Abstract: A light rays bathtub has an inner surface formed as a reflection surface and an optical conductor for radiating visible light rays into the tub. The bathtub is so constructed that the visible light rays are radiated over the entire area in the tub. An entire body can bath effectively in the light rays consisting of only the visible light ray component not containing therein harmful ultraviolet, infrared or the like.

Abstract: An apparatus for photosynthesis includes a unique arrangement for supplying light and CO.sub.2 -containing air to a reaction chamber in a sure and stable manner. The reaction chamber is irradiated for photosynthesis from the inside and/or outside thereof in an intermittent mode. CO.sub.2 -containing air is routed from a CO.sub.2 source to a rotatable disc which is positioned in a bottom portion of the apparatus. Part of the CO.sub.2 -containing air is ejected sideways from the disc to cause it into rotation, while the rest of the air is ejected upwardly into the reaction chamber. The reaction chamber is partitioned into a plurality of compartments which are sequentially supplied with the CO.sub.2 -containing air in accordance with the rotation of the disc.

Abstract: A cultivation device by use of water-and-air mixture. The device comprises of an air pump having an ejecting outlet end portion installed in a culture fluid tub, a water guiding tube having a cone-shaped inlet opposing to the discharging outlet in the culture fluid tub, a lever mechanism for storing culture fluid emitted from the other end portion of the water guiding tube at the location of the end portion thereof and discharging the culture fluid when the amount of the stored culture fluid comes up to the predetermined one, and cultivation pallets by use of water-and-air mixture, which are installed in an inclined state and supplied with the culture fluid discharged from the lever mechanism.

Abstract: A time-sharing light distribution apparatus steers optical energy conducted thereto from a single source of optical energy supply to a plurality of remote locations or directly to the ambience. A light conducting rod receiving the optical energy at one end thereof includes an inclined surface for reflecting the optical energy to the ambience or to branch light conduction paths. A motor or like drive causes the light conducting rod to pivot or rotate about an axis thereof, thereby distributing the optical energy for desired applications such as photosynthesis.

Abstract: A large number of optical conductor cables are integrated and connected to a single optical conducting rod for use in transmitting light energy to a distant place through the optical conducting rod. The integrated construction is comprised of a large number of optical conductor cables and a large number of optical fibers, the bundle of which is unbound at one end of each optical conductor cable. A cladding layer of each optical fiber being cut off and the edge surface thereof being arranged on the same plane and then unitarily bound thereon by the use of an adhesive or the like. The bound portion of each optical fiber being approximately in the shape of a head-cut circular cone, and each optical fiber being approximately parallel with each other at a place near to the edge surface thereof.

Abstract: An apparatus for plant cultivation includes a sealed dark chamber and a sealed lighted chamber which accommodate a root portion and a stem and leaf portion of a plant respectively. The lighted chamber is defined by a transparent housing above the dark chamber and the lighting is provided by optical fibers. The dark chamber is supplied with nourishment, oxygen and the like, while the lighted chamber is supplied with CO.sub.2 -containing air which is controlled to a predetermined temperature and humidity. The supply of light occurs on a scheduled basis in accordance with a state of stomata of the plant.

Abstract: A structure for positioning the light-receiving edge of an optical fiber comprises a large number of lens for focussing the light, and a large number of optical fibers, each having a photo-receiving edge arranged on the focus of the lens. A supporting plate has a large number of holes coaxial with each of the optical axis of said lens, and a retaining member retains the optical fiber movably along the direction of the optical axis. The retaining member is bound with an adhesive agent to the supporting plate, and the optical fiber is bound with an adhesive agent to the retaining member.

Abstract: A solar ray energy collecting device capable of effectively separating and collecting only a light component of a desired wave length among the solar rays. The solar ray energy collecting device comprises a light focusing lens being provided with a light intercepting member on the central part thereof, an optical conductor having a light-receiving edge situated at the position of the lens' focus, a reflector installed at the circumferential portion of the optical conductor, and means for collecting energy of the light component reflected by the reflector.

Abstract: An apparatus for plant cuture is disclosed which allows plants to be effectively grown even in basements and other places where solar radiation is unavailable, utilizing combined illumination by solar rays and artificial rays. Light source assemblies emitting the mixed rays are mounted on a housing in which plants grow and are movable therealong to periodically illuminate the plants, thereby promoting efficient photosynthesis. The light source assemblies may even be shared by a plurality of such housings which are arranged side by side or one upon the other.

Abstract: A light radiating device has a transparent cylindrical tube one end of which is connected by a light conducting cable or the like to a natural or artificial light source. A plurality of transparent plate and/or reflective plates are arranged in the tube to be rotatable respectively about independent axes which commonly extend perpendicular to the axis of the tube. When used for plant culture, for example, the plates are sequentially moved to reflect incoming light so that a plant growing in a position adjacent to the device is always illuminated from an optimum direction and under an optimum distribution of light. The axes of rotation of the plates extend in different directions from each other so as to radiate light over the entire circumference of the tube.

Abstract: A method of using a condensing lens which carries an optical filter in a central portion thereof which includes an optical axis. The filter intercepts ultraviolet rays and infrared rays except for those which are incident on an exposed peripheral portion of the lens. The filtered light is conducted by a light conducting cable to a plant culturing station for photosynthesis. The light receiving end of the cable is usually located at the focal point of visible rays output from the lens and, at the time of harvest, at the focal point of ultraviolet rays.

Abstract: A part of the light energy transmitted through an optical conductor is diverted and taken out of it.

Abstract: A solar ray collecting device suitable for being loaded and employed in a spacecraft. The device is made of a cylindrical cover, a plurality of round solar ray collecting portions, the light-receiving surface of which is equal in size to said cylindrical cover in square measure, supporting arms for rotatably supporting said solar ray collecting portions respectively, and supporting poles supporting said supporting arms respectively at the tip end portion thereof and capable of rotating and moving up and down. The solar ray collecting portions being taken out from the upper portion of said cylindrical cover at the time of being employed and accommodated in said cylindrical cover at the time of not being employed.

Abstract: A light conduction apparatus for photosynthetic reaction includes a rotatable light distributor which may be a transparent rod or disc. Converged light is guided by a solid or tubular light conducting member into the light distributor and routed along at least one optical path through the light distributor as far as a radiation surface of the latter. The light output from the radiation surface is supplied a moment to each of a number of light conducting rods, which lead to a confinement for photosynthesis, once for each full rotation of the light distributor. Thus, the confinement shares a single light source which can be small size for given dimensions of the confinement.

Abstract: A plant cultivating device enables plant cultivation by effective use of the floor's dimension at a place of high cost per unit dimension of the floor on the building erected in the urban district.The plant cultivating device comprises a cylinder and an upper plate for covering the upper portion of said cylinder. The cylinder being constructed by combining two side plates, the side surface of which is unitarily formed. The upper plate being constructed with transparent material.

Abstract: A light source device which employs light energy transmitted through an optical conductor cable as a photosynthesizing light source for cultivating plants. The light energy emitted from the optical conductor cable is effectively dispersed in order to nurture plants. The light source device is comprised of one or more optical conductor cables, a first base plate having one or more holes for inserting the optical conductor cables, a second base plate mounted adjacent to the first base plate on the lower side thereof and having one or more holes for inserting the tip end portions of the optical conductor cables passing through the holes of the first base plate, and a motor mounted on the first or second base plate for rotating it.

Abstract: A light by-passing device is connected in cascade between transparent cylindrical optical conductors, and is used for the purpose of by-passing and taking out a part of the light transmitted through them. Said light by-passing device is comprised of first and second transparent cylindrical members and three spacers of the same thickness interposed between the first and second cylindrical members. The shape of the first and second cylindrical members' edge surfaces are opposed to each other through the spacers that have first horizontal water level surfaces, inclined surfaces following the first horizontal surfaces, and second horizontal water level surfaces following the inclined surfaces. The spacer interposed between the inclined surfaces has a round hole through which light passes. It also has a grasping part used to insert or take out.

Abstract: A light radiator for effectively diffusing and radiating light rays which have been transmitted through an optical conductor. The light radiator comprises a transparent cylinder, optical means movably accommodated in the cylinder for reflecting light rays guided into the cylinder from the optical conductor and radiating the light rays outside the cylinder, and driving means for moving the optical means along an axis direction of the cylinder. The optical means being constructed with elliptic globe having a short diameter approximately equal to the inner diameter of the cylinder and comprising an air chamber having a reflection surface for reflecting light rays guided into the cylinder and radiating the same outside the cylinder in the inner space thereof. The driving means comprises optical oil filled in the cylinder and a liquid pump having an end portion communicating with the end portion of the cylinder and another end portion communicating with the other end portion of the same.

Abstract: A light source device which employs light energy transmitted through an optical conductor cable as a photo-synthesizing light source for cultivating plants. The light energy emitted from the optical conductor cable is effectively dispersed in order to nurture plants. The light source device is comprised of a hollow cylinder, a rotating support member for supporting the cylinder which rotates around a first axis perpendicular to the axis of the cylinder, a fixed supporting member for supporting the rotating support member which rotates around a second axis intersecting with the axis of the cylinder and another axis perpendicular to that of the cylinder, and a driving mechanism for rotating the cylinder around the first axis and the second axis at the edge portion of the cylinder, and an optical conductor cable inserted into the cylinder at a place near to the first axis, the edge portion surface of which is elongated to the other edge portion of the cylinder.

Abstract: A solar ray collecting device in which solar rays are focused by a lens and guided into an optical fiber and transmitted through the optical conductor onto an adequate desired portion for use in illumination or for others purposes. A solar ray collecting portion is comprised of a large number of lenses arranged on a common plane and optical fibers, the light-receiving edge of which are precisely positioned at the focal position of the respective lenses, a horizontal hollow shaft for rotatably supporting the solar ray collecting portion, and a vertical hollow rotating shaft elongated in a direction perpendicular to the horizontal hollow shaft and supporting the same unitarily. A drive means rotatably moves the solar ray collecting portion mounted on the horizontal hollow shaft around the same.