Abstract: (1) A light radiation stand for holding a light emitting end of a light-transmitting fiber optic cable is described. The light radiation stand comprises a stand base, one or more deformable flexible conduits vertically installed on the upper part of the base, a fiber optic cable holding means mounted on the tip end portion of each conduit and a mirror integrally mounted to the base.

Abstract: A rainbow forming device includes a light guide for transmitting visible light therethrough and a prism having a cross-section of a substantially equilateral triangle for splitting the light into a series of colors of the spectrum to form a rainbow. A light-emitting end of the light guide is set with its axis perpendicular to the prism's first edge. The visible light emitted from the light guide's end passes through the prism along the path from prism's first vertex including the prism's first edge to said prism's second vertex and the light split into colors of the spectrum are emitted from the prism's third vertex and forms a rainbow.

Abstract: A light radiator has a tubular body bearing at the center of one end a removable light-emitting end of a fiber optic cable and having at the other end a large number of light-guiding rods arranged tightly and parallel to each other. The light-guiding portion includes two groups of light-guiding rods, the first group consisting of rods having their light-emitting end-surfaces on the same plane and the second group consisting of rods having their end-surfaces on a plane lower than that of the first group's rods. Each light-guiding rod of the first group and each light-guiding rod of the second group are in contact with each other at least on one side and each light-guiding rod of the second group has a tapered, concave-shaped output end.

Abstract: A combination of a first-optical connector attached to a light-receiving end of a first fiber optic cable and a second-optical connector attached to a light-emitting end of a second fiber optical cable are connected so as to transmit the light from the second fiber optic cable into the first fiber optic cable. The first optical connector has a first-terminal holder capable of fixing to a relative position of fiber end faces therein and having a face which is even with the optical fiber end-faces and also having at least two locating holes therein. The second connector has a terminal holder capable of fixing a relative position of the light guide end faces therein and having a face being even with the optical fiber end-faces and also having at least two locating pins positioned opposite the corresponding locating holes of the first optical connector.

Abstract: A solar ray collecting device comprises a solar ray collecting portion including a number of solar ray collecting elements, a transparent dome for covering the solar ray collecting portion, a base plate for supporting the dome, a first-revolution shaft for rotating the base plate, a support arm for supporting the first-revolution shaft and a second-revolution shaft for rotating the support arm around an axis being perpendicular to that of the first revolution shaft. The first revolution shaft and the second revolution shaft are controlled in such a way as to direct the light receiving surface of the lens system toward the sun to introduce solar rays into the optic fiber cable. Each solar ray collecting element is provided with a correct mounting means for setting the light-receiving surface of the element at a right angle to the light that has passed through the dome.

Abstract: A light radiator comprises a light-guide rod and a transparent tube. The light-guide rod has a slotted portion or a concave portion on its' body's circumference. The transparent tube is closely fitted to the light-guide rod to seal watertight the slotted portion or the concave portion of the rod. The transparent tube is made of thermally shrinkable material.

Abstract: A light radiator is described which is capable of being threadably attached to the light-emitting end of a fiber optic cable to radiate light rays transmitted therethrough. The light-guide rod has a thread at a circumference of its one end in order to be threadably connected to the light-emitting end of the fiber optic cable and the light-guide rod has a spiral groove at its circumference. The spiral groove gradually getting deeper as it approaches the rod's tip in order to diffusively radiate the light therefrom.

Abstract: A container for accommodating a solar ray-collecting device comprises a cylindrical body and a transparent dome mounted on the body for accommodating therein the solar ray-collecting device. A fin for mounting the dome on the cylindrical body is unitarily attached to the lower opening end of the dome. The cylindrical body has therein a stand for carrying thereon the solar ray-collecting device. The lower end of the cylindrical body is cut off along the slanted surface of the roof.

Abstract: A container for accommodating a solar ray-collecting device comprises a cylindrical body and a transparent dome mounted on the body for accommodating therein the solar ray-collecting device. A fin for mounting the dome on the cylindrical body is unitarily attached to the lower opening end of the dome. The cylindrical body has therein a stand for carrying thereon the solar ray-collecting device. The lower end of the cylindrical body is cut off along the slanted surface of the roof.

Abstract: A transparent capsule is manufactured by using a lower die case having a substantially semi-spherical inner surface and an upper die cast having a substantially semi-spherical outer surface. The radius of the upper die cast is slightly smaller than that of the lower die cast. Transparent resin in the space between the lower die cast and said upper die cast is uniformly and gradually heated and then cooled in order to harden the transparent resin.Thereafter, the upper die cast is separated from the lower die cast and the transparent resin formed in the shape of a sphere is removed from the die casts.

Abstract: A light ray radiation stand capable of radiating light rays transmitted through an optical conductor cable in an optical desired direction comprises a foundation, a deformable flexible conduit vertically installed on the foundation, and an optical conductor cable. The optical conductor cable is inserted into the conduit and has one end terminating at the tip end portion of the conduit and another end terminating at the circumferential portion of the foundation through the interior of the foundation. The optical conductor cable is capable of being connected with an optical conductor cable at the side of the foundation. The stand is constructed in such a way that light rays are emitted therefrom at the tip end of the conduit.

Abstract: A cleaning device for cleaning the external surface of a spherical dome in which two transparent, almost semi-spherical bodies are joined with each other by the use of a flange mechanism to form an almost spherical dome and in which a solar ray collecting device is accommodated. The cleaning device comprises fixed members of a oneside-opened and hollow rectangular shape capable of being attachably and removably joined to a portion of the flange mechanism.

Abstract: A light ray radiation device for use in medical treatment comprises an enclosed body having an inner surface capable of reflecting light rays and a cross-section made up of a polygon having an odd number of sides and an optical conductor for radiating visible light rays into the enclosed body. The device is constructed in such a way that the visible light rays can be reflected on the inner surface of the enclosed body and pass through the central portion of the enclosed body.

Abstract: A solar ray-collecting device comprising a Fresnel lens, an optical coupling made of a tip-cut conical light guide and an optic cable is described. The solar rays focused by the lens are received at the large end of the optical coupling and discharged from the small end of the optical coupling and further guided into the optic cable. The Fresnel lens has a numerical aperture smaller than that of the optic cable. The optical coupling has the light-emitting end with the numerical aperture equal to that of the optic cable so as to eliminate the reflection loss. The light-emitting end of the optical coupling being adhesively joined to the light-receiving end of the optic cable by the use of an optical paste.

Abstract: An apparatus for photosynthesis has a reaction bath in which a plurality of narrow tubular photoradiators are arranged to radiate light therefrom and spaced from each other by a distance which is not more than about 2 mm. Each photoradiator has a cross-section which is cylindrical, equilateral triangular, tetragonal or hexagonal. A baffle plate is disposed below the photoradiators and is formed with a number of apertures therethrough in a predetermined area thereof which may be a radially central area or a generally annular peripheral area. CO.sub.2 -containing air is fed into the reaction bath through the apertures in the baffle plate to circulate along a predetermined path inside the reaction bath due to the remaining non-apertured part of the baffle plate. The function of the baffle plate may be performed by plugging which blocks the passage of the air through the spacings between the lower ends of the adjacent photoradiators in the predetermined area.

Abstract: A light radiation device for use in medical treatment comprises a ring-shaped light source portion and a cylindrical transparent light radiation portion. The ring-shaped light source comprises a connector for connecting a fiber optic cable thereto and a plurality of optical fibers each having one end connected to the connector and having another end terminating at one end of the ring-shaped light source portion so as to form a light-radiating surface thereon. The cylindrical light radiating portion has one end removably connected to the light-radiating surface of the light radiation portion and another end having a large number of tapered teeth thereon.

Abstract: A light radiation device for use in medical treatment is described. The device comprises a fitted portion for engaging with a light source having a ring-shaped light-radiating end-surface, a cylindrical transparent base portion held in the fitted portion and having one end facing to the light-radiating end-surface of the light source portion and a light-radiating portion comprising of a large number of transparent tapered light-radiating elements arranged at the other end of the cylindrical transparent base portion. The cylindrical base portion is covered with a light-reflecting layer or a clad layer at its outer and inner cylindrical surfaces.

Abstract: An optical connector comprises a first cap-nut-shaped connecting member having an internally threaded socket with a flat bottom to threadably engage with the threaded protective tube end of the first optic cable, a second bolt-shaped connecting member having a bore there-through and threadably engaged with the first cap-nut-shaped connecting member, a third connecting member and a fourth connecting member loosely inserted in the through-bore of the second bolt-shaped connecting member and having a flange at its opposite sides for threadably engaging with the threaded tube end of the second optic cable member. The end-surfaces of the fiber optic cable member and the second optic cable member are arranged opposite to each other. The third member's flange being caught between the second connecting member's bottom surface and the first connecting member's socket bottom surface.

Abstract: A stand used for stably placing a solar ray collecting device on a veranda or the like comprises an upper base for directly and securely holding the solar ray collecting device, a hanger fixed to the base and hanging from a fixed construction such as a wall-like supporting member, being parallel to the solar ray collecting device, and a lower fixed base for adjustably supporting the upper base.

Abstract: A mechanism for positioning the light receiving end of an optical conductor cable at the focal position of a lens comprises an optical conductor cable supporting member for supporting an optical conductor cable, and a fixing device for fixing the light-receiving end of the optical conductor cable to the cable supporting member. The fixing device comprises a cap nut provided with a slit through which the optical conductor cable is inserted in the direction of the optical axis, a male screw threaded on the cable supporting member and engaged with the cap nut, and a collar portion formed on the outer circumference of the optical conductor cable at the light-receiving end thereof.