JPH0854577A - Sunbeam condensing and transmitting device - Google Patents

Abstract

PURPOSE:To make it possible to efficiently utilize sunbeams with a compact device by arranging a solar battery on the side opposite to the reflection surface of a reflection mirror having characteristics to allow transmission of non-visible light and irradiating the solar battery with the non-visible light transmitted through the reflection mirror, thereby generating electricity. CONSTITUTION:The sunbeams are reflected and condensed by the reflection mirror 1. These reflected and collected sunbeams are transmitted by an optical fiber 3. The reflection mirror 2 has the characteristic to allow transmission of the non-visible light and is arranged with the solar battery 2 on the side opposite to the reflection surface of the reflection mirror 1. The electricity is generated by irradiating the solar battery 2 with the non-visible light transmitted through the reflection mirror 1. The reflection mirror 1 is preferably a concave mirror or a Fresnel mirror equiv. to the concave mirror and the shape of the reflection surface is preferably a paraboloid in terms of aberrations. The solar battery 2 which has the sensitivity sufficient to the UV light and IR light transmitted through the reflection mirror 1 is more preferable. The solar batteries of a single crystal silicon type and polycrystal silicon type have the low sensitivity with UV light but have the high sensitivity with IR light and are, therefore, more preferable.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solar concentrating and transmitting device.

[0002]

2. Description of the Related Art Conventionally, various solar light concentrating and transmitting devices using optical fibers have been commercialized. However, in order to direct the concentrating part of the solar light concentrating and transmitting device toward the sun, Drive power for moving parts is required, and commercial power is used as drive power, and power cost is required as running cost. Among these conventional solar light concentrating and transmitting devices, when realizing an equivalent amount of light with an electric lighting device, there is one that consumes more power than the power consumption of the electric lighting device,
Not economic.

In order to solve such a problem, a solar light concentrating and transmitting device has been proposed which can be driven only by the power generated by a relatively small solar cell. However, such a solar light concentrating and transmitting device has a drawback that the size of the entire device becomes large because it is necessary to dispose the solar cell on the light receiving surface of the light converging portion.

[0004]

DISCLOSURE OF THE INVENTION The present invention is intended to solve the above-mentioned drawbacks of the prior art.
A solar light concentrating transmission device, which has not been known in the past, is newly provided.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, in which sunlight is reflected and condensed by a reflecting mirror, and the reflected and condensed sunlight is transmitted by an optical fiber. In the concentrating and transmitting device, the reflecting mirror has a property of transmitting invisible light, the solar cell is arranged on the opposite side of the reflecting surface of the reflecting mirror, and the invisible light transmitted through the reflecting mirror is applied to the solar cell. According to the present invention, there is provided a solar light concentrating and transmitting device characterized by being configured to generate power.

Further, the present invention comprises an optical sensor for detecting the direction of the sun, a motor for moving the reflecting mirror, and a control device for controlling the motor. The signal from the optical sensor is judged by the control device and reflected. When the reflecting mirror is moved by a motor so that the optical axis of the mirror faces the direction of the sun, at least one of the power source of the control device and the power source of the motor is a solar cell, provide.

[0007]

Embodiments will be described in detail below with reference to the drawings. FIG. 1 is a basic configuration diagram of the solar light concentrating and transmitting device of the embodiment. In FIG. 1, 1 is a reflecting mirror, 2 is a solar cell, 3
Is an optical fiber, 4 is a holder, 5 is a condenser, 6 is a motor, and 7 is a controller.

The reflecting mirror 1 is preferably a concave mirror or a Fresnel mirror equivalent to a concave mirror, and the shape of the reflecting surface is preferably a parabolic surface from the viewpoint of aberration. Further, the material of the reflective film of the reflecting mirror 1 needs to be a material that transmits visible light and transmits invisible light. It is more preferable that the change is sharp. For example, a dielectric multilayer film in which thin films of metal oxide are stacked has such characteristics. Further, it is preferable that the base material of the reflecting mirror 1 is sufficiently transparent to invisible light transmitted through the material of the reflecting film.

The solar cell 2 is preferably one having a sufficient sensitivity to the ultraviolet light and infrared light transmitted through the reflecting mirror 1. Further, if a material having high sensitivity in the wavelength region of ultraviolet light and infrared light cannot be obtained, a material having sufficient sensitivity to infrared light is preferable. Because the proportion of sunlight energy that can be received on the ground by wavelength is a few% for ultraviolet light, 35% -40% for visible light, and about 60% for infrared light, and most of the invisible light is This is because it is infrared light. However, the wavelength range of visible light is 400 nm to 700 nm here.

The types of commercially available solar cells include single crystal silicon type, polycrystalline silicon type, amorphous silicon type, etc. Among these, the single crystal silicon type and polycrystalline silicon type solar cells are for ultraviolet light. Is low in sensitivity but high in sensitivity to infrared light, which is preferable. This is because the other amorphous silicon solar cell has a peak sensitivity in the visible light region and low sensitivity in the invisible light region.

In the present invention, since the light condensed by the reflecting mirror 1 is only visible light, the optical fiber 3 may be any one that can transmit at least high density visible light with low loss. Clad / silica) optical fibers are preferred.

The solar cell 2 receives solar radiation to generate electricity. The generated electric power can be used as an operating power source for the solar light concentrating and transmitting device of the present invention and other devices at the same time as the electric power is generated, and can also be used when required by charging a secondary battery.

[0013]

According to the present invention, since sunlight can be transmitted by the compact sunlight concentrating and transmitting device and the sunlight can be used to generate electricity, the sunlight can be efficiently used.

Further, when power is consumed inside the solar light concentrating and transmitting device, it is not necessary to use a commercial power source.
It also has the effect of being economical because it requires no running costs.

[Brief description of drawings]

FIG. 1 is a basic configuration diagram of a solar light concentrating and transmitting device according to an embodiment.

[Explanation of symbols]

 1: Reflector 2: Solar cell 3: Optical fiber 4: Holding device 5: Condensing part 6: Motor 7: Control part

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Claims (2)

[Claims] 1. A solar light concentrating and transmitting device for reflecting and condensing sunlight by a reflecting mirror and transmitting the reflected and condensed sunlight through an optical fiber, wherein the reflecting mirror has a characteristic of transmitting invisible light. A solar concentrating and transmitting device characterized in that a solar cell is arranged on the side opposite to the reflecting surface of a mirror, and power is generated by irradiating the solar cell with invisible light that has passed through the reflecting mirror. 2. A light sensor for detecting the direction of the sun, a motor for moving a reflecting mirror, and a control device for controlling the motor, and a signal from the light sensor is judged by the control device to determine the optical axis of the reflecting mirror. The solar light concentrating and transmitting device according to claim 1, wherein, when the reflecting mirror is moved by the motor so that the solar cell faces the sun, at least one of the power source of the control device and the power source of the motor is a solar cell.