JPS62289808A - Rainbow generating device - Google Patents

Abstract

PURPOSE:To artificially form a rainbow by a simple constitution, by providing a linear lens on a light emitting end of a photoconductor cable, and bringing parallel rays from the lens to spectrum by a prism. CONSTITUTION:A linear lens 2 for converting a light beam of a light source to parallel rays is placed so as to be opposed to a light emitting end of a photoconductor cable 1 for transmitting a visible light beam. In this state, parallel rays from the lens 2 are brought to spectrum by plural pieces of prisms 3. Accordingly, a light beam from the prism 3 becomes a light beam whose upper side and lower side are a red component of a long wavelength and a blue component of a short wavelength, respectively, and a rainbow is formed. By combining this rainbow with a tree, a fountain, etc., p;aced in a lobby of a hotel and a building, the scene is further enjoyed, and the atmosphere can be improved.

Description

[Detailed description of the invention] 3. Detailed description of the invention Long life! The present invention relates to a rainbow generating device, and more particularly to a device for generating decorative artificial rainbows at any desired location, such as inside a building or other locations with fountains or trees.

BACKGROUND OF THE INVENTION Modern buildings and the like have been devised to provide places for relaxation, such as by installing fountains with decorative trees planted inside the buildings. In particular, hotels and the like are installing these facilities in their lobbies and gardens to improve the atmosphere. However, no matter how ingenious they are, there are limits to how much they can be used; they are all very similar, and there is nothing particularly innovative that will attract the public's attention.

Purpose The present invention was made in view of the above-mentioned circumstances.
In particular, the purpose was to artificially generate rainbows to improve the atmosphere of hotel and building lobbies and provide a more enjoyable place to relax.

Fig. 1 is a configuration diagram for explaining an embodiment of the rainbow generating device according to the present invention. A lens 3 is disposed opposite to the light emitting end of the light guide 1 to convert the light emitted from the light emitting end into parallel rays, and 3 is for receiving the parallel rays from the lens 2 and separating them into spectra. In the illustrated embodiment, a plurality of light guides 1 are arranged in a line, and an elongated linear lens 2 is arranged opposite to the light emitting end row of the light guides arranged in this example. , an elongated prism 3 is arranged opposite to this elongated linear lens 2. Of course, this prism 3 may be a single prism, but as shown in the figure, a large number of prisms 3 may be stacked one on top of the other.

The parallel light from the linear lens 2 is separated by the prism 3 arranged as described above, and the upper side becomes red (R) light with a longer wavelength, and the lower side becomes blue (B) light with a shorter wavelength.
) component light, and the light in the middle is refracted according to each wavelength, forming a rainbow with red at the top and blue at the bottom, but this rainbow is divided into multiple rainbows depending on the distance between the prisms 3. It is very varied and visually pleasing, as they sometimes appear to overlap.

The rainbow formed as described above is irradiated onto any desired decorative objects such as trees, fountains, etc., and cooperates with these objects to make the landscape more enjoyable.

FIG. 2 is a configuration diagram showing another embodiment of the present invention.

In the figure, parts having the same functions as in FIG. 1 are given the same reference numerals as in FIG. 1. In this embodiment, a single optical conductor cable 1 is used as a light source, and a single circular lens 2° and a prism 3 formed in a substantially circular shape are used accordingly. As shown in the figure, the prism 3 may be formed by stacking a large number of prisms 3 in multiple stages to form a circular shape as a whole, or a single circular prism may be used. According to this embodiment, the light conductor cable 1. Lens 2. The arrangement and configuration of prism 3 etc. becomes very easy, and the completed rainbow also becomes approximately circular,
You can make an interesting rainbow.

Effects As is clear from the above explanation, according to the present invention, a rainbow can be artificially created with a simple configuration, and by combining this rainbow with existing decorations such as trees and fountains, it can be made even more effective. You can make the scenery more enjoyable.

[Brief explanation of the drawing]

FIGS. 1 and 2 are configuration diagrams for explaining embodiments of a rainbow generating device according to the present invention, respectively. 1... Optical conductor cable, 2... Lens, 3... Prism.

Claims (3)

[Claims] (1) a light guide through which visible light component light is transmitted; a lens disposed opposite to a light emitting end of the light guide to convert the light emitted from the light emitting end into parallel light; A rainbow generating device characterized by comprising a prism for receiving and separating parallel light from the lens. (2) It has a plurality of light guides, the light emitting ends of which are arranged in a line, and a single linear lens is arranged with respect to the light emitting ends arranged in the line. A rainbow generating device according to claim (1), characterized in that: (3) Claim (1) characterized in that the prism is composed of a plurality of prisms arranged in multiple stages.
or (2).