JPS58150903A - Optical energy transmission system - Google Patents

Abstract

PURPOSE:To transmit light energy effectively at low cost by using a hollow photoconductor tube as a photoconductor cable and saving quartz glass to be used. CONSTITUTION:The photoconductor tube 1 is made of a material having superior light transmittivity such as quartz glass. A blocking member 2 of a transparent body arranged at the hollow part on the photodetection side of this photoconductor tube 1 is made of a transparent material which has less refractivity than the tube 1, i.e. quartz glass. Therefore, light energy L incident to the blocking member 2 is transmitted to the side wall of the tube 1 through the blocking member 2 to propagate in the side wall of the tube 1, i.e. quartz glass with superior transmittivity. The photoconductive tube 1 is tapered at a light projection end part and coupled with a trailing photoconductor tube 1. Consequently, light energy is transmitted effectively at low cost.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an optical energy transmission system suitable for transmitting optical energy to a remote location.

The applicant previously proposed that sunlight be focused by a lens system and introduced into a light guide cable, and then transmitted through the light guide cable to any desired location for illumination or other purposes. .

Therefore, in order to realize the above-mentioned technology and requirements,
A light conductor cable is used to transmit sunlight focused by a lens system to a desired location. Since the cost was extremely high, the cost of the optical conductor cable was enormous, making it difficult to popularize it.

The present invention has been developed in view of the actual circumstances as described in -2- and -h, and in particular, a hollow optical conductor tube is used in place of the conventional optical conductor cable to replace the quartz glass portion. This saves money and reduces the cost of the optical energy transmission system, and also allows a large amount of optical energy to be introduced into the light guide tube to improve transmission efficiency.

FIG. 1 is a perspective view of an example of a light guide tube suitable for use in implementing the optical energy transmission method according to the present invention. A light guide tube made of material, 21 is a transparent closing member disposed in a hollow part on the light receiving end side of the light guide tube,
The closing member 2 is made of a transparent material having a refractive index smaller than the refractive index of the light-emitting tube 1, that is, the refractive index of quartz glass.
:! : It has been accomplished.

Therefore, the light energy L incident on the closing member 2 is
The light reaches the side of the light guide tube through the open base member 2, and is propagated through the side wall of the light tube, that is, quartz glass with excellent light transmittance (light transmittance of quartz glass (d: better than air)). The light guide tube 1 is configured to be tapered at the light output end and is connected to the next stage optical two-series integrated tube.In addition, in FIG. 1, the light receiving end {H! An example was shown in which light energy L focused by a lens system (not shown) was introduced into the surface.
The present invention is not limited to the embodiments described above, and for example, sunlight focused by a lens system is once introduced into an optical fiber such as an optical fiber, and the light transmitted through the optical fiber is directed into a light guide tube. In that case, the light-emitting ends of the multiple optical fibers through which the light energy is transmitted as described above are connected to the light-receiving end face of the optical body tube, that is, the side wall of the light guide tube 1. The end face of the formed quartz glass and the light-receiving end of the light guide tube are connected to the end face of the closing member, but in this way, a larger amount of light energy is introduced into the light guide tube 1. can be transmitted. Further, as shown in the figure, a large number of optical fibers 3 through which optical energy is introduced and transmitted as described above may be connected to the light receiving end 1 end face of the next stage light guide tube. In this way, it becomes possible to transmit even higher density optical energy. As described above, according to the present invention, the light energy is transmitted through the side wall of the photocorporeal tube, that is, the quartz glass portion of the light guide tube with very good light transmittance, but the light energy introduced through the cold-closing member 1iTj
Not all of the light energy is introduced into the side wall of the light guide tube, and some of it is transmitted through the hollow part of the light guide tube, but in order to effectively transmit even such light energy, it is necessary to , the light output end side of the light guide tube may also be closed with a light closing member to create a vacuum inside.
In this way, the scattering of light by the air is eliminated, and light can be efficiently transmitted, and there is no fear that the light guide tube will burst due to the expansion of the air. If the inner ring of the wall is thin, there is a risk that the light guide tube will be crushed by external pressure, so in such a case, it is advisable to fill the inside with an inert gas.

The present invention enables optical energy to be effectively transmitted through the outer circumferential wall of a hollow light guide tube as described above, and by connecting a large number of light guide tubes in cascade, light energy can be transmitted as desired. It is used by transmitting it to a location, and in that case the optical tube is shown in Figure 2 (
5) Prepare various types of light guide tubes as shown in (G) to (■→), and add '11 and others appropriately. As shown in the figure, for a photowetting tube in which the diameter of the light-receiving end and the diameter of the light-emitting end are different, a straight part l with the same diameter is provided, the straight part is covered with a cladding such as a polymer, and then By attaching it to the fixed board using the tool 4, there will be no leakage of light energy at the fixed part.
There are many ways to connect light guide tubes, but for example, if the light receiving and light emitting ends of the light guide tube are mirror-finished, the light receiving and light emitting ends can be bonded together by simply touching them. However, the light guide tubes can be rotatably connected to each other by providing a small distance between the light emitting end surface and the light receiving end surface, or by soaking the space between the U light emitting end surface and the light receiving end surface in oil. At that time, as shown in Figure 3, the light output end of the previous light guide tube is connected to the light receiving end of the next light guide tube.
) When inserting and sliding into part C, connect the light output end face of the previous stage σ)) L conductor tube to the occlusion layer of the next stage's foot and body tube:
If the connection is made at a slight distance from the light guide tube, the light energy reflected by the blocked part of the light guide tube in the next stage will leak to the outside through the side wall end face 1' of the light guide tube in the next stage. Una jJ, j to d, the above (t4
The end of the wall should be finished with a mirror finish [7 or Δ( should be a reflective surface. (Light reception of hemp body tube)'t...A figure showing an example of the case in which one side is connected with a side surface, Fig. 5 (〆V, Fig. 2 (A)... Part of the straight yL conductor tube shown and (G) ~ 0
．． 21 is a diagram showing an example of a light energy transmission path formed by combining parts of the optical conductor tubes with tapered parts shown in FIG.

As is clear from the twilight shown below, according to the present invention, it is possible to effectively transmit light energy at low cost by using a small amount of light extinguishing and a total of 1,000 tubes of quartz glass. can.

31) Simple Presentation Figure 1 is a configuration diagram for explaining an example of the optical energy transmission method according to the present invention, and Figure 2 is a diagram for explaining an example of the optical energy transmission method according to the present invention. FIGS. 3 to 5 are diagrams illustrating an example of a light guide tube suitable for use in the first embodiment, and FIGS.

1 light guide tube, 2 closing member, 3 optical age fiber, 4
Installation is done using tools.

Figure 2 ! 　J2 Figure 2 1 Figure 3 Figure 4 Figure 5 14-

Claims (7)

[Claims] (1) A furnace is made of a number of cascaded hollow light guide tubes, each guide tube having a light receiving end (the hollow part of 1i1 has a refractive index equal to or lower than the refractive index of the light guide tube). It is closed by a transparent closing member, and the diameter of the light output end is smaller than that of the light receiving end, and the light emitted from the light output end is received by the light guide tube in the next stage. A light energy transmission system characterized in that the light energy is transmitted to the next stage light guide tube via an end-side closing member. (2) The hollow portion on the light output end side is closed with a transparent closed sweetfish material 5 having a refractive index equal to or lower than the refractive index of the light guide tube. The optical energy transmission method described in Section LM (1). (3) The optical energy transmission system according to claim 4, wherein the hollow piece of the light guide tube is held in a vacuum by the closing material. (4) The hollow portion of the light guide tube is closed at both ends by the closing member, and an inert gas is sealed therein. optical energy transmission method. (5) Light reception of the light guide tube in the next stage i) Closing on the i4i side: The chamber member is disposed within a predetermined distance 1u11 from the light receiving end side end face of the light guide tube in the next stage, and the chamber member is placed in the hollow part of the light guide tube in the next stage. The optical energy transmission system according to any one of claims Jf+) to (4), characterized in that the optical red body tube of the preceding stage is configured such that the light source of the optical red body tube is inserted therein. . (6) Each of the light guide tubes is characterized in that at least a portion thereof has the same diameter over a predetermined length range.
Item 1: Izuwa's breakthrough optical energy transmission method. (7) The light-emitting end of the preceding-stage light guide tube and the light-receiving end of the next-stage light guide tube are rotatably connected to each other. No. (6th
) The optical energy transmission method according to any one of the items.