JPS61209402A - Optical radiator - Google Patents

Abstract

PURPOSE:To diffuse effectively the light propagated through photoconductor pipes, etc. and to make the release of said light possible by providing notches to one end face of photoconductor rods in cascade junction parts. CONSTITUTION:The photoconductors 1-3 are cascade-connected in the propagating direction of light. The light released from the respective notched parts is effectively diffused and radiated in the slopes 1a' of the notched parts. The notched parts are formed to the end faces of the respective photoconductors as shown by the photoconductor rods or photoconductor pipes 2 and 3 and since plural pieces of the photoconductors formed with the notched parts at the end faces are cascade-connected, the formation of the notched parts is made easier than with an optical radiator. The accuracy of manufacture is thus improved.

Description

[Detailed Description of the Invention] The present invention effectively directs light transmitted through a light radiator, more specifically, a light guide rod, a light guide pipe, etc., to the outside of the light guide rod or light guide pipe. A light radiator for diffused emission, in particular consisting of at least two light guide rods or light guide pipes connected in cascade, with a cut in the outer circumferential wall of the light guide rods or light pipes at the connection point; It has a notch, and the light propagating within the light guide rod or the outer circumferential wall of the light guide pipe is diffused from the notch and emitted to the outside.

Recently, we have entered an era of energy conservation, and research and development on the effective use of solar energy is being actively conducted in various fields.However, in order to use solar energy most effectively,
It is to use sunlight energy as it is as light energy without converting it into other forms of energy such as thermal energy or electrical energy. From this perspective.

The present applicant focuses sunlight using a lens or the like, introduces it into a light guide cable, transmits it to any desired location through the light guide cable, and emits light through the light guide cable at the location to provide illumination. Various proposals have already been made regarding the use of Therefore, when trying to use solar energy for lighting as described above, the light propagating inside the optical conductor cable has directionality, so it is necessary to cut the end of the optical conductor cable. When light is emitted from the cut point, the radiation angle is usually 46° in the case of focused light, which is quite narrow. In cases where
Simply cutting the end of the light conductor cable and emitting light from the cut point does not provide satisfactory illumination. Therefore, the present applicant has made various proposals regarding an optical radiator that can effectively diffuse the light propagated within the optical conductor cable and uniformly illuminate a wide area. Basically, at least two light guide rods or light guide pipes are connected in series, and a notch is provided on the outer circumferential surface of the light guide rod or light guide pipe at the connection part. The light propagating within the light guide rod or the outer peripheral wall of the light guide pipe is effectively diffused by the cutout portion and radiated to the outside.

4 and 5 are side sectional views for explaining an example of a light radiator separately proposed by the applicant, and FIG. 4 shows a cutout 1a provided in the outer peripheral surface of the light guide rod 1,
A part of the light propagating inside the light guide rod 1 is diffused by the notch 1a and released to the outside of the light guide rod. FIG. 5 shows the outer periphery of the light guide pipe 1. A notch 1a is provided in the wall so that a part of the light propagating within the outer circumferential wall of the light guide pipe 1 is diffused by the notch 1a and emitted to the outside.

In these examples, the outer end 1a' of the notch 1a is inclined so as to open outward, and the end surface 1a' is aligned in the direction of light propagation (the longitudinal direction of the light guide 1) as shown in the figure. ), or open inward as shown by the dotted line in the figure.In addition, a large number of these notches may be provided along the direction in which the light travels; .

In particular, in the example shown in FIG. 4, if the depth d of the notch is increased sequentially along the direction of light propagation, the light can be emitted approximately evenly in the longitudinal direction of the light guide rod. be able to.

However, as described above, when a plurality of cutouts are provided along the traveling direction of light, it is very difficult to form the cutout portions.

Purpose The present invention was made in view of the above-mentioned circumstances.
In particular, the present invention aims to provide an optical radiator having a plurality of notches in the direction of propagation of light, in which the notches can be easily formed and can be manufactured with high precision. .

Figures 1 and 2 are exploded views for explaining the present invention in detail, respectively. In Figure 1, 1 to 3 are light guide rods or light guide pipes, and Figure 1 is an exploded view for explaining the present invention in detail. A conductor rod, although FIG. 2 shows an example of a light guide pipe.

In these embodiments, the guide bodies 1 to 3 are cascaded in the direction of light propagation in the order shown, and light is emitted from each cutout, similar to the light radiator shown in FIGS. 4 and 5. The light is effectively diffused and radiated at the inclined surface 1a' of the notch.6 In the present invention, as shown in the light guide rods or light guide pipes 2 and 3,
A notch is formed on the end face of each guide body, and a plurality of light guides having the notch formed on the end face are connected in cascade, so that the optical radiator shown in FIGS. 4 and 51i1 It is easier to form the notch compared to the previous method, and the manufacturing accuracy can be improved.

FIG. 3 is a diagram showing a modified embodiment of the embodiment shown in FIG. 2, in which when each of the light guides 1 to 3 is cascaded in the embodiment shown in FIG. A light guide rod 4 having a refractive index greater than the refractive index of the light guide pipe is inserted into the light guide pipe, and each light guide pipe is connected via the guide rod 4. 5 The light propagated in the hollow of the light guide pipe can be introduced into the outer circumferential wall of the light guide pipe, where the light transmission efficiency is superior to that in the air, by the light guide rod 4, resulting in efficient light transmission. It can be performed.

Effects As is clear from the above explanation, according to the present invention, the light propagated through the light guide rod, light guide pipe, etc. can be effectively diffused out of the light guide rod, light guide pipe, etc. with a simple configuration. can be released.

[Brief explanation of the drawing]

1 to 3 are diagrams for explaining embodiments of the optical radiator according to the present invention, and FIGS.
FIG. 2 is a diagram for explaining an example of an optical radiator separately proposed by the applicant. 1 to 3...Light guide rod or light guide pipe, 1a...
- Notch part, 4... light guide rod.

Claims (3)

[Claims] (1) Consisting of at least two light guide rods connected in cascade, the light guide rod having a notch in at least one end surface of the light guide rod at the cascade connection, the light propagating within the light guide rod; An optical radiator characterized in that the light is emitted from the notch to the outside. (2) Consisting of at least two light guide pipes connected in cascade, at least one of the light guide pipes having a notch in an end surface of an outer peripheral wall, and light propagating through the outer peripheral wall of the light guide pipe; An optical radiator characterized in that the light is emitted from the notch to the outside. (3) In the cascade connection section, both the light guide pipes are connected via a light guide rod fitted into the pipes. light radiator.