Abstract: A solar ray collector for a spacecraft includes six posts which are movable into and out of a housing section in the spacecraft and define respectively the apexes of a hexagon. Panel-like collector subassemblies are cantilevered respectively by cross-arms to be rotatable thereabout over 180 degrees between a folded inoperative position and an unfolded operative position. Each of the cross-arms bridges and slides up and down along its associated nearby posts. In the folded position, the subassemblies lie one upon another within the hexagon.

Abstract: A photoradiator has an elongate light conducting member which is supplied with converged light at one end thereof. Light radiating portions are arranged on the light conductor so that the light propagating through the light conductor may stream out in any desired light amount distribution along the axis of the light conductor. The radiating portions comprise spaced annular strips or spiral strips each being made of a material whose refractive index is larger than that of the light conductor. A mirror is positioned at the other end of the light conductor to reflect components of the incoming light which are substantially parallel to the axis of the light conductor, thereby promoting efficient radiation of the incoming light through the radiating portions.

Abstract: A balancer which carries a solar ray collecting device and decreases or eliminates the rocking motion applied to solar ray collecting device, as for instance, in the case of utilizing a solar ray collecting device on a violently rocking place in a ship or the like. By using such a balancer, the solar ray collecting device can always effectively collect the solar rays without being affected by the rocking motion of the ship or the like.

Abstract: A light projector for effectively projecting, in order, the light energy transmitted through an optical conductor cable within a wide range of space. The light projector is comprised of an optical conductor rod having a light-receiving edge surface and a light-emitting edge surface and which is bent so that the plane of the light-receiving edge surface and the plane of the light-emitting edge surface intersect each other. The light-receiving edge surface of the optical conductor rod is formed opposite to the light-emitting end surface of an optical conductor member at the light source side of the light projector, and a rotating mechanism is provided for turning the optical conductor rod of the light projector at a linear portion of the optical conductor rod following the light-receiving edge surface thereof.

Abstract: A solar ray collector device suitable for use in an equatorial zone is disclosed which includes a number of collector units mounted on a framework. The framework is angularly movable in the east-and-west direction about a shaft which extends in the north-and-south direction. Each of the collector units is rotatable about a shaft which is parallel to the shaft extending in the north-and-south direction. The framework is supported by a post which is rotatable about an axis thereof.

Abstract: A crane is comprised a foundation, a supporting pole elongating vertically from the foundation, an arm capable of rotatably moving on a plane parallel with the supporting pole, and a winding drum mounted at the tip end portion of the arm, the arm consisting of two arms elongating in parallel with each other, the drum being mounted between two arms. The crane is installed on the rooftop of a building or the like and capable of effectively pulling up an object from a narrow road onto a narrow rooftop and setting it up on a rooftop.

Abstract: A method for illuminating a spot inside a tunnel of a highway by the use of a solar ray collecting device which is to be used to focus a solar ray and guide it into an optical conductor. The solar ray transmitted through the optical conductor would illuminate an entrance portion of the tunnel and a light-emitting portion of the optical conductor would disperse so as to gradually weaken the illumination inside the tunnel in accordance with an increase of distance between the entrance portion and a spot to be illuminated in an inner space of said tunnel.

Abstract: A foundation has steps for mounting a large number of solar ray collecting devices. The steps have an approximately equilateral polygonal configuration, for instance, triangular, hexagonal, and the like and have an apex at their forward position. The solar ray collecting device is mounted on each of the polygonal steps, and the entire structure moves rotatably following the movement of the sun.

Abstract: An apparatus for controlling the amount of converged light having a high energy density which is transmitted through a predetermined optical path. The apparatus or light switch is disposed in the vicinity of the optical path and operable either in a stepwise manner or in a stepless manner as desired. A flat plate made of isotropic graphite serves as a light interceptor and is driven by an operation member into and out of the optical path within a plane which is perpendicular to the optical path. The plate does not reflect the light or become heated by the light due to provision of heat radiator means.

Abstract: An optical filter device includes a filter member which is located to intersect an optical path along which optical energy having a high density propagates. The filter member is constantly rotated to sequentially shift a part thereof on which the optical energy is incident. The axis of rotation of the filter member is movable perpendicularly thereto within a predetermined range. The filter member transmits a light component having a particular wavelength and reflects at least one of the light components in the other wavelength range.

Abstract: A light radiation device for trapping fish, comprising a light source, a reflecting mirror for reflecting the light from the light source so as to change it to parallel light, a lens system for focusing the parallel light from the reflecting mirror, and an optical cable into which the light focused by the lens system is introduced at one end thereof. The optical cable is provided at the other end thereof with a light leakage portion or a light radiator, which radiates the light onto or into the sea so as to attract the fish.

Abstract: A chlorella nurturing device comprises a chlorella nurturing tank constructed with a transparent material on the upper surface thereof and a reflection mirror assembly for reflecting downward vertically solar rays. The solar rays are reflected on the reflection mirror and guided into the chlorella nurturing tank through the transparent material at the upper surface thereof. The reflection mirror is constructed with a large number of dual-surface reflection mirror plates unitarily arranged in parallel in a south-north direction.

Abstract: A solar ray collecting device is comprised of a supporting base plate on which a large number of hexagonal recesses are provided and a large number of optical systems are arranged on each of said recesses. Each of said optical systems is made up of a hexagonal focusing lens of a dimension that is approximately the same as the hexagonal recesses and of a head-cut hexagonal pyramid which extends downward from the light collecting lens as an upper surface of said recess. An optical conductor which is a light-receiving surface is provided on the focus of said light collecting lens. Furthermore, the upper internal circumferential surface of the side wall forming said recess is so formed that it may be able to move freely on the surface of said hexagonal pyramid.

Abstract: A sunlight collector for collecting, in particular, diffuse radiation of sunlight comprising a cylinder having a relatively wide entrance aperture for receiving the natural light and a relatively narrow exit aperture for introducing the concentrated diffuse radiation into a light conductor. The inner wall of the cylinder has a plurality of tapered surfaces arranged in series and in which said tapered surfaces are of total reflection. The solar energy emanated from the exit aperture is of a higher density than the incident energy density and can be effectively utilized to illuminate the interior of a room.

Abstract: A lighting device of the free-standing type, capable of diffusing beams of light rays propagating through and emitting from the optical wave guides. A reflecting member is placed opposite the exit end of the optical wave guides to diffusingly reflect and diverge the light rays issuing from the optical wave guides thereby to light up a wide area with soft light rays.

Abstract: A sunbeam concentrating and collecting apparatus characterized in that a honeycomb or regular n-sided polygonal frame is configured with one or a plurality of regular n-sided polygonal holding frames each of which is respectively formed by coupling a plurality of frame pieces each of which is then provided with at least one or a plurality of angled portions. A lens or lenses are disposed along one end plane of the frame, and the lens or lenses are supported by the adjustable supporting means which are held by said frame.

Abstract: A solar ray collecting device which can be preferably used at a place near the North Pole or South Pole comprises a supporting post capable of moving rotatably, a rotatable shaft crossing perpendicularly to said supporting shaft at the top portion thereof, and a large number of solar ray collecting elements, each solar ray collecting element being rotatably installed around the shaft perpendicular to the rotatable shaft. Each of the solar ray collecting elements comprises a large number of lenses, an optical conductor having a light-receiving edge positioned at the focus of said respective lenses, and a transparent cover for covering the surface the lenses.A larger number of the lenses are arranged along a vertical direction rather than a horizontal direction. The cover is formed in the shape of a circular arc to the horizontal direction and is in the shape of a straight line to the vertical direction.

Abstract: A solar energy and electric lighting system wherein when the solar energy is available as in the day-time, it is utilized for lighting through conventional electric lamps, but when no solar energy is available or the solar energy available is not sufficient the electric lamps are turned on. Also disclosed are solar and electric light lamps which are capable of not only emitting solar energy but also light electrically produced, and which may be fabricated by minor modifications of conventional electric lamps.

Abstract: An artificial light source device includes a light source lamp, a reflection mirror for converting light from the light source lamp into a parallel beam of light, an optical conductor rod having a light-receiving edge surface arranged opposite to the reflection mirror such that the parallel light is guided into the rod, and an optical conductor cable comprising a large number of optical fibers, the light-receiving edge surface of the cable being arranged opposite to the light-discharging edge surface of the rod, the light discharged from the optical fibers being used as the light source.

Abstract: A solar energy collecting apparatus comprising a capsule being made of a transparent material, plurality of lenses capsulated in said transparent capsule and collect sunbeams, a sunbeam collecting means and heat collecting means deposited at the focal point of the lens, a photo-conductive cable which transmits the sunbeam collected by said sunbeam collecting means to the desired place and a heat transmitting pipe which transmits solar heat collected by said heat collecting means to the desired place.