desired effects. It is light in weight and inexpensive.

Abstract: A housing which is adjustable for height and within which is placed an object to be projected onto a screen also contains a light source and a reflecting system, the light emitted by the source being reflected onto the object. The top face of the housing is pierced in order to permit the passage of the luminous flux through an optical system which is placed above the housing and cooperates with a camera for photographing the projected image of the object on the screen. Adjustable means are provided for optical coupling between the camera and the assembly consisting of optical system and housing.

Abstract: In a device for the front lighting of a subject around a camera lens comprising a reflector, the summit of the reflector is truncated and provided with an opening behind which the camera lens can be mounted, the side wall of the reflector being provided with at least one opening with means for mounting an external light source in such a manner as to ensure that the light beam emitted by the light source is projected through the corresponding opening towards the interior of the reflector.