Abstract: A solar ray collection apparatus includes a plurality of lenses mounted on at least one of the opposing flat surfaces of a lens mount. A plurality of light conducting members equal in number to the lenses are carried by a conductor mount which is held integral with and spaced from the lens mount by spacers and a frame, so that the focal point of each lens may coincide with the nearby end of its associated light conductor. The lenses, lens mount, conductor mount, spacers, and frame are made of materials the coefficient of expansion of which is equal to or substantially equal to each other, thereby overcoming the influence of the solar heat. Positioning means may be employed which moves the end of each light conducting member into alignment with the center of the adjacent lens, and then to the focal point of the lens and then fixes it in position. Stray beams in the apparatus may be converted into electrical energy at a suitable position or positions in the apparatus.

Abstract: A solar ray collection apparatus includes a capsule and a solar ray collector housed in the capsule. The solar ray collector is controlled to chase the sun in response to an output of a photodetector which may be located inside or outside the capsule. The capsule comprises a number of interconnected transparent members which are inclined by a specific angle which effects the most efficient collection of the solar energy at any position of the sun. The apparatus is excellent in mechanical strength and resistivity to wind due to unique configuration of each transparent member.

Abstract: An ornamental lighting device includes a plurality of optical fibers to which condensed light from a light source is distributed through a fiber optic cable. The optical fibers are arranged parallel to each other and held between a pair of light transmitting panels, which are rigidly mounted on a pedestal. Light propagating through the optical fibers is radiated through the light transmitting panels to the ambience. A plurality of such lighting devices may be arranged side by side and supplied by a common light source.

Abstract: A fishing net includes a photoconductive cable comprising a plurality of optical fibers having light-emitting portions, wherein said light-emitting portions are divided into a first group adapted to emit light having favorable influence upon fish and a second group adapted to emit light having an adverse influence upon fish. The direction of light emanating from said first group of light-emitting portions is counter to that of light emanating from said second group of light-emitting portions. Fish travel into the net influenced by the light of the first group and are discouraged from leaving by the light of the second group.

Abstract: A tubular light transmitting element made of silica glass having an excellent light transmission efficiency and serving to transmit optical energy from a light source to a desired location. The tubular member defines a bore thereinside which is plugged at its light inlet and light outlet end portions each by a material whose refractive index is equal to or smaller than that of the tubular member.

Abstract: The sunlight is converged by a lens into a fiber optic cable to propagate therethrough to a desired location. The light receiving end of the fiber optic cable is movable in two directions which are perpendicular to an optical axis of the lens and to each other and in a direction which is parallel to the optical axis of the lens. The movement of the cable end is effected by motors which are controlled by a remote controller through interengaged guide rods and gear elements.

Abstract: Provided is a sunlight direction sensor having a cylindrical body, a nontransparent flange having a diameter smaller than the inner diameter of the cylindrical body, a first photosensor disposed on the flange or substantially at the center of the inner bottom surface of the cylindrical body, and at least one pair of second and third photosensors which are disposed at the inner bottom surface of the cylindrical body and which are arranged symmetrically with respect to the axis of the cylindrical body, inner edges of the second and third photosensors corresponding to the inner periphery of the flange.

Abstract: A device for chasing a moving light source includes a plurality of photosensors arranged in elaborated positions for accurate operation. A top plate is formed with a calibrated cruciform opening to minimize indirect light tending to enter the device. Some of the photosensors expected to receive direct light through the cruciform opening are adjustable in position in two perpendicular directions relative to the remaining part of the device. The device can be disassembled for ease of production, maintenance, etc.

Abstract: A sunlight collecting and concentrating apparatus having a capsule enclosing lenses for collecting sunlight and a sensor for detecting changes in the sun's azimuth and altitude. The sunlight and ambient cold air are prevented from causing temperature fluctuations within the capsule, which would cause breakdowns and malfunctions of the sensor by provision of a suction pump or blower within the capsule to produce an air current around the sensor.

Abstract: An illumination element having a transparent flexible tube and a fine flexible light conducting member accommodated in the tube. The light conducting member is provided with a number of light outlet sections at spaced locations along its length. Light is incident on at least one end of the light conducting member and caused to break through the light outlet sections while propagating through the light conducting member. The light is available for ornamental lighting or the like.

Abstract: A sunshine simulator includes a support plate (10) for mounting thereon a model (M) of an urban district or building. The support plate (10) is angularly movable about a first axis (Y) which is perpendicular to the general plane of the support plate (10) and, also, about a second axis (X) which is parallel to the general plane of the support plate (10). The model structure (M) mounted on the support plate (10) can be put under any desired sunshine condition relative to a stationary artificial sun.

Abstract: A lighting device operable with solar beams propagating through and emitting from the optical wave guides. A pair of spaced concave and convex reflecting members are provided to effectively diffuse the solar beams issuing from the exit end of the optical wave guides. One of the reflecting members may be constituted by a mirrored electric bulb in order to ensure the lighting device to operate also by electric power.

Abstract: An apparatus for collecting and transmitting solar energy, which has lenses for collecting beams of sunlight and light guide cables or optical fiber cables for transmitting the collected beams. Light-receiving end faces of the light guides or the optical fibers are aligned with focal positions of light components of desired colors, respectively.

Abstract: A light diffusing device and an illumination apparatus employing the light diffusing device, the light diffusing device including a light transmission element and a light diffusing layer carried on and different in refractive index from the light transmission element, whereby light comes out from the device through the light diffusing layer. A number of such light diffusing layers are arranged in the light diffusing device of the illumination apparatus. The diffusing layers are provided with thicknesses which are different from each other or, otherwise, arranged to a density which varies along the device, thereby illuminating a desired object uniformly as a whole.

Abstract: An artificial light source arrangement includes a tubular light source whose horizontal light distribution curve takes on a substantial circle, a plurality of elongated linear lenses arranged parallel with the light source, and a plurality of photoconductors, each having its light-receiving end disposed along the focus position of each lens. Lenses may be arranged in coaxial relation to the light source, and the photoconductors may then have their light-receiving ends formed at the focus position of the lenses.

Abstract: An optical lighting device for diffusing beams of light rays propagating through and emitting from an optical conductor connected to a light source, comprising a semi-transparent hollow column, a first end plate which is connected to one end of the hollow column to close the same and which has a guide hole in which an outlet end of the optical conductor is fitted, and a second end plate which is connected to the other end of the hollow column to close the same.

Abstract: An apparatus for collecting and concentrating solar light energy comprising; a transparent container; movable lens means in the container, for collecting solar light energy; optical fiber means located at the focus of the lens means and extending to the outside of the container; first and second drive means for rotating the lens means about vertical and horizontal axes; solar cell means connected to the first and second drive means to drive the same; and, means supported by the lens means, for detecting the position of the sun, said detecting means being connected to the drive means to drive the latter in accordance with the position of the sun.

Abstract: A support arm for a sunlight concentrating and collecting apparatus of a large size. In such an apparatus, a heavy weight is applied to the support arm. Thus, the support arm becomes large in weight. On the other hand, the mass of the support arm must be minimized so as to track the sun's movement very quickly and smoothly. The support arm is provided with a first member having a curved plate formed substantially in the shape of circular arc, and a second member having an inverted saddle-shaped plate or plates, the second member being firmly fixed along the outer surface of the first member.

Abstract: There is disclosed a solar beam collector for use in collecting and condensing solar beams to introduce them into light guides or conductors. To ensure that almost all components of the white light and other radiations including ultra-violet and infra-red rays are introduced into the light guides, parabolic mirrors are employed in order to converge all of the solar beams having various wave lengths at the inlet of the light guides, thereby avoiding the problem of chromatic aberration. The solar beam collector is compact in size and comprises a first parabolic mirror for converging the arriving solar beams, a second parabolic mirror for condensing the beams from the first mirror into parallel beams, a third parabolic mirror for converging the parallel beams from the second mirror at a fixed focus, and a light guide having an inlet end placed at the focus of the third mirror.

Abstract: A sunbeam concentrating and collecting apparatus comprising a lens system for concentrating sunbeams and a light conductor cable. In order to obtain the most effective concentrating of the sunbeams, a beam-receiving end face of the light conductor cable must be precisely registered with the focus of the lens system.For this purpose, a cable holding means for holding the beam-receiving end face is constructed so as to be able to move and adjust in three directions perpendicular to one another at one point close to the focus of the lens system, by means of a position adjusting means. A light shielding plate is provided on the cable holding means.