JPH10312709A - Night lighting system utilizing sunlight - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the exhaustion of the natural resources on the earth from being accelerated by collecting the sunlight with a light collecting installed at a portion illuminated by the sun on the earth, transferring the obtained light to a lighting system on the portion side not illuminated by the sunlight on the earth with a light transfer device for illumination. SOLUTION: The sunlight 10 entering a condensing lens 21 is condensed by the condensing lens 21 and sent to a light transfer device 22 as a light beam 11. The light transfer device 22 is installed to face an artificial satellite 13a and radiates the light beam 11 toward a reflecting mirror 16a provided on the artificial satellite 13a. Since the reflecting mirror 16a is fixed to reflect the light beam 11 toward an artificial satellite 13b, the light beam 11 radiated by the light transfer device 22 is reflected by the light transfer device 22 and enters a reflecting mirror 16b. The light beam 11 reflected by the reflecting mirror 16b is collected by a paraboloidal mirror 24 and sent into an optical fiber 25. The light beam 11 in the optical fiber 25 is radiated into a room through the optical fiber 25.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a night lighting system using sunlight.

[0002]

2. Description of the Related Art Illumination is indispensable in daily life activities in human society. In particular, nighttime lighting is essential even if you do not perform advanced social activities. There are various types of lighting means used for lighting at night, but they are roughly classified into the following two types. First, a combustible substance is burned, and light emitted during the burning is used as a light source. In addition to wood, tallow, resin, and the like, flammable substances obtained from natural resources, such as fossil fuels such as natural gas and petroleum, are used. In addition, illumination using light emitted by electric energy as a light source, such as a fluorescent lamp or various types of light bulbs, may be used.

[0003]

The above-mentioned conventional lighting is to obtain a light source by consuming natural resources. Naturally, flammable natural resources are burned, but most of electric energy also depends on thermal or nuclear power generation, so consuming natural resources such as fossil fuels and radioactive substances It is obtained. The usefulness of these natural resources is high, and they have become necessary energy sources not only for lighting but also for various applications. For this reason, the consumption of natural resources is enormous, and it has been pointed out that there is a risk of being depleted early. Further, it is very difficult to produce and supply these fossil fuels and radioactive materials from other materials. Thus, conventional lighting that consumes natural resources has the disadvantage of hastening the depletion of natural resources. In addition, there is a drawback that when natural resources are depleted, they cannot be used.

Accordingly, an object of the present invention is to provide a nighttime illumination system using sunlight which obtains a light source without consuming natural resources on the earth in order to solve the above problems.

[0005]

In order to solve the above-mentioned problems, an invention according to claim 1 is provided with a condensing device for condensing sunlight, and a light beam obtained by condensing sunlight by the condensing device. And a lighting device that receives the light beam transferred by the light transfer device and uses the light beam as a light source, and is illuminated by sunlight on the earth. The light condensing device installed on the partial side condenses sunlight, and the light transfer device transfers the light beam to the illuminating device installed on the part side of the earth that is not illuminated by sunlight, and illuminates it. Is characterized.

According to the first aspect of the present invention, the sunlight is condensed by the condensing device provided at a portion of the earth illuminated by sunlight, and the obtained light beam is transmitted by the light transfer device. Forward. The transmitted light beam is received at a part of the earth that is not illuminated by sunlight, and is supplied to, for example, each building and used as a light source for illumination. Thereby, nighttime illumination can be secured by using sunlight as a light source without consuming natural resources. Solar energy has a much longer available time before being depleted than natural resources on earth. Furthermore, since about half the area of the earth is always illuminated by sunlight, it is possible to stably supply the light rays.

[0007] Specifically, as the condensing device, for example, there is a device for converging sunlight by a convex lens, but a concave mirror may be used. As the optical transfer device, for example, using an optical fiber, provided a reflector on an artificial satellite orbiting around the earth, radiating the light beam toward this reflector, reflecting, in an area where it is desired to supply the light beam Receiving light. For example, a light receiving device may be provided as means for receiving the light beam, and the light receiving device may be provided on the lighting device side, or the light receiving device may be provided independently. Further, as a member for receiving the light beam by the light receiving device, a convex lens or a concave mirror may be used. Further, as an illumination device using the light beam, for example, the light beam supplied by an optical fiber may be emitted from the end of the optical fiber, or the light beam may be guided to a fluorescent tube to be used as an illumination device.

According to a second aspect of the present invention, there is provided a night illumination system using sunlight according to the first aspect, wherein the optical transfer device includes an artificial satellite in orbit orbiting the earth, Provided on each of the optical devices side, transferring the light beam from the optical transfer device provided on the condensing device side to the lighting device side via the optical transfer device provided on the artificial satellite, Features.

According to the second aspect of the present invention, in the nighttime illumination system using sunlight according to the first aspect,
A reflecting mirror as the light transfer device is provided on an arbitrary number of artificial satellites orbiting around the earth, and the light beams obtained by the light condensing device are reflected by the reflecting mirror, and sunlight on the earth Transfer to parts not lit. Thereby, even in an area where it is difficult to use the optical transfer device that transfers the light ray along the ground surface and the vicinity of the ground surface such as an optical fiber, such as a complicated terrain or a steep terrain, the light ray can be easily supplied. It is possible. still,
As the reflecting mirror, a plane mirror or a concave mirror may be used.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIG.

FIG. 1 is a schematic diagram showing an outline of a nighttime illumination system using sunlight according to an embodiment of the present invention. In FIG. 1, 1 is the sun, 2 is the earth, 3 is the portion lit by sunlight on the earth, 4 is the portion not lit by sunlight on the earth, and 10 is sunlight. Also, 12
Is a condensing device, 13 is an artificial satellite, 14 and 22 are light transfer devices, 15 is a lighting device, and 16 is a reflecting mirror as a light transfer device, which constitutes a night lighting system using sunlight. Reference numeral 11 denotes a light beam obtained by converging the sunlight 10 by the light condensing device 12. Note that the light-collecting device 12 is installed in the portion 3 of the earth that is illuminated by sunlight, and the light transfer device 14 and the illumination device 15 are installed in the portion 4 that is not illuminated by sunlight of the earth. In addition, the artificial satellite 13a is located above the part 3 illuminated by sunlight, and the artificial satellite 13b is located above the part 4 not illuminated by sunlight.

The condensing device 12 includes a condensing lens 21 and a casing 23. The condensing lens 21 converges the sunlight 10 radiated to the condensing lens 21 to obtain a light beam 11,
To the optical transfer device 22. Optical transfer device 22
Converts the light beam 11 obtained by the condensing device into an artificial satellite 13
This is a device that emits light toward the reflecting mirror 16a provided in the device a. The artificial satellites 13a and 13b are geostationary satellites orbiting the earth in a geosynchronous orbit. On the outer surfaces of the artificial satellites 13a and 13b facing the earth surface, reflectors 16a and 16b are fixed with their mirror surfaces facing the earth surface. ing. Optical transfer device 14
Is a parabolic mirror 24 and an optical fiber 25 as a light receiving device.
The parabolic mirror 24 receives the light beam 11 radiating from the earth and sends it into the optical fiber 25. Lighting device 1
5 is connected to the tip of the optical fiber 25, and the light beam 11 sent through the optical fiber 25 in each building
Is a lighting device using a light source.

Next, illumination by the above-described night illumination system using sunlight will be described. First, the sunlight 10 incident on the condenser lens 21 is converged by the condenser lens 21 and is transmitted as a light beam 11 to the optical transfer device 22.
The optical transfer device 22 is installed so as to face the artificial satellite 13a, and the reflecting mirror 16 provided on the artificial satellite 13a is provided.
A light ray 11 is emitted toward a. Since the reflecting mirror 16a is fixed so as to reflect the light beam 11 in the direction of the artificial satellite 13b, the light beam 11 emitted from the optical transfer device 22 is reflected by the reflecting mirror 16a and enters the reflecting mirror 16b. The light beam 11 reflected by the reflecting mirror 16b enters the parabolic mirror 24, is collected, and sent into the optical fiber 25. The light beam 11 that has passed through the optical fiber 25 reaches each building through the optical fiber 25 branched for each building, is emitted from the tip of the optical fiber 25 into the room, and is used as illumination.

Although the condensing device 12 is configured to collect the sunlight 10 by the condensing lens 21, it may be configured to collect light using a concave mirror. In addition, the artificial satellites 13a, 1
3b may use an existing artificial satellite and attach the reflecting mirrors 16a and 16b so as not to impair the original function of the artificial satellite. The number of the artificial satellites 13a and 13b may be any number as long as the light beam 11 emitted from the light collecting device 12 can reach the light receiving device 14.
Also, regarding the position of the artificial satellite 13b, the optical transfer device 1
As long as it is possible to transfer the light beam 11 to the portion 4, the portion need not be in the sky above the portion 4 not illuminated by sunlight. As the reflecting mirrors 16a and 16b, a plane mirror or a concave mirror may be used. Also, regarding the lighting device 15,
There is no particular limitation as long as the light source 11 is the light beam 11 passing through the optical fiber 25. Other details such as the structure can be changed without departing from the spirit of the present invention.

[0015]

According to the first aspect of the present invention, a nighttime illumination system using sunlight as a light source can ensure nighttime illumination without consuming natural resources on the earth. As a result, it is possible to obtain nighttime illumination means that can be used stably even when natural resources on the earth are depleted. In addition, since the lighting means does not consume the natural resources on the earth, the depletion of the natural resources on the earth is not accelerated.

According to the second aspect of the present invention, light obtained by condensing sunlight is transferred via an artificial satellite in an orbit orbiting around the earth, so that light near the surface of the earth such as complicated terrain can be obtained. For areas that have major obstacles to installing optical transmission equipment,
The transferred light can be easily supplied.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an outline of a nighttime illumination system using sunlight as an embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 sun 2 earth 3 part illuminated by sunlight 4 part not illuminated by sunlight 10 sunlight 11 light beam 12 condensing device 13a, 13b artificial satellite 14, 22 light transfer device 15 lighting device 16a, 16b reflector 24 Light receiving device (parabolic mirror)

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Kennori Takahashi 2- 10-26 Fujimi, Chiyoda-ku, Tokyo Maeda Construction Industry Co., Ltd. (72) Inventor Akiko Agatsuma 2- 10-26 Fujimi, Chiyoda-ku, Tokyo No.Maeda Construction Industry Co., Ltd.

Claims (2)

[Claims] A light condensing device for condensing sunlight, an optical transfer device for transferring a light beam obtained by condensing sunlight by the light condensing device, and a light transfer device for transferring the light beam transferred by the light transfer device. Receiving, and a lighting device using the light beam as a light source, the lighting system comprising: A night light system using sunlight, wherein the light beam is transferred by the light transfer device to the illumination device installed on a part of the earth not illuminated by sunlight, and is illuminated. 2. The optical transfer device according to claim 1, wherein the optical transfer device includes an artificial satellite in orbit orbiting around the earth, and the light transfer device provided on each of the light collection devices. The night lighting system using sunlight according to claim 1, wherein the light beam is transferred to the lighting device via the light transfer device provided in the artificial satellite.